1 /***
2 * Copyright 2004 The Apache Software Foundation.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.apache.commons.jelly.tags.jaxme;
17
18 import java.io.File;
19 import java.io.IOException;
20
21 import javax.xml.bind.UnmarshallerHandler;
22 import javax.xml.bind.Unmarshaller;
23 import javax.xml.bind.JAXBException;
24 import javax.xml.bind.JAXBContext;
25
26 import org.apache.commons.jelly.TagSupport;
27 import org.apache.commons.jelly.XMLOutput;
28 import org.apache.commons.jelly.MissingAttributeException;
29 import org.apache.commons.jelly.JellyTagException;
30
31 import org.apache.ws.jaxme.generator.Generator;
32 import org.apache.ws.jaxme.generator.SchemaReader;
33 import org.apache.ws.jaxme.generator.sg.impl.JAXBSchemaReader;
34 import org.apache.ws.jaxme.generator.sg.SchemaSG;
35 import org.apache.ws.jaxme.generator.impl.GeneratorImpl;
36
37 import org.xml.sax.SAXException;
38
39 /***
40 * <p>Unmarshalls xml documents into java objects.</p>
41 * <p>
42 * This tag unmarshalls the xml content contained
43 * into the JaxMe generated java objects in the packages specified.
44 * </p>
45 *
46 * @author <a href="mailto:joe@ispsoft.de">Jochen Wiedmann</a>
47 * @author <a href="mailto:commons-dev at jakarta.apache.org">Apache Commons Development Team</a>
48 * @version $Revision: 155420 $
49 */
50 public class UnmarshallTag extends TagSupport {
51
52 private String packages;
53 private String var;
54
55 public String getPackages() {
56 return packages;
57 }
58
59 /***
60 * Defines the generated objects to which the xml should be unmarshalled.
61 */
62 public void setPackages(String packages) {
63 this.packages = packages;
64 }
65
66 public String getVar() {
67 return var;
68 }
69
70 /***
71 * Sets the name of the jelly variable to which
72 * the unmarshalled java object should be bound.
73 */
74 public void setVar(String var) {
75 this.var = var;
76 }
77
78 public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException {
79 if (packages == null) {
80 throw new MissingAttributeException( "packages" );
81 }
82 if ( var == null ) {
83 throw new MissingAttributeException( "var" );
84 }
85 try {
86
87 JAXBContext jaxbContext = JAXBContext.newInstance(packages);
88 Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
89 UnmarshallerHandler handler = unmarshaller.getUnmarshallerHandler();
90
91 handler.startDocument();
92
93 XMLOutput newOutput = new XMLOutput( handler );
94
95 invokeBody(newOutput);
96 handler.endDocument();
97
98 Object result = handler.getResult();
99 context.setVariable( var, result );
100
101 } catch (JAXBException ex) {
102 throw new JellyTagException(ex);
103 } catch (SAXException ex) {
104 throw new JellyTagException(ex);
105 }
106
107 }
108 }