001/* 002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and contributors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Nuxeo - initial API and implementation 018 * 019 * $Id: SerializableHelper.java 28515 2008-01-06 20:37:29Z sfermigier $ 020 */ 021 022package org.nuxeo.common.utils; 023 024import java.io.ByteArrayInputStream; 025import java.io.ByteArrayOutputStream; 026import java.io.IOException; 027import java.io.ObjectInputStream; 028import java.io.ObjectOutputStream; 029import java.io.Serializable; 030 031/** 032 * Helper to test object serialization. Used only in tests. 033 * 034 * @author <a href="mailto:ja@nuxeo.com">Julien Anguenot</a> 035 */ 036public final class SerializableHelper { 037 038 // This is an utility class. 039 private SerializableHelper() { 040 } 041 042 /** 043 * Checks if a given object is serializable. 044 * 045 * @param ob the actual object we want to test 046 * @return true if the object is serializable. 047 */ 048 // XXX AT: since class loader isolation, this module is not aware anymore of 049 // nuxeo.ear classes => ClassCastException can be thrown is tested object is 050 // a DocumentModel for instance. 051 public static boolean isSerializable(Object ob) { 052 if (!(ob instanceof Serializable)) { 053 return false; 054 } 055 try { 056 ob = serializeUnserialize(ob); 057 return ob != null; 058 } catch (IOException e) { 059 return false; 060 } catch (ClassNotFoundException e) { 061 return false; 062 } 063 } 064 065 /** 066 * Serializes and unserializes back an object to test whether it is correctly rebuilt (to be used in unit tests as 067 * sanity checks). 068 * 069 * @param ob the actual object we want to test 070 * @return true if the object is serializable. 071 */ 072 public static Object serializeUnserialize(Object ob) throws IOException, ClassNotFoundException { 073 Serializable in = (Serializable) ob; 074 ByteArrayOutputStream byteOutStream = new ByteArrayOutputStream(); 075 ObjectOutputStream outStream = new ObjectOutputStream(byteOutStream); 076 outStream.writeObject(in); 077 ByteArrayInputStream byteInStream = new ByteArrayInputStream(byteOutStream.toByteArray()); 078 ObjectInputStream inStream = new ObjectInputStream(byteInStream); 079 return inStream.readObject(); 080 } 081 082}