001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.el;
018
019import javax.servlet.jsp.el.ELException;
020import javax.servlet.jsp.el.FunctionMapper;
021import javax.servlet.jsp.el.VariableResolver;
022
023/**
024 *
025 * <p>An expression representing a literal value
026 * 
027 * @author Nathan Abramson - Art Technology Group
028 * @author Shawn Bayern
029 * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: bayard $
030 **/
031
032public abstract class Literal
033  extends Expression
034{
035  //-------------------------------------
036  // Properties
037  //-------------------------------------
038  // property value
039
040  Object mValue;
041  public Object getValue ()
042  { return mValue; }
043  public void setValue (Object pValue)
044  { mValue = pValue; }
045
046  //-------------------------------------
047  /**
048   *
049   * Constructor
050   **/
051  public Literal (Object pValue)
052  {
053    mValue = pValue;
054  }
055
056  //-------------------------------------
057  // Expression methods
058  //-------------------------------------
059  /**
060   *
061   * Evaluates to the literal value
062   **/
063  public Object evaluate (VariableResolver pResolver, FunctionMapper functions)
064    throws ELException
065  {
066    return mValue;
067  }
068
069  public Expression bindFunctions(FunctionMapper functions) throws ELException {
070      return this;
071  }
072   
073
074  //-------------------------------------
075}