| 1 | /* This file is part of the project "Hilbert II" - http://www.qedeq.org |
| 2 | * |
| 3 | * Copyright 2000-2014, Michael Meyling <mime@qedeq.org>. |
| 4 | * |
| 5 | * "Hilbert II" is free software; you can redistribute |
| 6 | * it and/or modify it under the terms of the GNU General Public |
| 7 | * License as published by the Free Software Foundation; either |
| 8 | * version 2 of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | package org.qedeq.kernel.bo.logic.proof.finder; |
| 17 | |
| 18 | import org.qedeq.base.utility.EqualsUtility; |
| 19 | import org.qedeq.kernel.se.base.module.ModusPonens; |
| 20 | |
| 21 | |
| 22 | /** |
| 23 | * Modes Ponens usage. |
| 24 | * |
| 25 | * @author Michael Meyling |
| 26 | */ |
| 27 | public class ModusPonensBo implements ModusPonens { |
| 28 | |
| 29 | /** Reference to a formula like A -> B. */ |
| 30 | private int n1; |
| 31 | |
| 32 | /** Usually reference to a formula like A. */ |
| 33 | private int n2; |
| 34 | |
| 35 | /** |
| 36 | * Constructs a Modus Ponens argument. |
| 37 | * |
| 38 | * @param n1 Usually reference to a formula like A -> B. |
| 39 | * @param n2 Usually reference to a formula like A. |
| 40 | */ |
| 41 | public ModusPonensBo(final int n1, final int n2) { |
| 42 | this.n1 = n1; |
| 43 | this.n2 = n2; |
| 44 | } |
| 45 | |
| 46 | public ModusPonens getModusPonens() { |
| 47 | return this; |
| 48 | } |
| 49 | |
| 50 | public String getReference1() { |
| 51 | return "" + n1; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Set first formula reference. |
| 56 | * |
| 57 | * @param n1 Reference to formula. |
| 58 | */ |
| 59 | public void setN1(final int n1) { |
| 60 | this.n1 = n1; |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Get first formula reference. |
| 65 | * |
| 66 | * @return Reference to formula. |
| 67 | */ |
| 68 | public int getN1() { |
| 69 | return n1; |
| 70 | } |
| 71 | |
| 72 | public String getReference2() { |
| 73 | return "" + n2; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Set second formula reference. |
| 78 | * |
| 79 | * @param n2 Reference to formula. |
| 80 | */ |
| 81 | public void setN2(final int n2) { |
| 82 | this.n2 = n2; |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Get second formula reference. |
| 87 | * |
| 88 | * @return Reference to formula. |
| 89 | */ |
| 90 | public int getN2() { |
| 91 | return n2; |
| 92 | } |
| 93 | |
| 94 | public String[] getReferences() { |
| 95 | return new String[] {getReference1(), getReference2()}; |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * Get references to previous lines. |
| 100 | * |
| 101 | * @return List of references. |
| 102 | */ |
| 103 | public int[] getLines() { |
| 104 | return new int[] {getN1(), getN2()}; |
| 105 | } |
| 106 | |
| 107 | public boolean equals(final Object obj) { |
| 108 | if (!(obj instanceof ModusPonens)) { |
| 109 | return false; |
| 110 | } |
| 111 | final ModusPonens other = (ModusPonens) obj; |
| 112 | return EqualsUtility.equals(getReference1(), other.getReference1()) |
| 113 | && EqualsUtility.equals(getReference2(), other.getReference2()); |
| 114 | } |
| 115 | |
| 116 | public int hashCode() { |
| 117 | return getReference1().hashCode() ^ getReference2().hashCode(); |
| 118 | } |
| 119 | |
| 120 | public String toString() { |
| 121 | StringBuffer result = new StringBuffer(); |
| 122 | result.append("MP"); |
| 123 | result.append(" ("); |
| 124 | if (getReference1() != null) { |
| 125 | result.append(getReference1()); |
| 126 | } |
| 127 | if (getReference2() != null) { |
| 128 | if (getReference1() != null) { |
| 129 | result.append(", "); |
| 130 | } |
| 131 | result.append(getReference2()); |
| 132 | } |
| 133 | result.append(")"); |
| 134 | return result.toString(); |
| 135 | } |
| 136 | |
| 137 | public String getName() { |
| 138 | return "MP"; |
| 139 | } |
| 140 | |
| 141 | } |