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>Represents an operator that obtains the value of another value's
026 * property.  This is a specialization of ArraySuffix - a.b is
027 * equivalent to a["b"]
028 * 
029 * @author Nathan Abramson - Art Technology Group
030 * @author Shawn Bayern
031 * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: bayard $
032 **/
033
034public class PropertySuffix
035  extends ArraySuffix
036{
037  //-------------------------------------
038  // Properties
039  //-------------------------------------
040  // property name
041
042  String mName;
043  public String getName ()
044  { return mName; }
045  public void setName (String pName)
046  { mName = pName; }
047
048  //-------------------------------------
049  /**
050   *
051   * Constructor
052   **/
053  public PropertySuffix (String pName)
054  {
055    super (null);
056    mName = pName;
057  }
058
059  //-------------------------------------
060  /**
061   *
062   * Gets the value of the index
063   **/
064  Object evaluateIndex (VariableResolver pResolver, FunctionMapper functions)
065    throws ELException
066  {
067    return mName;
068  }
069
070  //-------------------------------------
071  /**
072   *
073   * Returns the operator symbol
074   **/
075  String getOperatorSymbol ()
076  {
077    return ".";
078  }
079
080  //-------------------------------------
081  // ValueSuffix methods
082  //-------------------------------------
083  /**
084   *
085   * Returns the expression in the expression language syntax
086   **/
087  public String getExpressionString ()
088  {
089    return "." + StringLiteral.toIdentifierToken (mName);
090  }
091
092  //-------------------------------------
093}