slogo.expression

Class SubroutineFactory

java.lang.Object

slogo.expression.SubroutineFactory

public class SubroutineFactory
extends java.lang.Object

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

Field Summary

Fields

Modifier and Type	Field and Description
private static SubroutineFactory	ourInstance
private static java.util.Map<java.lang.String,Subroutine>	subnameToSub

Constructor Summary

Constructors

Modifier	Constructor and Description
private	SubroutineFactory() VariableFactory Constructor

Method Summary

Modifier and Type	Method and Description
static SubroutineFactory	getInstance() There should only be one SubroutineFactory
static Subroutine	getSubroutine(IdentifierToken idToken) Determines the variable represented by the given id
static void	makeSubroutine(IdentifierToken idToken)

Methods inherited from class java.lang.Object

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

Field Detail

ourInstance

private static SubroutineFactory ourInstance

subnameToSub

private static java.util.Map<java.lang.String,Subroutine> subnameToSub

Constructor Detail

SubroutineFactory

private SubroutineFactory()

VariableFactory Constructor

Method Detail

getInstance

public static SubroutineFactory getInstance()

There should only be one SubroutineFactory

Returns:

the variable factory

getSubroutine

public static Subroutine getSubroutine(IdentifierToken idToken)

Determines the variable represented by the given id

Parameters:

idToken - - an identifier token

Returns:

the variable that maps to this id token

makeSubroutine

public static void makeSubroutine(IdentifierToken idToken)