001/* 002 * (C) Copyright 2007 Nuxeo SAS (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * Nuxeo - initial API and implementation 016 * 017 * $Id: DeepCopy.java 19474 2007-05-27 10:18:21Z sfermigier $ 018 */ 019 020package org.nuxeo.ecm.platform.ui.web.util; 021 022import java.io.ByteArrayInputStream; 023import java.io.ByteArrayOutputStream; 024import java.io.IOException; 025import java.io.ObjectInputStream; 026import java.io.ObjectOutputStream; 027 028/** 029 * Deep copy utils. 030 * <p> 031 * Most classes implementing the {@link Cloneable} interface only perform a shallow copy of an object. This class 032 * performs deep cloning serializing and deserializing an object. Therefore only serializable objects can be copied 033 * using this util. 034 * 035 * @author <a href="mailto:at@nuxeo.com">Anahide Tchertchian</a> 036 */ 037// XXX AT: needs optimizing, see 038// http://javatechniques.com/blog/faster-deep-copies-of-java-objects/ 039public final class DeepCopy { 040 041 // Utility class. 042 private DeepCopy() { 043 } 044 045 public static Object deepCopy(Object object) { 046 Object copy; 047 try { 048 // Write the object out to a byte array 049 ByteArrayOutputStream bos = new ByteArrayOutputStream(); 050 ObjectOutputStream out = new ObjectOutputStream(bos); 051 out.writeObject(object); 052 out.flush(); 053 out.close(); 054 055 // Make an input stream from the byte array and read 056 // a copy of the object back in. 057 ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bos.toByteArray())); 058 copy = in.readObject(); 059 } catch (IOException e) { 060 throw new RuntimeException(e); 061 } catch (ClassNotFoundException cnfe) { 062 throw new RuntimeException(cnfe); 063 } 064 return copy; 065 } 066 067}