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 At paneris.org>
42 * http://paneris.org/~williamc
43 * Obrechtstraat 114, 2517VX Den Haag, The Netherlands
44 */
45
46 package org.melati.poem;
47
48 import java.sql.Types;
49 import java.sql.ResultSet;
50 import java.sql.PreparedStatement;
51 import java.sql.SQLException;
52 import java.util.Enumeration;
53
54
55 /**
56 * A <tt>Boolean</tt> <tt>Nullable</tt> {@link Field} type.
57 */
58 public class BooleanPoemType extends AtomPoemType<Boolean> {
59
60 /**
61 * Constructor.
62 * @param nullable whether nullable
63 */
64 public BooleanPoemType(boolean nullable) {
65 super(Types.BIT, "BOOLEAN", nullable);
66 }
67
68 protected Enumeration<Boolean> _possibleRaws() {
69 return new BooleanPossibleRawEnumeration();
70 }
71
72 protected void _assertValidRaw(Object raw) {
73 if (raw != null && !(raw instanceof Boolean))
74 throw new TypeMismatchPoemException(raw, this);
75 }
76
77 protected Boolean _getRaw(ResultSet rs, int col) throws SQLException {
78 synchronized (rs) {
79 boolean b = rs.getBoolean(col);
80 return rs.wasNull() ? null : b ? Boolean.TRUE : Boolean.FALSE; }
81 }
82
83 protected void _setRaw(PreparedStatement ps, int col, Object bool)
84 throws SQLException {
85 ps.setBoolean(col, ((Boolean)bool).booleanValue());
86 }
87
88 protected Boolean _rawOfString(String rawString)
89 throws ParsingPoemException {
90 rawString = rawString.trim();
91 if (rawString.length() == 1)
92 switch (rawString.charAt(0)) {
93 case 't': case 'T': case 'y': case 'Y': case '1':
94 return Boolean.TRUE;
95 case 'f': case 'F': case 'n': case 'N': case '0':
96 return Boolean.FALSE;
97 default:
98 throw new ParsingPoemException(this, rawString);
99 }
100
101 if (rawString.regionMatches(0, "true", 0, 4) ||
102 rawString.regionMatches(0, "yes", 0, 3))
103 return Boolean.TRUE;
104 else if (rawString.regionMatches(0, "false", 0, 5) ||
105 rawString.regionMatches(0, "no", 0, 2))
106 return Boolean.FALSE;
107 else
108 throw new ParsingPoemException(this, rawString);
109 }
110
111 protected boolean _canRepresent(SQLPoemType<?> other) {
112 return // sqlTypeCode() == other.sqlTypeCode() && // many things can represent boolean
113 other instanceof BooleanPoemType;
114 }
115
116 /**
117 * {@inheritDoc}
118 * @see org.melati.poem.PoemType#toDsdType()
119 */
120 public String toDsdType() {
121 return "Boolean";
122 }
123
124 protected void _saveColumnInfo(ColumnInfo columnInfo)
125 throws AccessPoemException {
126 columnInfo.setTypefactory(PoemTypeFactory.BOOLEAN);
127 }
128
129 }
130