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.PredicateDefinition; |
19 | import org.qedeq.kernel.se.dto.module.PredicateDefinitionVo; |
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 a predicate definition. |
27 | * |
28 | * @author Michael Meyling |
29 | */ |
30 | public class PredicateDefinitionHandler extends AbstractSimpleHandler { |
31 | |
32 | /** Handler for formula. */ |
33 | private final FormulaHandler formulaHandler; |
34 | |
35 | /** Handler for rule description. */ |
36 | private final LatexListHandler descriptionHandler; |
37 | |
38 | /** Definition value object. */ |
39 | private PredicateDefinitionVo definition; |
40 | |
41 | /** LaTeX pattern for the definition. */ |
42 | private String latexPattern; |
43 | |
44 | |
45 | /** |
46 | * Deals with definitions. |
47 | * |
48 | * @param handler Parent handler. |
49 | */ |
50 | public PredicateDefinitionHandler(final AbstractSimpleHandler handler) { |
51 | super(handler, "DEFINITION_PREDICATE"); |
52 | formulaHandler = new FormulaHandler(this); |
53 | descriptionHandler = new LatexListHandler(this, "DESCRIPTION"); |
54 | } |
55 | |
56 | public final void init() { |
57 | definition = null; |
58 | latexPattern = null; |
59 | } |
60 | |
61 | /** |
62 | * Get definition. |
63 | * |
64 | * @return Definition. |
65 | */ |
66 | public final PredicateDefinition getDefinition() { |
67 | return definition; |
68 | } |
69 | |
70 | public final void startElement(final String name, final SimpleAttributes attributes) |
71 | throws XmlSyntaxException { |
72 | if (getStartTag().equals(name)) { |
73 | definition = new PredicateDefinitionVo(); |
74 | definition.setArgumentNumber(attributes.getString("arguments")); |
75 | definition.setName(attributes.getString("name")); |
76 | } else if ("LATEXPATTERN".equals(name)) { |
77 | // nothing to do yet |
78 | } else if (formulaHandler.getStartTag().equals(name)) { |
79 | changeHandler(formulaHandler, name, attributes); |
80 | } else if (descriptionHandler.getStartTag().equals(name)) { |
81 | changeHandler(descriptionHandler, name, attributes); |
82 | } else { |
83 | throw XmlSyntaxException.createUnexpectedTagException(name); |
84 | } |
85 | } |
86 | |
87 | public final void endElement(final String name) throws XmlSyntaxException { |
88 | if (getStartTag().equals(name)) { |
89 | // nothing to do |
90 | } else if ("LATEXPATTERN".equals(name)) { |
91 | definition.setLatexPattern(latexPattern); |
92 | } else if (formulaHandler.getStartTag().equals(name)) { |
93 | definition.setFormula(formulaHandler.getFormula()); |
94 | } else if (descriptionHandler.getStartTag().equals(name)) { |
95 | definition.setDescription(descriptionHandler.getLatexList()); |
96 | } else { |
97 | throw XmlSyntaxException.createUnexpectedTagException(name); |
98 | } |
99 | } |
100 | |
101 | public final void characters(final String name, final String data) { |
102 | if ("LATEXPATTERN".equals(name)) { |
103 | latexPattern = data; |
104 | } else { |
105 | throw new RuntimeException("Unexpected character data in tag: " + name); |
106 | } |
107 | } |
108 | |
109 | |
110 | } |