//
// CJSONSerializer.m
// TouchCode
//
// Created by Jonathan Wight on 12/07/2005.
// Copyright 2005 toxicsoftware.com. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
#import "CJSONSerializer.h"
#import "JSONRepresentation.h"
static NSData *kNULL = NULL;
static NSData *kFalse = NULL;
static NSData *kTrue = NULL;
@implementation CJSONSerializer
+ (void)initialize
{
NSAutoreleasePool *thePool = [[NSAutoreleasePool alloc] init];
if (self == [CJSONSerializer class])
{
if (kNULL == NULL)
kNULL = [[NSData alloc] initWithBytesNoCopy:(void *)"null" length:4 freeWhenDone:NO];
if (kFalse == NULL)
kFalse = [[NSData alloc] initWithBytesNoCopy:(void *)"false" length:5 freeWhenDone:NO];
if (kTrue == NULL)
kTrue = [[NSData alloc] initWithBytesNoCopy:(void *)"true" length:4 freeWhenDone:NO];
[thePool release];
}
}
+ (id)serializer
{
return([[[self alloc] init] autorelease]);
}
- (BOOL)isValidJSONObject:(id)inObject
{
if ([inObject isKindOfClass:[NSNull class]])
{
return(YES);
}
else if ([inObject isKindOfClass:[NSNumber class]])
{
return(YES);
}
else if ([inObject isKindOfClass:[NSString class]])
{
return(YES);
}
else if ([inObject isKindOfClass:[NSArray class]])
{
return(YES);
}
else if ([inObject isKindOfClass:[NSDictionary class]])
{
return(YES);
}
else if ([inObject isKindOfClass:[NSData class]])
{
return(YES);
}
else if ([inObject respondsToSelector:@selector(JSONDataRepresentation)])
{
return(YES);
}
else
{
return(NO);
}
}
- (NSData *)serializeObject:(id)inObject error:(NSError **)outError
{
NSData *theResult = NULL;
if ([inObject isKindOfClass:[NSNull class]])
{
theResult = [self serializeNull:inObject error:outError];
}
else if ([inObject isKindOfClass:[NSNumber class]])
{
theResult = [self serializeNumber:inObject error:outError];
}
else if ([inObject isKindOfClass:[NSString class]])
{
theResult = [self serializeString:inObject error:outError];
}
else if ([inObject isKindOfClass:[NSArray class]])
{
theResult = [self serializeArray:inObject error:outError];
}
else if ([inObject isKindOfClass:[NSDictionary class]])
{
theResult = [self serializeDictionary:inObject error:outError];
}
else if ([inObject isKindOfClass:[NSData class]])
{
NSString *theString = [[[NSString alloc] initWithData:inObject encoding:NSUTF8StringEncoding] autorelease];
theResult = [self serializeString:theString error:outError];
}
else if ([inObject respondsToSelector:@selector(JSONDataRepresentation)])
{
theResult = [inObject JSONDataRepresentation];
}
else
{
if (outError)
{
NSDictionary *theUserInfo = [NSDictionary dictionaryWithObjectsAndKeys:
[NSString stringWithFormat:@"Cannot serialize data of type '%@'", NSStringFromClass([inObject class])], NSLocalizedDescriptionKey,
NULL];
*outError = [NSError errorWithDomain:@"TODO_DOMAIN" code:CJSONSerializerErrorCouldNotSerializeDataType userInfo:theUserInfo];
}
return(NULL);
}
if (theResult == NULL)
{
if (outError)
{
NSDictionary *theUserInfo = [NSDictionary dictionaryWithObjectsAndKeys:
[NSString stringWithFormat:@"Could not serialize object '%@'", inObject], NSLocalizedDescriptionKey,
NULL];
*outError = [NSError errorWithDomain:@"TODO_DOMAIN" code:CJSONSerializerErrorCouldNotSerializeObject userInfo:theUserInfo];
}
return(NULL);
}
return(theResult);
}
- (NSData *)serializeNull:(NSNull *)inNull error:(NSError **)outError
{
#pragma unused (inNull, outError)
return(kNULL);
}
- (NSData *)serializeNumber:(NSNumber *)inNumber error:(NSError **)outError
{
#pragma unused (outError)
NSData *theResult = NULL;
switch (CFNumberGetType((CFNumberRef)inNumber))
{
case kCFNumberCharType:
{
int theValue = [inNumber intValue];
if (theValue == 0)
theResult = kFalse;
else if (theValue == 1)
theResult = kTrue;
else
theResult = [[inNumber stringValue] dataUsingEncoding:NSASCIIStringEncoding];
}
break;
case kCFNumberFloat32Type:
case kCFNumberFloat64Type:
case kCFNumberFloatType:
case kCFNumberDoubleType:
case kCFNumberSInt8Type:
case kCFNumberSInt16Type:
case kCFNumberSInt32Type:
case kCFNumberSInt64Type:
case kCFNumberShortType:
case kCFNumberIntType:
case kCFNumberLongType:
case kCFNumberLongLongType:
case kCFNumberCFIndexType:
default:
theResult = [[inNumber stringValue] dataUsingEncoding:NSASCIIStringEncoding];
break;
}
return(theResult);
}
- (NSData *)serializeString:(NSString *)inString error:(NSError **)outError
{
#pragma unused (outError)
const char *theUTF8String = [inString UTF8String];
NSMutableData *theData = [NSMutableData dataWithLength:strlen(theUTF8String) * 2 + 2];
char *theOutputStart = [theData mutableBytes];
char *OUT = theOutputStart;
*OUT++ = '"';
for (const char *IN = theUTF8String; IN && *IN != '\0'; ++IN)
{
switch (*IN)
{
case '\\':
{
*OUT++ = '\\';
*OUT++ = '\\';
}
break;
case '\"':
{
*OUT++ = '\\';
*OUT++ = '\"';
}
break;
case '/':
{
*OUT++ = '\\';
*OUT++ = '/';
}
break;
case '\b':
{
*OUT++ = '\\';
*OUT++ = 'b';
}
break;
case '\f':
{
*OUT++ = '\\';
*OUT++ = 'f';
}
break;
case '\n':
{
*OUT++ = '\\';
*OUT++ = 'n';
}
break;
case '\r':
{
*OUT++ = '\\';
*OUT++ = 'r';
}
break;
case '\t':
{
*OUT++ = '\\';
*OUT++ = 't';
}
break;
default:
{
*OUT++ = *IN;
}
break;
}
}
*OUT++ = '"';
theData.length = OUT - theOutputStart;
return(theData);
}
- (NSData *)serializeArray:(NSArray *)inArray error:(NSError **)outError
{
NSMutableData *theData = [NSMutableData data];
[theData appendBytes:"[" length:1];
NSEnumerator *theEnumerator = [inArray objectEnumerator];
id theValue = NULL;
NSUInteger i = 0;
while ((theValue = [theEnumerator nextObject]) != NULL)
{
NSData *theValueData = [self serializeObject:theValue error:outError];
if (theValueData == NULL)
{
return(NULL);
}
[theData appendData:theValueData];
if (++i < [inArray count])
[theData appendBytes:"," length:1];
}
[theData appendBytes:"]" length:1];
return(theData);
}
- (NSData *)serializeDictionary:(NSDictionary *)inDictionary error:(NSError **)outError
{
NSMutableData *theData = [NSMutableData data];
[theData appendBytes:"{" length:1];
NSArray *theKeys = [inDictionary allKeys];
NSEnumerator *theEnumerator = [theKeys objectEnumerator];
NSString *theKey = NULL;
while ((theKey = [theEnumerator nextObject]) != NULL)
{
id theValue = [inDictionary objectForKey:theKey];
NSData *theKeyData = [self serializeString:theKey error:outError];
if (theKeyData == NULL)
{
return(NULL);
}
NSData *theValueData = [self serializeObject:theValue error:outError];
if (theValueData == NULL)
{
return(NULL);
}
[theData appendData:theKeyData];
[theData appendBytes:":" length:1];
[theData appendData:theValueData];
if (theKey != [theKeys lastObject])
[theData appendData:[@"," dataUsingEncoding:NSASCIIStringEncoding]];
}
[theData appendBytes:"}" length:1];
return(theData);
}
@end