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.kernel;
20
21 import java.util.BitSet;
22 import java.util.Collection;
23
24 import org.apache.openjpa.lib.rop.ResultObjectProvider;
25 import org.apache.openjpa.meta.ClassMetaData;
26 import org.apache.openjpa.meta.FieldMetaData;
27
28 /**
29 * Base class for store manager decorators that delegate to another
30 * store manager for some operations.
31 *
32 * @author Abe White
33 */
34 public abstract class DelegatingStoreManager
35 implements StoreManager {
36
37 private final StoreManager _store;
38 private final DelegatingStoreManager _del;
39
40 /**
41 * Constructor. Supply delegate.
42 */
43 public DelegatingStoreManager(StoreManager store) {
44 _store = store;
45 if (store instanceof DelegatingStoreManager)
46 _del = (DelegatingStoreManager) _store;
47 else
48 _del = null;
49 }
50
51 /**
52 * Return the wrapped store manager.
53 */
54 public StoreManager getDelegate() {
55 return _store;
56 }
57
58 /**
59 * Return the base underlying native store manager.
60 */
61 public StoreManager getInnermostDelegate() {
62 return (_del == null) ? _store : _del.getInnermostDelegate();
63 }
64
65 public int hashCode() {
66 return getInnermostDelegate().hashCode();
67 }
68
69 public boolean equals(Object other) {
70 if (other == this)
71 return true;
72 if (other instanceof DelegatingStoreManager)
73 other = ((DelegatingStoreManager) other).getInnermostDelegate();
74 return getInnermostDelegate().equals(other);
75 }
76
77 public void setContext(StoreContext ctx) {
78 _store.setContext(ctx);
79 }
80
81 public void beginOptimistic() {
82 _store.beginOptimistic();
83 }
84
85 public void rollbackOptimistic() {
86 _store.rollbackOptimistic();
87 }
88
89 public void begin() {
90 _store.begin();
91 }
92
93 public void commit() {
94 _store.commit();
95 }
96
97 public void rollback() {
98 _store.rollback();
99 }
100
101 public boolean exists(OpenJPAStateManager sm, Object context) {
102 return _store.exists(sm, context);
103 }
104
105 public boolean syncVersion(OpenJPAStateManager sm, Object context) {
106 return _store.syncVersion(sm, context);
107 }
108
109 public boolean initialize(OpenJPAStateManager sm, PCState state,
110 FetchConfiguration fetch, Object context) {
111 return _store.initialize(sm, state, fetch, context);
112 }
113
114 public boolean load(OpenJPAStateManager sm, BitSet fields,
115 FetchConfiguration fetch, int lockLevel, Object context) {
116 return _store.load(sm, fields, fetch, lockLevel, context);
117 }
118
119 public Collection loadAll(Collection sms, PCState state, int load,
120 FetchConfiguration fetch, Object context) {
121 return _store.loadAll(sms, state, load, fetch, context);
122 }
123
124 public void beforeStateChange(OpenJPAStateManager sm, PCState fromState,
125 PCState toState) {
126 _store.beforeStateChange(sm, fromState, toState);
127 }
128
129 public Collection flush(Collection sms) {
130 return _store.flush(sms);
131 }
132
133 public boolean assignObjectId(OpenJPAStateManager sm, boolean preFlush) {
134 return _store.assignObjectId(sm, preFlush);
135 }
136
137 public boolean assignField(OpenJPAStateManager sm, int field,
138 boolean preFlush) {
139 return _store.assignField(sm, field, preFlush);
140 }
141
142 public Class getManagedType(Object oid) {
143 return _store.getManagedType(oid);
144 }
145
146 public Class getDataStoreIdType(ClassMetaData meta) {
147 return _store.getDataStoreIdType(meta);
148 }
149
150 public Object copyDataStoreId(Object oid, ClassMetaData meta) {
151 return _store.copyDataStoreId(oid, meta);
152 }
153
154 public Object newDataStoreId(Object oidVal, ClassMetaData meta) {
155 return _store.newDataStoreId(oidVal, meta);
156 }
157
158 public Object getClientConnection() {
159 return _store.getClientConnection();
160 }
161
162 public void retainConnection() {
163 _store.retainConnection();
164 }
165
166 public void releaseConnection() {
167 _store.releaseConnection();
168 }
169
170 public ResultObjectProvider executeExtent(ClassMetaData meta,
171 boolean subclasses, FetchConfiguration fetch) {
172 return _store.executeExtent(meta, subclasses, fetch);
173 }
174
175 public StoreQuery newQuery(String language) {
176 return _store.newQuery(language);
177 }
178
179 public FetchConfiguration newFetchConfiguration() {
180 return _store.newFetchConfiguration();
181 }
182
183 public void close() {
184 _store.close();
185 }
186
187 public int compareVersion(OpenJPAStateManager state, Object v1, Object v2) {
188 return _store.compareVersion(state, v1, v2);
189 }
190
191 public Seq getDataStoreIdSequence(ClassMetaData forClass) {
192 return _store.getDataStoreIdSequence(forClass);
193 }
194
195 public Seq getValueSequence(FieldMetaData fmd) {
196 return _store.getValueSequence(fmd);
197 }
198
199 public boolean cancelAll() {
200 return _store.cancelAll();
201 }
202 }
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