- /*
- * 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