mirror of
https://github.com/zhigang1992/RestKit.git
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105 lines
3.3 KiB
Objective-C
105 lines
3.3 KiB
Objective-C
//
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// RKObjectPropertyInspector.m
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// RestKit
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//
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// Created by Blake Watters on 3/4/10.
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// Copyright 2010 Two Toasters. All rights reserved.
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//
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#import <objc/message.h>
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#import "RKObjectPropertyInspector.h"
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#import "RKLog.h"
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// Set Logging Component
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#undef RKLogComponent
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#define RKLogComponent lcl_cRestKitObjectMapping
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static RKObjectPropertyInspector* sharedInspector = nil;
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@implementation RKObjectPropertyInspector
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+ (RKObjectPropertyInspector*)sharedInspector {
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if (sharedInspector == nil) {
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sharedInspector = [RKObjectPropertyInspector new];
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}
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return sharedInspector;
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}
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- (id)init {
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if ((self = [super init])) {
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_cachedPropertyNamesAndTypes = [[NSMutableDictionary alloc] init];
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}
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return self;
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}
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- (void)dealloc {
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[_cachedPropertyNamesAndTypes release];
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[super dealloc];
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}
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- (NSString*)propertyTypeFromAttributeString:(NSString*)attributeString {
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NSString *type = [NSString string];
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NSScanner *typeScanner = [NSScanner scannerWithString:attributeString];
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[typeScanner scanUpToCharactersFromSet:[NSCharacterSet characterSetWithCharactersInString:@"@"] intoString:NULL];
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// we are not dealing with an object
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if([typeScanner isAtEnd]) {
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return @"NULL";
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}
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[typeScanner scanCharactersFromSet:[NSCharacterSet characterSetWithCharactersInString:@"\"@"] intoString:NULL];
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// this gets the actual object type
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[typeScanner scanUpToCharactersFromSet:[NSCharacterSet characterSetWithCharactersInString:@"\""] intoString:&type];
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return type;
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}
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- (NSDictionary *)propertyNamesAndTypesForClass:(Class)class {
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NSMutableDictionary* propertyNames = [_cachedPropertyNamesAndTypes objectForKey:class];
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if (propertyNames) {
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return propertyNames;
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}
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propertyNames = [NSMutableDictionary dictionary];
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//include superclass properties
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Class currentClass = class;
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while (currentClass != nil) {
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// Get the raw list of properties
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unsigned int outCount;
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objc_property_t *propList = class_copyPropertyList(currentClass, &outCount);
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// Collect the property names
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int i;
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NSString *propName;
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for (i = 0; i < outCount; i++) {
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// property_getAttributes() returns everything we need to implement this...
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// See: http://developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtPropertyIntrospection.html#//apple_ref/doc/uid/TP40008048-CH101-SW5
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objc_property_t* prop = propList + i;
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NSString* attributeString = [NSString stringWithCString:property_getAttributes(*prop) encoding:NSUTF8StringEncoding];
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propName = [NSString stringWithCString:property_getName(*prop) encoding:NSUTF8StringEncoding];
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if (![propName isEqualToString:@"_mapkit_hasPanoramaID"]) {
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const char* className = [[self propertyTypeFromAttributeString:attributeString] cStringUsingEncoding:NSUTF8StringEncoding];
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Class class = objc_getClass(className);
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if (class) {
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[propertyNames setObject:class forKey:propName];
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}
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}
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}
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free(propList);
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currentClass = [currentClass superclass];
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}
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[_cachedPropertyNamesAndTypes setObject:propertyNames forKey:class];
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RKLogDebug(@"Cached property names and types for Class '%@': %@", NSStringFromClass(class), propertyNames);
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return propertyNames;
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}
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- (Class)typeForProperty:(NSString*)propertyName ofClass:(Class)objectClass {
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NSDictionary* dictionary = [self propertyNamesAndTypesForClass:objectClass];
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return [dictionary objectForKey:propertyName];
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}
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@end
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