zxing/iphone/legacy/Barcodes_original/Classes/ResultParser.m
2010-11-14 15:56:00 +00:00

79 lines
2.1 KiB
Objective-C

//
// 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"
@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 {
#ifdef DEBUG
NSLog(@"parsing result:\n<<<\n%@\n>>>\n", s);
#endif
// Make the parser of last resort the last parser we try.
NSMutableArray *resultParsers =
[NSMutableArray arrayWithArray:[[self resultParsers] allObjects]];
NSUInteger textIndex =
[resultParsers indexOfObject:NSClassFromString(@"TextResultParser")];
if (NSNotFound != textIndex) {
// If it is present, make sure it is last.
[resultParsers exchangeObjectAtIndex:textIndex
withObjectAtIndex:[resultParsers count] - 1];
}
for (Class c in resultParsers) {
#ifdef DEBUG
NSLog(@"trying %@", NSStringFromClass(c));
#endif
ParsedResult *result = [c parsedResultForString:s];
if (result != nil) {
#ifdef DEBUG
NSLog(@"parsed as %@ %@", NSStringFromClass([result class]), result);
#endif
return result;
}
}
return nil;
}
@end