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/*  Copyright 1999 Vince Via [email protected]
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/
package com.viaoa.util;

import java.io.*;
import java.util.logging.Logger;
import java.util.zip.*;

/**
 * Object wrapper used to compress an object during serialization.
 * @author vvia
 */
public final class OACompressWrapper implements Serializable {
    static final long serialVersionUID = 1L;
    private static final Logger LOG = Logger.getLogger(OACompressWrapper.class.getName());
    
    private Object object; // object to serialize

    /**
     * @param object to serialize
     */
    public OACompressWrapper(Object object) {
        this.object = object;
    }

    public Object getObject() {
        return object;
    }
    
    /**
     * Called by objectStream to serialize wrapper.  
     */
    private void writeObject(java.io.ObjectOutputStream stream) throws IOException {
        stream.writeBoolean(object != null);
        if (object != null) {
            Deflater d = new Deflater(Deflater.DEFAULT_COMPRESSION);//BEST_SPEED BEST_COMPRESSION);
        	DeflaterOutputStream dos = new DeflaterOutputStream(stream, d, 1024*2);
        	ObjectOutputStream oos = new ObjectOutputStream(dos);
        	oos.writeObject(object);
            //oos.flush();
            dos.finish();
            //dos.flush();
            // dos.close(); // might affect stream by closing it (?? not sure)
            // long sizeBefore = d.getBytesRead();
            // long sizeAfter = d.getBytesWritten();
        }        
    }


    /**
     * Called by objectStream to deserialize a wrapper. 
     */
    private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
        if (stream.readBoolean()) {
    		Inflater inflater = new Inflater();
        	InflaterInputStream iis = new InflaterInputStream(stream, inflater, 1024*2);
        	
        	ObjectInputStream ois = new ObjectInputStream(iis);
        	object = ois.readObject();
    	}
    }

    

}