/* jCAE stand for Java Computer Aided Engineering. Features are : Small CAD
modeler, Finite element mesher, Plugin architecture.
Copyright (C) 2009, by EADS France
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
package org.jcae.mesh.bora.ds;
import gnu.trove.strategy.HashingStrategy;
import org.jcae.mesh.cad.CADShape;
// In OccJava, two CADShape instances can be equal with different orientations.
// We sometimes need to keep track of shape orientation in our graph, hash
// sets and maps can then use an KeepOrientationHashingStrategy INSTANCE as hashing
// strategy.
class KeepOrientationHashingStrategy implements HashingStrategy<CADShape>
{
private static final long serialVersionUID = -8044550982617929038L;
// We need only one instance, make this class a Singleton.
private static final KeepOrientationHashingStrategy INSTANCE = new KeepOrientationHashingStrategy();
private KeepOrientationHashingStrategy() {}
static KeepOrientationHashingStrategy getInstance()
{
return INSTANCE;
}
public final int computeHashCode(CADShape o)
{
return o.hashCode();
}
public final boolean equals(CADShape s1, CADShape s2)
{
return s1 != null && s1.equals(s2) && s1.orientation() == s2.orientation();
}
}