/*
 *  $Id$
 *
 *  Copyright (C) 2005 - 2007 Stephen F. Booth <me@sbooth.org>
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#import "NegateBooleanArrayValueTransformer.h"

@implementation NegateBooleanArrayValueTransformer

+ (Class)	transformedValueClass			{ return [NSNumber class]; }
+ (BOOL)	allowsReverseTransformation		{ return NO; }

- (id) transformedValue:(id) value;
{
	BOOL result = YES;
	
	if(nil == value) {
		return nil;		
	}
	
	if([value isKindOfClass:[NSArray class]]) {
		unsigned i;
		for(i = 0; i < [value count]; ++i) {
			if(NO == [[value objectAtIndex:i] isEqual:[NSNull null]] && [[value objectAtIndex:i] boolValue]) {
				result = NO;
				break;
			}
		}
	} 
	else {
		@throw [NSException exceptionWithName:@"NSInternalInconsistencyException" reason:@"Value was not NSArray." userInfo:nil];
	}
	
	return [NSNumber numberWithBool: result];
}

@end