mondrian.olap.fun

Class HierarchyCurrentMemberFunDef.CalcImpl

java.lang.Object

mondrian.calc.impl.AbstractCalc

mondrian.calc.impl.AbstractMemberCalc

mondrian.olap.fun.HierarchyCurrentMemberFunDef.CalcImpl

All Implemented Interfaces:

Calc, MemberCalc

Enclosing class:

HierarchyCurrentMemberFunDef

public static class HierarchyCurrentMemberFunDef.CalcImpl
extends AbstractMemberCalc

Compiled implementation of the Hierarchy.CurrentMember function that evaluates the hierarchy expression first.

Field Summary

Fields inherited from class mondrian.calc.impl.AbstractCalc

exp, type

Constructor Summary

Constructors

Constructor and Description
CalcImpl(Exp exp, HierarchyCalc hierarchyCalc)

Method Summary

Modifier and Type	Method and Description
boolean	dependsOn(Hierarchy hierarchy) Returns whether this expression depends upon a given hierarchy.
Member	evaluateMember(Evaluator evaluator) Evaluates this expression to yield a member.
protected String	getName() Returns the name of this expression type, used when serializing an expression to a string.

Methods inherited from class mondrian.calc.impl.AbstractMemberCalc

evaluate

Methods inherited from class mondrian.calc.impl.AbstractCalc

accept, anyDepends, anyDependsButFirst, butDepends, collectArguments, getArguments, getCalcs, getResultStyle, getType, isWrapperFor, simplifyEvaluator, unwrap

Methods inherited from class java.lang.Object

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

Methods inherited from interface mondrian.calc.Calc

accept, getResultStyle, getType, isWrapperFor, unwrap

Constructor Detail

CalcImpl

public CalcImpl(Exp exp,
                HierarchyCalc hierarchyCalc)

Method Detail

getName

protected String getName()

Description copied from class: AbstractCalc

Returns the name of this expression type, used when serializing an expression to a string.

The default implementation tries to extract a name from a function call, if any, then prints the last part of the class name.

Overrides:

getName in class AbstractCalc

evaluateMember

public Member evaluateMember(Evaluator evaluator)

Description copied from interface: MemberCalc

Evaluates this expression to yield a member.

May return the null member (see Hierarchy.getNullMember()) but never null.

Parameters:

evaluator - Evaluation context

Returns:

a member

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

Overrides:

dependsOn in class AbstractCalc

Parameters:

hierarchy - Hierarchy

Returns:

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