KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > dom4j > jaxb > JAXBSupport


1 /*
2  * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
3  *
4  * This software is open source.
5  * See the bottom of this file for the licence.
6  */
7
8 package org.dom4j.jaxb;
9
10 import java.io.StringReader JavaDoc;
11
12 import javax.xml.bind.JAXBContext;
13 import javax.xml.bind.JAXBException;
14 import javax.xml.bind.Marshaller;
15 import javax.xml.bind.Unmarshaller;
16 import javax.xml.transform.Source JavaDoc;
17 import javax.xml.transform.stream.StreamSource JavaDoc;
18
19 import org.dom4j.dom.DOMDocument;
20
21 /**
22  * DOCUMENT ME!
23  *
24  * @author Wonne Keysers (Realsoftware.be)
25  */
26 abstract class JAXBSupport {
27     private String JavaDoc contextPath;
28
29     private ClassLoader JavaDoc classloader;
30
31     private JAXBContext jaxbContext;
32
33     private Marshaller marshaller;
34
35     private Unmarshaller unmarshaller;
36
37     public JAXBSupport(String JavaDoc contextPath) {
38         this.contextPath = contextPath;
39     }
40
41     public JAXBSupport(String JavaDoc contextPath, ClassLoader JavaDoc classloader) {
42         this.contextPath = contextPath;
43         this.classloader = classloader;
44     }
45
46     /**
47      * Marshals the given {@link javax.xml.bind.Element}in to its DOM4J
48      * counterpart.
49      *
50      * @param element
51      * JAXB Element to be marshalled
52      *
53      * @return the marshalled DOM4J {@link org.dom4j.Element}
54      *
55      * @throws JAXBException
56      * when an error occurs
57      */
58     protected org.dom4j.Element marshal(javax.xml.bind.Element element)
59             throws JAXBException {
60         DOMDocument doc = new DOMDocument();
61         getMarshaller().marshal(element, doc);
62
63         return doc.getRootElement();
64     }
65
66     /**
67      * Unmarshalls the specified DOM4J {@link org.dom4j.Element}into a {@link
68      * javax.xml.bind.Element}
69      *
70      * @param element
71      * the DOM4J element to unmarshall
72      *
73      * @return the unmarshalled JAXB object
74      *
75      * @throws JAXBException
76      * when an error occurs
77      */
78     protected javax.xml.bind.Element unmarshal(org.dom4j.Element element)
79             throws JAXBException {
80         Source JavaDoc source = new StreamSource JavaDoc(new StringReader JavaDoc(element.asXML()));
81
82         return (javax.xml.bind.Element) getUnmarshaller().unmarshal(source);
83     }
84
85     private Marshaller getMarshaller() throws JAXBException {
86         if (marshaller == null) {
87             marshaller = getContext().createMarshaller();
88         }
89
90         return marshaller;
91     }
92
93     private Unmarshaller getUnmarshaller() throws JAXBException {
94         if (unmarshaller == null) {
95             unmarshaller = getContext().createUnmarshaller();
96         }
97
98         return unmarshaller;
99     }
100
101     private JAXBContext getContext() throws JAXBException {
102         if (jaxbContext == null) {
103             if (classloader == null) {
104                 jaxbContext = JAXBContext.newInstance(contextPath);
105             } else {
106                 jaxbContext = JAXBContext.newInstance(contextPath, classloader);
107             }
108         }
109
110         return jaxbContext;
111     }
112 }
113
114 /*
115  * Redistribution and use of this software and associated documentation
116  * ("Software"), with or without modification, are permitted provided that the
117  * following conditions are met:
118  *
119  * 1. Redistributions of source code must retain copyright statements and
120  * notices. Redistributions must also contain a copy of this document.
121  *
122  * 2. Redistributions in binary form must reproduce the above copyright notice,
123  * this list of conditions and the following disclaimer in the documentation
124  * and/or other materials provided with the distribution.
125  *
126  * 3. The name "DOM4J" must not be used to endorse or promote products derived
127  * from this Software without prior written permission of MetaStuff, Ltd. For
128  * written permission, please contact dom4j-info@metastuff.com.
129  *
130  * 4. Products derived from this Software may not be called "DOM4J" nor may
131  * "DOM4J" appear in their names without prior written permission of MetaStuff,
132  * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
133  *
134  * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
135  *
136  * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
137  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
138  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
139  * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
140  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
141  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
142  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
143  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
144  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
145  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
146  * POSSIBILITY OF SUCH DAMAGE.
147  *
148  * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
149  */
150
Popular Tags