root / trunk / UppercaseStringValueTransformer.m

/*
 *  $Id$
 *
 *  Copyright (C) 2005, 2006 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 "UppercaseStringValueTransformer.h"

@implementation UppercaseStringValueTransformer

+ (Class)       transformedValueClass                           { return [NSString class]; }
+ (BOOL)        allowsReverseTransformation                     { return YES; }
- (id)          reverseTransformedValue:(id)value       { return value; }

- (id) transformedValue:(id)value;
{
        if(nil == value) {
                return nil;             
        }
        
        if(NO == [value isKindOfClass:[NSString class]]) {
                @throw [NSException exceptionWithName:@"NSInternalInconsistencyException" reason:@"Value was not NSString." userInfo:nil];
        }
        
        return [value uppercaseString];
}

@end