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Copy pathDelta.java
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136 lines (119 loc) · 3.8 KB
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/*
Copyright 2009 Dmitry Naumenko (dm.naumenko@gmail.com)
This file is part of Java Diff Utills Library.
Java Diff Utills Library 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.
Java Diff Utills Library 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 Java Diff Utills Library. If not, see <http://www.gnu.org/licenses/>.
*/
package difflib;
import java.util.*;
/**
* Describes the delta between original and revised texts.
*
* @author <a href="dm.naumenko@gmail.com">Dmitry Naumenko</a>
*/
public abstract class Delta {
private Chunk original;
private Chunk revised;
/**
* Construct the delta for original and revised chunks
*
* @param original chunk describes the original text
* @param revised chunk describes the revised text
*/
public Delta(Chunk original, Chunk revised) {
this.original = original;
this.revised = revised;
}
/**
* Verifies that this delta can be used to patch the given text.
*
* @param target the text to patch.
* @throws PatchFailedException if the patch cannot be applied.
*/
public abstract void verify(List<?> target) throws PatchFailedException;
/**
* Applies this delta as the patch for a given target
*
* @param target the given target
* @throws PatchFailedException
*/
public abstract void applyTo(List<Object> target) throws PatchFailedException;
/**
* Cancel this delta for a given revised text. The action is opposite to
* patch.
*
* @param target the given revised text
*/
public abstract void restore(List<Object> target);
/**
* @return the Chunk describing the original text
*/
public Chunk getOriginal() {
return original;
}
/**
* @param original the Chunk describing the original text to set
*/
public void setOriginal(Chunk original) {
this.original = original;
}
/**
* @return the Chunk describing the revised text
*/
public Chunk getRevised() {
return revised;
}
/**
* @param revised the Chunk describing the revised text to set
*/
public void setRevised(Chunk revised) {
this.revised = revised;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((original == null) ? 0 : original.hashCode());
result = prime * result + ((revised == null) ? 0 : revised.hashCode());
return result;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Delta other = (Delta) obj;
if (original == null) {
if (other.original != null)
return false;
} else if (!original.equals(other.original))
return false;
if (revised == null) {
if (other.revised != null)
return false;
} else if (!revised.equals(other.revised))
return false;
return true;
}
}