/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.utility.diff;
import org.eclipse.persistence.tools.workbench.utility.io.IndentingPrintWriter;
/**
* A diff for when there is no difference between the two objects.
*/
public class NullDiff implements Diff {
private final Object object1;
private final Object object2;
private final Differentiator differentiator;
public NullDiff(Object object1, Object object2, Differentiator differentiator) {
super();
this.object1 = object1;
this.object2 = object2;
this.differentiator = differentiator;
}
/**
* @see Diff#getObject1()
*/
public Object getObject1() {
return this.object1;
}
/**
* @see Diff#getObject2()
*/
public Object getObject2() {
return this.object2;
}
/**
* @see Diff#identical()
*/
public boolean identical() {
return true;
}
/**
* @see Diff#different()
*/
public boolean different() {
return false;
}
/**
* @see Diff#getDifferentiator()
*/
public Differentiator getDifferentiator() {
return this.differentiator;
}
/**
* @see Diff#getDescription()
*/
public String getDescription() {
return "";
}
/**
* @see Diff#appendDescription(org.eclipse.persistence.tools.workbench.utility.io.IndentingPrintWriter)
*/
public void appendDescription(IndentingPrintWriter pw) {
// nothing to describe
}
/**
* @see Object#toString()
*/
public String toString() {
return NO_DIFFERENCE_DESCRIPTION;
}
}