Package mondrian.olap.fun

Class SetFunDef

  • All Implemented Interfaces:
    FunDef
    public class SetFunDef
extends FunDefBase
    SetFunDef implements the 'set' function (whose syntax is the brace operator, { ... }).
    Since:
    3 March, 2002
    Author:
    jhyde

    • 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

      • wrapAsSet

        public static ResolvedFunCall wrapAsSet​(Exp... args)
        Creates a call to the set operator with a given collection of expressions.

        There must be at least one expression. Each expression may be a set of members/tuples, or may be a member/tuple, but method assumes that expressions have compatible types.

        Parameters:
        args - Expressions
        Returns:
        Call to set operator