Java ReadableByteChannel Copy copy(ReadableByteChannel inputChannel, WritableByteChannel outputChannel)

Description

copy

License

Apache License

Declaration

public static int copy(ReadableByteChannel inputChannel, WritableByteChannel outputChannel) throws IOException 

Method Source Code

//package com.java2s;
/*//from   w w w  .j av a2 s .c  om
 * 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.
 */

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;

public class Main {
    public static int copy(ReadableByteChannel inputChannel, WritableByteChannel outputChannel) throws IOException {
        ByteBuffer buffer = ByteBuffer.allocateDirect(128);
        int readSize = 0;
        int copySize = 0;

        while (true) {
            readSize = inputChannel.read(buffer);
            if (readSize == -1)
                break;
            copySize += readSize;

            buffer.flip();
            outputChannel.write(buffer);
            buffer.compact();
        }
        buffer.flip();
        while (buffer.hasRemaining()) {
            outputChannel.write(buffer);
        }
        return copySize;
    }
}

Related

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