weka.core.expressionlanguage.common

## Class NoVariables

- java.lang.Object
- - weka.core.expressionlanguage.common.NoVariables

- All Implemented Interfaces:
    java.io.Serializable, VariableDeclarations

      public class NoVariables
      extends java.lang.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 and Description
    `NoVariables()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `Node` | `getVariable(java.lang.String name)` Tries to fetch the variable.
    `boolean` | `hasVariable(java.lang.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(java.lang.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(java.lang.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