001package org.apache.commons.jcs.utils.serialization; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import org.apache.commons.jcs.engine.behavior.IElementSerializer; 023import org.apache.commons.jcs.io.ObjectInputStreamClassLoaderAware; 024 025import java.io.BufferedInputStream; 026import java.io.ByteArrayInputStream; 027import java.io.ByteArrayOutputStream; 028import java.io.IOException; 029import java.io.ObjectInputStream; 030import java.io.ObjectOutputStream; 031 032/** 033 * Performs default serialization and de-serialization. 034 * <p> 035 * @author Aaron Smuts 036 */ 037public class StandardSerializer 038 implements IElementSerializer 039{ 040 /** 041 * Serializes an object using default serialization. 042 * <p> 043 * @param obj 044 * @return byte[] 045 * @throws IOException 046 */ 047 @Override 048 public <T> byte[] serialize( T obj ) 049 throws IOException 050 { 051 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 052 ObjectOutputStream oos = new ObjectOutputStream( baos ); 053 try 054 { 055 oos.writeObject( obj ); 056 } 057 finally 058 { 059 oos.close(); 060 } 061 return baos.toByteArray(); 062 } 063 064 /** 065 * Uses default de-serialization to turn a byte array into an object. All exceptions are 066 * converted into IOExceptions. 067 * <p> 068 * @param data 069 * @return Object 070 * @throws IOException 071 * @throws ClassNotFoundException 072 */ 073 @Override 074 public <T> T deSerialize( byte[] data, ClassLoader loader ) 075 throws IOException, ClassNotFoundException 076 { 077 ByteArrayInputStream bais = new ByteArrayInputStream( data ); 078 BufferedInputStream bis = new BufferedInputStream( bais ); 079 ObjectInputStream ois = new ObjectInputStreamClassLoaderAware( bis, loader ); 080 try 081 { 082 @SuppressWarnings("unchecked") // Need to cast from Object 083 T readObject = (T) ois.readObject(); 084 return readObject; 085 } 086 finally 087 { 088 ois.close(); 089 } 090 } 091}