/*

  * 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.el;

 import javax.servlet.jsp.el.ELException;

 import javax.servlet.jsp.el.FunctionMapper;

 import javax.servlet.jsp.el.VariableResolver;

 /**

  *

  * <p>Represents a name that can be used as the first element of a

  * value.

  * 

  * @author Nathan Abramson - Art Technology Group

  * @author Shawn Bayern

  * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: bayard $

  **/

 public class NamedValue

   extends Expression

 {

   //-------------------------------------

   // Constants

   //-------------------------------------

   //-------------------------------------

   // Properties

   //-------------------------------------

   // property name

   String mName;

   public String getName ()

   { return mName; }

   //-------------------------------------

   /**

    *

    * Constructor

    **/

   public NamedValue (String pName)

   {

     mName = pName;

   }

   //-------------------------------------

   // Expression methods

   //-------------------------------------

   /**

    *

    * Returns the expression in the expression language syntax

    **/

   public String getExpressionString ()

   {

     return StringLiteral.toIdentifierToken (mName);

   }

   //-------------------------------------

   /**

    *

    * Evaluates by looking up the name in the VariableResolver

    **/

   public Object evaluate (VariableResolver pResolver, FunctionMapper functions)

     throws ELException

   {

     if (pResolver == null) {

       return null;

     }

     else {

       return pResolver.resolveVariable (mName);

     }

   }

   public Expression bindFunctions(FunctionMapper functions) throws ELException {

       return this;

   }

   //-------------------------------------

 }