Package mondrian.olap.fun

Class IifFunDef

  • All Implemented Interfaces:
    FunDef
    public class IifFunDef
extends FunDefBase
    Definition of the Iif MDX function.
    Since:
    Jan 17, 2008
    Author:
    jhyde

    • Field Detail

      • STRING_INSTANCE

        static final FunDefBase STRING_INSTANCE

      • NUMERIC_INSTANCE

        static final FunDefBase NUMERIC_INSTANCE

      • TUPLE_INSTANCE

        static final FunDefBase TUPLE_INSTANCE

      • BOOLEAN_INSTANCE

        static final FunDefBase BOOLEAN_INSTANCE

      • MEMBER_INSTANCE

        static final IifFunDef MEMBER_INSTANCE

      • LEVEL_INSTANCE

        static final IifFunDef LEVEL_INSTANCE

      • HIERARCHY_INSTANCE

        static final IifFunDef HIERARCHY_INSTANCE

      • DIMENSION_INSTANCE

        static final IifFunDef DIMENSION_INSTANCE

      • SET_INSTANCE

        static final IifFunDef SET_INSTANCE

    • Constructor Detail

      • IifFunDef

        protected IifFunDef​(String name,
                    String description,
                    String flags)
        Creates an IifFunDef.
        Parameters:
        name - Name of the function, for example "Members".
        description - Description of the function
        flags - Encoding of the syntactic, return, and parameter types

    • Method Detail

      • getResultType

        public Type getResultType​(Validator validator,
                          Exp[] args)
        Description copied from class: FunDefBase
        Returns the type of a call to this function with a given set of arguments.

        The default implementation makes the coarse assumption that the return type is in some way related to the type of the first argument. Operators whose arguments don't follow the requirements of this implementation should override this method.

        If the function definition says it returns a literal type (numeric, string, symbol) then it's a fair guess that the function call returns the same kind of value.

        If the function definition says it returns an object type (cube, dimension, hierarchy, level, member) then we check the first argument of the function. Suppose that the function definition says that it returns a hierarchy, and the first argument of the function happens to be a member. Then it's reasonable to assume that this function returns a member.

        Overrides:
        getResultType in class FunDefBase
        Parameters:
        validator - Validator
        args - Arguments to the call to this operator
        Returns:
        result type of a call this function

      • compileCall

        public Calc compileCall​(ResolvedFunCall call,
                        ExpCompiler compiler)
        Description copied from interface: FunDef
        Converts a call to this function into executable objects.

        The result must implement the appropriate interface for the result type. For example, a function which returns an integer must return an object which implements IntegerCalc.

        Specified by:
        compileCall in interface FunDef
        Overrides:
        compileCall in class FunDefBase