Package mondrian.mdx

Class ParameterExpr

java.lang.Object
mondrian.olap.QueryPart
mondrian.olap.ExpBase
mondrian.mdx.ParameterExpr
All Implemented Interfaces:
Exp
public class ParameterExpr extends ExpBase
MDX expression which is a usage of a Parameter.
Author:
jhyde

  • Constructor Details

    • ParameterExpr

      public ParameterExpr(Parameter parameter)
      Creates a ParameterExpr.
      Parameters:
      parameter - Parameter

  • Method Details

    • getType

      public Type getType()
      Description copied from interface: Exp
      Returns the type of this expression. Never null.

    • getCategory

      public int getCategory()
      Description copied from interface: Exp
      Returns the Category of the expression.

    • accept

      public Exp accept(Validator validator)
      Description copied from interface: Exp
      Validates this expression. The validator acts in the role of 'visitor' (see Gang of Four 'visitor pattern'), and an expression in the role of 'visitee'.
      Parameters:
      validator - Validator contains validation context
      Returns:
      The validated expression; often but not always the same as this expression

    • accept

      public Calc accept(ExpCompiler compiler)
      Description copied from interface: Exp
      Converts this expression into an a tree of expressions which can be efficiently evaluated.
      Specified by:
      accept in interface Exp
      Overrides:
      accept in class ExpBase
      Returns:
      A compiled expression

    • accept

      public Object accept(MdxVisitor visitor)
      Description copied from interface: Exp
      Accepts a visitor to this Exp. The implementation should generally dispatches to the MdxVisitor.visit(mondrian.olap.Query) method appropriate to the type of expression.
      Parameters:
      visitor - Visitor

    • clone

      public ParameterExpr clone()
      Specified by:
      clone in interface Exp
      Specified by:
      clone in class ExpBase

    • unparse

      public void unparse(PrintWriter pw)
      Unparses the definition of this Parameter.

      The first usage of a parameter in a query becomes a call to the Parameter(paramName, description, defaultValue) function, and subsequent usages become calls to ParamRef(paramName)

      Specified by:
      unparse in interface Exp
      Overrides:
      unparse in class QueryPart
      Parameters:
      pw - PrintWriter

    • getChildren

      public Object[] getChildren()
      Overrides:
      getChildren in class QueryPart

    • equals

      public boolean equals(Object other)
      Returns whether this parameter is equal to another, based upon name, type and value
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • isModifiable

      public boolean isModifiable()
      Returns whether the parameter can be modified.
      Returns:
      whether parameter can be modified

    • getParameter

      public Parameter getParameter()
      Returns the parameter used by this expression.
      Returns:
      parameter used by this expression