1 /*
2 Copyright (c) 2008 Health Market Science, Inc.
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License.
8
9 This library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with this library; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17 USA
18
19 You can contact Health Market Science at info@healthmarketscience.com
20 or at the following address:
21
22 Health Market Science
23 2700 Horizon Drive
24 Suite 200
25 King of Prussia, PA 19406
26 */
27
28 package com.healthmarketscience.sqlbuilder;
29
30 import java.io.IOException;
31 import com.healthmarketscience.common.util.AppendableExt;
32 import com.healthmarketscience.sqlbuilder.dbspec.Table;
33
34
35
36 /**
37 * Outputs a clause for SELECTing all columns from a table
38 * <code>"<alias>.*"</code>
39 *
40 * @author James Ahlborn
41 */
42 class AllTableColumns extends TableObject
43 {
44 AllTableColumns(Table table) {
45 super(table);
46 }
47
48 @Override
49 protected void collectSchemaObjects(ValidationContext vContext)
50 {
51 super.collectSchemaObjects(vContext);
52
53 // using this construct means we are essentially referencing *all* columns
54 // in this table, so update the columns list accordingly
55 vContext.getColumns().addAll(_table.getColumns());
56 }
57
58 @Override
59 public void appendTo(AppendableExt app) throws IOException {
60 ColumnObject.appendTableAliasPrefix(app, _table);
61 app.append("*");
62 }
63 }