mondrian.rolap
Class RolapTupleCalculation

java.lang.Object
  mondrian.rolap.RolapTupleCalculation

All Implemented Interfaces:

RolapCalculation

 class RolapTupleCalculation
extends java.lang.Object
implements RolapCalculation

Implementation of RolapCalculation that changes one or more dimensions, then evaluates a given calculation.

It is used to implement sets in slicers, in particular sets of tuples in the slicer.

Since:

May 15, 2009

Version:

$Id: //open/mondrian/src/main/mondrian/rolap/RolapTupleCalculation.java#3 $

Author:

jhyde

Constructor Summary

RolapTupleCalculation(java.util.List<RolapHierarchy> hierarchyList, Calc calc)
Creates a RolapTupleCalculation.

Method Summary

boolean	containsAggregateFunction() Returns whether this calculation contains an aggregate function.
Calc	getCompiledExpression(RolapEvaluatorRoot root) Returns the compiled expression to evaluate the scalar value of the current cell.
int	getHierarchyOrdinal() Returns the ordinal of this calculation; to resolve ties.
int	getSolveOrder() Returns the solve order of this calculation.
boolean	isCalculatedInQuery() Returns whether this calculation is a member is computed from a WITH MEMBER clause in an MDX query.
RolapEvaluator	pushSelf(RolapEvaluator evaluator) Pushes this calculated member or tuple onto the stack of evaluation contexts, sets the context to the default member of the hierarchy, and returns the evaluator containing the new context.

Methods inherited from class java.lang.Object

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

Constructor Detail

RolapTupleCalculation

public RolapTupleCalculation(java.util.List<RolapHierarchy> hierarchyList,
                             Calc calc)

Creates a RolapTupleCalculation.

Parameters:

hierarchyList - List of hierarchies to be replaced.

calc - Compiled scalar expression to compute cell

Method Detail

pushSelf

public RolapEvaluator pushSelf(RolapEvaluator evaluator)

Description copied from interface: RolapCalculation

Pushes this calculated member or tuple onto the stack of evaluation contexts, sets the context to the default member of the hierarchy, and returns the evaluator containing the new context.

Specified by:

pushSelf in interface RolapCalculation

Parameters:

evaluator - Current evaluator

Returns:

New evaluator

getSolveOrder

public int getSolveOrder()

Description copied from interface: RolapCalculation

Returns the solve order of this calculation. Identifies which order calculations are expanded.

Specified by:

getSolveOrder in interface RolapCalculation

Returns:

Solve order

getHierarchyOrdinal

public int getHierarchyOrdinal()

Description copied from interface: RolapCalculation

Returns the ordinal of this calculation; to resolve ties.

Specified by:

getHierarchyOrdinal in interface RolapCalculation

Returns:

Ordinal or calculation

getCompiledExpression

public Calc getCompiledExpression(RolapEvaluatorRoot root)

Description copied from interface: RolapCalculation

Returns the compiled expression to evaluate the scalar value of the current cell. This method will be called frequently, so the implementation should probably compile once and cache the result.

Specified by:

getCompiledExpression in interface RolapCalculation

Parameters:

root - Root evaluation context

Returns:

Compiled scalar expression

containsAggregateFunction

public boolean containsAggregateFunction()

Description copied from interface: RolapCalculation

Returns whether this calculation contains an aggregate function.

Specified by:

containsAggregateFunction in interface RolapCalculation

Returns:

Whether this calculation contains an aggregate function.

isCalculatedInQuery

public boolean isCalculatedInQuery()

Description copied from interface: RolapCalculation

Returns whether this calculation is a member is computed from a WITH MEMBER clause in an MDX query.

Specified by:

isCalculatedInQuery in interface RolapCalculation