1 /*
2 * db2sa: DB2 Syntax Assistant
3 * Copyright (C) Andres Gomez Casanova
4 *
5 * This file is part of db2sa.
6 *
7 * db2sa is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * db2sa is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, see <http://www.gnu.org/licenses/>.
19 *
20 * Contact:
21 * a n g o c a at y a h o o dot c o m
22 * Cra. 45 No 61 - 31, Bogota, Colombia.
23 *
24 * Author: $LastChangedBy: angoca $:
25 * Date: $LastChangedDate: 2009-07-08 19:56:43 +0200 (Wed, 08 Jul 2009) $:
26 * Revision: $LastChangedRevision: 357 $:
27 * URL: $HeadURL: https://db2sa.svn.sourceforge.net/svnroot/db2sa/branches/db2sa_beta/source-code/src/main/java/name/angoca/db2sa/readers/GrammarReader.java $:
28 */
29 package name.angoca.db2sa.readers;
30
31 import name.angoca.db2sa.Configurator;
32 import name.angoca.db2sa.Constants;
33 import name.angoca.db2sa.messages.Messages;
34
35 import org.xml.sax.InputSource;
36
37 /**
38 * This is the grammar reader.<br/>
39 * <b>Control Version</b><br />
40 * <ul>
41 * <li>0.0.1 Class creation.</li>
42 * <li>0.1.0 First Implementation of the XML reader.</li>
43 * <li>0.2.0 Use of ConfigurationReader.</li>
44 * <li>0.2.1 Throw exception before.</li>
45 * <li>0.2.2 final.</li>
46 * <li>1.0.0 Moved to version 1.</li>
47 * </ul>
48 *
49 * @author Andres Gomez Casanova <a
50 * href="mailto:a n g o c a at y a h o o dot c o m">(AngocA)</a>
51 * @version 1.0.0 2009-07-19
52 */
53 public final class GrammarReader {
54
55 /**
56 * Hide the default constructor.
57 */
58 private GrammarReader() {
59 // Nothing to do. No tests.
60 }
61
62 /**
63 * Reads the grammar file and creates the structure of the graph.
64 *
65 * @return The content of the file.
66 */
67 public static InputSource /* ! */read() {
68 InputSource content = null;
69
70 final String fileName = Configurator.getInstance().getProperty(
71 Constants.GRAMMAR_FILE_NAME);
72 if (fileName == null) {
73 // TODO revisar que cuando se lance esta excepcion termine la
74 // ejecucion del programa
75 // TODO Lanzar una exception propia, no genérica.
76 throw new RuntimeException(Messages
77 .getString("GrammarReader" //$NON-NLS-1$
78 + ".ERROR_GETTING_PROPERTY") //$NON-NLS-1$
79 + Constants.GRAMMAR_FILE_NAME);
80 }
81 content = new InputSource(fileName);
82 return content;
83 }
84 }