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Java > Open Source Codes > org > jboss > ejb > plugins > cmp > jdbc > metadata > JDBCValueClassMetaData


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2005, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.ejb.plugins.cmp.jdbc.metadata;
23
24 import java.util.ArrayList JavaDoc;
25 import java.util.Collections JavaDoc;
26 import java.util.Iterator JavaDoc;
27 import java.util.List JavaDoc;
28 import org.jboss.deployment.DeploymentException;
29 import org.jboss.metadata.MetaData;
30 import org.w3c.dom.Element JavaDoc;
31
32 /**
33  * Imutable class which holds a list of the properties for a dependent value
34  * class.
35  *
36  * @author <a HREF="mailto:dain@daingroup.com">Dain Sundstrom</a>
37  * @version $Revision: 37459 $
38  */
39 public final class JDBCValueClassMetaData {
40    private final Class JavaDoc javaType;
41    private final List JavaDoc properties;
42
43    /**
44     * Constructs a value class metadata class with the data contained in
45     * the dependent-value-class xml element from a jbosscmp-jdbc xml file.
46     *
47     * @param classElement the xml Element which contains the metadata about
48     * this value class
49     * @param classLoader the ClassLoader which is used to load this value class
50     * @throws DeploymentException if the xml element is not semantically correct
51     */
52    public JDBCValueClassMetaData(Element JavaDoc classElement, ClassLoader JavaDoc classLoader) throws DeploymentException {
53       String JavaDoc className = MetaData.getUniqueChildContent(classElement, "class");
54       try {
55          javaType = classLoader.loadClass(className);
56       } catch (ClassNotFoundException JavaDoc e) {
57          throw new DeploymentException("dependent-value-class not found: " + className);
58       }
59       
60       List JavaDoc propertyList = new ArrayList JavaDoc();
61       Iterator JavaDoc iterator = MetaData.getChildrenByTagName(classElement, "property");
62       while(iterator.hasNext()) {
63          Element JavaDoc propertyElement = (Element JavaDoc)iterator.next();
64       
65          propertyList.add(new JDBCValuePropertyMetaData(propertyElement, javaType));
66       }
67       properties = Collections.unmodifiableList(propertyList);
68    }
69
70    /**
71     * Gets the Java Class of this value class.
72     *
73     * @return the java Class of this value class
74     */
75    public Class JavaDoc getJavaType() {
76       return javaType;
77    }
78
79    /**
80     * Gets the properties of this value class which are to be saved into the database.
81     *
82     * @return an unmodifiable list which contains the JDBCValuePropertyMetaData objects
83     */
84    public List JavaDoc getProperties() {
85       return properties;
86    }
87 }
88
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