activeio-core/src/main/java/org/apache/activeio/adapter/PacketOutputStream.java

/**
 *
 * Copyright 2005-2006 The Apache Software Foundation
 *
 * 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 org.apache.activeio.adapter;

import java.io.IOException;
import java.io.OutputStream;

import org.apache.activeio.packet.Packet;

/**
 * Provides an OutputStream for a given Packet.
 *  
 * @version $Revision$
 */
public class PacketOutputStream extends OutputStream {
    
    final Packet packet;
    
    public PacketOutputStream(Packet packet) {
        this.packet = packet;
    }

    public void write(int b) throws IOException {
        if( !packet.write(b) )
            throw new IOException("Packet does not have any remaining space to write to.");
    }
    
    public void write(byte[] b, int off, int len) throws IOException {
        if( packet.write(b, off, len)!=len )
            throw new IOException("Packet does not have "+len+" byte(s) left to write to.");
    }
}