// Copyright 2012 Georg-August-Universität Göttingen, Germany
//
// 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 de.ugoe.cs.autoquest.tasktrees.nodeequality;
import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskTreeNode;
/**
*
* This comparison rule returns NodeEquality.IDENTICAL
if the comparison of the two
* task tree nodes using the ==
operator or the equals
method return true.
* Else it returns null to denote, that it can not compare the nodes.
*
*
* @version $Revision: $ $Date: 19.02.2012$
* @author 2012, last modified by $Author: patrick$
*/
public class NodeIdentityRule implements NodeComparisonRule {
/* (non-Javadoc)
* @see NodeComparisonRule#isApplicable(ITaskTreeNode, ITaskTreeNode)
*/
@Override
public boolean isApplicable(ITaskTreeNode node1, ITaskTreeNode node2) {
return (node1 == node2);
}
/* (non-Javadoc)
* @see NodeComparisonRule#areLexicallyEqual(ITaskTreeNode, ITaskTreeNode)
*/
@Override
public boolean areLexicallyEqual(ITaskTreeNode node1, ITaskTreeNode node2) {
return (node1 == node2);
}
/* (non-Javadoc)
* @see NodeComparisonRule#areSyntacticallyEqual(ITaskTreeNode, ITaskTreeNode)
*/
@Override
public boolean areSyntacticallyEqual(ITaskTreeNode node1, ITaskTreeNode node2) {
return (node1 == node2);
}
/* (non-Javadoc)
* @see NodeComparisonRule#areSemanticallyEqual(ITaskTreeNode, ITaskTreeNode)
*/
@Override
public boolean areSemanticallyEqual(ITaskTreeNode node1, ITaskTreeNode node2) {
return (node1 == node2);
}
/* (non-Javadoc)
* @see NodeComparisonRule#compare(ITaskTreeNode, ITaskTreeNode)
*/
@Override
public NodeEquality compare(ITaskTreeNode node1, ITaskTreeNode node2) {
if (isApplicable(node1, node2)) {
return NodeEquality.IDENTICAL;
}
else {
return null;
}
}
}