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.InitialPredicateDefinition; |
19 | import org.qedeq.kernel.se.dto.module.InitialPredicateDefinitionVo; |
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 | import org.qedeq.kernel.xml.handler.list.ElementHandler; |
24 | |
25 | |
26 | /** |
27 | * Parse an initial predicate definition. |
28 | * |
29 | * @author Michael Meyling |
30 | */ |
31 | public class InitialPredicateDefinitionHandler extends AbstractSimpleHandler { |
32 | |
33 | /** Handler for an element. */ |
34 | private final ElementHandler elementHandler; |
35 | |
36 | /** Handler for predicate description. */ |
37 | private final LatexListHandler descriptionHandler; |
38 | |
39 | /** Definition value object. */ |
40 | private InitialPredicateDefinitionVo definition; |
41 | |
42 | /** LaTeX pattern for the definition. */ |
43 | private String latexPattern; |
44 | |
45 | |
46 | /** |
47 | * Deals with definitions. |
48 | * |
49 | * @param handler Parent handler. |
50 | */ |
51 | public InitialPredicateDefinitionHandler(final AbstractSimpleHandler handler) { |
52 | super(handler, "DEFINITION_PREDICATE_INITIAL"); |
53 | elementHandler = new ElementHandler(this); |
54 | descriptionHandler = new LatexListHandler(this, "DESCRIPTION"); |
55 | } |
56 | |
57 | public final void init() { |
58 | definition = null; |
59 | latexPattern = null; |
60 | } |
61 | |
62 | /** |
63 | * Get definition. |
64 | * |
65 | * @return Definition. |
66 | */ |
67 | public final InitialPredicateDefinition getInitialDefinition() { |
68 | return definition; |
69 | } |
70 | |
71 | public final void startElement(final String name, final SimpleAttributes attributes) |
72 | throws XmlSyntaxException { |
73 | if (getStartTag().equals(name)) { |
74 | definition = new InitialPredicateDefinitionVo(); |
75 | definition.setArgumentNumber(attributes.getString("arguments")); |
76 | definition.setName(attributes.getString("name")); |
77 | } else if ("LATEXPATTERN".equals(name)) { |
78 | // nothing to do yet |
79 | } else if ("PREDCON".equals(name)) { |
80 | changeHandler(elementHandler, name, attributes); |
81 | } else if (descriptionHandler.getStartTag().equals(name)) { |
82 | changeHandler(descriptionHandler, name, attributes); |
83 | } else { |
84 | throw XmlSyntaxException.createUnexpectedTagException(name); |
85 | } |
86 | } |
87 | |
88 | public final void endElement(final String name) throws XmlSyntaxException { |
89 | if (getStartTag().equals(name)) { |
90 | // nothing to do |
91 | } else if ("LATEXPATTERN".equals(name)) { |
92 | definition.setLatexPattern(latexPattern); |
93 | } else if ("PREDCON".equals(name)) { |
94 | definition.setPredCon(elementHandler.getElement()); |
95 | } else if (descriptionHandler.getStartTag().equals(name)) { |
96 | definition.setDescription(descriptionHandler.getLatexList()); |
97 | } else { |
98 | throw XmlSyntaxException.createUnexpectedTagException(name); |
99 | } |
100 | } |
101 | |
102 | public final void characters(final String name, final String data) { |
103 | if ("LATEXPATTERN".equals(name)) { |
104 | latexPattern = data; |
105 | } else { |
106 | throw new RuntimeException("Unexpected character data in tag: " + name); |
107 | } |
108 | } |
109 | |
110 | |
111 | } |