Package mondrian.rolap

Class FastBatchingCellReader

java.lang.Object

mondrian.rolap.FastBatchingCellReader

public class FastBatchingCellReader
extends Object

A FastBatchingCellReader doesn't really Read cells: when asked to look up the values of stored measures, it lies, and records the fact that the value was asked for. Later, we can look over the values which are required, fetch them in an efficient way, and re-run the evaluation with a real evaluator.

NOTE: When it doesn't know the answer, it lies by returning an error object. The calling code must be able to deal with that.

This class tries to minimize the amount of storage needed to record the fact that a cell was requested.

Constructor Summary

Constructors

Constructor	Description
FastBatchingCellReader(Execution execution, RolapCube cube, AggregationManager aggMgr)	Creates a FastBatchingCellReader.

Method Summary

Modifier and Type	Method	Description
Object	get(RolapEvaluator evaluator)
int	getHitCount()
int	getMissCount()
int	getPendingCount()
boolean	isDirty()	Returns whether this reader has told a lie.
final void	recordCellRequest(CellRequest request)

Methods inherited from class java.lang.Object

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

Constructor Details

FastBatchingCellReader

public FastBatchingCellReader(Execution execution,
 RolapCube cube,
 AggregationManager aggMgr)

Creates a FastBatchingCellReader.

Parameters:

execution - Execution that calling statement belongs to. Allows us to check for cancel

cube - Cube that requests belong to

aggMgr - Aggregation manager

Method Details

get

public Object get(RolapEvaluator evaluator)

getMissCount

public int getMissCount()

getHitCount

public int getHitCount()

getPendingCount

public int getPendingCount()

recordCellRequest

public final void recordCellRequest(CellRequest request)

isDirty

public boolean isDirty()

Returns whether this reader has told a lie. This is the case if there are pending batches to load or if setDirty(boolean) has been called.