Java File Read via ByteBuffer readBytes(ReadableByteChannel channel, byte[] array)

Description

read Bytes

License

Open Source License

Declaration

public static byte[] readBytes(ReadableByteChannel channel, byte[] array) throws IOException 

Method Source Code

//package com.java2s;
/**/*from   w  w w .  j  a v  a2  s  . c  o  m*/
 * Copyright (c) 2002-2014 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.IOException;

import java.nio.ByteBuffer;
import java.nio.channels.ReadableByteChannel;

public class Main {
    public static byte[] readBytes(ReadableByteChannel channel, byte[] array) throws IOException {
        return readBytes(channel, array, array.length);
    }

    public static byte[] readBytes(ReadableByteChannel channel, byte[] array, int length) throws IOException {
        return readAndFlip(channel, ByteBuffer.wrap(array), length) ? array : null;
    }

    public static boolean readAndFlip(ReadableByteChannel channel, ByteBuffer buffer, int bytes)
            throws IOException {
        buffer.clear();
        buffer.limit(bytes);
        while (buffer.hasRemaining()) {
            int read = channel.read(buffer);

            if (read == -1) {
                return false;
            }
        }
        buffer.flip();
        return true;
    }
}

Related

1. readBytes(File f)
2. readBytes(final InputStream in, final int length)
3. readBytes(final String file)
4. readBytes(InputStream is)
5. readBytes(Path file)
6. readBytes(String file)
7. readCode(byte[] message)
8. readColumnarKeyBlockDataForNoDictionaryCols(byte[] columnarKeyBlockData)
9. readContent(File file)