edu.udo.cs.yale.example
Class DatabaseDataRowReader

java.lang.Object
  edu.udo.cs.yale.example.DatabaseDataRowReader

All Implemented Interfaces:

DataRowReader, java.util.Iterator<DataRow>

public class DatabaseDataRowReader
extends java.lang.Object
implements DataRowReader

Unlike a FileDataRowReader that reads examples from a file, objects of this class read examples from a ResultSet, a data structure that is returned from a database query.

Version:

$Id: DatabaseDataRowReader.java,v 2.15 2006/03/21 15:35:39 ingomierswa Exp $

Author:

Simon Fischer, Ingo Mierswa

See Also:

DatabaseHandler, DatabaseExampleSource, KDBExampleSource

Field Summary

private static int	DONT_KNOW_YET
private int	hasNext
private static int	NO
private java.sql.ResultSet	resultSet
private static int	YES

Constructor Summary

DatabaseDataRowReader(java.sql.ResultSet resultSet)
Creates a datarow reader from a ResultSet.

Method Summary

boolean	hasNext()
DataRow	next()
void	remove() Will throw a new UnsupportedOperationException since DataRowReader does not have to implement remove.

Methods inherited from class java.lang.Object

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

Field Detail

resultSet

private java.sql.ResultSet resultSet

DONT_KNOW_YET

private static final int DONT_KNOW_YET

See Also:

Constant Field Values

YES

private static final int YES

See Also:

Constant Field Values

NO

private static final int NO

See Also:

Constant Field Values

hasNext

private int hasNext

Constructor Detail

DatabaseDataRowReader

public DatabaseDataRowReader(java.sql.ResultSet resultSet)

Creates a datarow reader from a ResultSet. The column meta data must be tranformed to an Attribute array.

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<DataRow>

next

public DataRow next()

Specified by:

next in interface java.util.Iterator<DataRow>

remove

public void remove()

Will throw a new UnsupportedOperationException since DataRowReader does not have to implement remove.

Specified by:

remove in interface java.util.Iterator<DataRow>