binaryserializationops.java

来自「Mandarax是一个规则引擎的纯Java实现。它支持多类型的事实和基于反映的规」· Java 代码 · 共 83 行

package org.mandarax.zkb;
/*
 * Copyright (C) 1999-2004 <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</a>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.util.Map;
 
/**
 * Object persistency service based on classical binary object serialization.
 * Requires that all objects in the map are serializable.
 * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
 * @version 3.4 <7 March 05>
 * @since 2.2
 */
public class BinarySerializationOPS extends AbstractOPS {
	/**
	 * Export objects.
	 * @param out an output stream
	 * @exception an io exception
	 */
	public synchronized void exportObjects(OutputStream out) throws IOException {
		ObjectOutputStream oout = new ObjectOutputStream(out);
		oout.writeObject(objectsByUri);
	}
	/**
	 * Import objects.
	 * @param in an input stream
	 * @exception an io exception
	 */
	public synchronized void importObjects(InputStream in) throws IOException {
		ObjectInputStream oin = null;
		try {
			reset();
			oin = new ObjectInputStream(in);
			objectsByUri = (Map)oin.readObject();
			reverseMap(objectsByUri,urisByObject);
			
		}
		catch (ClassNotFoundException x) {
			throw new IOException(x.getMessage());
		}
	}	
	/**
	 * Get name.
	 * @return the name of the service
	 */
	public String getName() {
		return "binary serialization";
	}
	/**
	 * Get a brief description.
	 * @return a brief description of the service
	 */
	public String getDescription() {
		return "Object persistency service based on binary serialization, objects must be serializable";
	}
	/**
	 * Get the extension of the associated files.
	 * @return a file extension
	 */
	public String getExtension() {
		return "ser";
	}
}