mondrian.mdx
Class LevelExpr

java.lang.Object
  mondrian.olap.QueryPart
      mondrian.olap.ExpBase
          mondrian.mdx.LevelExpr

All Implemented Interfaces:

Exp, Walkable

public class LevelExpr
extends ExpBase
implements Exp

Usage of a Level as an MDX expression.

Since:

Sep 26, 2005

Author:

jhyde

Constructor Summary

LevelExpr(Level level)
Creates a level expression.

Method Summary

Calc	accept(ExpCompiler compiler) Converts this expression into an a tree of expressions which can be efficiently evaluated.
Object	accept(MdxVisitor visitor) Accepts a visitor to this Exp.
Exp	accept(Validator validator) Validates this expression.
LevelExpr	clone()
int	getCategory() Returns the Category of the expression.
Level	getLevel() Returns the level.
Type	getType() Returns the type of this expression.
String	toString()

Methods inherited from class mondrian.olap.ExpBase

cloneArray, getTypes, unparseList

Methods inherited from class mondrian.olap.QueryPart

getChildren, unparse

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface mondrian.olap.Exp

unparse

Constructor Detail

LevelExpr

public LevelExpr(Level level)

Creates a level expression.

Pre-condition:

level != null

Parameters:

level - Level

Method Detail

getLevel

public Level getLevel()

Returns the level.

Post-condition:

return != null

toString

public String toString()

Overrides:

toString in class Object

getType

public Type getType()

Description copied from interface: Exp

Returns the type of this expression. Never null.

Specified by:

getType in interface Exp

clone

public LevelExpr clone()

Specified by:

clone in interface Exp

Specified by:

clone in class ExpBase

getCategory

public int getCategory()

Description copied from interface: Exp

Returns the Category of the expression.

Specified by:

getCategory in interface Exp

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'.

Specified by:

accept in interface Exp

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.

Specified by:

accept in interface Exp

Parameters:

visitor - Visitor