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| AssertingClauseGenerator | Line # 38 | 0 | 1 | - |
-1.0
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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.minisat.core; | |
| 27 | ||
| 28 | import org.sat4j.specs.IConstr; | |
| 29 | ||
| 30 | /** | |
| 31 | * An assertingClauseGenerator is responsible for the creation of an asserting | |
| 32 | * clause during conflict analysis. An asserting clause is a clause that will | |
| 33 | * become unit when the solver will backtrack to the latest decision level, | |
| 34 | * providing a nice way for the solver to backtrack. | |
| 35 | * | |
| 36 | * @author leberre | |
| 37 | */ | |
| 38 | public interface AssertingClauseGenerator { | |
| 39 | ||
| 40 | /** | |
| 41 | * hook method called before the analysis. | |
| 42 | */ | |
| 43 | void initAnalyze(); | |
| 44 | ||
| 45 | /** | |
| 46 | * hook method called when a literal from the current decision lelvel is | |
| 47 | * found. | |
| 48 | * | |
| 49 | * @param p | |
| 50 | * the literal in the current decision level | |
| 51 | */ | |
| 52 | void onCurrentDecisionLevelLiteral(int p); | |
| 53 | ||
| 54 | /** | |
| 55 | * method indicating if an asserting clause has been built. note that this | |
| 56 | * method is called right after a resolution step is finished. | |
| 57 | * | |
| 58 | * @param reason | |
| 59 | * the reason of the current literal assignment | |
| 60 | * @return false iff the current clause is assertive | |
| 61 | */ | |
| 62 | boolean clauseNonAssertive(IConstr reason); | |
| 63 | } | |
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