| /* CollectionPersistenceDelegate.java - A PersistenceDelegate for Collection subclasses. |
| Copyright (C) 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.java.beans.encoder; |
| |
| import java.util.Collection; |
| import java.beans.Encoder; |
| import java.beans.Expression; |
| import java.beans.PersistenceDelegate; |
| import java.beans.Statement; |
| |
| import java.util.Iterator; |
| |
| /** <p>A <code>PersistenceDelegate</code> implementation that calls |
| * the no-argument constructor to create the Collection instance and |
| * uses an iterator to add all the objects it reaches through it.</p> |
| * |
| * <p>It is used for <code>Set</code> and <code>List</code> |
| * implementations.</p> |
| * |
| * @author Robert Schuster (robertschuster@fsfe.org) |
| */ |
| public class CollectionPersistenceDelegate extends PersistenceDelegate |
| { |
| |
| protected Expression instantiate(Object oldInstance, Encoder out) |
| { |
| return new Expression( |
| oldInstance, |
| oldInstance.getClass(), |
| "new", |
| null); |
| } |
| |
| protected void initialize(Class type, Object oldInstance, Object newInstance, |
| Encoder out) |
| { |
| Iterator ite = ((Collection) oldInstance).iterator(); |
| |
| while (ite.hasNext()) |
| { |
| out.writeStatement(new Statement(oldInstance, "add", |
| new Object[] { ite.next() })); |
| |
| } |
| |
| } |
| |
| } |