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1   /* This file is part of the project "Hilbert II" - http://www.qedeq.org" target="alexandria_uri">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.Conclusion;
19  import org.qedeq.kernel.se.dto.module.ConclusionVo;
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 conclusion.
27   *
28   * @author  Michael Meyling
29   */
30  public class ConclusionHandler extends AbstractSimpleHandler {
31  
32      /** Handler for axiom formula. */
33      private final FormulaHandler formulaHandler;
34  
35      /** Hypothesis value object. */
36      private ConclusionVo conclusion;
37  
38      /**
39       * Deals with axioms.
40       *
41       * @param   handler Parent handler.
42       */
43      public ConclusionHandler(final AbstractSimpleHandler handler) {
44          super(handler, "CONCLUSION");
45          formulaHandler = new FormulaHandler(this);
46      }
47  
48      public final void init() {
49          conclusion = null;
50      }
51  
52      /**
53       * Get conclusion.
54       *
55       * @return  Hypothesis.
56       */
57      public final Conclusion getConclusion() {
58          return conclusion;
59      }
60  
61      public final void startElement(final String name, final SimpleAttributes attributes)
62              throws XmlSyntaxException {
63          if (getStartTag().equals(name)) {
64              conclusion = new ConclusionVo();
65              conclusion.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              conclusion.setFormula(formulaHandler.getFormula());
78          } else {
79              throw XmlSyntaxException.createUnexpectedTagException(name);
80          }
81      }
82  
83  }