1 /*
2 * $Source: /usr/cvsroot/melati/poem/src/main/java/org/melati/poem/IntegerPoemType.java,v $
3 * $Revision: 1.29 $
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.PreparedStatement;
50 import java.sql.ResultSet;
51 import java.sql.SQLException;
52 import java.util.Enumeration;
53 import org.melati.poem.util.IntegerEnumeration;
54
55 /**
56 * Plain old integers, the range being contingent on the underlying SQL type.
57 */
58 public class IntegerPoemType extends AtomPoemType {
59
60 /** Instance of a nullable IntegerPoemType. */
61 public static final IntegerPoemType nullableInstance = new IntegerPoemType(true);
62
63 /**
64 * Constructor.
65 * @param nullable whether nullable or not
66 */
67 public IntegerPoemType(boolean nullable) {
68 super(Types.INTEGER, "INT", nullable);
69 }
70
71 protected IntegerPoemType(int sqlTypeCode, String sqlTypeName,
72 boolean nullable) {
73 super(sqlTypeCode, sqlTypeName, nullable);
74 }
75
76 /**
77 * @todo Do down-counting?
78 */
79 protected Enumeration _possibleRaws() {
80 Integer low = (Integer)getLowRaw();
81 Integer limit = (Integer)getLimitRaw();
82 return low == null ?
83 null :
84 new IntegerEnumeration(low.intValue(),
85 limit == null ?
86 Integer.MAX_VALUE : limit.intValue());
87 }
88
89 protected void _assertValidRaw(Object raw) {
90 if (raw != null && !(raw instanceof Integer))
91 throw new TypeMismatchPoemException(raw, this);
92 }
93
94 protected Object _getRaw(ResultSet rs, int col) throws SQLException {
95 synchronized (rs) {
96 int i = rs.getInt(col);
97 return i == 0 && rs.wasNull() ? null : new Integer(i); }
98 }
99
100 protected void _setRaw(PreparedStatement ps, int col, Object integer)
101 throws SQLException {
102 ps.setInt(col, ((Integer)integer).intValue());
103 }
104
105 protected Object _rawOfString(String rawString)
106 throws ParsingPoemException {
107 try {
108 return new Integer(rawString);
109 }
110 catch (NumberFormatException e) {
111 throw new ParsingPoemException(this, rawString, e);
112 }
113 }
114
115 /**
116 * {@inheritDoc}
117 * @see org.melati.poem.BasePoemType#_canRepresent(org.melati.poem.SQLPoemType)
118 */
119 protected boolean _canRepresent(SQLPoemType other) {
120 return other instanceof IntegerPoemType;
121 }
122
123 /**
124 * {@inheritDoc}
125 * @see org.melati.poem.PoemType#toDsdType()
126 */
127 public String toDsdType() {
128 return "Integer";
129 }
130
131 protected void _saveColumnInfo(ColumnInfo columnInfo)
132 throws AccessPoemException {
133 columnInfo.setTypefactory(PoemTypeFactory.INTEGER);
134 }
135
136 }