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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.

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/*
 * 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.
 */

package com.feilong.lib.net.io;

import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;

/***
 * This class wraps an output stream, storing a reference to its originating
 * socket. When the stream is closed, it will also close the socket
 * immediately afterward. This class is useful for situations where you
 * are dealing with a stream originating from a socket, but do not have
 * a reference to the socket, and want to make sure it closes when the
 * stream closes.
 *
 *
 * @see SocketInputStream
 ***/

public class SocketOutputStream extends FilterOutputStream{

    private final Socket __socket;

    /***
     * Creates a SocketOutputStream instance wrapping an output stream and
     * storing a reference to a socket that should be closed on closing
     * the stream.
     *
     * @param socket
     *            The socket to close on closing the stream.
     * @param stream
     *            The input stream to wrap.
     ***/
    public SocketOutputStream(Socket socket, OutputStream stream){
        super(stream);
        __socket = socket;
    }

    /***
     * Writes a number of bytes from a byte array to the stream starting from
     * a given offset. This method bypasses the equivalent method in
     * FilterOutputStream because the FilterOutputStream implementation is
     * very inefficient.
     *
     * @param buffer
     *            The byte array to write.
     * @param offset
     *            The offset into the array at which to start copying data.
     * @param length
     *            The number of bytes to write.
     * @throws IOException
     *             If an error occurs while writing to the underlying
     *             stream.
     ***/
    @Override
    public void write(byte buffer[],int offset,int length) throws IOException{
        out.write(buffer, offset, length);
    }

    /***
     * Closes the stream and immediately afterward closes the referenced
     * socket.
     *
     * @throws IOException
     *             If there is an error in closing the stream
     *             or socket.
     ***/
    @Override
    public void close() throws IOException{
        super.close();
        __socket.close();
    }
}