edu.udo.cs.yale.example
Class DatabaseDataRow

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

All Implemented Interfaces:

DataRow

public class DatabaseDataRow
extends java.lang.Object
implements DataRow

Reads datarows from a data base.

Version:

$Id: DatabaseDataRow.java,v 2.17 2006/09/29 10:59:41 ingomierswa Exp $

Author:

Ingo Mierswa, Simon Fischer

Field Summary

private java.sql.ResultSet	resultSet The result set which backs this data row.
private int	row The current row of the result set.

Constructor Summary

DatabaseDataRow(java.sql.ResultSet resultSet)
Creates a data row from the given result set.

Method Summary

void	ensureNumberOfColumns(int numberOfColumns) Does nothing.
private void	ensureRowCorrect() Ensures that the current row is the current row of the result set.
double	get(Attribute attribute) Returns the desired data for the given attribute.
static double	readColumn(java.sql.ResultSet resultSet, Attribute attribute) Reads the data for the given attribute from the result set.
void	set(Attribute attribute, double value) Sets the given data for the given attribute.
void	trim() Does nothing.

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

The result set which backs this data row.

row

private int row

The current row of the result set.

Constructor Detail

DatabaseDataRow

public DatabaseDataRow(java.sql.ResultSet resultSet)
                throws java.sql.SQLException

Creates a data row from the given result set. The current row of the result set if used as data source.

Throws:

java.sql.SQLException

Method Detail

ensureRowCorrect

private void ensureRowCorrect()
                       throws java.sql.SQLException

Ensures that the current row is the current row of the result set.

Throws:

java.sql.SQLException

get

public double get(Attribute attribute)

Returns the desired data for the given attribute.

Specified by:

get in interface DataRow

set

public void set(Attribute attribute,
                double value)

Sets the given data for the given attribute.

Specified by:

set in interface DataRow

ensureNumberOfColumns

public void ensureNumberOfColumns(int numberOfColumns)

Does nothing.

Specified by:

ensureNumberOfColumns in interface DataRow

trim

public void trim()

Does nothing.

Specified by:

trim in interface DataRow

readColumn

public static double readColumn(java.sql.ResultSet resultSet,
                                Attribute attribute)
                         throws java.sql.SQLException

Reads the data for the given attribute from the result set.

Throws:

java.sql.SQLException