Package mondrian.rolap

Class RolapResult.CellInfoPool

java.lang.Object

mondrian.rolap.RolapResult.CellInfoPool

All Implemented Interfaces:

RolapResult.CellInfoContainer

Enclosing class:

RolapResult

static class RolapResult.CellInfoPool
extends Object
implements RolapResult.CellInfoContainer

Implementation of RolapResult.CellInfoContainer which uses an ObjectPool to store RolapResult.CellInfo Objects.

There is an inner interface (CellKeyMaker) and implementations for 0 through 4 axes that convert the Cell position integer array into a long.

It should be noted that there is an alternate approach. As the executeStripe method is recursively called, at each call it is known which axis is being iterated across and it is known whether or not the Position object for that axis is a List or just an Iterable. It it is a List, then one knows the real size of the axis. If it is an Iterable, then one has to use one of the MAX_AXIS_SIZE values. Given that this information is available when one recursives down to the next executeStripe call, the Cell ordinal, the position integer array could converted to an long, could be generated on the call stack!! Just a thought for the future.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static interface	RolapResult.CellInfoPool.CellKeyMaker	Implementations of CellKeyMaker convert the Cell position integer array to a long.
(package private) static class	RolapResult.CellInfoPool.Four	For axis of size 4.
(package private) static class	RolapResult.CellInfoPool.One	For axis of size 1.
(package private) static class	RolapResult.CellInfoPool.Three	For axis of size 3.
(package private) static class	RolapResult.CellInfoPool.Two	For axis of size 2.
(package private) static class	RolapResult.CellInfoPool.Zero	For axis of size 0.

Field Summary

Fields

Modifier and Type	Field	Description
protected static long	MAX_AXIS_SIZE_2	The maximum number of Members, 2,147,483,647, that can be any given Axis when the number of Axes is 2.
protected static long	MAX_AXIS_SIZE_3	The maximum number of Members, 2,000,000, that can be any given Axis when the number of Axes is 3.
protected static long	MAX_AXIS_SIZE_4	The maximum number of Members, 50,000, that can be any given Axis when the number of Axes is 4.

Constructor Summary

Constructors

Constructor	Description
CellInfoPool(int axisLength)
CellInfoPool(int axisLength, int initialSize)

Method Summary

Modifier and Type	Method	Description
void	clear()	Removes all CellInfo objects from container.
RolapResult.CellInfo	create(int[] pos)	Creates a new CellInfo object, adds it to the container a location pos and returns it.
RolapResult.CellInfo	lookup(int[] pos)	Gets the CellInfo object at the location pos.
int	size()	Returns the number of CellInfo objects in this container.
void	trimToSize()	Reduces the size of the internal data structures needed to support the current entries.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_AXIS_SIZE_2

protected static final long MAX_AXIS_SIZE_2

The maximum number of Members, 2,147,483,647, that can be any given Axis when the number of Axes is 2.

See Also:

Constant Field Values

MAX_AXIS_SIZE_3

protected static final long MAX_AXIS_SIZE_3

The maximum number of Members, 2,000,000, that can be any given Axis when the number of Axes is 3.

See Also:

Constant Field Values

MAX_AXIS_SIZE_4

protected static final long MAX_AXIS_SIZE_4

The maximum number of Members, 50,000, that can be any given Axis when the number of Axes is 4.

See Also:

Constant Field Values

Constructor Detail

CellInfoPool

CellInfoPool(int axisLength)

CellInfoPool

CellInfoPool(int axisLength,
             int initialSize)

Method Detail

size

public int size()

Description copied from interface: RolapResult.CellInfoContainer

Returns the number of CellInfo objects in this container.

Specified by:

size in interface RolapResult.CellInfoContainer

Returns:

the number of CellInfo objects.

trimToSize

public void trimToSize()

Description copied from interface: RolapResult.CellInfoContainer

Reduces the size of the internal data structures needed to support the current entries. This should be called after all CellInfo objects have been added to container.

Specified by:

trimToSize in interface RolapResult.CellInfoContainer

clear

public void clear()

Description copied from interface: RolapResult.CellInfoContainer

Removes all CellInfo objects from container. Does not change the size of the internal data structures.

Specified by:

clear in interface RolapResult.CellInfoContainer

create

public RolapResult.CellInfo create(int[] pos)

Description copied from interface: RolapResult.CellInfoContainer

Creates a new CellInfo object, adds it to the container a location pos and returns it.

Specified by:

create in interface RolapResult.CellInfoContainer

Parameters:

pos - where to store CellInfo object.

Returns:

the newly create CellInfo object.

lookup

public RolapResult.CellInfo lookup(int[] pos)

Description copied from interface: RolapResult.CellInfoContainer

Gets the CellInfo object at the location pos.

Specified by:

lookup in interface RolapResult.CellInfoContainer

Parameters:

pos - where to find the CellInfo object.

Returns:

the CellInfo found or null.