Package mondrian.calc.impl

Class GenericCalc

java.lang.Object

mondrian.calc.impl.AbstractCalc

mondrian.calc.impl.GenericCalc

All Implemented Interfaces:

BooleanCalc, Calc, DateTimeCalc, DimensionCalc, DoubleCalc, HierarchyCalc, IntegerCalc, LevelCalc, MemberCalc, StringCalc, TupleCalc, VoidCalc

Direct Known Subclasses:

AbstractVoidCalc, AggregateFunDef.AggregateCalc, CacheCalc, ConstantCalc, MemberArrayValueCalc, MemberValueCalc, TupleValueCalc, ValueCalc

public abstract class GenericCalc
extends AbstractCalc
implements TupleCalc, StringCalc, IntegerCalc, DoubleCalc, BooleanCalc, DateTimeCalc, VoidCalc, MemberCalc, LevelCalc, HierarchyCalc, DimensionCalc

Adapter which computes a scalar or tuple expression and converts it to any required type.

Since:

Sep 26, 2005

Author:

jhyde

See Also:

GenericIterCalc

Field Summary

Fields inherited from class mondrian.calc.impl.AbstractCalc

exp, type

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	GenericCalc(Exp exp)	Creates a GenericCalc without specifying child calculated expressions.
protected	GenericCalc(Exp exp, Calc[] calcs)	Creates an GenericCalc.

Method Summary

Modifier and Type	Method	Description
boolean	evaluateBoolean(Evaluator evaluator)	Evaluates this expression to yield a boolean value.
Date	evaluateDateTime(Evaluator evaluator)	Evaluates this expression to yield a Date value.
Dimension	evaluateDimension(Evaluator evaluator)	Evaluates this expression to yield a dimension.
double	evaluateDouble(Evaluator evaluator)	Evaluates this expression to yield a double value.
Hierarchy	evaluateHierarchy(Evaluator evaluator)	Evaluates this expression to yield a hierarchy.
int	evaluateInteger(Evaluator evaluator)	Evaluates this expression to yield an int value.
Level	evaluateLevel(Evaluator evaluator)	Evaluates this expression to yield a level.
Member	evaluateMember(Evaluator evaluator)	Evaluates this expression to yield a member.
String	evaluateString(Evaluator evaluator)	Evaluates this expression to yield a String value.
Member[]	evaluateTuple(Evaluator evaluator)	Evaluates this expression to yield a tuple.
void	evaluateVoid(Evaluator evaluator)
static double	numberToDouble(Number number)

Methods inherited from class mondrian.calc.impl.AbstractCalc

accept, anyDepends, anyDependsButFirst, butDepends, collectArguments, dependsOn, getArguments, getCalcs, getName, 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, dependsOn, evaluate, getResultStyle, getType, isWrapperFor, unwrap

Constructor Detail

GenericCalc

protected GenericCalc(Exp exp)

Creates a GenericCalc without specifying child calculated expressions.

Subclass should override AbstractCalc.getCalcs().

Parameters:

exp - Source expression

GenericCalc

protected GenericCalc(Exp exp,
                      Calc[] calcs)

Creates an GenericCalc.

Parameters:

exp - Source expression

calcs - Child compiled expressions

Method Detail

evaluateTuple

public Member[] evaluateTuple(Evaluator evaluator)

Description copied from interface: TupleCalc

Evaluates this expression to yield a tuple.

A tuple cannot contain any null members. If any of the members is null, this method must return a null.

Specified by:

evaluateTuple in interface TupleCalc

Parameters:

evaluator - Evaluation context

Returns:

an array of members, or null to represent the null tuple

evaluateString

public String evaluateString(Evaluator evaluator)

Description copied from interface: StringCalc

Evaluates this expression to yield a String value.

Specified by:

evaluateString in interface StringCalc

Parameters:

evaluator - Evaluation context

Returns:

evaluation result

evaluateInteger

public int evaluateInteger(Evaluator evaluator)

Description copied from interface: IntegerCalc

Evaluates this expression to yield an int value. If the result is null, returns the special FunUtil.IntegerNull value.

Specified by:

evaluateInteger in interface IntegerCalc

Parameters:

evaluator - Evaluation context

Returns:

evaluation result

evaluateDouble

public double evaluateDouble(Evaluator evaluator)

Description copied from interface: DoubleCalc

Evaluates this expression to yield a double value. If the result is null, returns the special FunUtil.DoubleNull value.

Specified by:

evaluateDouble in interface DoubleCalc

Parameters:

evaluator - Evaluation context

Returns:

evaluation result

numberToDouble

public static double numberToDouble(Number number)

evaluateBoolean

public boolean evaluateBoolean(Evaluator evaluator)

Description copied from interface: BooleanCalc

Evaluates this expression to yield a boolean value. If the result is null, returns the special FunUtil.BooleanNull value.

Specified by:

evaluateBoolean in interface BooleanCalc

Parameters:

evaluator - Evaluation context

Returns:

evaluation result

evaluateDateTime

public Date evaluateDateTime(Evaluator evaluator)

Description copied from interface: DateTimeCalc

Evaluates this expression to yield a Date value.

Specified by:

evaluateDateTime in interface DateTimeCalc

Parameters:

evaluator - Evaluation context

Returns:

evaluation result

evaluateVoid

public void evaluateVoid(Evaluator evaluator)

Specified by:

evaluateVoid in interface VoidCalc

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.

Specified by:

evaluateMember in interface MemberCalc

Parameters:

evaluator - Evaluation context

Returns:

a member

evaluateLevel

public Level evaluateLevel(Evaluator evaluator)

Description copied from interface: LevelCalc

Evaluates this expression to yield a level.

Never returns null.

Specified by:

evaluateLevel in interface LevelCalc

Parameters:

evaluator - Evaluation context

Returns:

a level

evaluateHierarchy

public Hierarchy evaluateHierarchy(Evaluator evaluator)

Description copied from interface: HierarchyCalc

Evaluates this expression to yield a hierarchy.

Never returns null.

Specified by:

evaluateHierarchy in interface HierarchyCalc

Parameters:

evaluator - Evaluation context

Returns:

a hierarchy

evaluateDimension

public Dimension evaluateDimension(Evaluator evaluator)

Description copied from interface: DimensionCalc

Evaluates this expression to yield a dimension.

Never returns null.

Specified by:

evaluateDimension in interface DimensionCalc

Parameters:

evaluator - Evaluation context

Returns:

a dimension