/*
 Oaxaca: Useful Cocoa Library
 Copyright (C) 2005, Niko Matsakis (niko@alum.mit.edu)
 
 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 "OACount1.h"


@implementation OACount1

+ (Class) transfomedValueClass
{
    return [NSNumber class];
}

+ (BOOL) allowsReverseTransformation
{
    return NO;
}

- (id)transformedValue:(id)value
{
    if (![value respondsToSelector:@selector(count)]) {
        [NSException raise:@"BadValue" 
                    format:@"%@ of type %@ does not respond to selector(count)", value, [value class]];
    }
    return [NSNumber numberWithBool:[value count] == 1];
}

@end
