Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
MessageSupport |
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| 0.0;0 |
1 | /** |
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2 | * |
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3 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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4 | * contributor license agreements. See the NOTICE file distributed with |
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5 | * this work for additional information regarding copyright ownership. |
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6 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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7 | * (the "License"); you may not use this file except in compliance with |
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8 | * the License. You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | package org.apache.camel.impl; |
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19 | ||
20 | import org.apache.camel.Exchange; |
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21 | import org.apache.camel.Message; |
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22 | import org.apache.camel.util.UuidGenerator; |
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23 | ||
24 | /** |
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25 | * A base class for implementation inheritence providing the core {@link Message} body |
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26 | * handling features but letting the derived class deal with headers. |
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27 | * |
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28 | * Unless a specific provider wishes to do something particularly clever with headers you probably |
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29 | * want to just derive from {@link DefaultMessage} |
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30 | * |
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31 | * @version $Revision: 535124 $ |
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32 | */ |
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33 | 812 | public abstract class MessageSupport implements Message { |
34 | 1 | private static final UuidGenerator defaultIdGenerator = new UuidGenerator(); |
35 | private Exchange exchange; |
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36 | private Object body; |
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37 | 812 | private String messageId = defaultIdGenerator.generateId(); |
38 | ||
39 | ||
40 | public Object getBody() { |
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41 | 197 | if (body == null) { |
42 | 22 | body = createBody(); |
43 | } |
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44 | 197 | return body; |
45 | } |
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46 | ||
47 | @SuppressWarnings({"unchecked"}) |
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48 | public <T> T getBody(Class<T> type) { |
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49 | 65 | Exchange e = getExchange(); |
50 | 65 | if (e != null) { |
51 | 65 | return e.getContext().getTypeConverter().convertTo(type, getBody()); |
52 | } |
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53 | 0 | return (T) getBody(); |
54 | } |
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55 | ||
56 | public void setBody(Object body) { |
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57 | 105 | this.body = body; |
58 | 105 | } |
59 | ||
60 | public <T> void setBody(Object body, Class<T> type) { |
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61 | 0 | Exchange e = getExchange(); |
62 | 0 | if (e != null) { |
63 | 0 | T value = e.getContext().getTypeConverter().convertTo(type, body); |
64 | 0 | if (value != null) { |
65 | 0 | body = value; |
66 | } |
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67 | } |
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68 | 0 | setBody(body); |
69 | 0 | } |
70 | ||
71 | public Message copy() { |
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72 | 24 | Message answer = newInstance(); |
73 | 24 | answer.setMessageId(getMessageId()); |
74 | 24 | answer.setBody(getBody()); |
75 | 24 | answer.getHeaders().putAll(getHeaders()); |
76 | 24 | return answer; |
77 | } |
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78 | ||
79 | public Exchange getExchange() { |
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80 | 77 | return exchange; |
81 | } |
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82 | ||
83 | public void setExchange(Exchange exchange) { |
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84 | 812 | this.exchange = exchange; |
85 | 812 | } |
86 | ||
87 | /** |
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88 | * Returns a new instance |
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89 | * |
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90 | * @return |
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91 | */ |
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92 | public abstract Message newInstance(); |
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93 | ||
94 | ||
95 | /** |
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96 | * A factory method to allow a provider to lazily create the message body for inbound messages from other sources |
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97 | * |
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98 | * @return the value of the message body or null if there is no value available |
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99 | */ |
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100 | protected Object createBody() { |
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101 | 22 | return null; |
102 | } |
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103 | ||
104 | ||
105 | /** |
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106 | * @return the messageId |
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107 | */ |
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108 | public String getMessageId(){ |
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109 | 25 | return this.messageId; |
110 | } |
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111 | ||
112 | ||
113 | /** |
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114 | * @param messageId the messageId to set |
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115 | */ |
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116 | public void setMessageId(String messageId){ |
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117 | 24 | this.messageId=messageId; |
118 | 24 | } |
119 | } |