Java ByteBuffer Size rightSize(ByteBuffer in)

Description

right Size

License

Apache License

Declaration

public static ByteBuffer rightSize(ByteBuffer in) 

Method Source Code

//package com.java2s;
/**/* w w w  .j a va2  s .c om*/
 * 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.nio.ByteBuffer;

public class Main {
    public static ByteBuffer rightSize(ByteBuffer in) {
        if (wrapsFullArray(in)) {
            return in;
        }
        return ByteBuffer.wrap(byteBufferToByteArray(in));
    }

    public static boolean wrapsFullArray(ByteBuffer byteBuffer) {
        return byteBuffer.hasArray() && byteBuffer.position() == 0
                && byteBuffer.arrayOffset() == 0
                && byteBuffer.remaining() == byteBuffer.capacity();
    }

    public static byte[] byteBufferToByteArray(ByteBuffer byteBuffer) {
        if (wrapsFullArray(byteBuffer)) {
            return byteBuffer.array();
        }
        byte[] target = new byte[byteBuffer.remaining()];
        byteBufferToByteArray(byteBuffer, target, 0);
        return target;
    }

    public static int byteBufferToByteArray(ByteBuffer byteBuffer,
            byte[] target, int offset) {
        int remaining = byteBuffer.remaining();
        System.arraycopy(byteBuffer.array(), byteBuffer.arrayOffset()
                + byteBuffer.position(), target, offset, remaining);
        return remaining;
    }
}

Related

1. needsThumbnail(BufferedImage image, int newSize)
2. newArgbBufferedImage(int width, int height)
3. overlapsPoints(BufferedImage inImage, int inX, int inY, int inWidth, int inHeight, Color inTextColour)
4. pack(List buffers, int elements, int size)
5. rescaleImage(BufferedImage img, int targetWidth, int targetHeight, Object hint)
6. sameSize(BufferedImage im1, BufferedImage im2)
7. scanForDuplicates(BufferedImage leftImage, BufferedImage[] images, int i, int[] order, int width, int height)
8. sizeOfBytes(ByteBuffer bytes)
9. sizeOfBytesMap(Map m)