01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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.bpmscript.jbi;
18:
19: import javax.jbi.messaging.MessageExchange;
20: import javax.jbi.messaging.MessagingException;
21: import javax.jbi.messaging.NormalizedMessage;
22:
23: import org.apache.servicemix.expression.Expression;
24: import org.mozilla.javascript.Context;
25: import org.mozilla.javascript.Script;
26: import org.mozilla.javascript.Scriptable;
27: import org.mozilla.javascript.ScriptableObject;
28:
29: public class JsExpression implements Expression {
30:
31: private Script script;
32:
33: public JsExpression(String expression) {
34: Context cx = Context.enter();
35: try {
36: script = cx
37: .compileString(expression, "expression", 0, null);
38: } finally {
39: Context.exit();
40: }
41: }
42:
43: public Object evaluate(MessageExchange exchange,
44: NormalizedMessage in) throws MessagingException {
45: Context cx = Context.enter();
46: try {
47: Scriptable scope = cx.initStandardObjects();
48: ScriptableObject.putProperty(scope, "exchange", Context
49: .javaToJS(exchange, scope));
50: ScriptableObject.putProperty(scope, "in", Context.javaToJS(
51: in, scope));
52: script.exec(cx, scope);
53: } finally {
54: Context.exit();
55: }
56: return null;
57: }
58:
59: }
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