Java ByteBuffer Read read(@Nonnull final FileChannel src, @Nonnull final ByteBuffer dst, @Nonnegative final long position)

Description

Read until dst buffer is filled or src channel is reached end.

License

Apache License

Return

The number of bytes read, 0 or more

Declaration

public static int read(@Nonnull final FileChannel src, @Nonnull final ByteBuffer dst,
        @Nonnegative final long position) throws IOException 

Method Source Code

//package com.java2s;
/*/*from www .j  a v  a 2 s  . c o  m*/
 * 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.FileChannel;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;

public class Main {
    /**
     * Read until dst buffer is filled or src channel is reached end.
     * 
     * @return The number of bytes read, 0 or more
     */
    public static int read(@Nonnull final FileChannel src, @Nonnull final ByteBuffer dst,
            @Nonnegative final long position) throws IOException {
        int count = 0;
        long offset = position;
        while (dst.remaining() > 0) {
            int n = src.read(dst, offset);
            if (n == -1) {
                break;
            }
            offset += n;
            count += n;
        }
        return count;
    }
}

Related

1. c_read(Channel fd, ByteBuffer buffer, int count)
2. checkNotReadOnly(ByteBuffer buffer)
3. contentOfUnreadBuffer(final ByteBuffer buffer)
4. enlargeThreadLocalByteBuffer()
5. parseEsInfo(ByteBuffer read)
6. read(ByteBuffer b)
7. read(ByteBuffer bb, FileChannel ch)
8. read(ByteBuffer bb, int elementWidth)
9. read(ByteBuffer buffer)