/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999-2002 The Apache Software Foundation. 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
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* 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 APACHE SOFTWARE FOUNDATION 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.apache.org. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package com.sun.org.apache.xerces.internal.dom;
/** Internal class LCount is used to track the number of
listeners registered for a given event name, as an entry
in a global hashtable. This should allow us to avoid generating,
or discard, events for which no listeners are registered.
***** There should undoubtedly be methods here to manipulate
this table. At the moment that code's residing in NodeImpl.
Move it when we have a chance to do so. Sorry; we were
rushed.
***** Also, I'm currently asking "are there any listeners"
by testing captures+bubbles+defaults =? 0. It would probably
make sense to have a separate "total" field, calculated at
add/remove, to save a few cycles during dispatch. Fix.
???? CONCERN: Hashtables are known to be "overserialized" in
current versions of Java. That may impact performance.
???? CONCERN: The hashtable should probably be a per-document object.
Finer granularity would be even better, but would cost more cycles to
resolve and might not save enough event traffic to be worth the investment.
*/
/**
* @version $Id: LCount.java,v 1.6 2003/05/08 19:52:40 elena Exp $
*/
class LCount
{
static java.util.Hashtable lCounts=new java.util.Hashtable();
public int captures=0,bubbles=0,defaults=0;
static LCount lookup(String evtName)
{
LCount lc=(LCount)lCounts.get(evtName);
if(lc==null)
lCounts.put(evtName,(lc=new LCount()));
return lc;
}
} // class LCount
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