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.list; |
17 | |
18 | import java.util.ArrayList; |
19 | import java.util.List; |
20 | |
21 | import org.qedeq.kernel.xml.common.XmlSyntaxException; |
22 | import org.qedeq.kernel.xml.handler.common.AbstractSimpleHandler; |
23 | import org.qedeq.kernel.xml.handler.common.SaxDefaultHandler; |
24 | import org.qedeq.kernel.xml.handler.common.SimpleAttributes; |
25 | |
26 | /** |
27 | * Parse unknown number of elements. |
28 | * |
29 | * @author Michael Meyling |
30 | */ |
31 | public class BasicHandler extends AbstractSimpleHandler { |
32 | |
33 | /** Our parsed elements. */ |
34 | private List elements; |
35 | |
36 | /** Handles {@link org.qedeq.kernel.se.base.list.Element}s. */ |
37 | private final ElementHandler elementHandler; |
38 | |
39 | |
40 | /** |
41 | * Deals with elements. |
42 | * |
43 | * @param handler Parent handler. |
44 | */ |
45 | public BasicHandler(final SaxDefaultHandler handler) { |
46 | super(handler, "basic"); |
47 | elements = new ArrayList(); |
48 | elementHandler = new ElementHandler(this); |
49 | } |
50 | |
51 | /** |
52 | * Handles formulas. |
53 | * |
54 | * @param handler Parent handler. |
55 | */ |
56 | public BasicHandler(final AbstractSimpleHandler handler) { |
57 | super(handler, "basic"); |
58 | elements = new ArrayList(); |
59 | elementHandler = new ElementHandler(this); |
60 | } |
61 | |
62 | public final void init() { |
63 | elements.clear(); |
64 | } |
65 | |
66 | /** |
67 | * Get parsed result. |
68 | * |
69 | * @return List of elements. |
70 | */ |
71 | public final List getElements() { |
72 | return elements; |
73 | } |
74 | |
75 | public final void startElement(final String name, final SimpleAttributes attributes) |
76 | throws XmlSyntaxException { |
77 | if (getStartTag().equals(name)) { |
78 | // nothing to do |
79 | } else if (getLevel() > 1) { |
80 | changeHandler(elementHandler, name, attributes); |
81 | } else { |
82 | throw XmlSyntaxException.createUnexpectedTagException(name); |
83 | } |
84 | } |
85 | |
86 | public final void endElement(final String name) throws XmlSyntaxException { |
87 | if (getStartTag().equals(name)) { |
88 | // nothing to do, we are ready! |
89 | } else if (getLevel() <= 1) { |
90 | throw XmlSyntaxException.createUnexpectedTagException(name); |
91 | } else { |
92 | elements.add(elementHandler.getElement()); |
93 | } |
94 | } |
95 | } |