package bboss.org.apache.velocity.runtime.parser.node;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
import bboss.org.apache.velocity.context.InternalContextAdapter;
import bboss.org.apache.velocity.runtime.parser.Parser;
/**
* Handles number addition of nodes.<br><br>
*
* Please look at the Parser.jjt file which is
* what controls the generation of this class.
*
* @author <a href="mailto:wglass@forio.com">Will Glass-Husain</a>
* @author <a href="mailto:pero@antaramusic.de">Peter Romianowski</a>
* @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a>
* @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
* @version $Id: ASTAddNode.java 712887 2008-11-11 00:27:50Z nbubna $
*/
public class ASTAddNode extends ASTMathNode
{
/**
* @param id
*/
public ASTAddNode(int id)
{
super(id);
}
/**
* @param p
* @param id
*/
public ASTAddNode(Parser p, int id)
{
super(p, id);
}
//@Override
protected Object handleSpecial(Object left, Object right, InternalContextAdapter context)
{
/*
* shall we try for strings?
*/
if (left instanceof String || right instanceof String)
{
if (left == null)
{
left = jjtGetChild(0).literal();
}
else if (right == null)
{
right = jjtGetChild(1).literal();
}
return left.toString().concat(right.toString());
}
return null;
}
public Number perform(Number left, Number right, InternalContextAdapter context)
{
return MathUtils.add(left, right);
}
}