1   /*
2    *  Copyright (c) 1998-2001, The University of Sheffield.
3    *
4    *  This file is part of GATE (see http://gate.ac.uk/), and is free
5    *  software, licenced under the GNU Library General Public License,
6    *  Version 2, June 1991 (in the distribution as file licence.html,
7    *  and also available at http://gate.ac.uk/gate/licence.html).
8    *
9    *  Valentin Tablan 29/10/2001
10   *
11   *  $Id: LanguageAnalyserPersistence.java,v 1.2 2001/10/29 17:11:26 valyt Exp $
12   *
13   */
14  package gate.util.persistence;
15  
16  import gate.*;
17  import gate.creole.*;
18  import gate.util.*;
19  import gate.persist.PersistenceException;
20  
21  import java.util.*;
22  /**
23   * Provides a persistent equivalent for {@link LanguageAnalyser}s.
24   * Adds handling of corpus and document members for PRPersistence.
25   */
26  public class LanguageAnalyserPersistence extends PRPersistence {
27    /**
28     * Populates this Persistence with the data that needs to be stored from the
29     * original source object.
30     */
31    public void extractDataFromSource(Object source)throws PersistenceException{
32      if(! (source instanceof LanguageAnalyser)){
33        throw new UnsupportedOperationException(
34                  getClass().getName() + " can only be used for " +
35                  LanguageAnalyser.class.getName() +
36                  " objects!\n" + source.getClass().getName() +
37                  " is not a " + LanguageAnalyser.class.getName());
38      }
39  
40      super.extractDataFromSource(source);
41  
42      LanguageAnalyser la = (LanguageAnalyser)source;
43      document = PersistenceManager.getPersistentRepresentation(la.getDocument());
44      corpus = PersistenceManager.getPersistentRepresentation(la.getCorpus());
45    }
46  
47    /**
48     * Creates a new object from the data contained. This new object is supposed
49     * to be a copy for the original object used as source for data extraction.
50     */
51    public Object createObject()throws PersistenceException,
52                                       ResourceInstantiationException{
53      LanguageAnalyser la = (LanguageAnalyser)super.createObject();
54      la.setCorpus((Corpus)PersistenceManager.getTransientRepresentation(corpus));
55      la.setDocument((Document)PersistenceManager.
56                               getTransientRepresentation(document));
57      return la;
58    }
59  
60  
61    protected Object corpus;
62    protected Object document;
63    static final long serialVersionUID = -4632241679877556163L;
64  }