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A fork of the http://www.mediawiki.org/wiki/Mwdumper

The newest version!

/*
 * MediaWiki import/export processing tools
 * Copyright (C) 2005 by Brion Vibber
 *
 * 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.
 *
 * $Id: Buffer.java 11515 2005-10-26 09:33:48Z vibber $
 */

package org.dkpro.jwpl.mwdumper.importer;

import java.util.IdentityHashMap;

public final class Buffer
{

    private Buffer()
    {
    }

    private static final IdentityHashMap BUFFERS = new IdentityHashMap<>();

    private static Thread lastThread;
    private static char[] lastBuffer;

    public static synchronized char[] get(int capacity)
    {
        final Thread thread = Thread.currentThread();
        char[] buffer;

        if (lastThread == thread) {
            buffer = lastBuffer;
        }
        else {
            lastThread = thread;
            buffer = lastBuffer = BUFFERS.get(thread);
        }

        if (buffer == null) {
            buffer = lastBuffer = new char[capacity];
            BUFFERS.put(thread, buffer);
        }
        else if (buffer.length < capacity) {
            int newsize = buffer.length * 2;
            if (newsize < capacity)
                newsize = capacity;

            buffer = lastBuffer = new char[newsize];
            BUFFERS.put(thread, buffer);
        }

        return buffer;
    }
}