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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.dto.module.UsedByListVo;
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 list of referencing modules.
26   *
27   * @version $Revision: 1.1 $
28   * @author  Michael Meyling
29   */
30  public class UsedByListHandler extends AbstractSimpleHandler {
31  
32      /** Value object for the "this module is used by" list. */
33      private UsedByListVo list;
34  
35      /** Handler for a single module specification. */
36      private final SpecificationHandler specificationHandler;
37  
38  
39      /**
40       * Handles list of modules that use the current one.
41       *
42       * @param   handler Parent handler.
43       */
44      public UsedByListHandler(final AbstractSimpleHandler handler) {
45          super(handler, "USEDBY");
46          specificationHandler = new SpecificationHandler(this);
47      }
48  
49      public final void init() {
50          list = new UsedByListVo();
51      }
52  
53      /**
54       * Get parsed result.
55       *
56       * @return  Location list.
57       */
58      public final UsedByListVo getUsedByList() {
59          return list;
60      }
61  
62      public final void startElement(final String name, final SimpleAttributes attributes)
63              throws XmlSyntaxException {
64          if (getStartTag().equals(name)) {
65              // ignore
66          } else if (specificationHandler.getStartTag().equals(name)) {
67              changeHandler(specificationHandler, 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              // ignore
76          } else if (specificationHandler.getStartTag().equals(name)) {
77              list.add(specificationHandler.getSpecification());
78          } else {
79              throw XmlSyntaxException.createUnexpectedTagException(name);
80          }
81      }
82  
83  }