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.xml.handler.module; |
17 | |
18 | import org.qedeq.kernel.se.base.module.Axiom; |
19 | import org.qedeq.kernel.se.dto.module.AxiomVo; |
20 | import org.qedeq.kernel.xml.common.XmlSyntaxException; |
21 | import org.qedeq.kernel.xml.handler.common.AbstractSimpleHandler; |
22 | import org.qedeq.kernel.xml.handler.common.SimpleAttributes; |
23 | |
24 | |
25 | /** |
26 | * Parse an axiom. |
27 | * |
28 | * @version $Revision: 1.1 $ |
29 | * @author Michael Meyling |
30 | */ |
31 | public class AxiomHandler extends AbstractSimpleHandler { |
32 | |
33 | /** Handler for axiom formula. */ |
34 | private final FormulaHandler formulaHandler; |
35 | |
36 | /** Handler for rule description. */ |
37 | private final LatexListHandler descriptionHandler; |
38 | |
39 | /** Axiom value object. */ |
40 | private AxiomVo axiom; |
41 | |
42 | /** |
43 | * Deals with axioms. |
44 | * |
45 | * @param handler Parent handler. |
46 | */ |
47 | public AxiomHandler(final AbstractSimpleHandler handler) { |
48 | super(handler, "AXIOM"); |
49 | formulaHandler = new FormulaHandler(this); |
50 | descriptionHandler = new LatexListHandler(this, "DESCRIPTION"); |
51 | } |
52 | |
53 | public final void init() { |
54 | axiom = null; |
55 | } |
56 | |
57 | /** |
58 | * Get axiom. |
59 | * |
60 | * @return Axiom. |
61 | */ |
62 | public final Axiom getAxiom() { |
63 | return axiom; |
64 | } |
65 | |
66 | public final void startElement(final String name, final SimpleAttributes attributes) |
67 | throws XmlSyntaxException { |
68 | if (getStartTag().equals(name)) { |
69 | axiom = new AxiomVo(); |
70 | axiom.setDefinedOperator(attributes.getString("definedOperator")); |
71 | } else if (formulaHandler.getStartTag().equals(name)) { |
72 | changeHandler(formulaHandler, name, attributes); |
73 | } else if (descriptionHandler.getStartTag().equals(name)) { |
74 | changeHandler(descriptionHandler, name, attributes); |
75 | } else { |
76 | throw XmlSyntaxException.createUnexpectedTagException(name); |
77 | } |
78 | } |
79 | |
80 | public final void endElement(final String name) throws XmlSyntaxException { |
81 | if (getStartTag().equals(name)) { |
82 | // nothing to do |
83 | } else if (formulaHandler.getStartTag().equals(name)) { |
84 | axiom.setFormula(formulaHandler.getFormula()); |
85 | } else if (descriptionHandler.getStartTag().equals(name)) { |
86 | axiom.setDescription(descriptionHandler.getLatexList()); |
87 | } else { |
88 | throw XmlSyntaxException.createUnexpectedTagException(name); |
89 | } |
90 | } |
91 | |
92 | } |