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VS2DMatrixToStringTransformer.m
58 lines (50 loc) · 2.3 KB
/
VS2DMatrixToStringTransformer.m
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/*********************************************************************************
* The MIT License (MIT)
*
* Copyright (c) 2009-2016 Jason Neuswanger
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
***********************************************************************************/
#import "VS2DMatrixToStringTransformer.h"
@implementation VS2DMatrixToStringTransformer
+ (Class)transformedValueClass { return [NSString class]; }
+ (BOOL)allowsReverseTransformation { return NO; }
- (id)transformedValue:(id)value {
if (value == nil) {
return nil;
} else {
NSMutableString *fullString = [NSMutableString new];
NSMutableString *rowString;
NSNumberFormatter *nf = [[NSNumberFormatter alloc] init];
[nf setFormatterBehavior:NSNumberFormatterBehavior10_4];
[nf setNumberStyle:NSNumberFormatterScientificStyle];
[nf setUsesSignificantDigits:YES];
[nf setMaximumSignificantDigits:5];
[nf setPositivePrefix:@" "];
[nf setPositiveSuffix:@" "];
[nf setNegativeSuffix:@" "];
for (NSArray *row in value) {
rowString = [NSMutableString new];
for (NSNumber *num in row) [rowString appendString:[nf stringFromNumber:num]];
[fullString appendFormat:@"%@\n",rowString];
}
return fullString;
}
}
@end