Mercurial > hg > blitz_stable
view src/com/go/trove/util/DeflaterPool.java @ 32:243c74d599bf
Update ignores
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 12 Jun 2010 10:41:47 +0100 |
parents | 3dc0c5604566 |
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/* ==================================================================== * Trove - Copyright (c) 1997-2001 Walt Disney Internet Group * ==================================================================== * The Tea Software License, Version 1.1 * * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, * if any, must include the following acknowledgment: * "This product includes software developed by the * Walt Disney Internet Group (http://opensource.go.com/)." * Alternately, this acknowledgment may appear in the software itself, * if and wherever such third-party acknowledgments normally appear. * * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must * not be used to endorse or promote products derived from this * software without prior written permission. For written * permission, please contact opensource@dig.com. * * 5. Products derived from this software may not be called "Tea", * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior * written permission of the Walt Disney Internet Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * For more information about Tea, please see http://opensource.go.com/. */ package com.go.trove.util; import java.util.*; /****************************************************************************** * Since {@link Deflater Deflaters} can be expensive to allocate, re-use them * with this pool. * * @author Brian S O'Neill * @version * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 01/06/14 <!-- $--> */ public class DeflaterPool { private static final int LIMIT; private static List cPool; private static List cNoWrapPool; static { LIMIT = Integer.getInteger("com.go.trove.util.DeflaterPool.LIMIT", 8).intValue(); } public static synchronized void clear() { if (cPool != null) { Iterator it = cPool.iterator(); while (it.hasNext()) { ((Deflater)it.next()).end(); } cPool = null; } if (cNoWrapPool != null) { Iterator it = cNoWrapPool.iterator(); while (it.hasNext()) { ((Deflater)it.next()).end(); } cNoWrapPool = null; } } public static synchronized Deflater get(int level, boolean nowrap) { List pool; if (nowrap) { if ((pool = cNoWrapPool) == null) { return new Deflater(level, true); } } else { if ((pool = cPool) == null) { return new Deflater(level, false); } } if (pool.isEmpty()) { return new Deflater(level, nowrap); } Deflater d = (Deflater)pool.remove(pool.size() - 1); d.setLevel(level); d.setStrategy(Deflater.DEFAULT_STRATEGY); return d; } public static Deflater get(int level) { return get(level, false); } public static Deflater get() { return get(Deflater.DEFAULT_COMPRESSION, false); } public static synchronized void put(Deflater d) { d.reset(); List pool; if (d.isNoWrap()) { if ((pool = cNoWrapPool) == null) { pool = cNoWrapPool = new ArrayList(LIMIT); } } else { if ((pool = cPool) == null) { pool = cPool = new ArrayList(LIMIT); } } if (pool.size() < LIMIT) { pool.add(d); } else { d.end(); } } }