Java ByteBuffer Put byteBufferToInputStream(final ByteBuffer byteBuffer)

Description

Produce an InputStream that is able to read from a ByteBuffer .

License

Open Source License

Parameter

Parameter	Description
byteBuffer	The ByteBuffer .

Return

An that reads from the .

Declaration

public static InputStream byteBufferToInputStream(final ByteBuffer byteBuffer) 

Method Source Code

//package com.java2s;
/*// w  ww .j  av  a2s .  c  om
 * This file is part of ClassGraph.
 *
 * Author: Luke Hutchison
 *
 * Hosted at: https://github.com/lukehutch/fast-classpath-scanner
 *
 * --
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2018 Luke Hutchison
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without
 * limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
 * LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
 * EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
 * OR OTHER DEALINGS IN THE SOFTWARE.
 */

import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;

public class Main {
    /**
     * Produce an {@link InputStream} that is able to read from a {@link ByteBuffer}.
     * 
     * @param byteBuffer
     *            The {@link ByteBuffer}.
     * @return An {@link InputStream} that reads from the {@ByteBuffer}.
     */
    public static InputStream byteBufferToInputStream(final ByteBuffer byteBuffer) {
        // https://stackoverflow.com/questions/4332264/wrapping-a-bytebuffer-with-an-inputstream/6603018#6603018
        return new InputStream() {
            final ByteBuffer buf = byteBuffer;

            @Override
            public int read() throws IOException {
                if (!buf.hasRemaining()) {
                    return -1;
                }
                return buf.get() & 0xFF;
            }

            @Override
            public int read(final byte[] bytes, final int off, final int len) throws IOException {
                if (!buf.hasRemaining()) {
                    return -1;
                }

                final int bytesRead = Math.min(len, buf.remaining());
                buf.get(bytes, off, bytesRead);
                return bytesRead;
            }
        };
    }
}

Related

1. bufToStream(ByteBuffer b, OutputStream out)
2. byteBufferToOutputStream(ByteBuffer in, OutputStream out)
3. checkReadSpace(FileInputStream aStream, ByteBuffer aBuf)
4. computeSize(ByteBuffer[] buffers)
5. convert(Object lock, CharsetEncoder encoder, ByteBuffer bytes, CharBuffer chars, OutputStream out)