slogo.expression

Class VariableFactory

java.lang.Object

slogo.expression.VariableFactory

public class VariableFactory
extends java.lang.Object

Clients can use this class to obtain a unique variable per identifier (avoiding a proliferation of objects)

Author:

Owen Astrachan

Method Summary

Modifier and Type	Method and Description
static VariableFactory	getInstance() There should only be one VariableFactory
static Variable	getVariable(IdentifierToken idToken) Determines the variable represented by the given id

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static VariableFactory getInstance()

There should only be one VariableFactory

Returns:

the variable factory

getVariable

public static Variable getVariable(IdentifierToken idToken)

Determines the variable represented by the given id

Parameters:

idToken - - an identifier token

Returns:

the variable that maps to this id token