xy.reflect.ui.undo.AbstractModification Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (C) 2018 OTK Software
*
* This program 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.
*
* This program 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.
*
* The GNU General Public License allows you also to freely redistribute
* the libraries under the same license, if you provide the terms of the
* GNU General Public License with them and add the following
* copyright notice at the appropriate place (with a link to
* http://javacollection.net/reflectionui/ web site when possible).
******************************************************************************/
package xy.reflect.ui.undo;
public abstract class AbstractModification implements IModification {
protected String title;
protected Runnable doJob;
protected Runnable undoJob;
protected static final String UNDO_TITLE_PREFIX = "(Revert) ";
protected abstract Runnable createDoJob();
protected abstract Runnable createUndoJob();
@Override
public boolean isNull() {
return false;
}
@Override
public IModification applyAndGetOpposite() {
if (doJob == null) {
doJob = createDoJob();
}
if (undoJob == null) {
undoJob = createUndoJob();
}
doJob.run();
return new OppositeModification();
}
@Override
public String toString() {
return "Modification [title=" + getTitle() + "]";
}
public static String getUndoTitle(String title) {
String result;
if (title == null) {
result = null;
} else if (title.startsWith(AbstractModification.UNDO_TITLE_PREFIX)) {
result = title.substring(AbstractModification.UNDO_TITLE_PREFIX.length());
} else {
result = AbstractModification.UNDO_TITLE_PREFIX + title;
}
return result;
}
public class OppositeModification implements IModification {
@Override
public boolean isNull() {
return false;
}
@Override
public String getTitle() {
return AbstractModification.getUndoTitle(AbstractModification.this.getTitle());
}
public AbstractModification getSourceModification() {
return AbstractModification.this;
}
@Override
public IModification applyAndGetOpposite() {
undoJob.run();
return getSourceModification();
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + getSourceModification().hashCode();
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
OppositeModification other = (OppositeModification) obj;
if (!getSourceModification().equals(other.getSourceModification()))
return false;
return true;
}
@Override
public String toString() {
return "OppositeModification [soure=" + getSourceModification() + "]";
}
}
}