Package mondrian.olap.fun

Class SetFunDef

java.lang.Object
org.eigenbase.xom.XMLUtil
org.eigenbase.xom.XOMUtil
mondrian.olap.Util
mondrian.olap.fun.FunUtil
mondrian.olap.fun.FunDefBase
mondrian.olap.fun.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 Details

    • unparse

      public void unparse(Exp[] args, PrintWriter pw)
      Description copied from interface: FunDef
      Converts a function call into MDX source code.
      Specified by:
      unparse in interface FunDef
      Overrides:
      unparse in class FunDefBase

    • 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