/* An ontology lattice.
Copyright (c) 1997-2009 The Regents of the University of California.
All rights reserved.
Permission is hereby granted, without written agreement and without
license or royalty fees, to use, copy, modify, and distribute this
software and its documentation for any purpose, provided that the above
copyright notice and the following two paragraphs appear in all copies
of this software.
IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
ENHANCEMENTS, OR MODIFICATIONS.
PT_COPYRIGHT_VERSION_2
COPYRIGHTENDKEY
*/
package ptolemy.data.properties.lattice.academicFalseTrueEqualPriority;
import ptolemy.data.properties.Property;
import ptolemy.data.properties.lattice.PropertyLattice;
//////////////////////////////////////////////////////////////////////////
//// Lattice
/**
Property hierarchy base class.
Note that all public methods are synchronized.
There are more than one instances of a property lattice.
Although the property lattice is constructed once and then typically
does not change during execution, the methods need to be synchronized
because there are various data structures used to cache results that
are expensive to compute. These data structures do change during
execution. Multiple threads may be accessing the property lattice
simultaneously and modifying these data structures. To ensure
thread safety, the methods need to be synchronized.
@author Thomas Mandl, Man-Kit Leung, Edward A. Lee
@version $Id$
@since Ptolemy II 7.1
@Pt.ProposedRating Red (mankit)
@Pt.AcceptedRating Red (mankit)
*/
public class Lattice extends PropertyLattice {
/** Construct a new ontology lattice. */
public Lattice() {
super();
addNodeWeight(CONFLICT);
addNodeWeight(TRUE);
addNodeWeight(FALSE);
addNodeWeight(UNKNOWN);
addEdge(UNKNOWN, FALSE);
addEdge(UNKNOWN, TRUE);
addEdge(FALSE, CONFLICT);
addEdge(TRUE, CONFLICT);
if (!isLattice()) {
throw new AssertionError("This ontology is not a lattice.");
}
}
///////////////////////////////////////////////////////////////////
//// private variables ////
public Property CONFLICT = new Conflict(this);
public Property TRUE = new True(this);
public Property FALSE = new False(this);
public Property UNKNOWN = new Unknown(this);
}