1 files changed, 171 insertions, 0 deletions
diff --git a/SBJsonStreamParserAdapter.m b/SBJsonStreamParserAdapter.m
new file mode 100755
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--- /dev/null
+++ b/SBJsonStreamParserAdapter.m
@@ -0,0 +1,171 @@
+/*
+ Copyright (c) 2010, Stig Brautaset.
+ All rights reserved.
+ 
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+ 
+   Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+  
+   Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+ 
+   Neither the name of the the author nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+ 
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import "SBJsonStreamParserAdapter.h"
+
+@interface SBJsonStreamParserAdapter ()
+
+- (void)pop;
+- (void)parser:(SBJsonStreamParser*)parser found:(id)obj;
+
+@end
+
+
+
+@implementation SBJsonStreamParserAdapter
+
+@synthesize delegate;
+@synthesize levelsToSkip;
+
+#pragma mark Housekeeping
+
+- (id)init {
+	self = [super init];
+	if (self) {
+		keyStack = [[NSMutableArray alloc] initWithCapacity:32];
+		stack = [[NSMutableArray alloc] initWithCapacity:32];
+		
+		currentType = SBJsonStreamParserAdapterNone;
+	}
+	return self;
+}	
+
+- (void)dealloc {
+	[keyStack release];
+	[stack release];
+	[super dealloc];
+}
+
+#pragma mark Private methods
+
+- (void)pop {
+	[stack removeLastObject];
+	array = nil;
+	dict = nil;
+	currentType = SBJsonStreamParserAdapterNone;
+	
+	id value = [stack lastObject];
+	
+	if ([value isKindOfClass:[NSArray class]]) {
+		array = value;
+		currentType = SBJsonStreamParserAdapterArray;
+	} else if ([value isKindOfClass:[NSDictionary class]]) {
+		dict = value;
+		currentType = SBJsonStreamParserAdapterObject;
+	}
+}
+
+- (void)parser:(SBJsonStreamParser*)parser found:(id)obj {
+	NSParameterAssert(obj);
+	
+	switch (currentType) {
+		case SBJsonStreamParserAdapterArray:
+			[array addObject:obj];
+			break;
+
+		case SBJsonStreamParserAdapterObject:
+			NSParameterAssert(keyStack.count);
+			[dict setObject:obj forKey:[keyStack lastObject]];
+			[keyStack removeLastObject];
+			break;
+			
+		case SBJsonStreamParserAdapterNone:
+			if ([obj isKindOfClass:[NSArray class]]) {
+				[delegate parser:parser foundArray:obj];
+			} else {
+				[delegate parser:parser foundObject:obj];
+			}				
+			break;
+
+		default:
+			break;
+	}
+}
+
+
+#pragma mark Delegate methods
+
+- (void)parserFoundObjectStart:(SBJsonStreamParser*)parser {
+	if (++depth > levelsToSkip) {
+		dict = [[NSMutableDictionary new] autorelease];
+		[stack addObject:dict];
+		currentType = SBJsonStreamParserAdapterObject;
+	}
+}
+
+- (void)parser:(SBJsonStreamParser*)parser foundObjectKey:(NSString*)key_ {
+	[keyStack addObject:key_];
+}
+
+- (void)parserFoundObjectEnd:(SBJsonStreamParser*)parser {
+	if (depth-- > levelsToSkip) {
+		id value = [dict retain];
+		[self pop];
+		[self parser:parser found:value];
+		[value release];
+	}
+}
+
+- (void)parserFoundArrayStart:(SBJsonStreamParser*)parser {
+	if (++depth > levelsToSkip) {
+		array = [[NSMutableArray new] autorelease];
+		[stack addObject:array];
+		currentType = SBJsonStreamParserAdapterArray;
+	}
+}
+
+- (void)parserFoundArrayEnd:(SBJsonStreamParser*)parser {
+	if (depth-- > levelsToSkip) {
+		id value = [array retain];
+		[self pop];
+		[self parser:parser found:value];
+		[value release];
+	}
+}
+
+- (void)parser:(SBJsonStreamParser*)parser foundBoolean:(BOOL)x {
+	[self parser:parser found:[NSNumber numberWithBool:x]];
+}
+
+- (void)parserFoundNull:(SBJsonStreamParser*)parser {
+	[self parser:parser found:[NSNull null]];
+}
+
+- (void)parser:(SBJsonStreamParser*)parser foundNumber:(NSNumber*)num {
+	[self parser:parser found:num];
+}
+
+- (void)parser:(SBJsonStreamParser*)parser foundString:(NSString*)string {
+	[self parser:parser found:string];
+}
+
+@end