Package mondrian.olap.fun

Class AbstractAggregateFunDef

  • All Implemented Interfaces:
    FunDef
    Direct Known Subclasses:
    AggregateFunDef, NthQuartileFunDef
    public class AbstractAggregateFunDef
extends FunDefBase
    Abstract base class for all aggregate functions (Aggregate, Sum, Avg, et cetera).
    Since:
    2005/8/14
    Author:
    jhyde

    • Constructor Detail

      • AbstractAggregateFunDef

        public AbstractAggregateFunDef​(FunDef dummyFunDef)

    • Method Detail

      • validateArg

        protected Exp validateArg​(Validator validator,
                          Exp[] args,
                          int i,
                          int category)
        Description copied from class: FunDefBase
        Validates an argument to a call to this function.

        The default implementation of this method adds an implicit conversion to the correct type. Derived classes may override.

        Overrides:
        validateArg in class FunDefBase
        Parameters:
        validator - Validator
        args - Arguments to this function
        i - Ordinal of argument
        category - Expected category of argument
        Returns:
        Validated argument

      • evaluateCurrentList

        protected static TupleList evaluateCurrentList​(ListCalc listCalc,
                                               Evaluator evaluator)
        Evaluates the list of members or tuples used in computing the aggregate. If the measure for aggregation has to ignore unrelated dimensions this method will push unrelated dimension members to top level member. This behaviour is driven by the ignoreUnrelatedDimensions property on a base cube usage specified in the virtual cube.Keeps track of the number of iterations that will be required to iterate over the members or tuples needed to compute the aggregate within the current context. In doing so, also determines if the cross product of all iterations across all parent evaluation contexts will exceed the limit set in the properties file.
        Parameters:
        listCalc - calculator used to evaluate the member list
        evaluator - current evaluation context
        Returns:
        list of evaluated members or tuples

      • processUnrelatedDimensions

        public static TupleList processUnrelatedDimensions​(TupleList tuplesForAggregation,
                                                   Evaluator evaluator)
        Pushes unrelated dimensions to the top level member from the given list of tuples if the ignoreUnrelatedDimensions property is set on the base cube usage in the virtual cube.

        If IgnoreMeasureForNonJoiningDimension is set to true and ignoreUnrelatedDimensions on CubeUsage is set to false then if a non joining dimension exists in the aggregation list then return an empty list else return the original list.

        Parameters:
        tuplesForAggregation - is a list of members or tuples used in computing the aggregate
        evaluator - Evaluator
        Returns:
        list of members or tuples