1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.el;
18
19 import javax.servlet.jsp.el.ELException;
20 import javax.servlet.jsp.el.FunctionMapper;
21 import javax.servlet.jsp.el.VariableResolver;
22
23 /**
24 *
25 * <p>Represents an element that can appear as a suffix in a complex
26 * value, such as a property or index operator, or a method call (should
27 * they ever need to be supported).
28 *
29 * @author Nathan Abramson - Art Technology Group
30 * @author Shawn Bayern
31 * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: bayard $
32 **/
33
34 public abstract class ValueSuffix
35 {
36 //-------------------------------------
37 /**
38 *
39 * Returns the expression in the expression language syntax
40 **/
41 public abstract String getExpressionString ();
42
43 //-------------------------------------
44 /**
45 *
46 * Evaluates the expression in the given context, operating on the
47 * given value.
48 **/
49 public abstract Object evaluate (Object pValue,
50 VariableResolver pResolver,
51 FunctionMapper functions)
52 throws ELException;
53
54 public abstract ValueSuffix bindFunctions(FunctionMapper functions)
55 throws ELException;
56
57 //-------------------------------------
58 }