org.olap4j.mdx

Class LevelNode

java.lang.Object

org.olap4j.mdx.LevelNode

All Implemented Interfaces:

ParseTreeNode

public class LevelNode
extends Object
implements ParseTreeNode

Usage of a Level as an expression in an MDX parse tree.

Since:

Jun 4, 2007

Author:

jhyde

Constructor Summary

Constructors

Constructor and Description
LevelNode(ParseRegion region, Level level) Creates a LevelNode.

Method Summary

Modifier and Type	Method and Description
<T> T	accept(ParseTreeVisitor<T> visitor) Accepts a visitor to this MDX parse tree node.
LevelNode	deepCopy() Creates a deep copy of this ParseTreeNode object.
Level	getLevel() Returns the Level used in this expression.
ParseRegion	getRegion() Returns the region of the source code which this node was created from, if it was created by parsing.
Type	getType() Returns the type of this expression.
String	toString()
void	unparse(ParseTreeWriter writer) Converts this node into MDX text.

Methods inherited from class java.lang.Object

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

Constructor Detail

LevelNode

public LevelNode(ParseRegion region,
                 Level level)

Creates a LevelNode.

Parameters:

region - Region of source code

level - Level which is used in the expression

Method Detail

getRegion

public ParseRegion getRegion()

Description copied from interface: ParseTreeNode

Returns the region of the source code which this node was created from, if it was created by parsing.

A non-leaf node's region will encompass the regions of all of its children. For example, a the region of a function call node Crossjoin([Gender], {[Store].[USA]}) stretches from the first character of the function name to the closing parenthesis.

Region may be null, if the node was created programmatically, not from a piece of source code.

Specified by:

getRegion in interface ParseTreeNode

Returns:

Region of the source code this node was created from, if it was created by parsing

getLevel

public Level getLevel()

Returns the Level used in this expression.

Returns:

level used in this expression

accept

public <T> T accept(ParseTreeVisitor<T> visitor)

Description copied from interface: ParseTreeNode

Accepts a visitor to this MDX parse tree node.

The implementation should generally dispatches to the ParseTreeVisitor.visit(org.olap4j.mdx.SelectNode) method appropriate to the type of expression.

Specified by:

accept in interface ParseTreeNode

Parameters:

visitor - Visitor

Returns:

T, the specific return type of the visitor

getType

public Type getType()

Description copied from interface: ParseTreeNode

Returns the type of this expression.

Returns null if this node is not an expression, for instance a SELECT node.

Specified by:

getType in interface ParseTreeNode

Returns:

type of this expression

unparse

public void unparse(ParseTreeWriter writer)

Description copied from interface: ParseTreeNode

Converts this node into MDX text.

Specified by:

unparse in interface ParseTreeNode

Parameters:

writer - Parse tree writer

toString

public String toString()

Overrides:

toString in class Object

deepCopy

public LevelNode deepCopy()

Description copied from interface: ParseTreeNode

Creates a deep copy of this ParseTreeNode object.

Note: implementing classes can return the concrete type instead of ParseTreeNode (using Java 1.5 covariant return types)

Specified by:

deepCopy in interface ParseTreeNode

Returns:

The deep copy of this ParseTreeNode