Added support for transformed values in the entity model.

Previously this was not supported. If there is a value transformer associated, it is now applied to the value before adding to the sync change, or retrieving it.
bfolder · Aug 6, 2012 · e57262e · e57262e
1 parent 9c2be33
commit e57262e
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Showing 3 changed files with 37 additions and 9 deletions.
diff --git a/TICoreDataSync/02 Primary Classes/Generic Operations/TICDSSynchronizationOperation.m b/TICoreDataSync/02 Primary Classes/Generic Operations/TICDSSynchronizationOperation.m
@@ -760,7 +760,7 @@ - (void)applyObjectInsertedSyncChange:(TICDSSyncChange *)aSyncChange
 
     NSString *entityName = [aSyncChange objectEntityName];
     NSString *ticdsSyncID = aSyncChange.objectSyncID;
-    NSManagedObject *object = nil;
+    TICDSSynchronizedManagedObject *object = nil;
 
     // Check to see if the object already exists before inserting it.
     NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
@@ -782,7 +782,9 @@ - (void)applyObjectInsertedSyncChange:(TICDSSyncChange *)aSyncChange
     NSArray *changedAttributeKeys = [[aSyncChange changedAttributes] allKeys];
     for (id key in changedAttributeKeys) {
         [object willChangeValueForKey:key];
-        [object setPrimitiveValue:[[aSyncChange changedAttributes] valueForKey:key] forKey:key];
+        id transformedValue = [[aSyncChange changedAttributes] valueForKey:key];
+        transformedValue = [object reverseTransformedValueOfAttribute:key withValue:transformedValue];
+        [object setPrimitiveValue:transformedValue forKey:key];
         [object didChangeValueForKey:key];
     }
 
@@ -796,7 +798,7 @@ - (void)applyAttributeChangeSyncChange:(TICDSSyncChange *)aSyncChange
 {
     TICDSLog(TICDSLogVerbosityEveryStep, @"Applying Attribute Change sync change");
 
-    NSManagedObject *object = [self backgroundApplicationContextObjectForEntityName:[aSyncChange objectEntityName] syncIdentifier:[aSyncChange objectSyncID]];
+    TICDSSynchronizedManagedObject *object = (id)[self backgroundApplicationContextObjectForEntityName:[aSyncChange objectEntityName] syncIdentifier:[aSyncChange objectSyncID]];
 
     if( !object ) {
         TICDSLog(TICDSLogVerbosityErrorsOnly, @"Object not found locally for attribute change [%@] %@", aSyncChange, [aSyncChange objectEntityName]);
@@ -807,7 +809,9 @@ - (void)applyAttributeChangeSyncChange:(TICDSSyncChange *)aSyncChange
     TICDSLog(TICDSLogVerbosityManagedObjectOutput, @"[%@] %@", aSyncChange, [aSyncChange objectEntityName]);
 
     [object willChangeValueForKey:[aSyncChange relevantKey]];
-    [object setPrimitiveValue:[aSyncChange changedAttributes] forKey:[aSyncChange relevantKey]];
+    id transformedValue = [aSyncChange changedAttributes];
+    transformedValue = [object reverseTransformedValueOfAttribute:[aSyncChange relevantKey] withValue:transformedValue];
+    [object setPrimitiveValue:transformedValue forKey:[aSyncChange relevantKey]];
     [object didChangeValueForKey:[aSyncChange relevantKey]];
 
     TICDSLog(TICDSLogVerbosityManagedObjectOutput, @"Changed attribute on object: %@", object);

diff --git a/TICoreDataSync/02 Primary Classes/TICDSSynchronizedManagedObject.h b/TICoreDataSync/02 Primary Classes/TICDSSynchronizedManagedObject.h
@@ -28,4 +28,7 @@
 @property (nonatomic, readonly) NSManagedObjectContext *syncChangesMOC;
 @property (nonatomic, readwrite, assign) BOOL excludeFromSync;
 
+- (id)transformedValueOfAttribute:(NSString *)key;
+- (id)reverseTransformedValueOfAttribute:(NSString *)key withValue:(id)value;
+
 @end
diff --git a/TICoreDataSync/02 Primary Classes/TICDSSynchronizedManagedObject.m b/TICoreDataSync/02 Primary Classes/TICDSSynchronizedManagedObject.m
@@ -67,9 +67,7 @@ - (void)createSyncChangesForChangedProperties
             TICDSLog(TICDSLogVerbosityManagedObjectOutput, @"Not creating a change for %@.%@", [self class], eachPropertyName);
             continue;
         }
-
-        id eachValue = [changedValues valueForKey:eachPropertyName];
-
+
         NSRelationshipDescription *relationship = [[[self entity] relationshipsByName] valueForKey:eachPropertyName];
         NSAttributeDescription *attribute = [[[self entity] attributesByName] valueForKey:eachPropertyName];
         if ( relationship && !relationship.isTransient ) {
@@ -79,6 +77,7 @@ - (void)createSyncChangesForChangedProperties
             TICDSSyncChange *syncChange = [self createSyncChangeForChangeType:TICDSSyncChangeTypeAttributeChanged];
             TICDSLog(TICDSLogVerbosityManagedObjectOutput, @"[%@] %@", syncChange.objectSyncID, [self class]);
             [syncChange setRelevantKey:eachPropertyName];
+            id eachValue = [self transformedValueOfAttribute:eachPropertyName];
             [syncChange setChangedAttributes:eachValue];
         }
     }
@@ -216,14 +215,36 @@ - (void)createToManyRelationshipSyncChanges:(NSRelationshipDescription *)aRelati
 }
 
 #pragma mark -
-#pragma mark Dictionaries
+#pragma mark Attributes
+- (id)transformedValueOfAttribute:(NSString *)key
+{
+    NSAttributeDescription *attribute = [self.entity.attributesByName valueForKey:key];
+    NSString *transformerName = [attribute valueTransformerName];
+    NSValueTransformer *valueTransformer = ( transformerName ? [NSValueTransformer valueTransformerForName:transformerName] : nil );
+    id transformedValue = [self valueForKey:key];
+    if ( valueTransformer ) transformedValue = [valueTransformer transformedValue:transformedValue];
+    return transformedValue;
+}
+
+- (id)reverseTransformedValueOfAttribute:(NSString *)key withValue:(id)value
+{
+    NSAttributeDescription *attribute = [self.entity.attributesByName valueForKey:key];
+    NSString *transformerName = [attribute valueTransformerName];
+    NSValueTransformer *valueTransformer = ( transformerName ? [NSValueTransformer valueTransformerForName:transformerName] : nil );
+    if ( valueTransformer ) value = [valueTransformer reverseTransformedValue:value];
+    return value;
+}
+
 - (NSDictionary *)dictionaryOfAllAttributes
 {
     NSDictionary *objectAttributeNames = [[self entity] attributesByName];
 
     NSMutableDictionary *attributeValues = [NSMutableDictionary dictionaryWithCapacity:[objectAttributeNames count]];
     for( NSString *eachAttributeName in [objectAttributeNames allKeys] ) {
-        [attributeValues setValue:[self valueForKey:eachAttributeName] forKey:eachAttributeName];
+        NSAttributeDescription *attribute = [objectAttributeNames valueForKey:eachAttributeName];
+        if ( [attribute isTransient] ) continue;
+        id value = [self transformedValueOfAttribute:eachAttributeName];
+        [attributeValues setValue:value forKey:eachAttributeName];
     }
 
     return attributeValues;