public void toClause(ISolver solver, IVec<Var> scope, IVec<Evaluable> vars)
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| 1 | /* | |
| 2 | * SAT4J: a SATisfiability library for Java Copyright (C) 2004-2006 Daniel Le Berre | |
| 3 | * | |
| 4 | * Based on the original minisat specification from: | |
| 5 | * | |
| 6 | * An extensible SAT solver. Niklas E?n and Niklas S?rensson. Proceedings of the | |
| 7 | * Sixth International Conference on Theory and Applications of Satisfiability | |
| 8 | * Testing, LNCS 2919, pp 502-518, 2003. | |
| 9 | * | |
| 10 | * This library is free software; you can redistribute it and/or modify it under | |
| 11 | * the terms of the GNU Lesser General Public License as published by the Free | |
| 12 | * Software Foundation; either version 2.1 of the License, or (at your option) | |
| 13 | * any later version. | |
| 14 | * | |
| 15 | * This library is distributed in the hope that it will be useful, but WITHOUT | |
| 16 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
| 17 | * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more | |
| 18 | * details. | |
| 19 | * | |
| 20 | * You should have received a copy of the GNU Lesser General Public License | |
| 21 | * along with this library; if not, write to the Free Software Foundation, Inc., | |
| 22 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 23 | * | |
| 24 | */ | |
| 25 | ||
| 26 | package org.sat4j.reader.csp; | |
| 27 | ||
| 28 | import org.sat4j.core.VecInt; | |
| 29 | import org.sat4j.specs.ContradictionException; | |
| 30 | import org.sat4j.specs.ISolver; | |
| 31 | import org.sat4j.specs.IVec; | |
| 32 | import org.sat4j.specs.IVecInt; | |
| 33 | ||
| 34 | public class AllDiff implements Clausifiable { | |
| 35 | ||
| 36 | 0 |
public void toClause(ISolver solver, IVec<Var> scope, IVec<Evaluable> vars) |
| 37 | throws ContradictionException { | |
| 38 | 0 | int n = scope.size(); |
| 39 | 0 | IVecInt clause = new VecInt(); |
| 40 | 0 | for (int i = 0; i < n; i++) { |
| 41 | 0 | Var vi = scope.get(i); |
| 42 | 0 | for (int j = i + 1; j < n; j++) { |
| 43 | // make all values differents | |
| 44 | 0 | Var vj = scope.get(j); |
| 45 | 0 | for (int vali : vi.domain()) { |
| 46 | 0 | for (int valj : vj.domain()) { |
| 47 | // the two variables share a common value | |
| 48 | 0 | if (vali == valj) { |
| 49 | 0 | clause.push(-vi.translate(vali)); |
| 50 | 0 | clause.push(-vj.translate(valj)); |
| 51 | 0 | solver.addClause(clause); |
| 52 | 0 | clause.clear(); |
| 53 | } | |
| 54 | } | |
| 55 | } | |
| 56 | } | |
| 57 | } | |
| 58 | } | |
| 59 | ||
| 60 | } | |
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