First pass at replacing RKManagedObjectCache with a more flexible block approach that leverages the new resource path pattern matching approach to registering objectMappings.

Code/CoreData/RKObjectMappingProvider+CoreData.h

@@ -0,0 +1,54 @@
+//
+//  RKObjectMappingProvider+CoreData.h
+//  RestKit
+//
+//  Created by Jeff Arena on 1/26/12.
+//  Copyright (c) 2012 RestKit. All rights reserved.
+//
+
+#import "RKObjectMappingProvider.h"
+#import <CoreData/CoreData.h>
+
+typedef NSFetchRequest *(^RKObjectMappingProviderFetchRequestBlock)(NSString *resourcePath);
+
+/**
+ Provides extensions to RKObjectMappingProvider to support Core Data specific
+ functionality.
+ */
+@interface RKObjectMappingProvider (CoreData)
+
+/**
+ Configures an object mapping to be used when during a load event where the resourcePath of
+ the RKObjectLoader instance matches resourcePathPattern.
+
+ The resourcePathPattern is a SOCKit pattern matching property names preceded by colons within
+ a path. For example, if a collection of reviews for a product were loaded from a remote system
+ at the resourcePath @"/products/1234/reviews", object mapping could be configured to handle
+ this request with a resourcePathPattern of @"/products/:productID/reviews".
+
+ **NOTE** that care must be taken when configuring patterns within the provider. The patterns
+ will be evaluated in the order they are added to the provider, so more specific patterns must
+ precede more general patterns where either would generate a match.
+
+ @param objectMapping The object mapping to use when the resourcePath matches the specified
+ resourcePathPattern.
+ @param resourcePathPattern A pattern to be evaluated using an RKPathMatcher against a resourcePath
+ to determine if objectMapping is the appropriate mapping.
+ @param fetchRequestBlock A block that accepts an individual resourcePath and returns an NSFetchRequest
+ that should be used to fetch the local objects associated with resourcePath from CoreData, for use in
+ properly processing local deletes
+ @see RKPathMatcher
+ @see RKURL
+ @see RKObjectLoader
+ */
+- (void)setObjectMapping:(RKObjectMappingDefinition *)objectMapping forResourcePathPattern:(NSString *)resourcePathPattern withFetchRequestBlock:(RKObjectMappingProviderFetchRequestBlock)fetchRequestBlock;
+
+/**
+ Retrieves the NSFetchRequest object that will retrieve cached objects for a given resourcePath.
+ 
+ @param resourcePath A resourcePath to retrieve the fetch request for.
+ @return An NSFetchRequest object for fetching objects for the given resource path or nil.
+ */
+- (NSFetchRequest *)fetchRequestForResourcePath:(NSString *)resourcePath;
+
+@end