org.sat4j.csp.constraints.Nogoods Maven / Gradle / Ivy
/*******************************************************************************
* SAT4J: a SATisfiability library for Java Copyright (C) 2004-2008 Daniel Le Berre
*
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* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
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*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU Lesser General Public License Version 2.1 or later (the
* "LGPL"), in which case the provisions of the LGPL are applicable instead
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* under the terms of the LGPL, and not to allow others to use your version of
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package org.sat4j.csp.constraints;
import org.sat4j.core.VecInt;
import org.sat4j.csp.Evaluable;
import org.sat4j.csp.Var;
import org.sat4j.specs.ContradictionException;
import org.sat4j.specs.ISolver;
import org.sat4j.specs.IVec;
import org.sat4j.specs.IVecInt;
public class Nogoods implements Relation {
private final int[][] tuples;
private final int arity;
public Nogoods(int arity, int nbtuples) {
tuples = new int[nbtuples][];
this.arity = arity;
}
public void addTuple(int index, int[] tuple) {
tuples[index] = tuple;
}
public void toClause(ISolver solver, IVec scope, IVec vars)
throws ContradictionException {
IVecInt clause = new VecInt();
for (int i = 0; i < tuples.length; i++) {
clause.clear();
for (int j = 0; j < scope.size(); j++) {
clause.push(-scope.get(j).translate(tuples[i][j]));
}
solver.addClause(clause);
}
}
public int arity() {
return arity;
}
}