Package mondrian.calc.impl

Class ConstantCalc

    • Constructor Detail

      • ConstantCalc

        public ConstantCalc​(Type type,
                    Object o)

    • Method Detail

      • getName

        protected String getName()
        Description copied from class: AbstractCalc
        Returns the name of this expression type, used when serializing an expression to a string.

        The default implementation tries to extract a name from a function call, if any, then prints the last part of the class name.

        Overrides:
        getName in class AbstractCalc

      • collectArguments

        public void collectArguments​(Map<String,​Object> arguments)
        Description copied from class: AbstractCalc
        Collects any other arguments to this calc.

        The default implementation returns name, class, type, resultStyle. A subclass must call super, but may add other arguments.

        Overrides:
        collectArguments in class AbstractCalc
        Parameters:
        arguments - Collection of name/value pairs, represented as a map

      • evaluate

        public Object evaluate​(Evaluator evaluator)
        Description copied from interface: Calc
        Evaluates this expression.
        Parameters:
        evaluator - Provides dimensional context in which to evaluate this expression
        Returns:
        Result of expression evaluation

      • dependsOn

        public boolean dependsOn​(Hierarchy hierarchy)
        Description copied from interface: Calc
        Returns whether this expression depends upon a given hierarchy.

        If it does not depend on the hierarchy, then re-evaluating the expression with a different member of this context must produce the same answer.

        Some examples:

        • The expression
          [Measures].[Unit Sales]
          depends on all dimensions except [Measures].
        • The boolean expression
          ([Measures].[Unit Sales], [Time].[1997]) > 1000
          depends on all hierarchies except [Measures] and [Time].
        • The list expression
          Filter([Store].[USA].Children, [Measures].[Unit Sales] < 50)
          depends upon all hierarchies except [Store] and [Measures]. How so? Normally the scalar expression would depend upon all hierarchies except [Measures], but the Filter function sets the [Store] context before evaluating the scalar expression, so it is not inherited from the surrounding context.

        Specified by:
        dependsOn in interface Calc
        Overrides:
        dependsOn in class AbstractCalc
        Parameters:
        hierarchy - Hierarchy
        Returns:
        Whether this expression's result depends upon the current member of the hierarchy

      • constantInteger

        public static ConstantCalc constantInteger​(int i)
        Creates an expression which evaluates to a given integer.
        Parameters:
        i - Integer value
        Returns:
        Constant integer expression

      • constantDouble

        public static DoubleCalc constantDouble​(double v)
        Creates an expression which evaluates to a given double.
        Parameters:
        v - Double value
        Returns:
        Constant double expression

      • constantString

        public static StringCalc constantString​(String s)
        Creates an expression which evaluates to a given string.
        Parameters:
        s - String value
        Returns:
        Constant string expression

      • constantBoolean

        public static BooleanCalc constantBoolean​(boolean b)
        Creates an expression which evaluates to a given boolean.
        Parameters:
        b - Boolean value
        Returns:
        Constant boolean expression

      • constantNull

        public static ConstantCalc constantNull​(Type type)
        Creates an expression which evaluates to null.
        Parameters:
        type - Type
        Returns:
        Constant null expression

      • constantMember

        public static Calc constantMember​(Member member)
        Creates an expression which evaluates to a given member.
        Parameters:
        member - Member
        Returns:
        Constant member expression

      • constantLevel

        public static Calc constantLevel​(Level level)
        Creates an expression which evaluates to a given level.
        Parameters:
        level - Level
        Returns:
        Constant level expression

      • constantHierarchy

        public static Calc constantHierarchy​(Hierarchy hierarchy)
        Creates an expression which evaluates to a given hierarchy.
        Parameters:
        hierarchy - Hierarchy
        Returns:
        Constant hierarchy expression

      • constantDimension

        public static Calc constantDimension​(Dimension dimension)
        Creates an expression which evaluates to a given dimension.
        Parameters:
        dimension - Dimension
        Returns:
        Constant dimension expression