Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ExpressionEvaluator |
|
| 1.0;1 |
1 | /* | |
2 | * $Id: ExpressionEvaluator.java 19191 2010-08-25 21:05:23Z tcarlson $ | |
3 | * -------------------------------------------------------------------------------------- | |
4 | * Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com | |
5 | * | |
6 | * The software in this package is published under the terms of the CPAL v1.0 | |
7 | * license, a copy of which has been included with this distribution in the | |
8 | * LICENSE.txt file. | |
9 | */ | |
10 | ||
11 | package org.mule.api.expression; | |
12 | ||
13 | import org.mule.api.MuleMessage; | |
14 | import org.mule.api.NamedObject; | |
15 | ||
16 | /** | |
17 | * <code>ExpressionEvaluator</code> extracts a property from the message in a generic | |
18 | * way. i.e. composite properties can be pulled and aggregated depending on this | |
19 | * strategy. This can be used to extract Correlation Ids, Message Ids etc. | |
20 | * | |
21 | * These objects are used to execute property expressions (usually on the | |
22 | * current message) at runtime to extracta dynamic value. | |
23 | */ | |
24 | public interface ExpressionEvaluator extends NamedObject | |
25 | { | |
26 | /** | |
27 | * Extracts a single property from the message | |
28 | * | |
29 | * @param expression the property expression or expression | |
30 | * @param message the message to extract from | |
31 | * @return the result of the extraction or null if the property was not found | |
32 | */ | |
33 | Object evaluate(String expression, MuleMessage message); | |
34 | ||
35 | } |