pjs/grendel/calypso/util/HashtableRecycler.java

118 строки
2.7 KiB
Java
Исходник Обычный вид История

1998-09-09 04:52:38 +04:00
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil -*-
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Grendel mail/news client.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are Copyright (C) 1997
* Netscape Communications Corporation. All Rights Reserved.
*/
package calypso.util;
import java.util.*;
/**
* Static recycler class for java.util.Hashtable
*
* @author psl 04-23-97 6:48pm
*/
public final class HashtableRecycler
{
static Recycler gRecycler;
/**
* Get one
*
* @return
* @exception
* @author psl 04-23-97 6:49pm
*/
public static synchronized Hashtable Alloc ()
{
Hashtable result = null;
if (null != gRecycler)
result = (Hashtable)gRecycler.getRecycledObject ();
if (null == result)
result = new Hashtable ();
return result;
}
/**
* Get one with an initial size
* <I>since the growth mechanism is private (for now) a recycled
* table won't really grow to capacity</I>
*
* @param aCapacity desired initial capacity
* @return
* @exception
* @author psl 04-23-97 6:49pm
*/
public static synchronized Hashtable Alloc (int aCapacity)
{
Hashtable result = null;
if (null != gRecycler)
result = (Hashtable)gRecycler.getRecycledObject ();
if (null == result)
result = new Hashtable (aCapacity);
return result;
}
/**
* Recycle a hashtable
* (it will be cleared by the recycler)
*
* @param aTable table to be recycled
* @return
* @exception
* @author psl 04-23-97 6:50pm
*/
public static synchronized void Recycle (Hashtable aTable)
{
if (null == gRecycler)
gRecycler = new Recycler ();
aTable.clear ();
gRecycler.recycle (aTable);
}
/**
* Empty the recycler, it's earth day
*
* @param
* @return
* @exception
* @author psl 04-21-97 4:29pm
*/
static synchronized public void EmptyRecycler ()
{
if (null != gRecycler)
gRecycler.empty ();
}
/**
* finalize class for unloading
*
* @param
* @return
* @exception
* @author psl 04-21-97 4:29pm
*/
static void classFinalize () throws Throwable
{
// Poof! Now we are unloadable even though we have a static
// variable.
}
}