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1   /*
2    * $Source$
3    * $Revision$
4    *
5    * Copyright (C) 2000 William Chesters
6    *
7    * Part of Melati (http://melati.org), a framework for the rapid
8    * development of clean, maintainable web applications.
9    *
10   * Melati is free software; Permission is granted to copy, distribute
11   * and/or modify this software under the terms either:
12   *
13   * a) the GNU General Public License as published by the Free Software
14   *    Foundation; either version 2 of the License, or (at your option)
15   *    any later version,
16   *
17   *    or
18   *
19   * b) any version of the Melati Software License, as published
20   *    at http://melati.org
21   *
22   * You should have received a copy of the GNU General Public License and
23   * the Melati Software License along with this program;
24   * if not, write to the Free Software Foundation, Inc.,
25   * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the
26   * GNU General Public License and visit http://melati.org to obtain the
27   * Melati Software License.
28   *
29   * Feel free to contact the Developers of Melati (http://melati.org),
30   * if you would like to work out a different arrangement than the options
31   * outlined here.  It is our intention to allow Melati to be used by as
32   * wide an audience as possible.
33   *
34   * This program is distributed in the hope that it will be useful,
35   * but WITHOUT ANY WARRANTY; without even the implied warranty of
36   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
37   * GNU General Public License for more details.
38   *
39   * Contact details for copyright holder:
40   *
41   *     William Chesters <williamc@paneris.org>
42   *     http://paneris.org/~williamc
43   *     Obrechtstraat 114, 2517VX Den Haag, The Netherlands
44   */
45  
46  package org.melati.poem.prepro;
47  
48  /**
49   * A <tt>FieldQualifier</tt> which defines whether 
50   * a <tt>Field</tt> is a <tt>TroidField</tt>.
51   *
52   * A Table Row Object Id field is expected in every <tt>Table</tt>.
53   *
54   * See org.melati.poem.TroidPoemType
55   */
56  
57  public class TroidFieldQualifier extends FieldQualifier {
58  
59   /**
60    * Constructor.
61    */
62    public TroidFieldQualifier() {
63    }
64  
65   /**
66    * Update the model.
67    *
68    * @param field the {@link FieldDef} to update
69    *
70    * @throws IllegalityException if there is a semantic contractiction
71    */
72    public void apply(FieldDef field) throws IllegalityException {
73      if (!field.typeShortName.equals("Integer") || field.isNullable())
74        throw new TroidTypeException(field);
75      field.setTroidColumn(true);
76    }
77  }