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Java > Open Source Codes > org > apache > servicemix > components > script > ScriptExpression


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.components.script;
18
19 import org.apache.servicemix.expression.Expression;
20
21 import javax.jbi.messaging.MessageExchange;
22 import javax.jbi.messaging.NormalizedMessage;
23 import javax.jbi.messaging.MessagingException;
24 import javax.script.CompiledScript;
25 import javax.script.ScriptContext;
26 import javax.script.ScriptException;
27
28 /**
29  * An {@link Expression} implementation using
30  * <a HREF="http://servicemix.org/JSR+223">JSR 223</a> to allow any scripting language to be used as an expression
31  * language.
32  *
33  * @version $Revision: 426415 $
34  */
35 public class ScriptExpression implements Expression {
36     private CompiledScript compiledScript;
37
38     public Object JavaDoc evaluate(MessageExchange exchange, NormalizedMessage message) throws MessagingException {
39         try {
40              /** TODO */
41             ScriptContext namespace = null;
42             return compiledScript.eval(namespace);
43         }
44         catch (ScriptException e) {
45             throw new MessagingException(e);
46         }
47     }
48 }
49
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