Java ReadableByteChannel Copy copy(ReadableByteChannel source, WritableByteChannel destination)

Description

Copy the source to target chanel vio java nio.

License

Open Source License

Parameter

Parameter	Description
source	the source channel
destination	the destination channel

Exception

Parameter	Description
IOException	when the cannels cannot be copied

Declaration

public static void copy(ReadableByteChannel source, WritableByteChannel destination) throws IOException 

Method Source Code

//package com.java2s;
/*// www.  ja va 2s  .c om
 * Copyright 2012 PRODYNA AG
 *
 * Licensed under the Eclipse Public License (EPL), Version 1.0 (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.opensource.org/licenses/eclipse-1.0.php or
 * http://www.nabucco.org/License.html
 *
 * 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.
 */

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;

public class Main {
    /**
     * Copy the input stream into the output stream.
     * 
     * @param in
     *            the input stream to read
     * @param out
     *            the output stream to write into
     * 
     * @throws IOException
     *             when the stream cannot be copied
     */
    public static void copy(InputStream in, OutputStream out) throws IOException {
        ReadableByteChannel source = Channels.newChannel(in);
        WritableByteChannel destination = Channels.newChannel(out);

        copy(source, destination);
    }

    /**
     * Copy the source to target chanel vio java nio.
     * 
     * @param source
     *            the source channel
     * @param destination
     *            the destination channel
     * 
     * @throws IOException
     *             when the cannels cannot be copied
     */
    public static void copy(ReadableByteChannel source, WritableByteChannel destination) throws IOException {

        final ByteBuffer buffer = ByteBuffer.allocateDirect(16 * 1024);
        while (source.read(buffer) != -1) {
            buffer.flip();
            destination.write(buffer);
            buffer.compact();
        }

        buffer.flip();

        while (buffer.hasRemaining()) {
            destination.write(buffer);
        }
    }
}

Related

1. copy(ReadableByteChannel _in, WritableByteChannel out, long amount)
2. copy(ReadableByteChannel input, WritableByteChannel output, long start, long length)
3. copy(ReadableByteChannel inputChannel, WritableByteChannel outputChannel)
4. copy(ReadableByteChannel src, WritableByteChannel dest)
5. copyTo(ReadableByteChannel from, WritableByteChannel to)
6. fastChannelCopy(final ReadableByteChannel input, final WritableByteChannel output, long toRead)
7. fastChannelCopy(final ReadableByteChannel src, final WritableByteChannel dest)