_RowReaderScrollable


1   package com.daffodilwoods.daffodildb.server.sql99.dql.listenerevents;
2   
3   import com.daffodilwoods.daffodildb.server.sql99.dql.queryexpression.*;
4   import com.daffodilwoods.daffodildb.server.sql99.dql.resultsetmetadata._RowReader;
5   
6   import java.util.Comparator  ;
7   import com.daffodilwoods.database.resource.DException;
8   import java.io.Serializable  ;
9   
10  /**
11   * It is used to read the row returned by the Select query. This is required
12   * when resultset is of SCROLLABLE type.
13   * <p>Title: </p>
14   * <p>Description: </p>
15   * <p>Copyright: Copyright (c) 2003</p>
16   * <p>Company: </p>
17   * @author unascribed
18   * @version 1.0
19   */
20  
21  public interface _RowReaderScrollable extends _RowReader, Serializable   {
22  
23     /**
24      * It is required to compare the row returned by select query.
25      * @return Comparator
26      * @usage RecordSetBuffer
27      * @throws DException
28      */
29  
30     Comparator   getComparator() throws DException;
31  
32     /**
33      * It is required to get the key of the row returned by select query. This
34      * key is needed for ordering purpose.
35      * @param row
36      * @return key of the passed row
37      * @usage RecordSetBuffer
38      * @throws DException
39      */
40  
41     Object   getKey(Object   row) throws DException;
42  }
43

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