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.ModusPonensVo;
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
23
24 /**
25 * Parse a Modus Ponens usage.
26 *
27 * @author Michael Meyling
28 */
29 public class ModusPonensHandler extends AbstractSimpleHandler {
30
31 /** Rule value object. */
32 private ModusPonensVo modusPonens;
33
34 /**
35 * Deals with definitions.
36 *
37 * @param handler Parent handler.
38 */
39 public ModusPonensHandler(final AbstractSimpleHandler handler) {
40 super(handler, "MP");
41 }
42
43 public final void init() {
44 modusPonens = null;
45 }
46
47 /**
48 * Get Modus Ponens usage.
49 *
50 * @return Modus Ponens usage.
51 */
52 public final ModusPonensVo getModusPonensVo() {
53 return modusPonens;
54 }
55
56 public final void startElement(final String name, final SimpleAttributes attributes)
57 throws XmlSyntaxException {
58 if (getStartTag().equals(name)) {
59 modusPonens = new ModusPonensVo(attributes.getString("ref1"),
60 attributes.getString("ref2"));
61 } else {
62 throw XmlSyntaxException.createUnexpectedTagException(name);
63 }
64 }
65
66 public final void endElement(final String name) throws XmlSyntaxException {
67 if (getStartTag().equals(name)) {
68 // nothing to do
69 } else {
70 throw XmlSyntaxException.createUnexpectedTagException(name);
71 }
72 }
73
74 }
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