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Java > Open Source Codes > oracle > toplink > essentials > internal > ejb > cmp3 > xml > accessors > XMLManyToOneAccessor


1 /*
2  * The contents of this file are subject to the terms
3  * of the Common Development and Distribution License
4  * (the "License"). You may not use this file except
5  * in compliance with the License.
6  *
7  * You can obtain a copy of the license at
8  * glassfish/bootstrap/legal/CDDLv1.0.txt or
9  * https://glassfish.dev.java.net/public/CDDLv1.0.html.
10  * See the License for the specific language governing
11  * permissions and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL
14  * HEADER in each file and include the License file at
15  * glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
16  * add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your
18  * own identifying information: Portions Copyright [yyyy]
19  * [name of copyright owner]
20  */
21 // Copyright (c) 1998, 2006, Oracle. All rights reserved.
22 package oracle.toplink.essentials.internal.ejb.cmp3.xml.accessors;
23
24 import oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.objects.MetadataAccessibleObject;
25 import oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.ManyToOneAccessor;
26 import oracle.toplink.essentials.internal.ejb.cmp3.metadata.columns.MetadataJoinColumns;
27
28 import oracle.toplink.essentials.internal.ejb.cmp3.xml.accessors.XMLClassAccessor;
29 import oracle.toplink.essentials.internal.ejb.cmp3.xml.columns.XMLJoinColumns;
30 import oracle.toplink.essentials.internal.ejb.cmp3.xml.XMLHelper;
31
32 import org.w3c.dom.Node JavaDoc;
33
34 /**
35  * An xml extended many to one relationship accessor.
36  *
37  * @author Guy Pelletier
38  * @since TopLink EJB 3.0 Reference Implementation
39  */
40 public class XMLManyToOneAccessor extends ManyToOneAccessor {
41     protected Node JavaDoc m_node;
42     protected XMLHelper m_helper;
43     
44     /**
45      * INTERNAL:
46      */
47     public XMLManyToOneAccessor(MetadataAccessibleObject accessibleObject, Node JavaDoc node, XMLClassAccessor classAccessor) {
48         super(accessibleObject, classAccessor);
49         m_node = node;
50         m_helper = classAccessor.getHelper();
51         
52         XMLAccessorHelper.setRelationshipAccessorData(this, m_node, m_helper);
53     }
54     
55     /**
56      * INTERNAL: (Override from RelationshipAccessor)
57      * Process join columns for this node.
58      */
59     protected MetadataJoinColumns getJoinColumns() {
60         if (m_helper.nodeHasJoinColumns(m_node)) {
61             return new XMLJoinColumns(m_node, m_helper);
62         } else {
63             return super.getJoinColumns();
64         }
65     }
66 }
67
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