ColumnExpression


1   /* =============================================================
2    * SmallSQL : a free Java DBMS library for the Java(tm) platform
3    * =============================================================
4    *
5    * (C) Copyright 2004-2006, by Volker Berlin.
6    *
7    * Project Info:  http://www.smallsql.de/
8    *
9    * This library is free software; you can redistribute it and/or modify it 
10   * under the terms of the GNU Lesser General Public License as published by 
11   * the Free Software Foundation; either version 2.1 of the License, or 
12   * (at your option) any later version.
13   *
14   * This library is distributed in the hope that it will be useful, but 
15   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
16   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
17   * License for more details.
18   *
19   * You should have received a copy of the GNU Lesser General Public
20   * License along with this library; if not, write to the Free Software
21   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
22   * USA.  
23   *
24   * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
25   * in the United States and other countries.]
26   *
27   * ---------------
28   * ColumnExpression.java
29   * ---------------
30   * Author: Volker Berlin
31   * 
32   * Created on 13.06.2004
33   */
34  package smallsql.database;
35  
36  
37  /**
38   * A Column how it is used for Views. It based on a Expression and not on a native Column from a Table.
39   * This Column is read only.
40   * 
41   * @author Volker Berlin
42   */
43  class ColumnExpression extends Column {
44  
45      final private Expression expr;
46      
47      ColumnExpression(Expression expr){
48          this.expr = expr;
49      }
50      
51      
52      String   getName(){
53          return expr.getAlias();
54      }
55  
56      
57      boolean isAutoIncrement(){
58          return expr.isAutoIncrement();
59      }
60  
61      
62      boolean isCaseSensitive(){
63          return expr.isCaseSensitive();
64      }
65  
66  
67      boolean isNullable(){
68          return expr.isNullable();
69      }
70  
71  
72      int getDataType(){
73          return expr.getDataType();
74      }
75  
76  
77      int getDisplaySize(){
78          return expr.getDisplaySize();
79      }
80  
81  
82      int getScale(){
83          return expr.getScale();
84      }
85  
86  
87      int getPrecision(){
88          return expr.getPrecision();
89      }
90  
91  }
92
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags