GRLJSON/GRLJSONValueTransformer.m at master · graphiclife/GRLJSON · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
//
//  GRLJSONValueTransformer.m
//  GRLJSON
//
//  Created by Måns Severin on 2010-05-11.
//  Copyright 2010 Graphiclife. All rights reserved.
//

#import "GRLJSONValueTransformer.h"

#import "GRLJSON.h"

@implementation GRLJSONValueTransformer

+ (void)initialize
{
    [NSValueTransformer setValueTransformer:[[[GRLJSONValueTransformer alloc] init] autorelease] forName:@"GRLJSONValueTransformer"];
}

+ (Class)transformedValueClass
{
	return [NSObject class];
}

+ (BOOL)allowsReverseTransformation
{
	return YES;
}

- (id)transformedValue:(id)value
{
	if ( value == nil )
		return nil;

	NSData *result = nil;

	if ( [value conformsToProtocol:@protocol(GRLJSONCoding)] )
	{
		result = [GRLJSON serializeObject:value];
	}
	else if ( [value isKindOfClass:[NSDictionary class]] )
	{
		result = [GRLJSON serializeDictionary:value];
	}
	else if ( [value isKindOfClass:[NSArray class]] )
	{
		result = [GRLJSON serializeArray:value];
	}

	return result;
}

- (id)reverseTransformedValue:(id)value
{
	if ( value == nil )
		return nil;

	if ( ![value isKindOfClass:[NSData class]] )
		return nil;

	NSError *error = nil;
	id		json;

	if ( (json = [GRLJSON deserializeData:value error:&error]) == nil )
	{
		return nil;
	}

	return json;
}

@end