//
//  NilToEmptyStringTransformer.m
//  TikZiT
//  
//  Copyright 2011 Aleks Kissinger. All rights reserved.
//  
//  
//  This file is part of TikZiT.
//  
//  TikZiT 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 3 of the License, or
//  (at your option) any later version.
//  
//  TikZiT 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 TikZiT.  If not, see <http://www.gnu.org/licenses/>.
//  

#import "NilToEmptyStringTransformer.h"

@implementation NilToEmptyStringTransformer

- (id)init {
    [super init];
    return self;
}

+ (Class)transformedValueClass {
    return [NSString class];
}

+ (BOOL)allowsReverseTransformation {
    return YES;
}

- (id)transformedValue:(id)value {
    if (value == nil) {
        return @"";
    } else {
        return value;
    }
}

- (id)reverseTransformedValue:(id)value {
    return [self transformedValue:value];
}

@end