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.util.Enumeration;
49
50 /**
51 * A {@link TailoredQuery} which uses a <code>PreparedStatement</code>.
52 *
53 */
54 public class PreparedTailoredQuery extends TailoredQuery {
55 private PreparedStatementFactory statements;
56
57 /**
58 * Full constructor.
59 *
60 * @param modifier SQL modifier eg DISTINCT
61 * @param selectedColumns an array of columns we know we need
62 * @param otherTables tables other than the one we belong to
63 * @param whereClause raw SQL where clause
64 * @param orderByClause raw SQL order by clause
65 */
66 public PreparedTailoredQuery(String modifier,
67 Column<?>[] selectedColumns, Table<?>[] otherTables,
68 String whereClause, String orderByClause) {
69 super(modifier, selectedColumns, otherTables, whereClause, orderByClause);
70 statements = new PreparedStatementFactory(database, sql);
71 }
72
73 /**
74 * Constructor with null modifier.
75 *
76 * @param selectedColumns an array of columns we know we need
77 * @param otherTables tables other than the one we belong to
78 * @param whereClause raw SQL where clause
79 * @param orderByClause raw SQL order by clause
80 */
81 public PreparedTailoredQuery(Column<?>[] selectedColumns, Table<?>[] otherTables,
82 String whereClause, String orderByClause) {
83 this(null, selectedColumns, otherTables, whereClause, orderByClause);
84 }
85
86 /**
87 * The results of the query.
88 * @return the results (a TailoredResultSetEnumeration) as an Enumeration.
89 * @see org.melati.poem.TailoredQuery#selection()
90 */
91 public Enumeration<FieldSet> selection() {
92 return new TailoredResultSetEnumeration<FieldSet>(this, statements.resultSet());
93 }
94
95 /**
96 * @return an enumeration of the Columns in the first row of a ResultSet
97 * {@inheritDoc}
98 * @see org.melati.poem.TailoredQuery#selection_firstRaw()
99 */
100 public Enumeration<Object> selection_firstRaw() {
101 return new FirstRawTailoredResultSetEnumeration<Object>(this,
102 statements.resultSet());
103 }
104 }