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 * Based on the original MiniSat specification from: 20 * 21 * An extensible SAT solver. Niklas Een and Niklas Sorensson. Proceedings of the 22 * Sixth International Conference on Theory and Applications of Satisfiability 23 * Testing, LNCS 2919, pp 502-518, 2003. 24 * 25 * See www.minisat.se for the original solver in C++. 26 * 27 *******************************************************************************/ 28 package org.sat4j.pb.constraints.pb; 29 30 import java.math.BigInteger; 31 32 import org.sat4j.minisat.constraints.cnf.OriginalHTClause; 33 import org.sat4j.minisat.core.ILits; 34 import org.sat4j.minisat.core.UnitPropagationListener; 35 import org.sat4j.specs.IVecInt; 36 37 public class OriginalHTClausePB extends OriginalHTClause implements PBConstr { 38 39 public OriginalHTClausePB(IVecInt ps, ILits voc) { 40 super(ps, voc); 41 } 42 43 /** 44 * 45 */ 46 private static final long serialVersionUID = 1L; 47 48 public IVecInt computeAnImpliedClause() { 49 return null; 50 } 51 52 public BigInteger getCoef(int literal) { 53 return BigInteger.ONE; 54 } 55 56 public BigInteger[] getCoefs() { 57 BigInteger[] tmp = new BigInteger[size()]; 58 for (int i = 0; i < tmp.length; i++) 59 tmp[i] = BigInteger.ONE; 60 return tmp; 61 } 62 63 public BigInteger getDegree() { 64 return BigInteger.ONE; 65 } 66 67 /** 68 * Creates a brand new clause, presumably from external data. Performs all 69 * sanity checks. 70 * 71 * @param s 72 * the object responsible for unit propagation 73 * @param voc 74 * the vocabulary 75 * @param literals 76 * the literals to store in the clause 77 * @return the created clause or null if the clause should be ignored 78 * (tautology for example) 79 */ 80 public static OriginalHTClausePB brandNewClause(UnitPropagationListener s, 81 ILits voc, IVecInt literals) { 82 OriginalHTClausePB c = new OriginalHTClausePB(literals, voc); 83 c.register(); 84 return c; 85 } 86 87 }