| 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.qedeq.base.utility.EqualsUtility; |
| 19 | import org.qedeq.kernel.se.base.module.Conclusion; |
| 20 | import org.qedeq.kernel.se.base.module.Formula; |
| 21 | |
| 22 | |
| 23 | /** |
| 24 | * Conclusion that is derived from an an assumption within a proof. |
| 25 | * |
| 26 | * @author Michael Meyling |
| 27 | */ |
| 28 | public class ConclusionVo implements Conclusion { |
| 29 | |
| 30 | /** Label for back references. Might be <code>null</code>. */ |
| 31 | private String label; |
| 32 | |
| 33 | /** Derived formula. */ |
| 34 | private Formula formula; |
| 35 | |
| 36 | /** |
| 37 | * Constructs an proof line. |
| 38 | * |
| 39 | * @param formula New derived formula. |
| 40 | */ |
| 41 | public ConclusionVo(final Formula formula) { |
| 42 | this.label = null; |
| 43 | this.formula = formula; |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * Constructs an proof line. |
| 48 | * |
| 49 | * @param label Label for back references. Might be <code>null</code>. |
| 50 | * @param formula New derived formula. |
| 51 | */ |
| 52 | public ConclusionVo(final String label, final Formula formula) { |
| 53 | this.label = label; |
| 54 | this.formula = formula; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Default constructor. |
| 59 | */ |
| 60 | public ConclusionVo() { |
| 61 | // nothing to do |
| 62 | } |
| 63 | |
| 64 | public Formula getFormula() { |
| 65 | return formula; |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Set proof line formula. |
| 70 | * |
| 71 | * @param formula Set formula. |
| 72 | */ |
| 73 | public void setFormula(final Formula formula) { |
| 74 | this.formula = formula; |
| 75 | } |
| 76 | |
| 77 | public String getLabel() { |
| 78 | return label; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Set label for proof line. |
| 83 | * |
| 84 | * @param label Set this label. |
| 85 | */ |
| 86 | public void setLabel(final String label) { |
| 87 | this.label = label; |
| 88 | } |
| 89 | |
| 90 | public boolean equals(final Object obj) { |
| 91 | if (!(obj instanceof ConclusionVo)) { |
| 92 | return false; |
| 93 | } |
| 94 | final ConclusionVo other = (ConclusionVo) obj; |
| 95 | return EqualsUtility.equals(label, other.label) |
| 96 | && EqualsUtility.equals(formula, other.formula); |
| 97 | } |
| 98 | |
| 99 | public int hashCode() { |
| 100 | return (label != null ? label.hashCode() : 0) |
| 101 | ^ (formula != null ? 1 ^ formula.hashCode() : 0); |
| 102 | } |
| 103 | |
| 104 | public String toString() { |
| 105 | return (label != null ? "[" + label + "] " : " ") + getFormula() + " " |
| 106 | + "Conclusion"; |
| 107 | } |
| 108 | |
| 109 | } |