Java ByteBuffer Capacity ensureCapacity(ByteBuffer existingBuffer, int newLength)

Description

Make sure that the ByteBuffer capacity is equal to or greater than the expected length.

License

Open Source License

Parameter

Parameter	Description
existingBuffer	ByteBuffer capacity to check
newLength	new length for the ByteBuffer. returns ByteBuffer with a minimum capacity of new length

Declaration

public static ByteBuffer ensureCapacity(ByteBuffer existingBuffer, int newLength) 

Method Source Code

//package com.java2s;
/**/*from   w  w  w.  j  a v a  2 s.c o  m*/
 * Copyright 2016 LinkedIn Corp. All rights reserved.
 *
 * Licensed 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.
 */

import java.nio.ByteBuffer;

public class Main {
    /**
     * Make sure that the ByteBuffer capacity is equal to or greater than the expected length.
     * If not, create a new ByteBuffer of expected length and copy contents from previous ByteBuffer to the new one
     * @param existingBuffer ByteBuffer capacity to check
     * @param newLength new length for the ByteBuffer.
     * returns ByteBuffer with a minimum capacity of new length
     */
    public static ByteBuffer ensureCapacity(ByteBuffer existingBuffer, int newLength) {
        if (newLength > existingBuffer.capacity()) {
            ByteBuffer newBuffer = ByteBuffer.allocate(newLength);
            existingBuffer.flip();
            newBuffer.put(existingBuffer);
            return newBuffer;
        }
        return existingBuffer;
    }
}

Related

1. borrowByteBuffer(final int capacity)
2. ensureCapacity(ByteBuffer buff, int len)
3. ensureCapacity(ByteBuffer buffer, int capacity)
4. ensureCapacity(ByteBuffer original, int newCapacity)
5. expand(ByteBuffer buffer, int newCapacity)
6. getByteBuffer(int capacity)
7. grow(ByteBuffer buffer, int minCapacityIncrease)