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Java > Open Source Codes > org > apache > servicemix > expression > ConstantExpression


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.servicemix.expression;
18
19 import javax.jbi.messaging.MessageExchange;
20 import javax.jbi.messaging.MessagingException;
21 import javax.jbi.messaging.NormalizedMessage;
22
23 /**
24  * Represents a constant expression
25  *
26  * @version $Revision: 426415 $
27  */
28 public class ConstantExpression implements Expression {
29     private Object JavaDoc value;
30
31     public ConstantExpression(Object JavaDoc value) {
32         this.value = value;
33     }
34
35     public Object JavaDoc evaluate(MessageExchange exchange, NormalizedMessage message) throws MessagingException {
36         return value;
37     }
38 }
39
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