Java ByteBuffer Create createByteBuffer(byte... data)

Description

create Byte Buffer

License

Open Source License

Declaration

public static ByteBuffer createByteBuffer(byte... data) 

Method Source Code

//package com.java2s;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;

import java.util.Collections;
import java.util.Map;
import java.util.WeakHashMap;

public class Main {
    private static final Map<Buffer, Object> trackingHash = Collections
            .synchronizedMap(new WeakHashMap<Buffer, Object>());
    private static final Object ref = new Object();
    private static final boolean trackDirectMemory = false;

    /**//from  w  w  w. j a  v a 2  s.c  o m
     * Create a new ByteBuffer of the specified size.
     *
     * @param size
     *            required number of ints to store.
     * @return the new IntBuffer
     */
    public static ByteBuffer createByteBuffer(int size) {
        ByteBuffer buf = ByteBuffer.allocateDirect(size).order(ByteOrder.nativeOrder());
        buf.clear();
        if (trackDirectMemory) {
            trackingHash.put(buf, ref);
        }
        return buf;
    }

    /**
     * Create a new ByteBuffer of an appropriate size to hold the specified
     * number of ints only if the given buffer if not already the right size.
     *
     * @param buf
     *            the buffer to first check and rewind
     * @param size
     *            number of bytes that need to be held by the newly created
     *            buffer
     * @return the requested new IntBuffer
     */
    public static ByteBuffer createByteBuffer(ByteBuffer buf, int size) {
        if (buf != null && buf.limit() == size) {
            buf.rewind();
            return buf;
        }

        buf = createByteBuffer(size);
        return buf;
    }

    public static ByteBuffer createByteBuffer(byte... data) {
        ByteBuffer bb = createByteBuffer(data.length);
        bb.put(data);
        bb.flip();
        return bb;
    }

    public static ByteBuffer createByteBuffer(String data) {
        byte[] bytes = data.getBytes();
        ByteBuffer bb = createByteBuffer(bytes.length);
        bb.put(bytes);
        bb.flip();
        return bb;
    }
}

Related

1. allocaleByteBuffer(int capacity, boolean direct)
2. allocateByteBuffer(boolean useDirectBuffer, int bufSize)
3. allocateByteBuffer(final int bytes)
4. allocateByteBuffer(int capacity)
5. createByteBuffer(byte... values)
6. createByteBuffer(byte[] data)
7. createByteBuffer(int byteCount)
8. createByteBuffer(int capacity)