| 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.common; |
| 17 | |
| 18 | import org.qedeq.base.utility.EqualsUtility; |
| 19 | |
| 20 | /** |
| 21 | * One subject variable. This class is mainly used in the model area. |
| 22 | * For this kernel he normal form of a subject variable is an |
| 23 | * {@link org.qedeq.kernel.se.base.list.ElementList} |
| 24 | * with an {@link org.qedeq.kernel.se.base.list.Atom} with the name of the subject variable. |
| 25 | * |
| 26 | * @author Michael Meyling |
| 27 | */ |
| 28 | public class SubjectVariable { |
| 29 | |
| 30 | /** Text to identify the subject variable. */ |
| 31 | private final String name; |
| 32 | |
| 33 | /** |
| 34 | * Constructor. |
| 35 | * |
| 36 | * @param name Show this to represent the subject variable within outputs. |
| 37 | */ |
| 38 | public SubjectVariable(final String name) { |
| 39 | this.name = name; |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * Get subject variable name. |
| 44 | * |
| 45 | * @return Subject variable name. |
| 46 | */ |
| 47 | public String getName() { |
| 48 | return name; |
| 49 | } |
| 50 | |
| 51 | public int hashCode() { |
| 52 | return name.hashCode(); |
| 53 | } |
| 54 | |
| 55 | public boolean equals(final Object other) { |
| 56 | if (!(other instanceof SubjectVariable)) { |
| 57 | return false; |
| 58 | } |
| 59 | final SubjectVariable var = (SubjectVariable) other; |
| 60 | return EqualsUtility.equals(name, var.name); |
| 61 | } |
| 62 | |
| 63 | public String toString() { |
| 64 | return name; |
| 65 | } |
| 66 | |
| 67 | } |