Add new custom value transformers.

cd2b7c7f · Brent Gulanowski · 949f3d13 · cd2b7c7f · cd2b7c7f · cd2b7c7f
Commit cd2b7c7f authored Apr 08, 2016 by Brent Gulanowski
19 changed files
--- a/Mobile Buy SDK/Mobile Buy SDK.xcodeproj/project.pbxproj
+++ b/Mobile Buy SDK/Mobile Buy SDK.xcodeproj/project.pbxproj
@@ -80,6 +80,42 @@
 		8491103A1CCE718100E53B93 /* BUYExceptionAdditionsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 849110391CCE718100E53B93 /* BUYExceptionAdditionsTests.m */; };
 		8491103C1CCE731900E53B93 /* BUYURLAdditionsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 8491103B1CCE731900E53B93 /* BUYURLAdditionsTests.m */; };
 		8491103E1CCE988600E53B93 /* BUYFontAdditionsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 8491103D1CCE988600E53B93 /* BUYFontAdditionsTests.m */; };
+		84980F291CB75AC200CFAB58 /* BUYObjectProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F281CB75AC200CFAB58 /* BUYObjectProtocol.h */; };
+		84980F2A1CB75AC200CFAB58 /* BUYObjectProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F281CB75AC200CFAB58 /* BUYObjectProtocol.h */; };
+		84980F2C1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F2B1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h */; };
+		84980F2D1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F2B1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h */; };
+		84980F321CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F2E1CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.h */; };
+		84980F331CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F2E1CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.h */; };
+		84980F341CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F2F1CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.m */; };
+		84980F351CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F2F1CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.m */; };
+		84980F361CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F301CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.h */; };
+		84980F371CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F301CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.h */; };
+		84980F381CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F311CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.m */; };
+		84980F391CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F311CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.m */; };
+		84980F4C1CB7613700CFAB58 /* BUYIdentityTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F4A1CB7613700CFAB58 /* BUYIdentityTransformer.h */; };
+		84980F4D1CB7613700CFAB58 /* BUYIdentityTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F4A1CB7613700CFAB58 /* BUYIdentityTransformer.h */; };
+		84980F4E1CB7613700CFAB58 /* BUYIdentityTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F4B1CB7613700CFAB58 /* BUYIdentityTransformer.m */; };
+		84980F4F1CB7613700CFAB58 /* BUYIdentityTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F4B1CB7613700CFAB58 /* BUYIdentityTransformer.m */; };
+		84980F521CB7616900CFAB58 /* BUYDecimalNumberTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F501CB7616900CFAB58 /* BUYDecimalNumberTransformer.h */; };
+		84980F531CB7616900CFAB58 /* BUYDecimalNumberTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F501CB7616900CFAB58 /* BUYDecimalNumberTransformer.h */; };
+		84980F541CB7616900CFAB58 /* BUYDecimalNumberTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F511CB7616900CFAB58 /* BUYDecimalNumberTransformer.m */; };
+		84980F551CB7616900CFAB58 /* BUYDecimalNumberTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F511CB7616900CFAB58 /* BUYDecimalNumberTransformer.m */; };
+		84980F581CB7617500CFAB58 /* BUYURLTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F561CB7617500CFAB58 /* BUYURLTransformer.h */; };
+		84980F591CB7617500CFAB58 /* BUYURLTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F561CB7617500CFAB58 /* BUYURLTransformer.h */; };
+		84980F5A1CB7617500CFAB58 /* BUYURLTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F571CB7617500CFAB58 /* BUYURLTransformer.m */; };
+		84980F5B1CB7617500CFAB58 /* BUYURLTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F571CB7617500CFAB58 /* BUYURLTransformer.m */; };
+		84980F5E1CB7617E00CFAB58 /* BUYDateTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F5C1CB7617E00CFAB58 /* BUYDateTransformer.h */; };
+		84980F5F1CB7617E00CFAB58 /* BUYDateTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F5C1CB7617E00CFAB58 /* BUYDateTransformer.h */; };
+		84980F601CB7617E00CFAB58 /* BUYDateTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F5D1CB7617E00CFAB58 /* BUYDateTransformer.m */; };
+		84980F611CB7617E00CFAB58 /* BUYDateTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 84980F5D1CB7617E00CFAB58 /* BUYDateTransformer.m */; };
+		849810921CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 8498108E1CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.h */; };
+		849810931CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 8498108E1CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.h */; };
+		849810941CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 8498108F1CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.m */; };
+		849810951CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 8498108F1CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.m */; };
+		849810961CB7E07900CFAB58 /* BUYFlatCollectionTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 849810901CB7E07900CFAB58 /* BUYFlatCollectionTransformer.h */; };
+		849810971CB7E07900CFAB58 /* BUYFlatCollectionTransformer.h in Headers */ = {isa = PBXBuildFile; fileRef = 849810901CB7E07900CFAB58 /* BUYFlatCollectionTransformer.h */; };
+		849810981CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 849810911CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m */; };
+		849810991CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m in Sources */ = {isa = PBXBuildFile; fileRef = 849810911CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m */; };
 		9003969B1B601DF400226B73 /* BUYCartLineItem.h in Headers */ = {isa = PBXBuildFile; fileRef = 900396991B601DF400226B73 /* BUYCartLineItem.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		9003969C1B601DF400226B73 /* BUYCartLineItem.m in Sources */ = {isa = PBXBuildFile; fileRef = 9003969A1B601DF400226B73 /* BUYCartLineItem.m */; };
 		900396AC1B627CB900226B73 /* BUYProductView.h in Headers */ = {isa = PBXBuildFile; fileRef = 900396AA1B627CB900226B73 /* BUYProductView.h */; };
@@ -342,7 +378,6 @@
 		BEB74A7E1B5564890005A300 /* BUYVariantSelectionViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = BE9496B11B4D96D800B38949 /* BUYVariantSelectionViewController.m */; };
 		BEB74A901B55A3D00005A300 /* BUYCollection.h in Headers */ = {isa = PBXBuildFile; fileRef = BEB74A8E1B55A3D00005A300 /* BUYCollection.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		BEB9AE781BA8627B00575F8A /* test_shop_data.json in Resources */ = {isa = PBXBuildFile; fileRef = BEB9AE721BA73E6C00575F8A /* test_shop_data.json */; };
-		BEB9AE7B1BA866D000575F8A /* BUYClientTestBase.h in Sources */ = {isa = PBXBuildFile; fileRef = BEB9AE7A1BA866D000575F8A /* BUYClientTestBase.h */; };
 		BEB9AE7D1BA885E300575F8A /* BUYClientTestBase.m in Sources */ = {isa = PBXBuildFile; fileRef = BEB9AE7C1BA8685600575F8A /* BUYClientTestBase.m */; };
 /* End PBXBuildFile section */
@@ -408,6 +443,24 @@
 		849110391CCE718100E53B93 /* BUYExceptionAdditionsTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYExceptionAdditionsTests.m; sourceTree = "<group>"; };
 		8491103B1CCE731900E53B93 /* BUYURLAdditionsTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYURLAdditionsTests.m; sourceTree = "<group>"; };
 		8491103D1CCE988600E53B93 /* BUYFontAdditionsTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYFontAdditionsTests.m; sourceTree = "<group>"; };
+		84980F281CB75AC200CFAB58 /* BUYObjectProtocol.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYObjectProtocol.h; sourceTree = "<group>"; };
+		84980F2B1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYModelManagerProtocol.h; sourceTree = "<group>"; };
+		84980F2E1CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "NSEntityDescription+BUYAdditions.h"; sourceTree = "<group>"; };
+		84980F2F1CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "NSEntityDescription+BUYAdditions.m"; sourceTree = "<group>"; };
+		84980F301CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "NSPropertyDescription+BUYAdditions.h"; sourceTree = "<group>"; };
+		84980F311CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "NSPropertyDescription+BUYAdditions.m"; sourceTree = "<group>"; };
+		84980F4A1CB7613700CFAB58 /* BUYIdentityTransformer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYIdentityTransformer.h; sourceTree = "<group>"; };
+		84980F4B1CB7613700CFAB58 /* BUYIdentityTransformer.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYIdentityTransformer.m; sourceTree = "<group>"; };
+		84980F501CB7616900CFAB58 /* BUYDecimalNumberTransformer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYDecimalNumberTransformer.h; sourceTree = "<group>"; };
+		84980F511CB7616900CFAB58 /* BUYDecimalNumberTransformer.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYDecimalNumberTransformer.m; sourceTree = "<group>"; };
+		84980F561CB7617500CFAB58 /* BUYURLTransformer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYURLTransformer.h; sourceTree = "<group>"; };
+		84980F571CB7617500CFAB58 /* BUYURLTransformer.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYURLTransformer.m; sourceTree = "<group>"; };
+		84980F5C1CB7617E00CFAB58 /* BUYDateTransformer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYDateTransformer.h; sourceTree = "<group>"; };
+		84980F5D1CB7617E00CFAB58 /* BUYDateTransformer.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYDateTransformer.m; sourceTree = "<group>"; };
+		8498108E1CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYDeliveryRangeTransformer.h; sourceTree = "<group>"; };
+		8498108F1CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYDeliveryRangeTransformer.m; sourceTree = "<group>"; };
+		849810901CB7E07900CFAB58 /* BUYFlatCollectionTransformer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYFlatCollectionTransformer.h; sourceTree = "<group>"; };
+		849810911CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYFlatCollectionTransformer.m; sourceTree = "<group>"; };
 		900396991B601DF400226B73 /* BUYCartLineItem.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYCartLineItem.h; sourceTree = "<group>"; };
 		9003969A1B601DF400226B73 /* BUYCartLineItem.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYCartLineItem.m; sourceTree = "<group>"; };
 		900396AA1B627CB900226B73 /* BUYProductView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; lineEnding = 0; name = BUYProductView.h; path = "Product View/BUYProductView.h"; sourceTree = "<group>"; xcLanguageSpecificationIdentifier = xcode.lang.objcpp; };
@@ -613,8 +666,12 @@
 				841ADDF21CB6C942000004B0 /* NSDecimalNumber+BUYAdditions.m */,
 				841ADDF31CB6C942000004B0 /* NSDictionary+BUYAdditions.h */,
 				841ADDF41CB6C942000004B0 /* NSDictionary+BUYAdditions.m */,
+				84980F2E1CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.h */,
+				84980F2F1CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.m */,
 				841ADDF51CB6C942000004B0 /* NSException+BUYAdditions.h */,
 				841ADDF61CB6C942000004B0 /* NSException+BUYModelAdditions.m */,
+				84980F301CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.h */,
+				84980F311CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.m */,
 				841ADDF71CB6C942000004B0 /* NSRegularExpression+BUYAdditions.h */,
 				841ADDF81CB6C942000004B0 /* NSRegularExpression+BUYAdditions.m */,
 				841ADDF91CB6C942000004B0 /* NSString+BUYAdditions.h */,
@@ -680,6 +737,34 @@
 			path = Persistent;
 			sourceTree = "<group>";
 		};
+		84980F271CB75A7A00CFAB58 /* Protocols */ = {
+			isa = PBXGroup;
+			children = (
+				84980F281CB75AC200CFAB58 /* BUYObjectProtocol.h */,
+				84980F2B1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h */,
+			);
+			name = Protocols;
+			sourceTree = "<group>";
+		};
+		84980F491CB760FA00CFAB58 /* Value Transformers */ = {
+			isa = PBXGroup;
+			children = (
+				84980F5C1CB7617E00CFAB58 /* BUYDateTransformer.h */,
+				84980F5D1CB7617E00CFAB58 /* BUYDateTransformer.m */,
+				84980F501CB7616900CFAB58 /* BUYDecimalNumberTransformer.h */,
+				84980F511CB7616900CFAB58 /* BUYDecimalNumberTransformer.m */,
+				8498108E1CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.h */,
+				8498108F1CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.m */,
+				849810901CB7E07900CFAB58 /* BUYFlatCollectionTransformer.h */,
+				849810911CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m */,
+				84980F4A1CB7613700CFAB58 /* BUYIdentityTransformer.h */,
+				84980F4B1CB7613700CFAB58 /* BUYIdentityTransformer.m */,
+				84980F561CB7617500CFAB58 /* BUYURLTransformer.h */,
+				84980F571CB7617500CFAB58 /* BUYURLTransformer.m */,
+			);
+			path = "Value Transformers";
+			sourceTree = "<group>";
+		};
 		906CF1AE1B8B660F001F7D5B /* PKContact Test Objects */ = {
 			isa = PBXGroup;
 			children = (
@@ -869,6 +954,7 @@
 		F773744419C779C20039681C /* Models */ = {
 			isa = PBXGroup;
 			children = (
+				84980F271CB75A7A00CFAB58 /* Protocols */,
 				841ADE2B1CB6F320000004B0 /* Persistent */,
 				841ADE2A1CB6F31C000004B0 /* Transient */,
 				F77374AA19C796BD0039681C /* BUYCreditCard.h */,
@@ -929,6 +1015,7 @@
 				F773744419C779C20039681C /* Models */,
 				90FC31AB1B50589800AFAB51 /* Product View */,
 				F773744519C779C20039681C /* Utils */,
+				84980F491CB760FA00CFAB58 /* Value Transformers */,
 				BE1C4DF21AE98F8E00E21624 /* View Controllers */,
 			);
 			name = Classes;
@@ -952,12 +1039,14 @@
 			files = (
 				901931331BC5B9BC00D1134E /* BUYAddress+Additions.h in Headers */,
 				9019313F1BC5B9BC00D1134E /* BUYProduct+Options.h in Headers */,
+				84980F2A1CB75AC200CFAB58 /* BUYObjectProtocol.h in Headers */,
 				901931561BC5B9BC00D1134E /* BUYProductVariant+Options.h in Headers */,
 				901931271BC5B9BC00D1134E /* BUYAddress.h in Headers */,
 				901931281BC5B9BC00D1134E /* BUYApplePayHelpers.h in Headers */,
 				901931291BC5B9BC00D1134E /* BUYStoreViewController.h in Headers */,
 				9019312A1BC5B9BC00D1134E /* BUYCreditCard.h in Headers */,
 				9019312B1BC5B9BC00D1134E /* BUYOption.h in Headers */,
+				84980F4D1CB7613700CFAB58 /* BUYIdentityTransformer.h in Headers */,
 				9019312C1BC5B9BC00D1134E /* BUYProductVariantCell.h in Headers */,
 				9019312D1BC5B9BC00D1134E /* BUYTheme.h in Headers */,
 				9019312E1BC5B9BC00D1134E /* BUYProductDescriptionCell.h in Headers */,
@@ -967,6 +1056,7 @@
 				901931341BC5B9BC00D1134E /* BUYViewController.h in Headers */,
 				901931351BC5B9BC00D1134E /* BUYDiscount.h in Headers */,
 				901931361BC5B9BC00D1134E /* BUYProductView.h in Headers */,
+				849810931CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.h in Headers */,
 				901931371BC5B9BC00D1134E /* BUYTaxLine.h in Headers */,
 				901931381BC5B9BC00D1134E /* BUYVariantSelectionViewController.h in Headers */,
 				901931391BC5B9BC00D1134E /* BUYOptionValueCell.h in Headers */,
@@ -976,6 +1066,7 @@
 				9019313D1BC5B9BC00D1134E /* BUYShippingRate.h in Headers */,
 				9019313E1BC5B9BC00D1134E /* BUYApplePayAdditions.h in Headers */,
 				901931401BC5B9BC00D1134E /* BUYTheme+Additions.h in Headers */,
+				84980F531CB7616900CFAB58 /* BUYDecimalNumberTransformer.h in Headers */,
 				901931411BC5B9BC00D1134E /* BUYVariantOptionView.h in Headers */,
 				901931421BC5B9BC00D1134E /* BUYMaskedCreditCard.h in Headers */,
 				901931431BC5B9BC00D1134E /* BUYProductViewHeader.h in Headers */,
@@ -987,6 +1078,7 @@
 				841ADE241CB6C942000004B0 /* NSURLComponents+BUYAdditions.h in Headers */,
 				841ADE141CB6C942000004B0 /* NSException+BUYAdditions.h in Headers */,
 				841ADE041CB6C942000004B0 /* NSDate+BUYAdditions.h in Headers */,
+				84980F2D1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h in Headers */,
 				901931451BC5B9BC00D1134E /* UIFont+BUYAdditions.h in Headers */,
 				841ADE081CB6C942000004B0 /* NSDateFormatter+BUYAdditions.h in Headers */,
 				841ADE001CB6C942000004B0 /* NSArray+BUYAdditions.h in Headers */,
@@ -994,6 +1086,7 @@
 				841ADE1C1CB6C942000004B0 /* NSString+BUYAdditions.h in Headers */,
 				841ADE181CB6C942000004B0 /* NSRegularExpression+BUYAdditions.h in Headers */,
 				841ADE0C1CB6C942000004B0 /* NSDecimalNumber+BUYAdditions.h in Headers */,
+				84980F331CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.h in Headers */,
 				901931491BC5B9BC00D1134E /* BUYGiftCard.h in Headers */,
 				9019314B1BC5B9BC00D1134E /* BUYNavigationController.h in Headers */,
 				9019314D1BC5B9BC00D1134E /* BUYVariantOptionBreadCrumbsView.h in Headers */,
@@ -1007,14 +1100,18 @@
 				901931581BC5B9BC00D1134E /* BUYRuntime.h in Headers */,
 				901931591BC5B9BC00D1134E /* BUYCollection.h in Headers */,
 				9019315A1BC5B9BC00D1134E /* BUYProductImageCollectionViewCell.h in Headers */,
+				84980F5F1CB7617E00CFAB58 /* BUYDateTransformer.h in Headers */,
+				84980F591CB7617500CFAB58 /* BUYURLTransformer.h in Headers */,
 				9019315B1BC5B9BC00D1134E /* BUYImageKit.h in Headers */,
 				9019315C1BC5B9BC00D1134E /* BUYCollection+Additions.h in Headers */,
 				9032F2DB1BE9457A00BB9EEF /* BUYCheckoutAttribute.h in Headers */,
 				9019315E1BC5B9BC00D1134E /* BUYError.h in Headers */,
+				84980F371CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.h in Headers */,
 				9019315F1BC5B9BC00D1134E /* BUYProductHeaderCell.h in Headers */,
 				901931601BC5B9BC00D1134E /* BUYProductViewErrorView.h in Headers */,
 				901931611BC5B9BC00D1134E /* BUYClient.h in Headers */,
 				901931631BC5B9BC00D1134E /* BUYGradientView.h in Headers */,
+				849810971CB7E07900CFAB58 /* BUYFlatCollectionTransformer.h in Headers */,
 				901931641BC5B9BC00D1134E /* BUYCartLineItem.h in Headers */,
 				901931661BC5B9BC00D1134E /* BUYCheckout.h in Headers */,
 				901931671BC5B9BC00D1134E /* BUYCart.h in Headers */,
@@ -1031,12 +1128,14 @@
 			files = (
 				BE9A64791B503D420033E558 /* BUYAddress+Additions.h in Headers */,
 				BE9A646A1B503D100033E558 /* BUYProduct+Options.h in Headers */,
+				84980F291CB75AC200CFAB58 /* BUYObjectProtocol.h in Headers */,
 				BE1007951B6038150031CEE7 /* BUYProductVariant+Options.h in Headers */,
 				BE9A64531B503CBE0033E558 /* BUYAddress.h in Headers */,
 				BE9A64741B503D2E0033E558 /* BUYApplePayHelpers.h in Headers */,
 				BE9A647E1B503D930033E558 /* BUYStoreViewController.h in Headers */,
 				BE9A64551B503CC50033E558 /* BUYCreditCard.h in Headers */,
 				BE9A645F1B503CE90033E558 /* BUYOption.h in Headers */,
+				84980F4C1CB7613700CFAB58 /* BUYIdentityTransformer.h in Headers */,
 				BEB74A6F1B5564260005A300 /* BUYProductVariantCell.h in Headers */,
 				BEB74A2B1B554C150005A300 /* BUYTheme.h in Headers */,
 				BEB74A6B1B55641B0005A300 /* BUYProductDescriptionCell.h in Headers */,
@@ -1046,6 +1145,7 @@
 				BE9A644F1B503CA90033E558 /* BUYDiscount.h in Headers */,
 				900396AC1B627CB900226B73 /* BUYProductView.h in Headers */,
 				BE9A64511B503CB00033E558 /* BUYTaxLine.h in Headers */,
+				849810921CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.h in Headers */,
 				BEB74A7D1B5564870005A300 /* BUYVariantSelectionViewController.h in Headers */,
 				BE10079B1B6165EC0031CEE7 /* BUYOptionValueCell.h in Headers */,
 				BE9A64591B503CD40033E558 /* BUYImage.h in Headers */,
@@ -1055,6 +1155,7 @@
 				BE9A646C1B503D180033E558 /* BUYApplePayAdditions.h in Headers */,
 				906EAE431B836DE000976165 /* BUYTheme+Additions.h in Headers */,
 				BEB74A7B1B5564810005A300 /* BUYVariantOptionView.h in Headers */,
+				84980F521CB7616900CFAB58 /* BUYDecimalNumberTransformer.h in Headers */,
 				BE5DC3631B71022D00B2BC1E /* BUYMaskedCreditCard.h in Headers */,
 				BEB74A731B5564350005A300 /* BUYProductViewHeader.h in Headers */,
 				BEB74A751B55643B0005A300 /* BUYProductViewHeaderBackgroundImageView.h in Headers */,
@@ -1066,6 +1167,7 @@
 				841ADE0F1CB6C942000004B0 /* NSDictionary+BUYAdditions.h in Headers */,
 				841ADE1F1CB6C942000004B0 /* NSURL+BUYAdditions.h in Headers */,
 				841ADE231CB6C942000004B0 /* NSURLComponents+BUYAdditions.h in Headers */,
+				84980F2C1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h in Headers */,
 				841ADE131CB6C942000004B0 /* NSException+BUYAdditions.h in Headers */,
 				841ADE031CB6C942000004B0 /* NSDate+BUYAdditions.h in Headers */,
 				841ADE071CB6C942000004B0 /* NSDateFormatter+BUYAdditions.h in Headers */,
@@ -1073,6 +1175,7 @@
 				841ADE1B1CB6C942000004B0 /* NSString+BUYAdditions.h in Headers */,
 				841ADE171CB6C942000004B0 /* NSRegularExpression+BUYAdditions.h in Headers */,
 				841ADE0B1CB6C942000004B0 /* NSDecimalNumber+BUYAdditions.h in Headers */,
+				84980F321CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.h in Headers */,
 				BE9A64571B503CCC0033E558 /* BUYGiftCard.h in Headers */,
 				BEB74A671B55640C0005A300 /* BUYNavigationController.h in Headers */,
 				90DE92701B9897B6002EF4DA /* BUYVariantOptionBreadCrumbsView.h in Headers */,
@@ -1086,14 +1189,18 @@
 				BE9A646E1B503D1E0033E558 /* BUYRuntime.h in Headers */,
 				BEB74A901B55A3D00005A300 /* BUYCollection.h in Headers */,
 				904606AF1B6BC8D700754173 /* BUYProductImageCollectionViewCell.h in Headers */,
+				84980F5E1CB7617E00CFAB58 /* BUYDateTransformer.h in Headers */,
+				84980F581CB7617500CFAB58 /* BUYURLTransformer.h in Headers */,
 				900E7C841B5DA553006F3C81 /* BUYImageKit.h in Headers */,
 				900396F61B69563400226B73 /* BUYCollection+Additions.h in Headers */,
 				9032F2DA1BE9457A00BB9EEF /* BUYCheckoutAttribute.h in Headers */,
 				BE47340F1B66C4EF00AA721A /* BUYError.h in Headers */,
+				84980F361CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.h in Headers */,
 				BEB74A6D1B5564200005A300 /* BUYProductHeaderCell.h in Headers */,
 				903BCC7C1B7D1C2D00C21FEB /* BUYProductViewErrorView.h in Headers */,
 				BE9A64471B503C8B0033E558 /* BUYClient.h in Headers */,
 				BEB74A651B5563FF0005A300 /* BUYGradientView.h in Headers */,
+				849810961CB7E07900CFAB58 /* BUYFlatCollectionTransformer.h in Headers */,
 				9003969B1B601DF400226B73 /* BUYCartLineItem.h in Headers */,
 				BE9A644B1B503C9B0033E558 /* BUYCheckout.h in Headers */,
 				BE9A64491B503C940033E558 /* BUYCart.h in Headers */,
@@ -1272,7 +1379,9 @@
 				901930E41BC5B9BC00D1134E /* BUYOptionSelectionViewController.m in Sources */,
 				901930E51BC5B9BC00D1134E /* BUYVariantOptionView.m in Sources */,
 				841ADE1E1CB6C942000004B0 /* NSString+BUYAdditions.m in Sources */,
+				84980F5B1CB7617500CFAB58 /* BUYURLTransformer.m in Sources */,
 				901930E61BC5B9BC00D1134E /* BUYPresentationControllerForVariantSelection.m in Sources */,
+				84980F611CB7617E00CFAB58 /* BUYDateTransformer.m in Sources */,
 				901930E81BC5B9BC00D1134E /* BUYImage.m in Sources */,
 				901930E91BC5B9BC00D1134E /* BUYProductVariant.m in Sources */,
 				901930EA1BC5B9BC00D1134E /* BUYProductViewController.m in Sources */,
@@ -1287,18 +1396,22 @@
 				901930F41BC5B9BC00D1134E /* BUYProductViewHeaderBackgroundImageView.m in Sources */,
 				901930F51BC5B9BC00D1134E /* BUYProductViewHeaderOverlay.m in Sources */,
 				901930F61BC5B9BC00D1134E /* BUYProductVariantCell.m in Sources */,
+				849810991CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m in Sources */,
 				901930F71BC5B9BC00D1134E /* BUYTheme.m in Sources */,
 				901930F81BC5B9BC00D1134E /* BUYProductVariant+Options.m in Sources */,
 				901930F91BC5B9BC00D1134E /* BUYProductViewErrorView.m in Sources */,
 				901930FA1BC5B9BC00D1134E /* BUYLineItem.m in Sources */,
 				901930FB1BC5B9BC00D1134E /* BUYCheckoutButton.m in Sources */,
+				849810951CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.m in Sources */,
 				901930FC1BC5B9BC00D1134E /* BUYCollection.m in Sources */,
 				901930FD1BC5B9BC00D1134E /* BUYTaxLine.m in Sources */,
 				901930FE1BC5B9BC00D1134E /* BUYCollection+Additions.m in Sources */,
+				84980F351CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.m in Sources */,
 				901930FF1BC5B9BC00D1134E /* BUYVariantOptionBreadCrumbsView.m in Sources */,
 				901931011BC5B9BC00D1134E /* BUYTheme+Additions.m in Sources */,
 				901931021BC5B9BC00D1134E /* BUYStoreViewController.m in Sources */,
 				901931031BC5B9BC00D1134E /* BUYOptionValue.m in Sources */,
+				84980F551CB7616900CFAB58 /* BUYDecimalNumberTransformer.m in Sources */,
 				901931041BC5B9BC00D1134E /* BUYApplePayAdditions.m in Sources */,
 				901931051BC5B9BC00D1134E /* BUYOptionSelectionNavigationController.m in Sources */,
 				901931061BC5B9BC00D1134E /* BUYDiscount.m in Sources */,
@@ -1322,6 +1435,7 @@
 				901931141BC5B9BC00D1134E /* BUYProductViewFooter.m in Sources */,
 				841ADE261CB6C942000004B0 /* NSURLComponents+BUYAdditions.m in Sources */,
 				901931151BC5B9BC00D1134E /* BUYPresentationControllerWithNavigationController.m in Sources */,
+				84980F391CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.m in Sources */,
 				841ADE221CB6C942000004B0 /* NSURL+BUYAdditions.m in Sources */,
 				901931161BC5B9BC00D1134E /* BUYShippingRate.m in Sources */,
 				841ADE061CB6C942000004B0 /* NSDate+BUYAdditions.m in Sources */,
@@ -1335,6 +1449,7 @@
 				9019311F1BC5B9BC00D1134E /* BUYProductView.m in Sources */,
 				901931201BC5B9BC00D1134E /* BUYCreditCard.m in Sources */,
 				901931211BC5B9BC00D1134E /* BUYProductImageCollectionViewCell.m in Sources */,
+				84980F4F1CB7613700CFAB58 /* BUYIdentityTransformer.m in Sources */,
 				901931221BC5B9BC00D1134E /* BUYShop.m in Sources */,
 				901931231BC5B9BC00D1134E /* BUYObject.mm in Sources */,
 				901931241BC5B9BC00D1134E /* BUYProductDescriptionCell.m in Sources */,
@@ -1377,7 +1492,9 @@
 				BEB74A7A1B55647C0005A300 /* BUYOptionSelectionViewController.m in Sources */,
 				BEB74A7C1B5564840005A300 /* BUYVariantOptionView.m in Sources */,
 				841ADE1D1CB6C942000004B0 /* NSString+BUYAdditions.m in Sources */,
+				84980F5A1CB7617500CFAB58 /* BUYURLTransformer.m in Sources */,
 				BEB74A241B554BF20005A300 /* BUYPresentationControllerForVariantSelection.m in Sources */,
+				84980F601CB7617E00CFAB58 /* BUYDateTransformer.m in Sources */,
 				BE9A645A1B503CD90033E558 /* BUYImage.m in Sources */,
 				BE9A64641B503CFB0033E558 /* BUYProductVariant.m in Sources */,
 				BEB74A2E1B554E8B0005A300 /* BUYProductViewController.m in Sources */,
@@ -1392,18 +1509,22 @@
 				BEB74A761B55643E0005A300 /* BUYProductViewHeaderBackgroundImageView.m in Sources */,
 				9078749A1B7276BA0023775B /* BUYProductViewHeaderOverlay.m in Sources */,
 				BEB74A701B5564290005A300 /* BUYProductVariantCell.m in Sources */,
+				849810981CB7E07900CFAB58 /* BUYFlatCollectionTransformer.m in Sources */,
 				BEB74A2C1B554C370005A300 /* BUYTheme.m in Sources */,
 				BE1007961B6038150031CEE7 /* BUYProductVariant+Options.m in Sources */,
 				903BCC7D1B7D1C2D00C21FEB /* BUYProductViewErrorView.m in Sources */,
 				BE9A645C1B503CE00033E558 /* BUYLineItem.m in Sources */,
 				900396B11B67BD0A00226B73 /* BUYCheckoutButton.m in Sources */,
+				849810941CB7E07900CFAB58 /* BUYDeliveryRangeTransformer.m in Sources */,
 				9089CC5E1BB48D06009726D6 /* BUYCollection.m in Sources */,
 				BE9A64521B503CB80033E558 /* BUYTaxLine.m in Sources */,
 				900396F71B69563400226B73 /* BUYCollection+Additions.m in Sources */,
+				84980F341CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.m in Sources */,
 				90DE92711B9897B6002EF4DA /* BUYVariantOptionBreadCrumbsView.m in Sources */,
 				906EAE441B836DE000976165 /* BUYTheme+Additions.m in Sources */,
 				BE9A647F1B503D960033E558 /* BUYStoreViewController.m in Sources */,
 				BE9A64691B503D0C0033E558 /* BUYOptionValue.m in Sources */,
+				84980F541CB7616900CFAB58 /* BUYDecimalNumberTransformer.m in Sources */,
 				BE9A646D1B503D1C0033E558 /* BUYApplePayAdditions.m in Sources */,
 				BEB74A2A1B554BFB0005A300 /* BUYOptionSelectionNavigationController.m in Sources */,
 				BE9A64501B503CAD0033E558 /* BUYDiscount.m in Sources */,
@@ -1427,6 +1548,7 @@
 				BEB74A721B5564320005A300 /* BUYProductViewFooter.m in Sources */,
 				841ADE251CB6C942000004B0 /* NSURLComponents+BUYAdditions.m in Sources */,
 				BEB74A6A1B5564190005A300 /* BUYPresentationControllerWithNavigationController.m in Sources */,
+				84980F381CB75C2900CFAB58 /* NSPropertyDescription+BUYAdditions.m in Sources */,
 				841ADE211CB6C942000004B0 /* NSURL+BUYAdditions.m in Sources */,
 				BE9A644E1B503CA60033E558 /* BUYShippingRate.m in Sources */,
 				841ADE051CB6C942000004B0 /* NSDate+BUYAdditions.m in Sources */,
@@ -1440,6 +1562,7 @@
 				900396AD1B627CB900226B73 /* BUYProductView.m in Sources */,
 				BE9A64561B503CC90033E558 /* BUYCreditCard.m in Sources */,
 				904606B01B6BC8D700754173 /* BUYProductImageCollectionViewCell.m in Sources */,
+				84980F4E1CB7613700CFAB58 /* BUYIdentityTransformer.m in Sources */,
 				BE9A64671B503D060033E558 /* BUYShop.m in Sources */,
 				BE9A645E1B503CE60033E558 /* BUYObject.mm in Sources */,
 				BEB74A6C1B55641D0005A300 /* BUYProductDescriptionCell.m in Sources */,

--- a/Mobile Buy SDK/Mobile Buy SDK/Additions/NSEntityDescription+BUYAdditions.h
+++ b/Mobile Buy SDK/Mobile Buy SDK/Additions/NSEntityDescription+BUYAdditions.h
+//
+//  NSEntityDescription+BUYAdditions.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import <CoreData/CoreData.h>
+@protocol BUYObject;
+@interface NSEntityDescription (BUYAdditions)
+/**
+ * A dictionary of @{ NSString : NSPropertyDescription } where the keys are property names.
+ * By default, returns all attributes (instances of NSAttributeDescription) and relationships (NSRelationshipDescription).
+ */
+@property (nonatomic, readonly, getter=buy_JSONEncodedProperties) NSDictionary *JSONEncodedProperties;
+/**
+ * Returns the custom subclass used for instances of this entity.
+ */
+@property (nonatomic, readonly, getter=buy_managedObjectClass) Class managedObjectClass;
+/**
+ * Signifies whether this entity is private to the app (not used by the endpoint).
+ */
+- (BOOL)buy_isPrivate;
+/**
+ * Generate JSON, recursively, from the provided model object.
+ */
+- (NSDictionary *)buy_JSONForObject:(id<BUYObject>)object;
+/**
+ * Generate JSON, recursively, for each model in the provided array.
+ */
+- (NSArray *)buy_JSONForArray:(NSArray<NSObject<BUYObject> *> *)array;
+/**
+ * Update the properties of the given model object, and child objects, using the given JSON dictionary.
+ */
+- (void)buy_updateObject:(id<BUYObject>)object withJSON:(NSDictionary *)JSON;
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Additions/NSEntityDescription+BUYAdditions.m
+++ b/Mobile Buy SDK/Mobile Buy SDK/Additions/NSEntityDescription+BUYAdditions.m
+//
+//  NSEntityDescription+BUYAdditions.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import "NSEntityDescription+BUYAdditions.h"
+#import "BUYModelManagerProtocol.h"
+#import "BUYObjectProtocol.h"
+#import "NSDictionary+BUYAdditions.h"
+#import "NSPropertyDescription+BUYAdditions.h"
+#import "NSString+BUYAdditions.h"
+@interface NSEntityDescription ()
+/**
+ * Returns a block that maps JSON keys into a property name.
+ * Used when updating model objects from JSON.
+ */
+@property (nonatomic, readonly, getter=buy_JSONKeyEncodingMap) BUYStringMap JSONKeyEncodingMap;
+/**
+ * Returns a block that maps property names into JSON keys.
+ * Used when generating JSON data from model objects.
+ */
+@property (nonatomic, readonly, getter=buy_JSONKeyDecodingMap) BUYStringMap JSONKeyDecodingMap;
+@end
+@implementation NSEntityDescription (BUYAdditions)
+#pragma mark - Derived Properties
+- (Class)buy_managedObjectClass
+{
+	return NSClassFromString(self.managedObjectClassName);
+}
+- (BOOL)buy_isPrivate
+{
+	return [self.userInfo[@"private"] boolValue];
+}
+#pragma mark - Property Lookup Conveniences
+- (NSDictionary *)buy_JSONEncodedProperties
+{
+	NSMutableDictionary *properties = [NSMutableDictionary dictionaryWithDictionary:[self attributesByName]];
+	[properties addEntriesFromDictionary:[self relationshipsByName]];
+	return properties;
+}
+- (NSPropertyDescription *)buy_propertyWithName:(NSString *)name
+{
+	return self.propertiesByName[name];
+}
+#pragma mark - JSON <-> Property key mapping
+// TODO: profile and optimize if necessary
+- (BUYStringMap)buy_JSONKeyEncodingMap
+{
+	NSDictionary *mapping = [self buy_PropertyNameMapping];
+	return ^(NSString *name) {
+		return mapping[name] ?: [name buy_snakeCaseString];
+	};
+}
+- (BUYStringMap)buy_JSONKeyDecodingMap
+{
+	NSDictionary *mapping = [self buy_JSONKeyMapping];
+	return ^(NSString *key) {
+		return mapping[key] ?: [key buy_camelCaseString];
+	};
+}
+#pragma mark - Property lookup
+ (NSDictionary *)buy_defaultPropertyNameMapping
+{
+	return @{ @"identifier" : @"id" };
+}
+// json key -> property name
+- (NSDictionary *)buy_JSONKeyMapping
+{
+	return [[self buy_PropertyNameMapping] buy_reverseDictionary];
+}
+// property name -> json key
+- (NSDictionary *)buy_PropertyNameMapping
+{
+	return [self.propertiesByName buy_dictionaryByMappingValuesWithBlock:^(NSPropertyDescription *property) {
+		return [self buy_JSONKeyForPropertyName:property.name];
+	}];
+}
+- (NSString *)buy_JSONKeyForPropertyName:(NSString *)name
+{
+	return [self buy_propertyWithName:name].JSONPropertyKey ?: [NSEntityDescription buy_defaultPropertyNameMapping][name];
+}
+#pragma mark - Object-Plist transformation
+- (NSDictionary *)buy_JSONForObject:(NSObject<BUYObject> *)object
+{
+	NSAssert([self isEqual:[object entity]], @"%@ entity cannot decode %@ objects", self.name, [object entity].name);
+	// The encoding map is a block which converts property names into JSON keys.
+	BUYStringMap encodingMap = self.JSONKeyEncodingMap;
+	NSMutableDictionary *results = [NSMutableDictionary dictionary];
+	[object.JSONEncodedProperties enumerateKeysAndObjectsUsingBlock:^(NSString *propertyName, NSPropertyDescription *property, BOOL *stop) {
+		id value = [object valueForKey:propertyName];
+		if (value) {
+			// Each property is responsible for knowing how to generate JSON for its value
+			// Some properties do not encode themselves in JSON, so we mut check for nil
+			id JSONValue = [property buy_JSONForValue:value];
+			if (JSONValue) {
+				NSString *JSONKey = encodingMap(propertyName) ?: propertyName;
+				results[JSONKey] = JSONValue;
+			}
+		}
+	}];
+	return results;
+}
+- (NSArray *)buy_JSONForArray:(NSArray<NSObject<BUYObject> *> *)array
+{
+	return [array buy_map:^(NSObject<BUYObject> *object) {
+		return [self buy_JSONForObject:object];
+	}];
+}
+- (void)buy_updateObject:(NSObject<BUYObject> *)object withJSON:(NSDictionary *)JSON
+{
+	NSAssert([self isEqual:[object entity]], @"%@ entity cannot decode %@ objects", self.name, [object entity].name);
+	NSDictionary *properties = self.propertiesByName;
+	// The decoding map is a block which converts the key in the JSON into a property name.
+	BUYStringMap decodingMap = self.JSONKeyDecodingMap;
+	// Iterate through the JSON, and generate the native value using the property object.
+	NSMutableDictionary *results = [NSMutableDictionary dictionary];
+	[JSON enumerateKeysAndObjectsUsingBlock:^(NSString *key, id value, BOOL * stop) {
+		NSString *propertyName = decodingMap(key) ?: key;
+		NSPropertyDescription *property = properties[propertyName];
+		// Each property is responsible for knowing how to parse JSON for its value
+		results[propertyName] = [property buy_valueForJSON:value object:object];
+	}];
+	[object setValuesForKeysWithDictionary:results];
+}
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Additions/NSPropertyDescription+BUYAdditions.h
+++ b/Mobile Buy SDK/Mobile Buy SDK/Additions/NSPropertyDescription+BUYAdditions.h
+//
+//  NSPropertyDescription+BUYAdditions.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import <CoreData/CoreData.h>
+@class BUYModelManager;
+@protocol BUYObject;
+// property user info keys
+extern NSString * const BUYJSONValueTransformerUserInfoKey; // = @"JSONValueTransformer";
+extern NSString * const BUYJSONPropertyKeyUserInfoKey;      // = @"JSONPropertyKey";
+@interface NSPropertyDescription (BUYAdditions)
+/**
+ * The name of a value transformer used to convert to JSON values and back.
+ * Uses the value specified in the property's user info dictionary under the "JSONValueTransformer" key.
+ *
+ * Currently only two transformers are supported: "BUYPublicationsDate" and "BUYShippingRateDate".
+ * Currently, only attributes (instances of NSAttributeDescription) use value transformers.
+ */
+@property (nonatomic, readonly, getter=buy_JSONValueTransformerName) NSString *JSONValueTransformerName;
+/**
+ * The value transformer corresponding to the JSONValueTransformerName. If no name is specified,
+ * the value is not changed.
+ */
+@property (nonatomic, readonly, getter=buy_JSONValueTransformer) NSValueTransformer *JSONValueTransformer;
+/**
+ * The name of the key to use for the property, instead of its name, when generating JSON. Requires
+ * adding an entry in the Property userInfo, in the Core Data model file, with the key "JSONPropertyKey".
+ */
+@property (nonatomic, readonly, getter=buy_JSONPropertyKey) NSString *JSONPropertyKey;
+/**
+ * Convert the provided JSON into the appropriate data type, either simple values or model objects.
+ * For relationships, uses the destinationEntity to recursively fetch or create related objects as needed.
+ */
+- (id)buy_valueForJSON:(id)JSON object:(id<BUYObject>)object;
+/**
+ * Convert the provided object, a value corresponding to the property on the parent object.
+ *
+ * For relationships, related object data is generated according to the following rules:
+ * - if the "JSONPropertyKey" is set in the user info dictionary, and it ends in "_id" (or "_ids")
+ *   then encode the related object(s) using only their identifier(s)
+ * - if the inverse relationship delete rule is "Cascade", or its entity is marked private,
+ *   or the relationship is many-to-many, do not encode the object for this relationship
+ *   (it is inferred that the related object owns this object; this avoids a loop in the encoding)
+ * - otherwise, encode the full JSON representation of the related object(s)
+ */
+- (id)buy_JSONForValue:(id)value;
+@end
+@interface NSRelationshipDescription (BUYAdditions)
+/**
+ * Used during JSON transformation. If the value is YES, parsed JSON is expected to be a number
+ * representing an object identifier, which will be resolved by fetching from the persistent store.
+ * Likewise, generated JSON will include identifiers in place of full objects.
+ */
+@property (nonatomic, readonly, getter=buy_encodesIdInJSON) BOOL encodesIdInJSON;
+/**
+ * YES if the delete rule is not Cascading and the entity is not private.
+ */
+@property (nonatomic, readonly, getter=buy_allowsInverseEncoding) BOOL allowsInverseEncoding;
+/**
+ * YES if this relationship and its inverse are both toMany
+ */
+@property (nonatomic, readonly, getter=buy_isManyToMany) BOOL manyToMany;
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Additions/NSPropertyDescription+BUYAdditions.m
+++ b/Mobile Buy SDK/Mobile Buy SDK/Additions/NSPropertyDescription+BUYAdditions.m
+//
+//  NSPropertyDescription+BUYAdditions.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import "NSPropertyDescription+BUYAdditions.h"
+#import "BUYModelManagerProtocol.h"
+#import "BUYObjectProtocol.h"
+#import "NSDecimalNumber+BUYAdditions.h"
+#import "NSArray+BUYAdditions.h"
+#import "NSException+BUYAdditions.h"
+#import "NSEntityDescription+BUYAdditions.h"
+#import "BUYDateTransformer.h"
+#import "BUYDecimalNumberTransformer.h"
+#import "BUYIdentityTransformer.h"
+#import "BUYURLTransformer.h"
+// User Info Keys
+NSString * const BUYJSONValueTransformerUserInfoKey = @"JSONValueTransformer";
+NSString * const BUYJSONPropertyKeyUserInfoKey = @"JSONPropertyKey";
+// This is defined by mogenerator
+static NSString * const BUYAttributeValueClassNameKey = @"attributeValueClassName";
+#pragma mark -
+@interface NSObject (BUYValueTransforming)
+- (BOOL)buy_isValidObject;
+ (NSString *)buy_JSONValueTransformerName;
+@end
+#pragma mark -
+@implementation NSPropertyDescription (BUYAdditions)
+- (NSString *)buy_JSONValueTransformerName
+{
+	static dispatch_once_t onceToken;
+	dispatch_once(&onceToken, ^{
+		// default transformer
+		[NSValueTransformer setValueTransformer:[[BUYIdentityTransformer alloc] init] forName:BUYIdentityTransformerName];
+		// attribute type transformers
+		[NSValueTransformer setValueTransformer:[[BUYDecimalNumberTransformer alloc] init] forName:BUYDecimalNumberTransformerName];
+		// value type transformers
+		[NSValueTransformer setValueTransformer:[[BUYURLTransformer alloc] init] forName:BUYURLTransformerName];
+	});
+	return self.userInfo[BUYJSONValueTransformerUserInfoKey];
+}
+- (NSString *)buy_JSONPropertyKey
+{
+	return self.userInfo[BUYJSONPropertyKeyUserInfoKey];
+}
+- (NSValueTransformer *)buy_JSONValueTransformer
+{
+	return [NSValueTransformer valueTransformerForName:self.JSONValueTransformerName];
+}
+- (id)buy_valueForJSON:(id)JSON object:(id<BUYObject>)object
+{
+	@throw BUYAbstractMethod();
+}
+- (id)buy_JSONForValue:(id)object
+{
+	@throw BUYAbstractMethod();
+}
+@end
+#pragma mark -
+static NSString *JSONValueTransformerNameForAttributeType(NSAttributeType type)
+{
+	NSString *name = nil;
+	switch (type) {
+		case NSDateAttributeType:
+			name = BUYDateTransformerName;
+			break;
+		case NSDecimalAttributeType:
+			name = BUYDecimalNumberTransformerName;
+			break;
+		default:
+			break;
+	}
+	return name;
+}
+@implementation NSAttributeDescription (BUYAdditions)
+- (NSString *)buy_attributeValueClassName
+{
+	return self.userInfo[BUYAttributeValueClassNameKey];
+}
+- (Class)buy_attributeValueClass
+{
+	return NSClassFromString([self buy_attributeValueClassName]);
+}
+- (NSString *)buy_JSONValueTransformerName
+{
+	NSString *name = [super buy_JSONValueTransformerName];
+	if (name == nil) {
+		name = JSONValueTransformerNameForAttributeType(self.attributeType);
+	}
+	if (name == nil) {
+		name = [[self buy_attributeValueClass] buy_JSONValueTransformerName];
+	}
+	if (name == nil) {
+		name = BUYIdentityTransformerName;
+	}
+	return name;
+}
+- (id)buy_valueForJSON:(id)JSON object:(id<BUYObject>)object
+{
+	// An attribute's value is determined by the specified transformer.
+	// An Identity transform returns the same value. `nil` is converted into `NSNull`.
+	id transformedValue = [JSON buy_isValidObject] ? [self.JSONValueTransformer reverseTransformedValue:JSON] : [NSNull null];
+	return transformedValue ?: [NSNull null];
+}
+- (id)buy_JSONForValue:(id)object
+{
+	// An attribute's JSON is determined by the specified transformer.
+	// An identify transform returns the same value.
+	return [self.JSONValueTransformer transformedValue:object];
+}
+@end
+#pragma mark -
+@implementation NSRelationshipDescription (BUYAdditions)
+- (NSString *)encodesIdSuffix
+{
+	return (self.isToMany ? @"_ids" : @"_id");
+}
+- (BOOL)buy_encodesIdInJSON
+{
+	return [self.JSONPropertyKey hasSuffix:[self encodesIdSuffix]];
+}
+- (id)buy_transformArray:(NSArray<id<BUYObject>> *)array
+{
+	return self.isOrdered ? [NSOrderedSet orderedSetWithArray:array] : [NSSet setWithArray:array];
+}
+- (id)buy_objectForJSON:(id)JSON modelManager:(id<BUYModelManager>)modelManager
+{
+	NSString *entityName = self.destinationEntity.name;
+	// If we are expecting an object `id` the object should already exist.
+	// Otherwise let the object context decide how to resolve the object and update it.
+	if (self.encodesIdInJSON) {
+		return [modelManager buy_objectWithEntityName:entityName identifier:JSON];
+	}
+	else {
+		return [modelManager buy_objectWithEntityName:entityName JSONDictionary:JSON];
+	}
+}
+- (id)buy_collectionForJSON:(NSArray *)JSON object:(id<BUYObject>)object
+{
+	NSString *entityName = self.destinationEntity.name;
+	NSArray<id<BUYObject>> *array;
+	// If we are expecting an array of object `ids`, the objects should already exist.
+	// Otherwise, let the object context decide how to resolve the objects and update them.
+	// If device caching is not provided, this will return nothing.
+	if (self.encodesIdInJSON) {
+		array = [object.modelManager buy_objectsWithEntityName:entityName identifiers:JSON];
+	}
+	else {
+		array = [object.modelManager buy_objectsWithEntityName:entityName JSONArray:JSON];
+	}
+	// Transform the array to the correct container type (`NSSet` or `NSOrderedSet`).
+	return [self buy_transformArray:array];
+}
+- (id)buy_valueForJSON:(id)JSON object:(id<BUYObject>)object
+{
+	// A relationship's value is provided by the object context.
+	// The logic for decoding JSON is slightly different for to-one and to-many relationships.
+	// NOTE: by default, without a caching system, inverse relationships are not supported.
+	if (JSON && ![JSON isEqual:[NSNull null]]) {
+		if (self.isToMany) {
+			return [self buy_collectionForJSON:JSON object:object];
+		}
+		else {
+			return [self buy_objectForJSON:JSON modelManager:object.modelManager];
+		}
+	}
+	else {
+		return nil;
+	}
+}
+- (id)buy_JSONForValue:(id)value
+{
+	return self.toMany ? [self buy_JSONForCollection:value] : [self buy_JSONForObject:value];
+}
+- (NSArray *)buy_JSONForCollection:(id)collection
+{
+	if (self.manyToMany) {
+		return nil;
+	}
+	NSArray *array = [self buy_arrayForCollection:collection];
+	return self.encodesIdInJSON ? [array valueForKey:@"identifier"] : [self.destinationEntity buy_JSONForArray:array];
+}
+- (NSArray *)buy_arrayForCollection:(id)collection
+{
+	return self.ordered ? [collection array] : [collection allObjects];
+}
+- (id)buy_JSONForObject:(NSObject<BUYObject> *)object
+{
+	// JSON generation for a relationship depends on the rules defined in the model.
+	// The model can explicitly specify using an `id` encoding.
+	// Alternately, if the relationship is compatible, encode the entire object.
+	// We do not encode related objects unless three conditions are satisfied:
+	// 1. the relationship is not many-to-many
+	// 2. the inverse relationship is not an ownership relationship
+	//    (this is inferred from the `NSCascadeDeleteRule` used by owning objects)
+	// 3. the relationship is to a "private" entity (not known to the API)
+	if (self.encodesIdInJSON) {
+		return [[object valueForKey:self.name] identifier];
+	}
+	else if (!self.inverseRelationship || self.inverseRelationship.allowsInverseEncoding) {
+		return [self.destinationEntity buy_JSONForObject:object];
+	}
+	else {
+		return nil;
+	}
+}
+- (BOOL)buy_isManyToMany
+{
+	return self.toMany && self.inverseRelationship.toMany;
+}
+- (BOOL)buy_allowsInverseEncoding
+{
+	return self.deleteRule != NSCascadeDeleteRule && ![self.entity buy_isPrivate];
+}
+@end
+#pragma mark -
+@implementation NSFetchedPropertyDescription (BUYAdditions)
+- (id)buy_valueForJSON:(id)JSON object:(id<BUYObject>)object
+{
+	return nil;
+}
+- (id)buy_reverseTransformedJSONValue:(id)value
+{
+	return nil;
+}
+@end
+#pragma mark -
+// We could be really clever here and use an algorithm for string transformation
+// but it's not worth it right now.
+@implementation NSObject (BUYValueTransforming)
+ (NSString *)buy_JSONValueTransformerName
+{
+	return BUYIdentityTransformerName;
+}
+- (BOOL)buy_isValidObject
+{
+	return YES;
+}
+@end
+@implementation NSNull (BUYValueTransforming)
+- (BOOL)buy_isValidObject
+{
+	return NO;
+}
+@end
+@implementation NSURL (BUYValueTransforming)
+ (NSString *)buy_JSONValueTransformerName
+{
+	return BUYURLTransformerName;
+}
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Models/BUYModelManagerProtocol.h
+++ b/Mobile Buy SDK/Mobile Buy SDK/Models/BUYModelManagerProtocol.h
+//
+//  BUYModelManagerProtocol.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import <CoreData/CoreData.h>
+/**
+ * A protocol for defining an object that can store and retrieve model objects from a data store or other cache.
+ */
+@protocol BUYModelManager <NSObject>
+/**
+ *  Returns an entity given its name.
+ *
+ *  @param entityName Name of the entity from the Core Data managed object model.
+ *
+ *  @return The entity description matching the name.
+ */
+- (NSEntityDescription *)buy_entityWithName:(NSString *)entityName;
+/**
+ * If the JSON contains a key representing the unique identifier, and there is an existing cached object that matches that identifier,
+ * then that object will be updated with the remaining entries in the JSON. If no such object exists, a new object is created, and
+ * sent -updateWithJSON:.
+ *
+ *  @param entityName Name of the entity from the Core Data managed object model.
+ *  @param JSON       The JSON representing the object.
+ *
+ *  @return A new or existing model object.
+ */
+- (id<BUYObject>)buy_objectWithEntityName:(NSString *)entityName JSONDictionary:(NSDictionary *)JSON;
+- (NSArray<id<BUYObject>> *)buy_objectsWithEntityName:(NSString *)entityName JSONArray:(NSArray *)JSON;
+/**
+ * Cache-based model managers may resolve objects based on their identifier. The alternative is to return nil.
+ * Only supported by models whose entity declares an "identifier" attribute.
+ *
+ *  @param entityName Name of the entity from the Core Data managed object model.
+ *  @param identifier A shopify object identifier of an existing object in the local data cache.
+ *
+ *  @return An object from the cache matching the provided identifier, or nil if no matching object is found.
+ */
+- (id<BUYObject>)buy_objectWithEntityName:(NSString *)entityName identifier:(NSNumber *)identifier;
+/**
+ *  Find all the objects in the cache matching the provided identifiers.
+ *
+ *  @param entityName  Name of the entity from the Core Data managed object model.
+ *  @param identifiers An array of Shopify object identifiers.
+ *
+ *  @return An array of objects from the cache matching the provided identifiers, if any.
+ */
+- (NSArray<id<BUYObject>> *)buy_objectsWithEntityName:(NSString *)entityName identifiers:(NSArray *)identifiers;
+/**
+ * If there is a local cache available, and the object is cached, it is flushed from the cache. Depending on the type of
+ * caching in use (if any), the provided object may no longer be valid, and references should be reset. If the cache
+ * supports stand-alone objects, and the object is modified or passed into the SDK, it could be re-inserted into the cache.
+ *
+ * If Core Data is used for local caching, purging is equivalent to deletion. (see -deleteObject[WithIdentifier]:error:)
+ *
+ * If the object is not in the cache (or there is no cache), does nothing.
+ *
+ *  @param object An existing model object.
+ *  @param error  A pointer to an error. May be NULL.
+ *
+ *  @return YES if the object was successfully removed from the cache. NO if there was an error.
+ */
+- (BOOL)buy_purgeObject:(id<BUYObject>)object error:(NSError **)error;
+/**
+ * Update the cached version of the object given the current state of the object.
+ *
+ *  @param object An existing model object.
+ */
+- (void)buy_refreshCacheForObject:(id<BUYObject>)object;
+/**
+ *
+ *  @param entityName Name of the entity from the Core Data managed object model.
+ *  @param predicate  An NSPredicate that identifies objects that should be deleted from the cache.
+ *
+ *  @return YES if the purge was successful. NO if there was a problem.
+ */
+- (BOOL)buy_purgeObjectsWithEntityName:(NSString *)entityName matchingPredicate:(NSPredicate *)predicate;
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Models/BUYObjectProtocol.h
+++ b/Mobile Buy SDK/Mobile Buy SDK/Models/BUYObjectProtocol.h
+//
+//  BUYObjectProtocol.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import <Foundation/Foundation.h>
+@protocol BUYModelManager;
+/**
+ * The BUYObject protocol is adopted by the common superclasses of both persistent and transient model classes.
+ *
+ */
+@protocol BUYObject <NSObject>
+@property (nonatomic, readonly, weak) id<BUYModelManager> modelManager;
+/**
+ * Transient model objects need an entity for introspection.
+ */
+@property (nonatomic, readonly, weak) NSEntityDescription *entity;
+/**
+ * A dictionary of @{ NSString : NSPropertyDescription } where the keys are property names.
+ * By default, returns the same value defined on NSEntityDescription (from BUYAdditions).
+ */
+@property (nonatomic, readonly) NSDictionary *JSONEncodedProperties;
+/**
+ * Convenience static property overridden by auto-generated model files.
+ */
+ (NSString *)entityName;
+/**
+ * A derived property used to generate or apply JSON data. Values are calculated, recursively, automatically.
+ */
+@property (nonatomic, strong) NSDictionary *JSONDictionary;
+/**
+ * A predicate composed of values from the JSON. For objects that do not have an "identifier"/"id" property.
+ */
+ (NSPredicate *)fetchPredicateWithJSON:(NSDictionary *)JSONDictionary;
+/**
+ * Persistent classes return YES; transient classes return NO.
+ */
+ (BOOL)isPersistentClass;
+/**
+ * Conforming classes should override to specify whether to use dirty tracking to restrict generated JSON to only changed values.
+ */
+ (BOOL)tracksDirtyProperties;
+/**
+ * Use the values in the given dictionary to update properties.
+ */
+- (void)updateWithJSONDictionary:(NSDictionary *)dictionary;
+@optional
+- (instancetype)initWithModelManager:(id<BUYModelManager>)modelManager JSONDictionary:(NSDictionary *)dictionary;
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDateTransformer.h
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDateTransformer.h
+//
+//  BUYDateTransformer.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import <Foundation/Foundation.h>
+extern NSString * const BUYDateTransformerName; // = @"BUYDate";
+/**
+ * Transforms a date object into a string and back using the provided format string.
+ */
+@interface BUYDateTransformer : NSValueTransformer
+ (instancetype)dateTransformerWithFormat:(NSString *)format;
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDateTransformer.m
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDateTransformer.m
+//
+//  BUYDateTransformer.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import "BUYDateTransformer.h"
+NSString * const BUYDateTransformerName = @"BUYDate";
+@interface BUYDateTransformer ()
+@property (nonatomic, strong) NSDateFormatter *dateFormatter;
+@end
+@implementation BUYDateTransformer
+- (instancetype)initWithDateFormatter:(NSDateFormatter *)formatter
+{
+	self = [super init];
+	if (self) {
+		self.dateFormatter = formatter;
+	}
+	return self;
+}
+- (NSString *)transformedValue:(NSDate *)value
+{
+	return [self.dateFormatter stringFromDate:value];
+}
+- (NSDate *)reverseTransformedValue:(NSString *)value
+{
+	return [self.dateFormatter dateFromString:value];
+}
+ (instancetype)dateTransformerWithFormat:(NSString *)format
+{
+	NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
+	[formatter setDateFormat:format];
+	return [[self alloc] initWithDateFormatter:formatter];
+}
+ (BOOL)allowsReverseTransformation
+{
+	return YES;
+}
+ (Class)transformedValueClass
+{
+	return [NSString class];
+}
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDecimalNumberTransformer.h
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDecimalNumberTransformer.h
+//
+//  BUYDecimalNumberTransformer.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import <Foundation/Foundation.h>
+extern NSString * const BUYDecimalNumberTransformerName; // = @"BUYDecimalNumber";
+/**
+ * Transforms a decimal number object into a string and back.
+ */
+@interface BUYDecimalNumberTransformer : NSValueTransformer
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDecimalNumberTransformer.m
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDecimalNumberTransformer.m
+//
+//  BUYDecimalNumberTransformer.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import "BUYDecimalNumberTransformer.h"
+#import "NSDecimalNumber+BUYAdditions.h"
+NSString * const BUYDecimalNumberTransformerName = @"BUYDecimalNumber";
+@implementation BUYDecimalNumberTransformer
+ (Class)transformedValueClass
+{
+	return [NSString class];
+}
+ (BOOL)allowsReverseTransformation
+{
+	return YES;
+}
+- (id)transformedValue:(NSDecimalNumber *)value
+{
+	return [value stringValue];
+}
+- (id)reverseTransformedValue:(id)value
+{
+	return [NSDecimalNumber buy_decimalNumberFromJSON:value];
+}
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDeliveryRangeTransformer.h
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDeliveryRangeTransformer.h
+//
+//  BUYDeliveryRangeTransformer.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import <Foundation/Foundation.h>
+extern NSString * const BUYShippingRateDateTransformerName; // = @"BUYShippingRateDate";
+extern NSString * const BUYShippingRateDateFormat; // = @"yyyy-MM-dd'T'HH:mm:ss.SSSZ";
+@interface BUYDeliveryRangeTransformer : NSValueTransformer
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDeliveryRangeTransformer.m
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYDeliveryRangeTransformer.m
+//
+//  BUYDeliveryRangeTransformer.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import "BUYDeliveryRangeTransformer.h"
+#import "BUYDateTransformer.h"
+#import "NSArray+BUYAdditions.h"
+NSString * const BUYShippingRateDateTransformerName = @"BUYShippingRateDate";
+NSString * const BUYShippingRateDateFormat = @"yyyy-MM-dd'T'HH:mm:ss.SSSZ";
+@implementation BUYDeliveryRangeTransformer
+ (void)initialize
+{
+	static dispatch_once_t onceToken;
+	dispatch_once(&onceToken, ^{
+		[NSValueTransformer setValueTransformer:[BUYDateTransformer dateTransformerWithFormat:BUYShippingRateDateFormat] forName:BUYShippingRateDateTransformerName];
+	});
+}
+- (NSArray *)transformedValue:(NSArray *)value
+{
+	NSValueTransformer *dateTransformer = [NSValueTransformer valueTransformerForName:BUYShippingRateDateTransformerName];
+	return [value buy_map:^(NSDate *date) {
+		return [dateTransformer transformedValue:date];
+	}];
+}
+- (NSArray *)reverseTransformedValue:(NSArray *)value
+{
+	NSValueTransformer *dateTransformer = [NSValueTransformer valueTransformerForName:BUYShippingRateDateTransformerName];
+	return [value buy_map:^(NSString *dateString) {
+		return [dateTransformer reverseTransformedValue:dateString];
+	}];
+}
+ (BOOL)allowsReverseTransformation
+{
+	return YES;
+}
+ (Class)transformedValueClass
+{
+	return [NSString class];
+}
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYFlatCollectionTransformer.h
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYFlatCollectionTransformer.h
+//
+//  BUYFlatCollectionTransformer.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import <Foundation/Foundation.h>
+/**
+ * Transforms an array of objects into a string with given separator.
+ */
+@interface BUYFlatCollectionTransformer : NSValueTransformer
+ (instancetype)arrayTransformerWithElementTransformer:(NSValueTransformer *)elementTransformer separator:(NSString *)separator;
+ (instancetype)setTransformerWithElementTransformer:(NSValueTransformer *)elementTransformer separator:(NSString *)separator;
+ (instancetype)orderedSetTransformerWithElementTransformer:(NSValueTransformer *)elementTransformer separator:(NSString *)separator;
+/**
+ * Default to using the identity transformer and a space as separator.
+ */
+ (instancetype)arrayTransformer;
+ (instancetype)setTransformer;
+ (instancetype)arrayTransformerWithSeparator:(NSString *)separator;
+ (instancetype)setTransformerWithSeparator:(NSString *)separator;
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYFlatCollectionTransformer.m
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYFlatCollectionTransformer.m
+//
+//  BUYFlatCollectionTransformer.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import "BUYFlatCollectionTransformer.h"
+#import "BUYIdentityTransformer.h"
+#import "NSArray+BUYAdditions.h"
+@interface BUYFlatCollectionTransformer ()
+@property (nonatomic, weak) Class collectionClass;
+@property (nonatomic, strong) NSValueTransformer *elementTransformer;
+@property (nonatomic, strong) NSString *separator;
+@end
+@implementation BUYFlatCollectionTransformer
+ (instancetype)collectionTransformerWithClass:(Class)klass elementTransformer:(NSValueTransformer *)elementTransformer separator:(NSString *)separator
+{
+	BUYFlatCollectionTransformer *transformer = [[BUYFlatCollectionTransformer alloc] init];
+	transformer.collectionClass = klass;
+	transformer.separator = separator;
+	transformer.elementTransformer = elementTransformer;
+	return transformer;
+}
+ (instancetype)arrayTransformerWithElementTransformer:(NSValueTransformer *)elementTransformer separator:(NSString *)separator
+{
+	return [self collectionTransformerWithClass:[NSArray class] elementTransformer:elementTransformer separator:separator];
+}
+ (instancetype)arrayTransformer
+{
+	return [self arrayTransformerWithElementTransformer:[[BUYIdentityTransformer alloc] init] separator:@" "];
+}
+ (instancetype)arrayTransformerWithSeparator:(NSString *)separator
+{
+	return [self arrayTransformerWithElementTransformer:[[BUYIdentityTransformer alloc] init] separator:separator];
+}
+ (instancetype)setTransformerWithElementTransformer:(NSValueTransformer *)elementTransformer separator:(NSString *)separator
+{
+	return [self collectionTransformerWithClass:[NSSet class] elementTransformer:elementTransformer separator:separator];
+}
+ (instancetype)setTransformerWithSeparator:(NSString *)separator
+{
+	return [self setTransformerWithElementTransformer:[[BUYIdentityTransformer alloc] init] separator:separator];
+}
+ (instancetype)setTransformer
+{
+	return [self setTransformerWithSeparator:@" "];
+}
+ (instancetype)orderedSetTransformerWithElementTransformer:(NSValueTransformer *)elementTransformer separator:(NSString *)separator
+{
+	return [self collectionTransformerWithClass:[NSOrderedSet class] elementTransformer:elementTransformer separator:separator];
+}
+ (instancetype)orderedSetTransformerWithSeparator:(NSString *)separator
+{
+	return [self orderedSetTransformerWithElementTransformer:[[BUYIdentityTransformer alloc] init] separator:separator];
+}
+ (Class)transformedValueClass
+{
+	return [NSString class];
+}
+ (BOOL)allowsReverseTransformation
+{
+	return YES;
+}
+- (NSString *)transformedValue:(id)value
+{
+	return [[[value buy_array] buy_map:^(id element) {
+		return [_elementTransformer transformedValue:element];
+	}] componentsJoinedByString:self.separator];
+}
+- (id)reverseTransformedValue:(NSString *)value
+{
+	NSArray *array = [[value componentsSeparatedByString:self.separator] buy_map:^(NSString *string) {
+		return [_elementTransformer reverseTransformedValue:string];
+	}];
+	return [_collectionClass buy_convertArray:array];
+}
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYIdentityTransformer.h
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYIdentityTransformer.h
+//
+//  BUYIdentityTransformer.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import <Foundation/Foundation.h>
+extern NSString * const BUYIdentityTransformerName; //  = @"BUYIdentity";
+/**
+ * Transforms a value into itself.
+ */
+@interface BUYIdentityTransformer : NSValueTransformer
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYIdentityTransformer.m
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYIdentityTransformer.m
+//
+//  BUYIdentityTransformer.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import "BUYIdentityTransformer.h"
+NSString * const BUYIdentityTransformerName = @"BUYIdentity";
+@implementation BUYIdentityTransformer
+- (id)transformedValue:(id)value
+{
+	return value;
+}
+- (id)reverseTransformedValue:(id)value
+{
+	return value;
+}
+ (BOOL)allowsReverseTransformation
+{
+	return YES;
+}
+ (Class)transformedValueClass
+{
+	return [NSObject class];
+}
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYURLTransformer.h
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYURLTransformer.h
+//
+//  BUYURLTransformer.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import <Foundation/Foundation.h>
+extern NSString * const BUYURLTransformerName; // = @"BUYURL";
+/**
+ * Transforms a URL object into a string and back.
+ */
+@interface BUYURLTransformer : NSValueTransformer
+@end
--- a/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYURLTransformer.m
+++ b/Mobile Buy SDK/Mobile Buy SDK/Value Transformers/BUYURLTransformer.m
+//
+//  BUYURLTransformer.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+#import "BUYURLTransformer.h"
+NSString * const BUYURLTransformerName = @"BUYURL";
+@implementation BUYURLTransformer
+ (Class)transformedValueClass
+{
+	return [NSString class];
+}
+ (BOOL)allowsReverseTransformation
+{
+	return YES;
+}
+- (id)transformedValue:(NSURL *)value
+{
+	return [value absoluteString];
+}
+- (id)reverseTransformedValue:(NSString *)value
+{
+	return [NSURL URLWithString:value];
+}
+@end