/* * 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); } }