Package mondrian.rolap

Class RolapNative

java.lang.Object

mondrian.rolap.RolapNative

Direct Known Subclasses:

RolapNativeRegistry, RolapNativeSet

public abstract class RolapNative
extends Object

A factory for NativeEvaluator. If the instance returns null, then the interpreter must compute the result itself. If it returns a NativeEvaluator the interpreter may choose to let the NativeEvaluator compute the result.

There exist multiple RolapNative implementations, e.g. for CrossJoin, TopCount, Filter etc. If the arguments of these functions are simple enough to be evaluated in SQL then a NativeEvaluator will be returned that performs the computations in SQL. Otherwise null will be returned.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static interface	RolapNative.Listener
(package private) static class	RolapNative.NativeEvent
(package private) static class	RolapNative.TupleEvent

Field Summary

Fields

Modifier and Type	Field	Description
protected RolapNative.Listener	listener

Constructor Summary

Constructors

Constructor	Description
RolapNative()

Method Summary

Modifier and Type	Method	Description
(package private) abstract NativeEvaluator	createEvaluator(RolapEvaluator evaluator, FunDef fun, Exp[] args)	If function can be implemented in SQL, returns a NativeEvaluator that computes the result; otherwise returns null.
(package private) RolapNative.Listener	getListener()
(package private) boolean	isEnabled()	if enabled == false, then createEvaluator will always return null
(package private) void	setEnabled(boolean enabled)
(package private) void	setListener(RolapNative.Listener listener)
(package private) abstract void	useHardCache(boolean hard)	Sets whether to use hard caching for testing.

Methods inherited from class java.lang.Object

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

Field Detail

listener

protected RolapNative.Listener listener

Constructor Detail

RolapNative

public RolapNative()

Method Detail

createEvaluator

abstract NativeEvaluator createEvaluator(RolapEvaluator evaluator,
                                         FunDef fun,
                                         Exp[] args)

If function can be implemented in SQL, returns a NativeEvaluator that computes the result; otherwise returns null.

isEnabled

boolean isEnabled()

if enabled == false, then createEvaluator will always return null

setEnabled

void setEnabled(boolean enabled)

getListener

RolapNative.Listener getListener()

setListener

void setListener(RolapNative.Listener listener)

useHardCache

abstract void useHardCache(boolean hard)

Sets whether to use hard caching for testing. When using soft references, we can not test caching because things may be garbage collected during the tests.