zxing/iphone/ZXingWidget/Classes/resultParsers/ResultParser.m

113 lines
3.3 KiB
Mathematica
Raw Normal View History

//
// ResultParser.m
// ZXing
//
// Created by Christian Brunschen on 25/06/2008.
/*
* Copyright 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "ResultParser.h"
#import "TextResultParser.h"
@interface ResultParser(Private)
+ (NSString *)urlDecode:(NSString *)str;
@end
@implementation ResultParser
static NSMutableSet *sResultParsers = nil;
+ (void)registerResultParserClass:(Class)resultParser {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
@synchronized(self) {
if (!sResultParsers) {
sResultParsers = [[NSMutableSet alloc] init];
}
[sResultParsers addObject:resultParser];
}
[pool drain];
}
+ (NSSet *)resultParsers {
NSSet *resultParsers = nil;
@synchronized(self) {
resultParsers = [[sResultParsers copy] autorelease];
}
return resultParsers;
}
+ (ParsedResult *)parsedResultForString:(NSString *)s
format:(BarcodeFormat)barcodeFormat {
#ifdef DEBUG
NSLog(@"parsing result:\n<<<\n%@\n>>>\n", s);
#endif
for (Class c in [self resultParsers]) {
#ifdef DEBUG
NSLog(@"trying %@", NSStringFromClass(c));
#endif
ParsedResult *result = [c parsedResultForString:s format:barcodeFormat];
if (result != nil) {
#ifdef DEBUG
NSLog(@"parsed as %@ %@", NSStringFromClass([result class]), result);
#endif
return result;
}
}
#ifdef DEBUG
NSLog(@"No result parsers matched. Falling back to text.");
#endif
return [TextResultParser parsedResultForString:s format:barcodeFormat];
}
+ (ParsedResult *)parsedResultForString:(NSString *)s {
return [ResultParser parsedResultForString:s format:BarcodeFormat_None];
}
+ (NSDictionary*)dictionaryForQueryString:(NSString *)queryString {
NSMutableDictionary *result = [NSMutableDictionary dictionary];
NSArray *keyValuePairs = [queryString componentsSeparatedByString:@"&"];
for (NSString *kvp in keyValuePairs) {
NSRange equals = [kvp rangeOfString:@"="];
if (equals.location != NSNotFound) {
NSString *key =
[kvp substringWithRange:NSMakeRange(0, equals.location)];
NSUInteger i = equals.location + 1;
NSString *value =
[kvp substringWithRange:NSMakeRange(i, [kvp length] - i)];
[result setObject:[self urlDecode:value]
forKey:[self urlDecode:key]];
}
}
return result;
}
@end
@implementation ResultParser(Private)
+ (NSString *)urlDecode:(NSString *)str {
// Obj-C's url decoder does everything except + to space conversion.
NSString *result = [str stringByReplacingOccurrencesOfString:@"+"
withString:@" "];
return [result stringByReplacingPercentEscapesUsingEncoding:
NSUTF8StringEncoding];
}
@end