JSON automatic parser

gistfile1.m

//
//  JSONParser.m
//  BusaoSP
//
//  Created by Diego Chohfi on 4/12/12.
//  Copyright (c) 2012 None. All rights reserved.
//

#import "JSONParser.h"
#import <objc/runtime.h>
@implementation JSONParser

+ (id) parseJson: (NSDictionary *) json forClass: (Class) class{
    #pragma clang diagnostic push
    #pragma clang diagnostic ignored "-Warc-performSelector-leaks"
    NSObject *object = [[class alloc] init];
    NSArray *keys = [json allKeys];
    for (NSString *key in keys) {
        id<NSObject> value = [json valueForKey:key];
        if ([value isKindOfClass:[NSArray class]]) {
            continue;
        }else{
            objc_property_t property = class_getProperty(class, [key UTF8String]);
            if (property) {
                if([value isKindOfClass:[NSDictionary class]]){
                    NSString *className = [NSString stringWithUTF8String:getPropertyType(property)];
                    value = [self parseJson:(NSDictionary *) value forClass:NSClassFromString(className)];
                }
                NSError *error;
                if([object validateValue:&value forKey:key error:&error]){
                    [object setValue:value forKey:key];
                }
            }
        }
    }
    #pragma clang diagnostic pop
    return object;
}

static const char *getPropertyType(objc_property_t property) {
    const char *attributes = property_getAttributes(property);
    char buffer[1 + strlen(attributes)];
    strcpy(buffer, attributes);
    char *state = buffer, *attribute;
    while ((attribute = strsep(&state, ",")) != NULL) {
        if (attribute[0] == 'T') {
            return (const char *)[[NSData dataWithBytes:(attribute + 3) length:strlen(attribute) - 4] bytes];
        }
    }
    return "@";
}

@end