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//
// DictionaryHelper.m
// IOSBoilerplate
//
// Copyright (c) 2011 Alberto Gimeno Brieba
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//

#import "DictionaryHelper.h"

@implementation NSDictionary (helper)

- (NSString*) stringForKey:(id)key {
id s = [self objectForKey:key];
if (s == [NSNull null] || ![s isKindOfClass:[NSString class]]) {
return nil;
}
return s;
}

- (NSNumber*) numberForKey:(id)key {
id s = [self objectForKey:key];
if (s == [NSNull null] || ![s isKindOfClass:[NSNumber class]]) {
return nil;
}
return s;
}

- (NSMutableDictionary*) dictionaryForKey:(id)key {
id s = [self objectForKey:key];
if (s == [NSNull null] || ![s isKindOfClass:[NSMutableDictionary class]]) {
return nil;
}
return s;
}

- (NSMutableArray*) arrayForKey:(id)key {
id s = [self objectForKey:key];
if (s == [NSNull null] || ![s isKindOfClass:[NSMutableArray class]]) {
return nil;
}
return s;
}


@end
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