/*
* 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.
*/
package org.apache.commons.jxpath.ri.compiler;
import org.apache.commons.jxpath.ri.QName;
import org.apache.commons.jxpath.ri.EvalContext;
/**
* An element of the compile tree holding a variable reference.
*
* @author Dmitri Plotnikov
* @version $Revision: 652845 $ $Date: 2008-05-02 12:46:46 -0500 (Fri, 02 May 2008) $
*/
public class VariableReference extends Expression {
private QName varName;
/**
* Create a new VariableReference.
* @param varName variable name
*/
public VariableReference(QName varName) {
this.varName = varName;
}
/**
* Get the variable name.
* @return QName
*/
public QName getVariableName() {
return varName;
}
public String toString() {
return "$" + varName;
}
public boolean isContextDependent() {
return false;
}
public boolean computeContextDependent() {
return false;
}
public Object compute(EvalContext context) {
return computeValue(context);
}
/**
* Returns the value of the variable.
* @param context EvalContext against which to compute the variable's value.
* @return Object
*/
public Object computeValue(EvalContext context) {
return context.getRootContext().getVariableContext(varName);
}
}
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