Add request descriptor class

Code/ObjectMapping/RKRequestDescriptor.m

@@ -0,0 +1,36 @@
+//
+//  RKRequestDescriptor.m
+//  RestKit
+//
+//  Created by Blake Watters on 8/24/12.
+//  Copyright (c) 2012 RestKit. All rights reserved.
+//
+
+#import "RKRequestDescriptor.h"
+
+@interface RKRequestDescriptor ()
+
+@property (nonatomic, strong, readwrite) RKMapping *mapping;
+@property (nonatomic, strong, readwrite) Class objectClass;
+@property (nonatomic, copy, readwrite) NSString *rootKeyPath;
+
+@end
+
+@implementation RKRequestDescriptor
+
++ (id)requestDescriptorWithMapping:(RKMapping *)mapping objectClass:(Class)objectClass rootKeyPath:(NSString *)rootKeyPath
+{
+    RKRequestDescriptor *requestDescriptor = [self new];
+    requestDescriptor.mapping = mapping;
+    requestDescriptor.objectClass = objectClass;
+    requestDescriptor.rootKeyPath = rootKeyPath;
+    return requestDescriptor;
+}
+
+- (NSString *)description
+{
+    return [NSString stringWithFormat:@"<%@: %p objectClass=%@ rootKeyPath=%@ : %@>",
+            NSStringFromClass([self class]), self, NSStringFromClass(self.objectClass), self.rootKeyPath, self.mapping];
+}
+
+@end