Package org.pentaho.reporting.engine.classic.core.states.crosstab

Class SortedMergeCrosstabSpecification

java.lang.Object

org.pentaho.reporting.engine.classic.core.states.crosstab.SortedMergeCrosstabSpecification

All Implemented Interfaces:

Serializable, CrosstabSpecification

public class SortedMergeCrosstabSpecification
extends Object
implements CrosstabSpecification

Computed structural data of a crosstab. It basically contains the full dataset of the column axis, which then allows us to inject artificial rows into the dataset.

This mode uses the order in which elements occur in the datastream as normalized order of dimension elements, and if there is ambiguity, it sorts elements by their natural order as well.

We have the assumption, that the data is already pre-sorted in some way and that all rows are given in that order. We assume that all items are comparable and that the items are sorted according to the natural order of the key. This mode is intended to be used for raw-data crosstabs only. It consumes less memory than the ordered merge.

Author:

Thomas Morgner

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
SortedMergeCrosstabSpecification(ReportStateKey key, String[] dimensionColumnSet, String[] rowColumnSet)

Method Summary

Modifier and Type	Method	Description
void	add(DataRow dataRow)
void	endCrosstab()
void	endRow()
String[]	getColumnDimensionNames()
ReportStateKey	getKey()
Object[]	getKeyAt(int column)
String[]	getRowDimensionNames()
int	indexOf(int start, Object[] key)
int	size()	The number of columns encountered.
void	startRow()

Methods inherited from class java.lang.Object

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

Constructor Detail

SortedMergeCrosstabSpecification

public SortedMergeCrosstabSpecification(ReportStateKey key,
                                        String[] dimensionColumnSet,
                                        String[] rowColumnSet)

Method Detail

indexOf

public int indexOf(int start,
                   Object[] key)

Specified by:

indexOf in interface CrosstabSpecification

getColumnDimensionNames

public String[] getColumnDimensionNames()

Specified by:

getColumnDimensionNames in interface CrosstabSpecification

getRowDimensionNames

public String[] getRowDimensionNames()

Specified by:

getRowDimensionNames in interface CrosstabSpecification

getKey

public ReportStateKey getKey()

Specified by:

getKey in interface CrosstabSpecification

startRow

public void startRow()

Specified by:

startRow in interface CrosstabSpecification

endRow

public void endRow()

Specified by:

endRow in interface CrosstabSpecification

endCrosstab

public void endCrosstab()

Specified by:

endCrosstab in interface CrosstabSpecification

add

public void add(DataRow dataRow)

Specified by:

add in interface CrosstabSpecification

size

public int size()

Description copied from interface: CrosstabSpecification

The number of columns encountered.

Specified by:

size in interface CrosstabSpecification

Returns:

getKeyAt

public Object[] getKeyAt(int column)

Specified by:

getKeyAt in interface CrosstabSpecification