01 /* This file is part of the project "Hilbert II" - http://www.qedeq.org
02 *
03 * Copyright 2000-2011, Michael Meyling <mime@qedeq.org>.
04 *
05 * "Hilbert II" is free software; you can redistribute
06 * it and/or modify it under the terms of the GNU General Public
07 * License as published by the Free Software Foundation; either
08 * version 2 of the License, or (at your option) any later version.
09 *
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.dto.module.TermVo;
19 import org.qedeq.kernel.xml.common.XmlSyntaxException;
20 import org.qedeq.kernel.xml.handler.common.AbstractSimpleHandler;
21 import org.qedeq.kernel.xml.handler.common.SimpleAttributes;
22 import org.qedeq.kernel.xml.handler.list.ElementHandler;
23
24
25 /**
26 * Parse term.
27 *
28 * @version $Revision: 1.1 $
29 * @author Michael Meyling
30 */
31 public class TermHandler extends AbstractSimpleHandler {
32
33 /** Value object for term. */
34 private TermVo term;
35
36 /** Handles {@link org.qedeq.kernel.se.base.list.Element}s. */
37 private final ElementHandler elementHandler;
38
39
40 /**
41 * Handles terms.
42 *
43 * @param handler Parent handler.
44 */
45 public TermHandler(final AbstractSimpleHandler handler) {
46 super(handler, "TERM");
47 elementHandler = new ElementHandler(this);
48 }
49
50 public final void init() {
51 term = null;
52 }
53
54 /**
55 * Get parsed result.
56 *
57 * @return Term.
58 */
59 public final TermVo getTerm() {
60 return term;
61 }
62
63 public final void startElement(final String name, final SimpleAttributes attributes)
64 throws XmlSyntaxException {
65 if (getStartTag().equals(name)) {
66 // nothing to do
67 } else if (getLevel() > 1) {
68 changeHandler(elementHandler, name, attributes);
69 } else {
70 throw XmlSyntaxException.createUnexpectedTagException(name);
71 }
72 }
73
74 public final void endElement(final String name) throws XmlSyntaxException {
75 if (getStartTag().equals(name)) {
76 term = new TermVo(elementHandler.getElement());
77 } else if (getLevel() <= 1) {
78 throw XmlSyntaxException.createUnexpectedTagException(name);
79 }
80 }
81 }
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