View Javadoc

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.dto.module.PropositionVo;
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 proposition.
26   *
27   * @version $Revision: 1.1 $
28   * @author  Michael Meyling
29   */
30  public class PropositionHandler extends AbstractSimpleHandler {
31  
32      /** Handler for proposition formula. */
33      private final FormulaHandler formulaHandler;
34  
35      /** Handler for rule description. */
36      private final LatexListHandler descriptionHandler;
37  
38      /** Handle informal proofs. */
39      private final ProofHandler proofHandler;
40  
41      /** Handle formal proofs. */
42      private final FormalProofHandler formalProofHandler;
43  
44      /** Proposition value object. */
45      private PropositionVo proposition;
46  
47  
48      /**
49       * Deals with propositions.
50       *
51       * @param   handler Parent handler.
52       */
53      public PropositionHandler(final AbstractSimpleHandler handler) {
54          super(handler, "THEOREM");
55          formulaHandler = new FormulaHandler(this);
56          descriptionHandler = new LatexListHandler(this, "DESCRIPTION");
57          proofHandler = new ProofHandler(this);
58          formalProofHandler = new FormalProofHandler(this);
59      }
60  
61      public final void init() {
62          proposition = null;
63      }
64  
65      /**
66       * Get proposition.
67       *
68       * @return  Proposition.
69       */
70      public final PropositionVo getProposition() {
71          return proposition;
72      }
73  
74      public final void startElement(final String name, final SimpleAttributes attributes)
75              throws XmlSyntaxException {
76          if (getStartTag().equals(name)) {
77              proposition = new PropositionVo();
78          } else if (formulaHandler.getStartTag().equals(name)) {
79              changeHandler(formulaHandler, name, attributes);
80          } else if (descriptionHandler.getStartTag().equals(name)) {
81              changeHandler(descriptionHandler, name, attributes);
82          } else if (proofHandler.getStartTag().equals(name)) {
83              changeHandler(proofHandler, name, attributes);
84          } else if (formalProofHandler.getStartTag().equals(name)) {
85              changeHandler(formalProofHandler, name, attributes);
86          } else {
87              throw XmlSyntaxException.createUnexpectedTagException(name);
88          }
89      }
90  
91      public final void endElement(final String name) throws XmlSyntaxException {
92          if (getStartTag().equals(name)) {
93              // nothing to do
94          } else if (formulaHandler.getStartTag().equals(name)) {
95              proposition.setFormula(formulaHandler.getFormula());
96          } else if (descriptionHandler.getStartTag().equals(name)) {
97              proposition.setDescription(descriptionHandler.getLatexList());
98          } else if (proofHandler.getStartTag().equals(name)) {
99              proposition.addProof(proofHandler.getProof());
100         } else if (formalProofHandler.getStartTag().equals(name)) {
101             proposition.addFormalProof(formalProofHandler.getProof());
102         } else {
103             throw XmlSyntaxException.createUnexpectedTagException(name);
104         }
105     }
106 
107 }