1 /*
2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
180 * method which returns an expression involving elements in
181 * a cloned environment simulating the state of an input stream during
182 * reading. Each statement returned will have had all instances
183 * the old environment replaced with objects which exist in the new
184 * one. In particular, references to the target of these statements,
185 * which start out as references to <code>oldInstance</code> are returned
186 * as references to the <code>newInstance</code> instead.
187 * Executing these statements effects an incremental
188 * alignment of the state of the two objects as a series of
189 * modifications to the objects in the new environment.
190 * By the time the initialize method returns it should be impossible
191 * to tell the two instances apart by using their public APIs.
192 * Most importantly, the sequence of steps that were used to make
193 * these objects appear equivalent will have been recorded
194 * by the output stream and will form the actual output when
195 * the stream is flushed.
196 * <p>
197 * The default implementation, calls the <code>initialize</code>
198 * method of the type's superclass.
199 *
200 * @param oldInstance The instance to be copied.
201 * @param newInstance The instance that is to be modified.
202 * @param out The stream to which any initialization statements should be written.
203 *
204 * @throws NullPointerException if {@code out} is {@code null}
205 */
206 protected void initialize(Class<?> type,
207 Object oldInstance, Object newInstance,
208 Encoder out)
209 {
210 Class<?> superType = type.getSuperclass();
211 PersistenceDelegate info = out.getPersistenceDelegate(superType);
212 info.initialize(superType, oldInstance, newInstance, out);
213 }
214 }
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1 /*
2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
180 * method which returns an expression involving elements in
181 * a cloned environment simulating the state of an input stream during
182 * reading. Each statement returned will have had all instances
183 * the old environment replaced with objects which exist in the new
184 * one. In particular, references to the target of these statements,
185 * which start out as references to <code>oldInstance</code> are returned
186 * as references to the <code>newInstance</code> instead.
187 * Executing these statements effects an incremental
188 * alignment of the state of the two objects as a series of
189 * modifications to the objects in the new environment.
190 * By the time the initialize method returns it should be impossible
191 * to tell the two instances apart by using their public APIs.
192 * Most importantly, the sequence of steps that were used to make
193 * these objects appear equivalent will have been recorded
194 * by the output stream and will form the actual output when
195 * the stream is flushed.
196 * <p>
197 * The default implementation, calls the <code>initialize</code>
198 * method of the type's superclass.
199 *
200 * @param type the type of the instances
201 * @param oldInstance The instance to be copied.
202 * @param newInstance The instance that is to be modified.
203 * @param out The stream to which any initialization statements should be written.
204 *
205 * @throws NullPointerException if {@code out} is {@code null}
206 */
207 protected void initialize(Class<?> type,
208 Object oldInstance, Object newInstance,
209 Encoder out)
210 {
211 Class<?> superType = type.getSuperclass();
212 PersistenceDelegate info = out.getPersistenceDelegate(superType);
213 info.initialize(superType, oldInstance, newInstance, out);
214 }
215 }
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