/*
 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/entity/SerializableEntity.java $
 * $Revision: 647816 $
 * $Date: 2008-04-14 07:37:13 -0700 (Mon, 14 Apr 2008) $
 *
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.http.entity;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;

public class SerializableEntity extends AbstractHttpEntity {
    
    private byte[] objSer;
    
    private Serializable objRef;
    
    public SerializableEntity(Serializable ser, boolean bufferize) throws IOException {
        super();
        if (ser == null) {
            throw new IllegalArgumentException("Source object may not be null");
        }
        
        if (bufferize) {
            createBytes(ser);
        } else {
            this.objRef = ser;
        }
    }
    
    private void createBytes(Serializable ser) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(baos);
        out.writeObject(ser);
        out.flush();	
        this.objSer = baos.toByteArray();
    }
    
    public InputStream getContent() throws IOException, IllegalStateException {
        if (this.objSer == null) {
            createBytes(this.objRef);
        }
        return new ByteArrayInputStream(this.objSer);
    }

    public long getContentLength() {
        if (this.objSer ==  null) { 
            return -1;
        } else {
            return this.objSer.length;
        }
    }

    public boolean isRepeatable() {
        return true;
    }

    public boolean isStreaming() {
        return this.objSer == null;
    }

    public void writeTo(OutputStream outstream) throws IOException {
        if (outstream == null) {
            throw new IllegalArgumentException("Output stream may not be null");
        }
        
        if (this.objSer == null) {
            ObjectOutputStream out = new ObjectOutputStream(outstream);
            out.writeObject(this.objRef);
            out.flush();
        } else {
            outstream.write(this.objSer);
            outstream.flush();
        }
    }

}