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.ResultSet;
49 import java.sql.PreparedStatement;
50 import java.sql.Types;
51 import java.sql.SQLException;
52 import java.util.Enumeration;
53 import org.melati.poem.util.LongEnumeration;
54 import org.melati.poem.dbms.Dbms;
55
56 /**
57 * Normal longs: <code>INT8</code>.
58 */
59 public class LongPoemType extends AtomPoemType<Long> {
60
61 /** Instance of a nullable LongPoemType. */
62 public static final LongPoemType nullableInstance = new LongPoemType(true);
63
64 /**
65 * Constructor.
66 * @param nullable whether null is an allowed value
67 */
68 public LongPoemType(boolean nullable) {
69 super(Types.BIGINT, "INT8", nullable);
70 }
71
72 protected LongPoemType(int sqlTypeCode, String sqlTypeName,
73 boolean nullable) {
74 super(sqlTypeCode, sqlTypeName, nullable);
75 }
76
77 /**
78 * TODO Do down-counting??
79 */
80 protected Enumeration<Long> _possibleRaws() {
81 Long low = (Long)getLowRaw();
82 Long limit = (Long)getLimitRaw();
83 return low == null ?
84 null :
85 new LongEnumeration(low.longValue(),
86 limit == null ?
87 Long.MAX_VALUE : limit.longValue());
88 }
89
90 protected void _assertValidRaw(Object raw) {
91 if (raw != null && !(raw instanceof Long))
92 throw new TypeMismatchPoemException(raw, this);
93 }
94
95 protected Long _getRaw(ResultSet rs, int col) throws SQLException {
96 synchronized (rs) {
97 long i = rs.getLong(col);
98 return i == 0 && rs.wasNull() ? null : new Long(i); }
99 }
100
101 protected void _setRaw(PreparedStatement ps, int col, Object integer)
102 throws SQLException {
103 ps.setLong(col, ((Long)integer).longValue());
104 }
105
106 protected Long _rawOfString(String rawString)
107 throws ParsingPoemException {
108 try {
109 return new Long(rawString);
110 }
111 catch (NumberFormatException e) {
112 throw new ParsingPoemException(this, rawString, e);
113 }
114 }
115
116 protected String _sqlDefinition(Dbms dbms) {
117 return dbms.getLongSqlDefinition();
118 }
119
120
121 /**
122 * Longs can represent Integers.
123 *
124 * {@inheritDoc}
125 * @see org.melati.poem.BasePoemType#_canRepresent(org.melati.poem.SQLPoemType)
126 */
127 protected boolean _canRepresent(SQLPoemType<?> other) {
128 // Sql type code is not checked
129 if (other instanceof LongPoemType)
130 return true;
131 return other instanceof IntegerPoemType;
132 }
133
134 /**
135 * {@inheritDoc}
136 * @see org.melati.poem.PoemType#toDsdType()
137 */
138 public String toDsdType() {
139 return "Long";
140 }
141
142 protected void _saveColumnInfo(ColumnInfo columnInfo)
143 throws AccessPoemException {
144 columnInfo.setTypefactory(PoemTypeFactory.LONG);
145 }
146
147 }