de.erichseifert.gral.data

Class EnumeratedData

java.lang.Object

de.erichseifert.gral.data.AbstractDataSource

de.erichseifert.gral.data.EnumeratedData

All Implemented Interfaces:

DataListener, DataSource, java.io.Serializable, java.lang.Iterable<java.lang.Comparable<?>>

public class EnumeratedData
extends AbstractDataSource
implements DataListener

Class that creates a new data source which adds a leading column containing the row number.

Example which creates a two column data source from a one column histogram:

 DataSource hist = new Histogram2D(data, Orientation.HORIZONTAL, 10);
 DataSource hist2d = new EnumeratedData(hist);
 

See Also:

DataSource, Serialized Form

Constructor Summary

Constructors

Constructor and Description
EnumeratedData(DataSource original) Initializes a new data source based on an original data source which will contain an additional column which enumerates all rows.
EnumeratedData(DataSource original, double offset, double steps) Initializes a new data source based on an original data source which will contain an additional column which enumerates all rows.

Method Summary

Modifier and Type	Method and Description
void	dataAdded(DataSource source, DataChangeEvent... events) Method that is invoked when data has been added.
void	dataRemoved(DataSource source, DataChangeEvent... events) Method that is invoked when data has been added.
void	dataUpdated(DataSource source, DataChangeEvent... events) Method that is invoked when data has been updated.
java.lang.Comparable<?>	get(int col, int row) Returns the row with the specified index.
int	getRowCount() Returns the number of rows of the data source.

Methods inherited from class de.erichseifert.gral.data.AbstractDataSource

addDataListener, getColumn, getColumnCount, getColumnStatistics, getColumnTypes, getName, getRecord, getRow, getRowStatistics, getStatistics, isColumnNumeric, iterator, removeDataListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

EnumeratedData

public EnumeratedData(DataSource original,
                      double offset,
                      double steps)

Initializes a new data source based on an original data source which will contain an additional column which enumerates all rows. The enumeration will start at a specified offset and will have a specified step size.

Parameters:

original - Original data source.

offset - Offset of enumeration

steps - Scaling of enumeration

EnumeratedData

public EnumeratedData(DataSource original)

Initializes a new data source based on an original data source which will contain an additional column which enumerates all rows.

Parameters:

original - Original data source.

Method Detail

get

public java.lang.Comparable<?> get(int col,
                                   int row)

Returns the row with the specified index.

Specified by:

get in interface DataSource

Parameters:

col - index of the column to return

row - index of the row to return

Returns:

the specified value of the data cell

getRowCount

public int getRowCount()

Returns the number of rows of the data source.

Specified by:

getRowCount in interface DataSource

Returns:

number of rows in the data source.

dataAdded

public void dataAdded(DataSource source,
                      DataChangeEvent... events)

Method that is invoked when data has been added. This method is invoked by objects that provide support for DataListeners and should not be called manually.

Specified by:

dataAdded in interface DataListener

Parameters:

source - Data source that has been changed.

events - Optional event object describing the data values that have been added.

dataUpdated

public void dataUpdated(DataSource source,
                        DataChangeEvent... events)

Method that is invoked when data has been updated. This method is invoked by objects that provide support for DataListeners and should not be called manually.

Specified by:

dataUpdated in interface DataListener

Parameters:

source - Data source that has been changed.

events - Optional event object describing the data values that have been updated.

dataRemoved

public void dataRemoved(DataSource source,
                        DataChangeEvent... events)

Method that is invoked when data has been added. This method is invoked by objects that provide support for DataListeners and should not be called manually.

Specified by:

dataRemoved in interface DataListener

Parameters:

source - Data source that has been changed.

events - Optional event object describing the data values that have been removed.