mods/atsocial_iphone_app/TouchJSON/JSON/CJSONSerializer.m

   1 //
   2 //  CJSONSerializer.m
   3 //  TouchJSON
   4 //
   5 //  Created by Jonathan Wight on 12/07/2005.
   6 //  Copyright 2005 Toxic Software. All rights reserved.
   7 //
   8
   9 #import "CJSONSerializer.h"
  10
  11 @implementation CJSONSerializer
  12
  13 + (id)serializer
  14 {
  15 return([[[self alloc] init] autorelease]);
  16 }
  17
  18 - (NSString *)serializeObject:(id)inObject;
  19 {
  20 NSString *theResult = @"";
  21
  22 if ([inObject isKindOfClass:[NSNull class]])
  23         {
  24         theResult = [self serializeNull:inObject];
  25         }
  26 else if ([inObject isKindOfClass:[NSNumber class]])
  27         {
  28         theResult = [self serializeNumber:inObject];
  29         }
  30 else if ([inObject isKindOfClass:[NSString class]])
  31         {
  32         theResult = [self serializeString:inObject];
  33         }
  34 else if ([inObject isKindOfClass:[NSArray class]])
  35         {
  36         theResult = [self serializeArray:inObject];
  37         }
  38 else if ([inObject isKindOfClass:[NSDictionary class]])
  39         {
  40         theResult = [self serializeDictionary:inObject];
  41         }
  42 else if ([inObject isKindOfClass:[NSData class]])
  43         {
  44         NSString *theString = [[[NSString alloc] initWithData:inObject encoding:NSUTF8StringEncoding] autorelease];
  45         theResult = [self serializeString:theString];
  46         }
  47 else
  48         {
  49         [NSException raise:NSGenericException format:@"Cannot serialize data of type '%@'", NSStringFromClass([inObject class])];
  50         }
  51 if (theResult == NULL)
  52         [NSException raise:NSGenericException format:@"Could not serialize object '%@'", inObject];
  53 return(theResult);
  54 }
  55
  56 - (NSString *)serializeNull:(NSNull *)inNull
  57 {
  58 #pragma unused (inNull)
  59 return(@"null");
  60 }
  61
  62 - (NSString *)serializeNumber:(NSNumber *)inNumber
  63 {
  64 NSString *theResult = NULL;
  65 switch (CFNumberGetType((CFNumberRef)inNumber))
  66         {
  67         case kCFNumberCharType:
  68                 {
  69                 int theValue = [inNumber intValue];
  70                 if (theValue == 0)
  71                         theResult = @"false";
  72                 else if (theValue == 1)
  73                         theResult = @"true";
  74                 else
  75                         theResult = [inNumber stringValue];
  76                 }
  77                 break;
  78         case kCFNumberSInt8Type:
  79         case kCFNumberSInt16Type:
  80         case kCFNumberSInt32Type:
  81         case kCFNumberSInt64Type:
  82         case kCFNumberFloat32Type:
  83         case kCFNumberFloat64Type:
  84         case kCFNumberShortType:
  85         case kCFNumberIntType:
  86         case kCFNumberLongType:
  87         case kCFNumberLongLongType:
  88         case kCFNumberFloatType:
  89         case kCFNumberDoubleType:
  90         case kCFNumberCFIndexType:
  91         default:
  92                 theResult = [inNumber stringValue];
  93                 break;
  94         }
  95 return(theResult);
  96 }
  97
  98 - (NSString *)serializeString:(NSString *)inString
  99 {
 100 NSMutableString *theMutableCopy = [[inString mutableCopy] autorelease];
 101 [theMutableCopy replaceOccurrencesOfString:@"\\" withString:@"\\\\" options:0 range:NSMakeRange(0, [theMutableCopy length])];
 102 [theMutableCopy replaceOccurrencesOfString:@"\"" withString:@"\\\"" options:0 range:NSMakeRange(0, [theMutableCopy length])];
 103 [theMutableCopy replaceOccurrencesOfString:@"/" withString:@"\\/" options:0 range:NSMakeRange(0, [theMutableCopy length])];
 104 [theMutableCopy replaceOccurrencesOfString:@"\b" withString:@"\\b" options:0 range:NSMakeRange(0, [theMutableCopy length])];
 105 [theMutableCopy replaceOccurrencesOfString:@"\f" withString:@"\\f" options:0 range:NSMakeRange(0, [theMutableCopy length])];
 106 [theMutableCopy replaceOccurrencesOfString:@"\n" withString:@"\\n" options:0 range:NSMakeRange(0, [theMutableCopy length])];
 107 [theMutableCopy replaceOccurrencesOfString:@"\n" withString:@"\\n" options:0 range:NSMakeRange(0, [theMutableCopy length])];
 108 [theMutableCopy replaceOccurrencesOfString:@"\t" withString:@"\\t" options:0 range:NSMakeRange(0, [theMutableCopy length])];
 109 /*
 110                         case 'u':
 111                                 {
 112                                 theCharacter = 0;
 113
 114                                 int theShift;
 115                                 for (theShift = 12; theShift >= 0; theShift -= 4)
 116                                         {
 117                                         int theDigit = HexToInt([self scanCharacter]);
 118                                         if (theDigit == -1)
 119                                                 {
 120                                                 [self setScanLocation:theScanLocation];
 121                                                 return(NO);
 122                                                 }
 123                                         theCharacter |= (theDigit << theShift);
 124                                         }
 125                                 }
 126 */
 127 return([NSString stringWithFormat:@"\"%@\"", theMutableCopy]);
 128 }
 129
 130 - (NSString *)serializeArray:(NSArray *)inArray
 131 {
 132 NSMutableString *theString = [NSMutableString string];
 133
 134 NSEnumerator *theEnumerator = [inArray objectEnumerator];
 135 id theValue = NULL;
 136 while ((theValue = [theEnumerator nextObject]) != NULL)
 137         {
 138         [theString appendString:[self serializeObject:theValue]];
 139         if (theValue != [inArray lastObject])
 140                 [theString appendString:@","];
 141         }
 142 return([NSString stringWithFormat:@"[%@]", theString]);
 143 }
 144
 145 - (NSString *)serializeDictionary:(NSDictionary *)inDictionary
 146 {
 147 NSMutableString *theString = [NSMutableString string];
 148
 149 NSArray *theKeys = [inDictionary allKeys];
 150 NSEnumerator *theEnumerator = [theKeys objectEnumerator];
 151 NSString *theKey = NULL;
 152 while ((theKey = [theEnumerator nextObject]) != NULL)
 153         {
 154         id theValue = [inDictionary valueForKey:theKey];
 155
 156         [theString appendFormat:@"%@:%@", [self serializeString:theKey], [self serializeObject:theValue]];
 157         if (theKey != [theKeys lastObject])
 158                 [theString appendString:@","];
 159         }
 160 return([NSString stringWithFormat:@"{%@}", theString]);
 161 }
 162
 163 @end