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1   /*
2    * $Source: /usr/cvsroot/melati/maven-dsd-plugin/src/main/java/org/melati/poem/prepro/HeightFieldQualifier.java,v $
3    * $Revision: 1.10 $
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  import java.io.StreamTokenizer;
49  import java.io.IOException;
50  
51  /**
52   * A <tt>FieldQualifier</tt> which defines the <tt>Height</tt> 
53   * of a <tt>Field</tt>.
54   * 
55   * Only makes sense when applied to a text field.
56   */
57  public class HeightFieldQualifier extends FieldQualifier {
58  
59    private int height;
60  
61   /**
62    * Constructor.
63    *
64    * @param tokens the <code>StreamTokenizer</code> to get tokens from
65    *
66    * @throws ParsingDSDException if an unexpected token is encountered
67    * @throws IOException if something goes wrong with the file system
68    */
69    public HeightFieldQualifier(StreamTokenizer tokens)
70        throws ParsingDSDException, IOException {
71      DSD.expect(tokens, '=');
72      if (tokens.nextToken() != StreamTokenizer.TT_NUMBER ||
73          (int)tokens.nval <= 0)
74        throw new ParsingDSDException("<positive height number>", tokens);
75      height = (int)tokens.nval;
76      tokens.nextToken();
77    }
78  
79   /**
80    * Update the model.
81    *
82    * @param field the {@link FieldDef} to update
83    */
84    public void apply(FieldDef field) {
85      field.setHeight(height);
86    }
87  }