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//
// 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
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