Playlist Generator
1.0
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00001 /* 00002 Copyright (c) 2010, Stig Brautaset. 00003 All rights reserved. 00004 00005 Redistribution and use in source and binary forms, with or without 00006 modification, are permitted provided that the following conditions are 00007 met: 00008 00009 Redistributions of source code must retain the above copyright 00010 notice, this list of conditions and the following disclaimer. 00011 00012 Redistributions in binary form must reproduce the above copyright 00013 notice, this list of conditions and the following disclaimer in the 00014 documentation and/or other materials provided with the distribution. 00015 00016 Neither the name of the the author nor the names of its contributors 00017 may be used to endorse or promote products derived from this software 00018 without specific prior written permission. 00019 00020 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 00021 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 00022 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 00023 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 00024 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00025 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00026 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00027 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00028 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00029 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00030 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00031 */ 00032 00033 #import "SBJsonStreamParserAdapter.h" 00034 00035 @interface SBJsonStreamParserAdapter () 00036 00037 - (void)pop; 00038 - (void)parser:(SBJsonStreamParser*)parser found:(id)obj; 00039 00040 @end 00041 00042 00043 00044 @implementation SBJsonStreamParserAdapter 00045 00046 @synthesize delegate; 00047 @synthesize levelsToSkip; 00048 00049 #pragma mark Housekeeping 00050 00051 - (id)init { 00052 self = [super init]; 00053 if (self) { 00054 keyStack = [[NSMutableArray alloc] initWithCapacity:32]; 00055 stack = [[NSMutableArray alloc] initWithCapacity:32]; 00056 00057 currentType = SBJsonStreamParserAdapterNone; 00058 } 00059 return self; 00060 } 00061 00062 00063 #pragma mark Private methods 00064 00065 - (void)pop { 00066 [stack removeLastObject]; 00067 array = nil; 00068 dict = nil; 00069 currentType = SBJsonStreamParserAdapterNone; 00070 00071 id value = [stack lastObject]; 00072 00073 if ([value isKindOfClass:[NSArray class]]) { 00074 array = value; 00075 currentType = SBJsonStreamParserAdapterArray; 00076 } else if ([value isKindOfClass:[NSDictionary class]]) { 00077 dict = value; 00078 currentType = SBJsonStreamParserAdapterObject; 00079 } 00080 } 00081 00082 - (void)parser:(SBJsonStreamParser*)parser found:(id)obj { 00083 NSParameterAssert(obj); 00084 00085 switch (currentType) { 00086 case SBJsonStreamParserAdapterArray: 00087 [array addObject:obj]; 00088 break; 00089 00090 case SBJsonStreamParserAdapterObject: 00091 NSParameterAssert(keyStack.count); 00092 [dict setObject:obj forKey:[keyStack lastObject]]; 00093 [keyStack removeLastObject]; 00094 break; 00095 00096 case SBJsonStreamParserAdapterNone: 00097 if ([obj isKindOfClass:[NSArray class]]) { 00098 [delegate parser:parser foundArray:obj]; 00099 } else { 00100 [delegate parser:parser foundObject:obj]; 00101 } 00102 break; 00103 00104 default: 00105 break; 00106 } 00107 } 00108 00109 00110 #pragma mark Delegate methods 00111 00112 - (void)parserFoundObjectStart:(SBJsonStreamParser*)parser { 00113 if (++depth > self.levelsToSkip) { 00114 dict = [NSMutableDictionary new]; 00115 [stack addObject:dict]; 00116 currentType = SBJsonStreamParserAdapterObject; 00117 } 00118 } 00119 00120 - (void)parser:(SBJsonStreamParser*)parser foundObjectKey:(NSString*)key_ { 00121 [keyStack addObject:key_]; 00122 } 00123 00124 - (void)parserFoundObjectEnd:(SBJsonStreamParser*)parser { 00125 if (depth-- > self.levelsToSkip) { 00126 id value = dict; 00127 [self pop]; 00128 [self parser:parser found:value]; 00129 } 00130 } 00131 00132 - (void)parserFoundArrayStart:(SBJsonStreamParser*)parser { 00133 if (++depth > self.levelsToSkip) { 00134 array = [NSMutableArray new]; 00135 [stack addObject:array]; 00136 currentType = SBJsonStreamParserAdapterArray; 00137 } 00138 } 00139 00140 - (void)parserFoundArrayEnd:(SBJsonStreamParser*)parser { 00141 if (depth-- > self.levelsToSkip) { 00142 id value = array; 00143 [self pop]; 00144 [self parser:parser found:value]; 00145 } 00146 } 00147 00148 - (void)parser:(SBJsonStreamParser*)parser foundBoolean:(BOOL)x { 00149 [self parser:parser found:[NSNumber numberWithBool:x]]; 00150 } 00151 00152 - (void)parserFoundNull:(SBJsonStreamParser*)parser { 00153 [self parser:parser found:[NSNull null]]; 00154 } 00155 00156 - (void)parser:(SBJsonStreamParser*)parser foundNumber:(NSNumber*)num { 00157 [self parser:parser found:num]; 00158 } 00159 00160 - (void)parser:(SBJsonStreamParser*)parser foundString:(NSString*)string { 00161 [self parser:parser found:string]; 00162 } 00163 00164 @end