org.mazarineblue.datasources

Class NullDataSource

java.lang.Object

org.mazarineblue.datasources.AbstractSource

org.mazarineblue.datasources.ArraySource

org.mazarineblue.datasources.NullDataSource

All Implemented Interfaces:

DataSource, VariableSource

public class NullDataSource
extends ArraySource

Author:

Alex de Kruijff <alex.de.kruijff@MazarineBlue.org>

Constructor Summary

Constructors

Constructor and Description
NullDataSource()
NullDataSource(String sourceName)

Method Summary

Modifier and Type	Method and Description
String[]	getColumns() Returns an array of supported columns.
Object	getData(int index)
Object	getData(String column) Return the object at the specified column.
boolean	setData(int index, Object value) Sets the specified value to the specivied column.
boolean	setData(String column, Object value) Return the object at the specified index.

Methods inherited from class org.mazarineblue.datasources.ArraySource

getLineIdentifier, hasNext, next, reset, validateState

Methods inherited from class org.mazarineblue.datasources.AbstractSource

getSourceIdentifier

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mazarineblue.datasources.DataSource

getData, getData, reset

Constructor Detail

NullDataSource

public NullDataSource()

NullDataSource

public NullDataSource(String sourceName)

Method Detail

getData

public Object getData(String column)
               throws IllegalSourceStateException

Description copied from interface: DataSource

Return the object at the specified column.

Parameters:

column - the location where the object resides.

Returns:

the object at the specified index or null if it could not be fetched.

Throws:

IllegalSourceStateException - when the method could not be called due to the state of the source i.e. next() has not been called or this method is not supported by the data source. when next() has not been

getData

public Object getData(int index)
               throws IllegalSourceStateException

Throws:

IllegalSourceStateException

setData

public boolean setData(String column,
                       Object value)
                throws Exception

Description copied from interface: DataSource

Return the object at the specified index.

Parameters:

column - the location where the object should be stored.

value - the object to store.

Returns:

the object at the specified index or null if it could not be fetched.

Throws:

Exception

setData

public boolean setData(int index,
                       Object value)

Description copied from interface: DataSource

Sets the specified value to the specivied column.

Parameters:

index - the location where the object should be stored.

value - the object to store.

Returns:

the object at the specified index or null if it could not be fetched.

getColumns

public String[] getColumns()

Description copied from interface: DataSource

Returns an array of supported columns.

Returns:

an array of supported columns or an empty array when none are supported by this data source.