1 /*******************************************************************************
2 * SAT4J: a SATisfiability library for Java Copyright (C) 2004-2008 Daniel Le Berre
3 *
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
8 *
9 * Alternatively, the contents of this file may be used under the terms of
10 * either the GNU Lesser General Public License Version 2.1 or later (the
11 * "LGPL"), in which case the provisions of the LGPL are applicable instead
12 * of those above. If you wish to allow use of your version of this file only
13 * under the terms of the LGPL, and not to allow others to use your version of
14 * this file under the terms of the EPL, indicate your decision by deleting
15 * the provisions above and replace them with the notice and other provisions
16 * required by the LGPL. If you do not delete the provisions above, a recipient
17 * may use your version of this file under the terms of the EPL or the LGPL.
18 *******************************************************************************/
19 package org.sat4j.maxsat;
20
21 import org.sat4j.core.ASolverFactory;
22 import org.sat4j.minisat.constraints.MixedDataStructureDanielWL;
23 import org.sat4j.minisat.core.DataStructureFactory;
24 import org.sat4j.minisat.core.SearchParams;
25 import org.sat4j.minisat.core.Solver;
26 import org.sat4j.minisat.learning.MiniSATLearning;
27 import org.sat4j.minisat.orders.VarOrderHeap;
28 import org.sat4j.minisat.restarts.MiniSATRestarts;
29 import org.sat4j.minisat.uip.FirstUIP;
30 import org.sat4j.pb.IPBSolver;
31
32 public class SolverFactory extends ASolverFactory<IPBSolver> {
33
34 private static final long serialVersionUID = 1L;
35
36 /**
37 * Builds a SAT solver for the MAX sat evaluation. Full clause learning, no
38 * restarts,
39 *
40 * @return a
41 */
42 public static Solver<DataStructureFactory> newMiniMaxSAT() {
43 MiniSATLearning<DataStructureFactory> learning = new MiniSATLearning<DataStructureFactory>();
44 Solver<DataStructureFactory> solver = new Solver<DataStructureFactory>(new FirstUIP(), learning,
45 new MixedDataStructureDanielWL(), new SearchParams(1.2,
46 100000), new VarOrderHeap(),
47 new MiniSATRestarts());
48 learning.setDataStructureFactory(solver.getDSFactory());
49 learning.setVarActivityListener(solver);
50 return solver;
51 }
52
53 @Override
54 public IPBSolver defaultSolver() {
55 return newDefault();
56 }
57
58 @Override
59 public IPBSolver lightSolver() {
60 return newLight();
61 }
62
63 public static IPBSolver newDefault() {
64 return org.sat4j.pb.SolverFactory.newDefault();
65 }
66
67 public static IPBSolver newLight() {
68 return org.sat4j.pb.SolverFactory.newLight();
69 }
70 }