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Java > Open Source Codes > oracle > toplink > essentials > internal > ejb > cmp3 > metadata > accessors > ManyToOneAccessor


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.metadata.accessors;
23
24 import javax.persistence.ManyToOne;
25
26 import oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.ClassAccessor;
27 import oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.objects.MetadataAccessibleObject;
28
29 import oracle.toplink.essentials.mappings.OneToOneMapping;
30
31 /**
32  * A many to one relationship accessor.
33  *
34  * @author Guy Pelletier
35  * @since TopLink EJB 3.0 Reference Implementation
36  */
37 public class ManyToOneAccessor extends ObjectAccessor {
38     /**
39      * INTERNAL:
40      */
41     public ManyToOneAccessor(MetadataAccessibleObject accessibleObject, ClassAccessor classAccessor) {
42         super(accessibleObject, classAccessor);
43         
44         ManyToOne manyToOne = getAnnotation(ManyToOne.class);
45         
46         if (manyToOne != null) {
47             setFetchType(manyToOne.fetch());
48             setIsOptional(manyToOne.optional());
49             setCascadeTypes(manyToOne.cascade());
50             setTargetEntity(manyToOne.targetEntity());
51         }
52     }
53     
54     /**
55      * INTERNAL:
56      */
57     public boolean isManyToOne() {
58         return true;
59     }
60     
61     /**
62      * INTERNAL:
63      * Process a @ManyToOne or many-to-one element into a TopLink OneToOne
64      * mapping.
65      */
66     public void process() {
67         setReferenceClass(m_targetEntity, getLogger().MANY_TO_ONE_MAPPING_REFERENCE_CLASS);
68         
69         // Initialize our mapping now with what we found.
70 OneToOneMapping mapping = initOneToOneMapping();
71
72         // Now process the JoinColumns (if there are any) for this mapping.
73 processOwningMappingKeys(mapping);
74         
75         // Add the mapping to the descriptor.
76 m_descriptor.addMapping(mapping);
77     }
78 }
79
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