Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
MessageExpressionEvaluator |
|
| 9.333333333333334;9.333 |
1 | /* | |
2 | * $Id: MessageExpressionEvaluator.java 12067 2008-06-16 13:53:26Z dirk.olmes $ | |
3 | * -------------------------------------------------------------------------------------- | |
4 | * Copyright (c) MuleSource, Inc. All rights reserved. http://www.mulesource.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.util.expression; | |
12 | ||
13 | import org.mule.api.ExceptionPayload; | |
14 | import org.mule.api.MuleMessage; | |
15 | import org.mule.api.transport.MessageAdapter; | |
16 | import org.mule.util.StringUtils; | |
17 | ||
18 | import org.apache.commons.logging.Log; | |
19 | import org.apache.commons.logging.LogFactory; | |
20 | ||
21 | /** | |
22 | * Returns properties on the MuleMessage itself. The supported expressions map directly to methods on the message. | |
23 | * For example: | |
24 | * <ul> | |
25 | * <li>id - returns the value of {@link org.mule.api.MuleMessage#getUniqueId()}</li> | |
26 | * <li>correlationId - returns the value of {@link org.mule.api.MuleMessage#getCorrelationId()}</li> | |
27 | * <li>correlationGroupSize - returns the value of {@link org.mule.api.MuleMessage#getCorrelationGroupSize()}</li> | |
28 | * <li>correlationSequence - returns the value of {@link org.mule.api.MuleMessage#getCorrelationSequence()}</li> | |
29 | * <li>replyTo - returns the value of {@link org.mule.api.MuleMessage#getReplyTo()}</li> | |
30 | * <li>payload - returns the value of {@link org.mule.api.MuleMessage#getPayload()}</li> | |
31 | * <li>encoding - returns the value of {@link org.mule.api.MuleMessage#getEncoding()}</li> | |
32 | * <li>exception - returns the value of {@link org.mule.api.MuleMessage#getExceptionPayload().getException()} or null if there is no exception payload</li> | |
33 | * </ul> | |
34 | * If no expression is set the MuleMessage itself will be returned. | |
35 | * <p/> | |
36 | * If the object passed in is not a MuleMessage, the same object will be returned. | |
37 | * | |
38 | * @see org.mule.util.expression.ExpressionEvaluator | |
39 | * @see org.mule.util.expression.ExpressionEvaluatorManager | |
40 | */ | |
41 | 1148 | public class MessageExpressionEvaluator implements ExpressionEvaluator |
42 | { | |
43 | public static final String NAME = "message"; | |
44 | ||
45 | /** | |
46 | * logger used by this class | |
47 | */ | |
48 | 1148 | protected transient final Log logger = LogFactory.getLog(MessagePayloadExpressionEvaluator.class); |
49 | ||
50 | public Object evaluate(String expression, Object message) | |
51 | { | |
52 | 56 | if (message instanceof MuleMessage) |
53 | { | |
54 | 52 | if (StringUtils.isEmpty(expression)) |
55 | { | |
56 | 2 | return message; |
57 | } | |
58 | else | |
59 | { | |
60 | 50 | if (expression.equals("id")) |
61 | { | |
62 | 18 | return ((MuleMessage) message).getUniqueId(); |
63 | } | |
64 | 32 | else if (expression.equals("correlationId")) |
65 | { | |
66 | 4 | return ((MuleMessage) message).getCorrelationId(); |
67 | } | |
68 | 28 | else if (expression.equals("correlationSequence")) |
69 | { | |
70 | 4 | return new Integer(((MuleMessage) message).getCorrelationSequence()); |
71 | } | |
72 | 24 | else if (expression.equals("correlationGroupSize")) |
73 | { | |
74 | 4 | return new Integer(((MuleMessage) message).getCorrelationGroupSize()); |
75 | } | |
76 | 20 | else if (expression.equals("replyTo")) |
77 | { | |
78 | 4 | return ((MuleMessage) message).getReplyTo(); |
79 | } | |
80 | 16 | else if (expression.equals("payload")) |
81 | { | |
82 | 4 | return ((MuleMessage) message).getPayload(); |
83 | } | |
84 | 12 | else if (expression.equals("encoding")) |
85 | { | |
86 | 4 | return ((MuleMessage) message).getEncoding(); |
87 | } | |
88 | 8 | else if (expression.equals("exception")) |
89 | { | |
90 | 4 | ExceptionPayload ep = ((MuleMessage) message).getExceptionPayload(); |
91 | 4 | if (ep != null) |
92 | { | |
93 | 4 | return ep.getException(); |
94 | } | |
95 | 0 | return null; |
96 | } | |
97 | else | |
98 | { | |
99 | 4 | throw new IllegalArgumentException(expression); |
100 | } | |
101 | ||
102 | } | |
103 | } | |
104 | else | |
105 | { | |
106 | 4 | logger.warn("Message is not of type MuleMessage, the expression will return the object without modification"); |
107 | 4 | if (message instanceof MessageAdapter) |
108 | { | |
109 | 0 | return ((MessageAdapter) message).getPayload(); |
110 | } | |
111 | } | |
112 | 4 | return message; |
113 | ||
114 | } | |
115 | ||
116 | /** | |
117 | * {@inheritDoc} | |
118 | */ | |
119 | public String getName() | |
120 | { | |
121 | 1146 | return NAME; |
122 | } | |
123 | ||
124 | /** | |
125 | * {@inheritDoc} | |
126 | */ | |
127 | public void setName(String name) | |
128 | { | |
129 | 0 | throw new UnsupportedOperationException("setName"); |
130 | } | |
131 | } |