com.thebuzzmedia.exiftool.core.StandardFormat Maven / Gradle / Ivy
/**
* Copyright 2011 The Buzz Media, LLC
* Copyright 2015 Mickael Jeanroy
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.thebuzzmedia.exiftool.core;
import com.thebuzzmedia.exiftool.Format;
import java.io.File;
import java.util.Collection;
import java.util.List;
import static java.util.Collections.emptyList;
import static java.util.Collections.singletonList;
/**
* Enum used to define the 2 different output formats that {@link StandardTag}
* values can be returned in: numeric or human-readable text.
*
*
*
* ExifTool, via the -n
command line arg, is capable of returning
* most values in their raw numeric form (e.g. Aperture="2.8010323841") as well
* as a more human-readable/friendly format (e.g. Aperture="2.8").
*
*
*
* If the caller finds the human-readable format easier to process,
* {@link StandardFormat#HUMAN_READABLE} can be specified when calling
* {@link com.thebuzzmedia.exiftool.ExifTool#getImageMeta(File, Format, Collection)}
* and the returned {@link String} values processed manually by the caller.
*
*
*
* In order to see the types of values that are returned when
* {@link StandardFormat#HUMAN_READABLE} is used, you can check the
* comprehensive
*
* ExifTool Tag Guide.
*
*
*
* This makes sense with some values like Aperture that in
* {@link StandardFormat#NUMERIC} format end up returning as 14-decimal-place,
* high precision values that are near the intended value (e.g.
* "2.79999992203711" instead of just returning "2.8"). On the other hand, other
* values (like Orientation) are easier to parse when their numeric value (1-8)
* is returned instead of a much longer friendly name (e.g. "Mirror horizontal
* and rotate 270 CW").
*
* @author Riyad Kalla ([email protected])
* @author Mickael Jeanroy ([email protected])
* @since 1.1
*/
public enum StandardFormat implements Format {
NUMERIC {
@Override
public List getArgs() {
return singletonList("-n");
}
},
HUMAN_READABLE {
@Override
public List getArgs() {
return emptyList();
}
}
}
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