com.liferay.portal.kernel.util.PrimitiveLongList.java Source code

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Here is the source code for com.liferay.portal.kernel.util.PrimitiveLongList.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.kernel.util;

/**
 * @author Michael C. Han
 */
public class PrimitiveLongList {

    public PrimitiveLongList() {
        _elements = new long[10];
    }

    public PrimitiveLongList(int capacity) {
        _elements = new long[capacity];
    }

    public void add(long value) {
        _checkCapacity(_elementsSize + 1);

        _elements[_elementsSize++] = value;
    }

    public void addAll(long[] values) {
        _checkCapacity(_elementsSize + values.length);

        System.arraycopy(values, 0, _elements, _elementsSize, values.length);

        _elementsSize += values.length;
    }

    public long[] getArray() {
        _trim();

        return _elements;
    }

    public int size() {
        return _elementsSize;
    }

    private void _checkCapacity(int minSize) {
        int oldSize = _elements.length;

        if (minSize > oldSize) {
            long[] previousElements = _elements;

            int newCapacity = (oldSize * 3) / 2 + 1;

            if (newCapacity < minSize) {
                newCapacity = minSize;
            }

            _elements = new long[newCapacity];

            System.arraycopy(previousElements, 0, _elements, 0, _elementsSize);
        }
    }

    private void _trim() {
        int oldSize = _elements.length;

        if (_elementsSize < oldSize) {
            long[] previousElements = _elements;

            _elements = new long[_elementsSize];

            System.arraycopy(previousElements, 0, _elements, 0, _elementsSize);
        }
    }

    private long[] _elements;
    private int _elementsSize;

}