01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: package java.beans;
19:
20: class NullPersistenceDelegate extends PersistenceDelegate {
21: @Override
22: protected Expression instantiate(Object oldInstance, Encoder out) {
23: return null;
24: }
25:
26: @Override
27: /*
28: * It's unnecessary to do anything for initialization, because two mutatable
29: * strings are actually equivalent already.
30: */
31: protected void initialize(Class<?> type, Object oldInstance,
32: Object newInstance, Encoder out) {
33: // do nothing
34: }
35:
36: @Override
37: public void writeObject(Object oldInstance, Encoder out) {
38: // do nothing
39: }
40: }
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