01 /* This file is part of the project "Hilbert II" - http://www.qedeq.org
02 *
03 * Copyright 2000-2013, 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.base.module.Hypothesis;
19 import org.qedeq.kernel.se.dto.module.HypothesisVo;
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 hypothesis.
27 *
28 * @author Michael Meyling
29 */
30 public class HypothesisHandler extends AbstractSimpleHandler {
31
32 /** Handler for axiom formula. */
33 private final FormulaHandler formulaHandler;
34
35 /** Hypothesis value object. */
36 private HypothesisVo hypothesis;
37
38 /**
39 * Deals with axioms.
40 *
41 * @param handler Parent handler.
42 */
43 public HypothesisHandler(final AbstractSimpleHandler handler) {
44 super(handler, "HYPOTHESIS");
45 formulaHandler = new FormulaHandler(this);
46 }
47
48 public final void init() {
49 hypothesis = null;
50 }
51
52 /**
53 * Get hypothesis.
54 *
55 * @return Hypothesis.
56 */
57 public final Hypothesis getHypothesis() {
58 return hypothesis;
59 }
60
61 public final void startElement(final String name, final SimpleAttributes attributes)
62 throws XmlSyntaxException {
63 if (getStartTag().equals(name)) {
64 hypothesis = new HypothesisVo();
65 hypothesis.setLabel(attributes.getString("label"));
66 } else if (formulaHandler.getStartTag().equals(name)) {
67 changeHandler(formulaHandler, name, attributes);
68 } else {
69 throw XmlSyntaxException.createUnexpectedTagException(name);
70 }
71 }
72
73 public final void endElement(final String name) throws XmlSyntaxException {
74 if (getStartTag().equals(name)) {
75 // nothing to do
76 } else if (formulaHandler.getStartTag().equals(name)) {
77 hypothesis.setFormula(formulaHandler.getFormula());
78 } else {
79 throw XmlSyntaxException.createUnexpectedTagException(name);
80 }
81 }
82
83 }
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