Serializer.java

/**
 *  OpenKM, Open Document Management System (http://www.openkm.com)
 *  Copyright (c) 2006-2011  Paco Avila & Josep Llort
 *
 *  No bytes were intentionally harmed during the development of this application.
 *
 *  This program 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 of the License, or
 *  (at your option) any later version.
 *  
 *  This program 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 this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package com.openkm.util;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.openkm.core.Config;

public class Serializer {
	private static Logger log = LoggerFactory.getLogger(Serializer.class);
	
	/**
	 * @param obj
	 */
	public static void write(String filename, Object obj) {
		FileOutputStream fos = null;
		ObjectOutputStream oos = null;
		
		try {
			fos = new FileOutputStream(Config.HOME_DIR+File.separator+filename+".ser");
			oos = new ObjectOutputStream(fos);
			oos.writeObject(obj);
		} catch (FileNotFoundException e) {
			log.error(e.getMessage());
		} catch (IOException e) {
			log.error(e.getMessage());
		} finally {
			IOUtils.closeQuietly(oos);
			IOUtils.closeQuietly(fos);
		}
	}
	
	/**
	 * @param obj
	 */
	public static byte[] write(Object obj) throws IOException {
		ByteArrayOutputStream baos = null;
		ObjectOutputStream oos = null;
		
		try {
			baos = new ByteArrayOutputStream(); 
			oos = new ObjectOutputStream(baos);
			oos.writeObject(obj);
			oos.flush();
			baos.flush();
			return baos.toByteArray();
		} finally {
			IOUtils.closeQuietly(oos);
			IOUtils.closeQuietly(baos);
		}
	}
	
	/**
	 * @param obj
	 */
	public static Object read(String filename) {
		FileInputStream fis = null;
		ObjectInputStream ois = null;
		Object obj = null;
		
		try {
			fis = new FileInputStream(Config.HOME_DIR+File.separator+filename+".ser");
			ois = new ObjectInputStream(fis);
			obj = ois.readObject();
		} catch (FileNotFoundException e) {
			log.error(e.getMessage());
		} catch (IOException e) {
			log.error(e.getMessage());
		} catch (ClassNotFoundException e) {
			log.error(e.getMessage());
		} finally {
			IOUtils.closeQuietly(ois);
			IOUtils.closeQuietly(fis);
		}
		
		return obj;
	}
	
	/**
	 * @param obj
	 */
	public static Object read(byte[] data) throws IOException, ClassNotFoundException {
		ByteArrayInputStream bais = null;
		ObjectInputStream ois = null;
		
		try {
			bais = new ByteArrayInputStream(data);
			ois = new ObjectInputStream(bais);
			return ois.readObject();
		} finally {
			IOUtils.closeQuietly(ois);
			IOUtils.closeQuietly(bais);
		}
	}
}