Java ReadableByteChannel Read readCharArray(ReadableByteChannel channel, ByteBuffer buffer, char[] charArray)

Description

read Char Array

License

Open Source License

Declaration

private static char[] readCharArray(ReadableByteChannel channel, ByteBuffer buffer, char[] charArray)
            throws IOException 

Method Source Code

//package com.java2s;
/**//from   ww w.  ja  v a 2 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 {
    private static char[] readCharArray(ReadableByteChannel channel, ByteBuffer buffer, char[] charArray)
            throws IOException {
        buffer.clear();
        int charsLeft = charArray.length;
        int maxSize = buffer.capacity() / 2;
        int offset = 0; // offset in chars
        while (charsLeft > 0) {
            if (charsLeft > maxSize) {
                buffer.limit(maxSize * 2);
                charsLeft -= maxSize;
            } else {
                buffer.limit(charsLeft * 2);
                charsLeft = 0;
            }
            if (channel.read(buffer) != buffer.limit()) {
                return null;
            }
            buffer.flip();
            int length = buffer.limit() / 2;
            buffer.asCharBuffer().get(charArray, offset, length);
            offset += length;
            buffer.clear();
        }
        return charArray;
    }
}

Related

1. read(ReadableByteChannel channel, int amount, ByteBuffer dest)
2. readAll(ReadableByteChannel ch, ByteBuffer dst)
3. readAllBytesOrNone(ReadableByteChannel channel, ByteBuffer buffer, int numBytes)
4. readAnerisHeader(ReadableByteChannel from, ByteBuffer buffer)
5. readBuffer(ReadableByteChannel chan, ByteBuffer buf)
6. readFromAnerisChannel(ReadableByteChannel chan, ByteBuffer buffer)
7. readFromChannel(ReadableByteChannel channel, ByteBuffer buffer)
8. readFull(ReadableByteChannel ch, ByteBuffer dst)
9. readFully(final ReadableByteChannel channel, final ByteBuffer buf)