mondrian.rolap.agg
Class DenseSegmentDataset

java.lang.Object
  mondrian.rolap.agg.DenseSegmentDataset

All Implemented Interfaces:

Iterable<Map.Entry<CellKey,Object>>, SegmentDataset

Direct Known Subclasses:

DenseNativeSegmentDataset, DenseObjectSegmentDataset

abstract class DenseSegmentDataset
extends Object
implements SegmentDataset

A DenseSegmentDataset is a means of storing segment values which is suitable when most of the combinations of keys have a value present.

The storage requirements are as follows. Table requires 1 word per cell.

Since:

21 March, 2002

Author:

jhyde

Field Summary

protected int[]

axisMultipliers

Constructor Summary

DenseSegmentDataset(SegmentAxis[] axes)
Creates a DenseSegmentDataset.

Method Summary

double	getBytes() Returns the number of bytes occupied by this dataset.
double	getDouble(CellKey pos) Returns the value at a given coordinate, as a double.
int	getInt(CellKey pos) Returns the value at a given coordinate, as an int.
Object	getObject(CellKey pos) Returns the value at a given coordinate, as an Object.
protected abstract Object	getObject(int i)
protected int	getOffset(int[] keys)
protected int	getOffset(Object[] keys)
protected abstract int	getSize()
Iterator<Map.Entry<CellKey,Object>>	iterator()

Methods inherited from class java.lang.Object

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

Methods inherited from interface mondrian.rolap.agg.SegmentDataset

createSegmentBody, exists, getType, isNull, populateFrom, populateFrom

Field Detail

axisMultipliers

protected final int[] axisMultipliers

Constructor Detail

DenseSegmentDataset

DenseSegmentDataset(SegmentAxis[] axes)

Creates a DenseSegmentDataset.

Parameters:

axes - Segment axes, containing actual column values

Method Detail

getBytes

public final double getBytes()

Description copied from interface: SegmentDataset

Returns the number of bytes occupied by this dataset.

Specified by:

getBytes in interface SegmentDataset

Returns:

number of bytes

iterator

public Iterator<Map.Entry<CellKey,Object>> iterator()

Specified by:

iterator in interface Iterable<Map.Entry<CellKey,Object>>

getObject

protected abstract Object getObject(int i)

getOffset

protected final int getOffset(int[] keys)

getOffset

protected final int getOffset(Object[] keys)

getObject

public Object getObject(CellKey pos)

Description copied from interface: SegmentDataset

Returns the value at a given coordinate, as an Object.

Specified by:

getObject in interface SegmentDataset

Parameters:

pos - Coordinate position

Returns:

Value

getInt

public int getInt(CellKey pos)

Description copied from interface: SegmentDataset

Returns the value at a given coordinate, as an int.

Specified by:

getInt in interface SegmentDataset

Parameters:

pos - Coordinate position

Returns:

Value

getDouble

public double getDouble(CellKey pos)

Description copied from interface: SegmentDataset

Returns the value at a given coordinate, as a double.

Specified by:

getDouble in interface SegmentDataset

Parameters:

pos - Coordinate position

Returns:

Value

getSize

protected abstract int getSize()