Package weka.core.expressionlanguage.common

Class NoVariables

java.lang.Object

weka.core.expressionlanguage.common.NoVariables

All Implemented Interfaces:

Serializable, VariableDeclarations

public class NoVariables
extends Object
implements VariableDeclarations

A variable declarations that contains no variables

Version:

$Revision: 1000 $

Author:

Benjamin Weber ( benweber at student dot ethz dot ch )

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
NoVariables()

Method Summary

Modifier and Type	Method	Description
Node	getVariable(String name)	Tries to fetch the variable.
boolean	hasVariable(String name)	Whether the variable is declared.

Methods inherited from class java.lang.Object

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

Constructor Detail

NoVariables

public NoVariables()

Method Detail

hasVariable

public boolean hasVariable(String name)

Whether the variable is declared. Will always return false

Specified by:

hasVariable in interface VariableDeclarations

Parameters:

name - name of the variable

Returns:

whether the variable is declared. Always false.

getVariable

public Node getVariable(String name)

Tries to fetch the variable. Will always fail.

The same invariant of VariableDeclarations applies here too.

Specified by:

getVariable in interface VariableDeclarations

Parameters:

name - name of the variable

Returns:

nothing