001: /*
002: * $Header: /export/home/cvsroot/MyPersonalizerRepository/MyPersonalizer/Subsystems/Kernel/Sources/es/udc/mypersonalizer/kernel/util/general/Cloner.java,v 1.1.1.1 2004/03/25 12:08:38 fbellas Exp $
003: * $Revision: 1.1.1.1 $
004: * $Date: 2004/03/25 12:08:38 $
005: *
006: * =============================================================================
007: *
008: * Copyright (c) 2003, The MyPersonalizer Development Group
009: * (http://www.tic.udc.es/~fbellas/mypersonalizer/index.html) at
010: * University Of A Coruna
011: * All rights reserved.
012: *
013: * Redistribution and use in source and binary forms, with or without
014: * modification, are permitted provided that the following conditions are met:
015: *
016: * - Redistributions of source code must retain the above copyright notice,
017: * this list of conditions and the following disclaimer.
018: *
019: * - Redistributions in binary form must reproduce the above copyright notice,
020: * this list of conditions and the following disclaimer in the documentation
021: * and/or other materials provided with the distribution.
022: *
023: * - Neither the name of the University Of A Coruna nor the names of its
024: * contributors may be used to endorse or promote products derived from
025: * this software without specific prior written permission.
026: *
027: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
028: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
029: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
030: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
031: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
032: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
033: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
034: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
035: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
036: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
037: * POSSIBILITY OF SUCH DAMAGE.
038: *
039: */
040:
041: package es.udc.mypersonalizer.kernel.util.general;
042:
043: import java.io.Serializable;
044: import java.io.ByteArrayInputStream;
045: import java.io.ByteArrayOutputStream;
046: import java.io.ObjectInputStream;
047: import java.io.ObjectOutputStream;
048: import java.io.IOException;
049:
050: /**
051: * This utility class clones objects by using serialization.
052: *
053: * @author Fernando Bellas
054: * @since 1.0
055: */
056: public final class Cloner {
057:
058: /**
059: * Disallows creating instances of this class.
060: */
061: private Cloner() {
062: }
063:
064: /**
065: * Clones the instance passed.
066: *
067: * @return the clonned instance
068: * @throws IOException if it was unable to clone the instance passed
069: */
070: public static Serializable clone(Serializable serializable)
071: throws IOException {
072:
073: ByteArrayOutputStream byteArrayOutputStream = null;
074: ObjectOutputStream objectOutputStream = null;
075: ByteArrayInputStream byteArrayInputStream = null;
076: ObjectInputStream objectInputStream = null;
077: Serializable clone = null;
078: byte[] state;
079:
080: try {
081: byteArrayOutputStream = new ByteArrayOutputStream();
082: objectOutputStream = new ObjectOutputStream(
083: byteArrayOutputStream);
084: objectOutputStream.writeObject(serializable);
085: objectOutputStream.flush();
086: state = byteArrayOutputStream.toByteArray();
087:
088: byteArrayInputStream = new ByteArrayInputStream(state);
089: objectInputStream = new ObjectInputStream(
090: byteArrayInputStream);
091:
092: return (Serializable) objectInputStream.readObject();
093:
094: } catch (ClassNotFoundException e) { // this should never occur
095: throw new IOException(
096: "ClassNotFoundException occured in the "
097: + "Cloner class.");
098: } catch (IOException e) {
099: throw new IOException("IOException in Cloner class: "
100: + e.getMessage());
101: } finally {
102: if (objectOutputStream != null) {
103: objectOutputStream.close();
104: }
105: if (byteArrayInputStream != null) {
106: byteArrayInputStream.close();
107: }
108: if (objectInputStream != null) {
109: objectInputStream.close();
110: }
111: if (byteArrayOutputStream != null) {
112: byteArrayOutputStream.close();
113: }
114: }
115:
116: }
117:
118: }
|