| 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.se.dto.module; |
| 17 | |
| 18 | import org.apache.commons.lang.ArrayUtils; |
| 19 | import org.qedeq.base.utility.EqualsUtility; |
| 20 | import org.qedeq.kernel.se.base.module.Conclusion; |
| 21 | import org.qedeq.kernel.se.base.module.ConditionalProof; |
| 22 | import org.qedeq.kernel.se.base.module.FormalProofLineList; |
| 23 | import org.qedeq.kernel.se.base.module.Formula; |
| 24 | import org.qedeq.kernel.se.base.module.Hypothesis; |
| 25 | import org.qedeq.kernel.se.base.module.Reason; |
| 26 | |
| 27 | |
| 28 | /** |
| 29 | * Usage of conditional proof method. If you can derive the proposition A out of |
| 30 | * the assumed formulas then the following formula is true: |
| 31 | * conjunction of the assumed formulas implies A. |
| 32 | * |
| 33 | * @author Michael Meyling |
| 34 | */ |
| 35 | public class ConditionalProofVo implements ConditionalProof { |
| 36 | |
| 37 | /** Hypothesis. */ |
| 38 | private Hypothesis hypothesis; |
| 39 | |
| 40 | /** Proof lines term. */ |
| 41 | private FormalProofLineList formalProofLineList; |
| 42 | |
| 43 | /** Conclusion. */ |
| 44 | private Conclusion conclusion; |
| 45 | |
| 46 | /** |
| 47 | * Constructs an reason. |
| 48 | * |
| 49 | * @param hypothesis Free subject variable that will be replaced. |
| 50 | * @param proofLines Bound subject variable that will be substituted. |
| 51 | * @param conclusion Conclusion. |
| 52 | */ |
| 53 | public ConditionalProofVo(final Hypothesis hypothesis, final FormalProofLineList proofLines, |
| 54 | final Conclusion conclusion) { |
| 55 | this.hypothesis = hypothesis; |
| 56 | this.formalProofLineList = proofLines; |
| 57 | this.conclusion = conclusion; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Default constructor. |
| 62 | */ |
| 63 | public ConditionalProofVo() { |
| 64 | // nothing to do |
| 65 | } |
| 66 | |
| 67 | public ConditionalProof getConditionalProof() { |
| 68 | return this; |
| 69 | } |
| 70 | |
| 71 | public Hypothesis getHypothesis() { |
| 72 | return hypothesis; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Set hypothesis. |
| 77 | * |
| 78 | * @param hypothesis Reference to formula. |
| 79 | */ |
| 80 | public void setHypothesis(final Hypothesis hypothesis) { |
| 81 | this.hypothesis = hypothesis; |
| 82 | } |
| 83 | |
| 84 | public String[] getReferences() { |
| 85 | return ArrayUtils.EMPTY_STRING_ARRAY; |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Set formal proof lines. |
| 90 | * |
| 91 | * @param list Proof lines that might use hypothesis. |
| 92 | */ |
| 93 | public void setFormalProofLineList(final FormalProofLineList list) { |
| 94 | this.formalProofLineList = list; |
| 95 | } |
| 96 | |
| 97 | public FormalProofLineList getFormalProofLineList() { |
| 98 | return formalProofLineList; |
| 99 | } |
| 100 | |
| 101 | public Conclusion getConclusion() { |
| 102 | return conclusion; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Set conclusion. |
| 107 | * |
| 108 | * @param conclusion New derived formula. |
| 109 | */ |
| 110 | public void setConclusion(final Conclusion conclusion) { |
| 111 | this.conclusion = conclusion; |
| 112 | } |
| 113 | |
| 114 | public Formula getFormula() { |
| 115 | if (conclusion == null) { |
| 116 | return null; |
| 117 | } |
| 118 | return conclusion.getFormula(); |
| 119 | } |
| 120 | |
| 121 | public String getLabel() { |
| 122 | if (conclusion == null) { |
| 123 | return null; |
| 124 | } |
| 125 | return conclusion.getLabel(); |
| 126 | } |
| 127 | |
| 128 | public String getName() { |
| 129 | return "CP"; |
| 130 | } |
| 131 | |
| 132 | public Reason getReason() { |
| 133 | return this; |
| 134 | } |
| 135 | |
| 136 | public boolean equals(final Object obj) { |
| 137 | if (!(obj instanceof ConditionalProofVo)) { |
| 138 | return false; |
| 139 | } |
| 140 | final ConditionalProofVo other = (ConditionalProofVo) obj; |
| 141 | return EqualsUtility.equals(hypothesis, other.hypothesis) |
| 142 | && EqualsUtility.equals(formalProofLineList, other.formalProofLineList) |
| 143 | && EqualsUtility.equals(conclusion, other.conclusion); |
| 144 | } |
| 145 | |
| 146 | public int hashCode() { |
| 147 | return (hypothesis != null ? hypothesis.hashCode() : 0) |
| 148 | ^ (formalProofLineList != null ? 2 ^ formalProofLineList.hashCode() : 0) |
| 149 | ^ (conclusion != null ? 4 ^ conclusion.hashCode() : 0); |
| 150 | } |
| 151 | |
| 152 | public String toString() { |
| 153 | StringBuffer result = new StringBuffer(); |
| 154 | result.append(getName()); |
| 155 | if (hypothesis != null || formalProofLineList != null || conclusion != null) { |
| 156 | result.append(" ("); |
| 157 | if (hypothesis != null) { |
| 158 | result.append("\n"); |
| 159 | result.append(hypothesis); |
| 160 | } |
| 161 | if (formalProofLineList != null) { |
| 162 | result.append("\n"); |
| 163 | result.append(formalProofLineList); |
| 164 | } |
| 165 | if (conclusion != null) { |
| 166 | result.append("\n"); |
| 167 | result.append(conclusion); |
| 168 | } |
| 169 | result.append("\n"); |
| 170 | result.append(")"); |
| 171 | } |
| 172 | return result.toString(); |
| 173 | } |
| 174 | |
| 175 | } |