package org.drools.examples.benchmarks.waltz;
/*
* $Id: WaltzWMEL.java,v 1.1 2004/12/15 15:13:41 dbarnett Exp $
*
* Copyright 2004 (C) The Werken Company. All Rights Reserved.
*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and
* notices. Redistributions must also contain a copy of this document.
*
* 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 name "drools" must not be used to endorse or promote products derived
* from this Software without prior written permission of The Werken Company.
* For written permission, please contact bob@werken.com.
*
* 4. Products derived from this Software may not be called "drools" nor may
* "drools" appear in their names without prior written permission of The Werken
* Company. "drools" is a registered trademark of The Werken Company.
*
* 5. Due credit should be given to The Werken Company.
* (http://drools.werken.com/).
*
* THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``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 WERKEN COMPANY 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.
*
*/
import java.util.HashSet;
import java.util.Set;
import org.drools.event.DefaultWorkingMemoryEventListener;
import org.drools.event.ObjectAssertedEvent;
import org.drools.event.ObjectModifiedEvent;
import org.drools.event.ObjectRetractedEvent;
import org.drools.examples.benchmarks.waltz.model.Edge;
import org.drools.examples.benchmarks.waltz.model.Junction;
import org.drools.examples.benchmarks.waltz.model.Line;
/**
* A <code>WorkingMemoryEventListener</code> used to simulate "not"
* functionality not currently supported by Drools.
*/
public class WaltzWMEL extends DefaultWorkingMemoryEventListener
{
private static int lineCount;
private static int joinedEdgeCount;
private static int plottedEdgeCount;
private static Set edgeSet = new HashSet( 512 );
private static int maxJunctionBasePoint = -1;
private static int minJunctionBasePoint = Integer.MAX_VALUE;
public void objectAsserted( ObjectAssertedEvent event )
{
Object object = event.getObject( );
if ( object instanceof Line )
{
++lineCount;
}
else if ( object instanceof Edge )
{
Edge edge = ( Edge ) object;
if ( edge.isJoined( ) )
{
++joinedEdgeCount;
}
if ( edge.isPlotted( ) )
{
++plottedEdgeCount;
}
edgeSet.add( edge.getP1( ) + ":" + edge.getP2( ) );
}
else if ( object instanceof Junction )
{
Junction junction = ( Junction ) object;
int basePoint = junction.getBasePoint( );
if ( basePoint > maxJunctionBasePoint )
{
maxJunctionBasePoint = basePoint;
}
if ( basePoint < minJunctionBasePoint )
{
minJunctionBasePoint = basePoint;
}
}
}
public void objectModified( ObjectModifiedEvent event )
{
Object oldObject = event.getOldObject( );
if ( oldObject instanceof Line )
{
--lineCount;
}
else if ( oldObject instanceof Edge )
{
Edge edge = ( Edge ) oldObject;
if ( edge.isJoined( ) )
{
--joinedEdgeCount;
}
if ( edge.isPlotted( ) )
{
--plottedEdgeCount;
}
}
Object newObject = event.getObject( );
if ( newObject instanceof Line )
{
++lineCount;
}
else if ( newObject instanceof Edge )
{
Edge edge = ( Edge ) newObject;
if ( edge.isJoined( ) )
{
++joinedEdgeCount;
}
if ( edge.isPlotted( ) )
{
++plottedEdgeCount;
}
}
}
public void objectRetracted( ObjectRetractedEvent event )
{
Object object = event.getOldObject();
if ( object instanceof Line )
{
--lineCount;
}
else if ( object instanceof Edge )
{
Edge edge = ( Edge ) object;
if ( edge.isJoined( ) )
{
--joinedEdgeCount;
}
if ( edge.isPlotted( ) )
{
--plottedEdgeCount;
}
}
}
public static boolean lineExists( )
{
return lineCount != 0;
}
public static boolean edgeExists( int p1, int p2a, int p2b )
{
if ( edgeSet.contains( p1 + ":" + p2a ) )
{
return true;
}
return ( edgeSet.contains( p1 + ":" + p2b ) );
}
public static boolean joinedEdgeExists( )
{
return joinedEdgeCount != 0;
}
public static boolean plottedEdgeExists( )
{
return plottedEdgeCount != 0;
}
public static boolean greaterJunctionExists( int basePoint )
{
return ( basePoint != maxJunctionBasePoint );
}
public static boolean smallerJunctionExists( int basePoint )
{
return ( basePoint != minJunctionBasePoint );
}
}