/*

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.List;

/**

* Describes the change-delta between original and revised texts.

*

* @author <a href="dm.naumenko@gmail.com">Dmitry Naumenko</a>

*/

public class ChangeDelta extends Delta {

/**

* {@inheritDoc}

*/

public ChangeDelta(Chunk original, Chunk revised) {

super(original, revised);

}

/**

* {@inheritDoc}

*

* @throws PatchFailedException

*/

@Override

public void applyTo(List<Object> target) throws PatchFailedException {

verify(target);

int position = getOriginal().getPosition();

int size = getOriginal().getSize();

for (int i = 0; i < size; i++) {

target.remove(position);

}

int i = 0;

for (Object line : getRevised().getLines()) {

target.add(position + i, line);

i++;

}

}

/**

* {@inheritDoc}

*/

@Override

public void restore(List<Object> target) {

int position = getRevised().getPosition();

int size = getRevised().getSize();

for (int i = 0; i < size; i++) {

target.remove(position);

}

int i = 0;

for (Object line : getOriginal().getLines()) {

target.add(position + i, line);

i++;

}

}

/**

* {@inheritDoc}

*/

public void verify(List<?> target) throws PatchFailedException {

getOriginal().verify(target);

if (getOriginal().getPosition() > target.size()) {

throw new PatchFailedException("Incorrect patch for delta: "

+ "delta original position > target size");

}

}

}