1 /*
2 * $Source: /usr/cvsroot/melati/maven-dsd-plugin/src/main/java/org/melati/poem/prepro/TableQualifier.java,v $
3 * $Revision: 1.14 $
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 * Abstract class from which all <tt>TableQualifier</TT>s are derived.
53 *
54 */
55 public abstract class TableQualifier {
56
57 /**
58 * Update the model.
59 *
60 * @param table the {@link TableDef} to update
61 * @throws IllegalityException if there is a semantic error
62 */
63 public abstract void apply(TableDef table) throws IllegalityException;
64
65 /**
66 * Creates the appropriate type of <code>TableQualifier</code>
67 * from the input stream.
68 *
69 * @param tokens the <code>StreamTokenizer</code> to get tokens from
70 *
71 * @throws ParsingDSDException if an unexpected token is encountered
72 * @throws IOException if something goes wrong with the file system
73 * @return the required sub type
74 */
75 public static TableQualifier from(StreamTokenizer tokens)
76 throws ParsingDSDException, IOException {
77 if (tokens.ttype != StreamTokenizer.TT_WORD)
78 throw new ParsingDSDException("<table qualifier>", tokens);
79 TableQualifier it;
80 String kind = tokens.sval;
81 tokens.nextToken();
82 if (kind.equals("displayname"))
83 it = new DisplayNameTableQualifier(tokens);
84 else if (kind.equals("description"))
85 it = new DescriptionTableQualifier(tokens);
86 else if (kind.equals("cachelimit"))
87 it = new CacheSizeTableQualifier(tokens);
88 else if (kind.equals("seqcached"))
89 it = new SeqCachedTableQualifier();
90 else if (kind.equals("category"))
91 it = new CategoryTableQualifier(tokens);
92 else if (kind.equals("displayorder"))
93 it = new DisplayOrderTableQualifier(tokens);
94 else
95 throw new ParsingDSDException("<table qualifier>", kind, tokens);
96 return it;
97 }
98 }