hep.aida.ref.sql
Class SQLTupleCursor

java.lang.Object
  hep.aida.ref.sql.SQLTupleCursor

All Implemented Interfaces:

FTupleCursor

public class SQLTupleCursor
extends Object
implements FTupleCursor

SQLTupleCursor extends FTupleCursor with SQL backend.

 $Log: SQLTupleCursor.java,v $
 Revision 1.7  2007/05/23 16:38:44  hrivnac
 logical connections for Plotter; better UML

 Revision 1.6  2005/09/02 14:10:31  hrivnac
 moved to JAS3 0.8.2

 Revision 1.5  2004/10/29 22:27:25  hrivnac
 imports corrected

 Revision 1.4  2004/10/12 19:26:59  hrivnac
 MySQL Connector 3.0.14

 Revision 1.3  2004/05/22 15:12:59  hrivnac
 class id reformated

 Revision 1.2  2004/05/04 08:50:33  hrivnac
 can run with JAS3

 Revision 1.1  2004/05/03 19:22:30  hrivnac
 basic support for JAS3

 

Version:

$Id: SQLTupleCursor.java,v 1.7 2007/05/23 16:38:44 hrivnac Exp $

Author:

J.Hrivnac

Field Summary

private boolean	_closed
private SQLTuple	_tuple
private static Logger	log Logging .

Constructor Summary

SQLTupleCursor(SQLTuple tuple)
Create with reference to SQLTuple.

Method Summary

void	close() Close this cursor.
boolean	next() Step to the next row.
int	row() Give the current row number
void	setRow(int n) Step to a specific row.
void	skip(int rows) Skips rows.
void	start() Rewind the Cursor to before the first row.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_tuple

private SQLTuple _tuple

_closed

private boolean _closed

log

private static Logger log

Logging .

Constructor Detail

SQLTupleCursor

public SQLTupleCursor(SQLTuple tuple)

Create with reference to SQLTuple.

Parameters:

tuple - The SQLTuple containing requested column.

Method Detail

row

public int row()
        throws IllegalStateException

Give the current row number

Specified by:

row in interface FTupleCursor

Returns:

The current row number, or -1 if before the first row.

Throws:

IllegalStateException

start

public void start()
           throws IllegalStateException

Rewind the Cursor to before the first row.

Specified by:

start in interface FTupleCursor

Throws:

IllegalStateException

next

public boolean next()
             throws IllegalStateException

Step to the next row.

Specified by:

next in interface FTupleCursor

Returns:

False if there are no more rows.

Throws:

IllegalStateException

skip

public void skip(int rows)
          throws IllegalStateException

Skips rows.

Specified by:

skip in interface FTupleCursor

Parameters:

rows - The number of rows to skip, greater than 0.

Throws:

IllegalStateException

setRow

public void setRow(int n)
            throws IllegalStateException

Step to a specific row.

Specified by:

setRow in interface FTupleCursor

Parameters:

n - The row to move to.

Throws:

IndexOutOfBoundsException - if the index is < 0 or >= number of rows.

UnsupportedOperationException - if the Tuple does not support random access.

IllegalStateException

close

public void close()

Close this cursor. Any further attempts to use the cursor will result in an IllegalStateException.