NSMutableDictionaryOOExtensions.m

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/*
 
NSMutableDictionaryOOExtensions.m
 
Oolite
Copyright (C) 2004-2013 Giles C Williams and contributors
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
 
*/
 
#import <Foundation/Foundation.h>
#import "NSMutableDictionaryOOExtensions.h"
 
@implementation NSMutableDictionary (OOExtensions)
 
- (void)mergeEntriesFromDictionary:(NSDictionary *)otherDictionary
{
    NSEnumerator    *otherKeysEnum = nil;
    id              key = nil;
     
    for (otherKeysEnum = [otherDictionary keyEnumerator]; (key = [otherKeysEnum nextObject]); )
    {
        if (![self objectForKey:key])
            [self setObject:[otherDictionary objectForKey:key] forKey:key];
        else
        {
            BOOL merged = NO;
            id thisObject = [self objectForKey:key];
            id otherObject = [otherDictionary objectForKey:key];
            
            if ([thisObject isKindOfClass:[NSDictionary class]]&&[otherObject isKindOfClass:[NSDictionary class]]&&(![thisObject isEqual:otherObject]))
            {
                NSMutableDictionary* mergeObject = [NSMutableDictionary dictionaryWithDictionary:(NSDictionary*)thisObject];
                [mergeObject mergeEntriesFromDictionary:(NSDictionary*)otherObject];
                [self setObject:mergeObject forKey:key];
                merged = YES;
            }
            
            if ([thisObject isKindOfClass:[NSArray class]]&&[otherObject isKindOfClass:[NSArray class]]&&(![thisObject isEqual:otherObject]))
            {
                NSMutableArray* mergeObject = [NSMutableArray arrayWithArray:(NSArray*)thisObject];
                [mergeObject addObjectsFromArray:(NSArray*)otherObject];
                [self setObject:mergeObject forKey:key];
                merged = YES;
            }
            
            if (!merged)
                [self setObject:otherObject forKey:key];
        }
    }   
}
- (void)mergeEntriesFromDictionary:(NSDictionary *)otherDictionary {…}
 
@end