1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.openjpa.jdbc.meta.strats;
20
21 import java.sql.SQLException;
22
23 import org.apache.openjpa.conf.OpenJPAConfiguration;
24 import org.apache.openjpa.jdbc.kernel.JDBCFetchConfiguration;
25 import org.apache.openjpa.jdbc.kernel.JDBCStore;
26 import org.apache.openjpa.jdbc.meta.ClassMapping;
27 import org.apache.openjpa.jdbc.meta.FieldMapping;
28 import org.apache.openjpa.jdbc.schema.Column;
29 import org.apache.openjpa.jdbc.schema.ForeignKey;
30 import org.apache.openjpa.jdbc.sql.Joins;
31 import org.apache.openjpa.jdbc.sql.Result;
32 import org.apache.openjpa.jdbc.sql.Select;
33 import org.apache.openjpa.kernel.OpenJPAStateManager;
34 import org.apache.openjpa.lib.util.Localizer;
35 import org.apache.openjpa.meta.JavaTypes;
36 import org.apache.openjpa.util.MetaDataException;
37 import org.apache.openjpa.util.Proxy;
38
39 /**
40 * Maps a relation to a collection of other objects using an inverse
41 * foreign key in the related object table.
42 *
43 * @author Abe White
44 */
45 public class RelationCollectionInverseKeyFieldStrategy
46 extends RelationToManyInverseKeyFieldStrategy
47 implements LRSCollectionFieldStrategy {
48
49 private static final Localizer _loc = Localizer.forPackage
50 (RelationCollectionInverseKeyFieldStrategy.class);
51
52 public FieldMapping getFieldMapping() {
53 return field;
54 }
55
56 public ClassMapping[] getIndependentElementMappings(boolean traverse) {
57 return super.getIndependentElementMappings(traverse);
58 }
59
60 public Column[] getElementColumns(ClassMapping elem) {
61 return elem.getPrimaryKeyColumns();
62 }
63
64 public ForeignKey getJoinForeignKey(ClassMapping elem) {
65 return super.getJoinForeignKey(elem);
66 }
67
68 public void selectElement(Select sel, ClassMapping elem, JDBCStore store,
69 JDBCFetchConfiguration fetch, int eagerMode, Joins joins) {
70 super.selectElement(sel, elem, store, fetch, eagerMode, joins);
71 }
72
73 public Object loadElement(OpenJPAStateManager sm, JDBCStore store,
74 JDBCFetchConfiguration fetch, Result res, Joins joins)
75 throws SQLException {
76 return super.loadElement(sm, store, fetch, res, joins);
77 }
78
79 public Joins join(Joins joins, ClassMapping elem) {
80 return super.join(joins, elem);
81 }
82
83 public Joins joinElementRelation(Joins joins, ClassMapping elem) {
84 return super.joinElementRelation(joins, elem);
85 }
86
87 protected Proxy newLRSProxy() {
88 return new LRSProxyCollection(this);
89 }
90
91 public void map(boolean adapt) {
92 if (field.getTypeCode() != JavaTypes.COLLECTION
93 && field.getTypeCode() != JavaTypes.ARRAY)
94 throw new MetaDataException(_loc.get("not-coll", field));
95 super.map(adapt);
96 }
97 }
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