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74 lines
3.1 KiB
Objective-C
74 lines
3.1 KiB
Objective-C
//
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// RKObjectUtilities.m
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// RestKit
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//
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// Created by Blake Watters on 9/30/12.
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// Copyright (c) 2012 RestKit. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#import <objc/message.h>
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#import "RKObjectUtilities.h"
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BOOL RKObjectIsEqualToObject(id object, id anotherObject) {
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NSCAssert(object, @"Expected object not to be nil");
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NSCAssert(anotherObject, @"Expected anotherObject not to be nil");
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SEL comparisonSelector;
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if ([object isKindOfClass:[NSString class]] && [anotherObject isKindOfClass:[NSString class]]) {
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comparisonSelector = @selector(isEqualToString:);
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} else if ([object isKindOfClass:[NSNumber class]] && [anotherObject isKindOfClass:[NSNumber class]]) {
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comparisonSelector = @selector(isEqualToNumber:);
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} else if ([object isKindOfClass:[NSDate class]] && [anotherObject isKindOfClass:[NSDate class]]) {
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comparisonSelector = @selector(isEqualToDate:);
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} else if ([object isKindOfClass:[NSArray class]] && [anotherObject isKindOfClass:[NSArray class]]) {
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comparisonSelector = @selector(isEqualToArray:);
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} else if ([object isKindOfClass:[NSDictionary class]] && [anotherObject isKindOfClass:[NSDictionary class]]) {
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comparisonSelector = @selector(isEqualToDictionary:);
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} else if ([object isKindOfClass:[NSSet class]] && [anotherObject isKindOfClass:[NSSet class]]) {
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comparisonSelector = @selector(isEqualToSet:);
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} else {
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comparisonSelector = @selector(isEqual:);
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}
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// Comparison magic using function pointers. See this page for details: http://www.red-sweater.com/blog/320/abusing-objective-c-with-class
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// Original code courtesy of Greg Parker
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// This is necessary because isEqualToNumber will return negative integer values that aren't coercable directly to BOOL's without help [sbw]
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BOOL (*ComparisonSender)(id, SEL, id) = (BOOL (*)(id, SEL, id))objc_msgSend;
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return ComparisonSender(object, comparisonSelector, anotherObject);
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}
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BOOL RKClassIsCollection(Class aClass)
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{
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return (aClass && ([aClass isSubclassOfClass:[NSSet class]] ||
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[aClass isSubclassOfClass:[NSArray class]] ||
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[aClass isSubclassOfClass:[NSOrderedSet class]]));
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}
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BOOL RKObjectIsCollection(id object)
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{
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return RKClassIsCollection([object class]);
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}
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BOOL RKObjectIsCollectionContainingOnlyManagedObjects(id object)
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{
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if (! RKObjectIsCollection(object)) return NO;
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Class managedObjectClass = NSClassFromString(@"NSManagedObject");
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if (! managedObjectClass) return NO;
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for (id instance in object) {
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if (! [object isKindOfClass:managedObjectClass]) return NO;
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}
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return YES;
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}
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