Package mondrian.olap.fun

Class NativizeSetFunDef.NonNativeCalc

java.lang.Object

mondrian.olap.fun.NativizeSetFunDef.NonNativeCalc

All Implemented Interfaces:

Calc

Direct Known Subclasses:

NativizeSetFunDef.NonNativeIterCalc, NativizeSetFunDef.NonNativeListCalc

Enclosing class:

NativizeSetFunDef

static class NativizeSetFunDef.NonNativeCalc
extends Object
implements Calc

Field Summary

Fields

Modifier and Type	Field	Description
(package private) boolean	nativeEnabled
(package private) Calc	parent

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	NonNativeCalc(Calc parent, boolean nativeEnabled)

Method Summary

Modifier and Type	Method	Description
void	accept(CalcWriter calcWriter)	Prints this expression, by accepting a visiting CalcWriter.
boolean	dependsOn(Hierarchy hierarchy)	Returns whether this expression depends upon a given hierarchy.
Object	evaluate(Evaluator evaluator)	Evaluates this expression.
ResultStyle	getResultStyle()	Returns style in which the result of evaluating this expression is returned.
Type	getType()	Returns the type of this expression.
boolean	isWrapperFor(Class<?> iface)	Default implementation just does 'instanceof TargetClass'.
<T> T	unwrap(Class<T> iface)	Default implementation just casts to TargetClass.

Methods inherited from class java.lang.Object

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

Field Detail

parent

final Calc parent

nativeEnabled

final boolean nativeEnabled

Constructor Detail

NonNativeCalc

protected NonNativeCalc(Calc parent,
                        boolean nativeEnabled)

Method Detail

evaluate

public Object evaluate(Evaluator evaluator)

Description copied from interface: Calc

Evaluates this expression.

Specified by:

evaluate in interface Calc

Parameters:

evaluator - Provides dimensional context in which to evaluate this expression

Returns:

Result of expression evaluation

dependsOn

public boolean dependsOn(Hierarchy hierarchy)

Description copied from interface: Calc

Returns whether this expression depends upon a given hierarchy.

If it does not depend on the hierarchy, then re-evaluating the expression with a different member of this context must produce the same answer.

Some examples:

• The expression

  [Measures].[Unit Sales]

  depends on all dimensions except [Measures].
• The boolean expression

  ([Measures].[Unit Sales], [Time].[1997]) > 1000

  depends on all hierarchies except [Measures] and [Time].
• The list expression

  Filter([Store].[USA].Children, [Measures].[Unit Sales] < 50)

  depends upon all hierarchies except [Store] and [Measures]. How so? Normally the scalar expression would depend upon all hierarchies except [Measures], but the Filter function sets the [Store] context before evaluating the scalar expression, so it is not inherited from the surrounding context.

Specified by:

dependsOn in interface Calc

Parameters:

hierarchy - Hierarchy

Returns:

Whether this expression's result depends upon the current member of the hierarchy

getType

public Type getType()

Description copied from interface: Calc

Returns the type of this expression.

Specified by:

getType in interface Calc

accept

public void accept(CalcWriter calcWriter)

Description copied from interface: Calc

Prints this expression, by accepting a visiting CalcWriter.

Specified by:

accept in interface Calc

Parameters:

calcWriter - Writer

getResultStyle

public ResultStyle getResultStyle()

Description copied from interface: Calc

Returns style in which the result of evaluating this expression is returned.

One application of this method is for the compiler to figure out whether the compiled expression is returning a mutable list. If a mutable list is required, the compiler can create a mutable copy.

Specified by:

getResultStyle in interface Calc

See Also:

ExpCompiler.compileList(mondrian.olap.Exp, boolean)

isWrapperFor

public boolean isWrapperFor(Class<?> iface)

Default implementation just does 'instanceof TargetClass'. Subtypes that are wrappers should override.

Specified by:

isWrapperFor in interface Calc

unwrap

public <T> T unwrap(Class<T> iface)

Default implementation just casts to TargetClass. Subtypes that are wrappers should override.

Specified by:

unwrap in interface Calc