SelectRowReader


1   package com.daffodilwoods.daffodildb.server.sql99.dql.resultsetmetadata;
2   
3   import com.daffodilwoods.daffodildb.server.datadictionarysystem.*;
4   import com.daffodilwoods.daffodildb.server.sql99.dql.listenerevents.*;
5   import com.daffodilwoods.daffodildb.utils.field.*;
6   import com.daffodilwoods.database.resource.*;
7   
8   /**
9    *
10   * <p>Title: SelectRowReader</p>
11   * <p>Description:
12   * This class represents a RowReader which is initiated when resultSet is of
13   * type NONSCROLLABLE.
14   * This clas provides the functionality of reading and writing a row returned
15   * from resultset.
16   * </p>
17   * <p>Copyright: Copyright (c) 2003</p>
18   * <p>Company: Daffodil S/W Ltd.</p>
19   * @author SelectTeam
20   * @version 1.0
21   */
22  
23  public class SelectRowReader implements _RowReader {
24  
25     /**
26      * Represents the characteristics of select query.
27      */
28  
29     _ColumnCharacteristics columnCharacteristics;
30  
31     /**
32      * Represents the chained columns present in select query.
33      */
34  
35     ForeignKeyColumns[] columns;
36  
37     public SelectRowReader(_ColumnCharacteristics columnCharacteristics, ForeignKeyColumns[] columns0) {
38        this.columnCharacteristics = columnCharacteristics;
39        columns = columns0;
40     }
41  
42     /**
43      * For documentation of following methods, refer the documentation of
44      * _RowReader
45      */
46  
47     public Object   getObject(int index, Object   row) throws DException {
48        return ( (FieldBase) ( (Object  []) row)[index - 1]).getObject();
49     }
50  
51     public void setObject(int columnIndex, Object   value, Object   row) throws DException {
52        Object   tobeUpdated = ( (Object  []) row)[columnIndex - 1];
53        if (value instanceof FieldBase) {
54           tobeUpdated = value;
55        } else {
56           ( (FieldBase) tobeUpdated).setObject(value);
57        }
58     }
59  }
60

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