Class lrs.EmptyNode

class EmptyNode
extends lrs.ANode
Represents the empty state of a mutable list LRStruct. Uses the Singleton pattern.

Author:
Dung X. Nguyen Copyright 2001 - All rights reserved.

Variable Index

o Singleton
Singleton Pattern

Constructor Index

o EmptyNode ()

Method Index

o execute (IAlgo, Object, LRStruct)
Calls the IAlgo visitor's empty case
o getFirst (LRStruct)
Throws java
o getRest (LRStruct)
Throws java
o insertFront (Object, LRStruct)
The owner becomes non-empty and has dat as its first element
o removeFront (LRStruct)
Throws java
o setFirst (Object, LRStruct)
Throws java
o setRest (LRStruct, LRStruct)
Throws java

Variables

o Singleton 
static final EmptyNode Singleton = new EmptyNode()
Singleton Pattern.

Constructors

o EmptyNode 
private  EmptyNode()

Methods

o getRest 
LRStruct getRest(LRStruct owner)
Throws java.util.NoSuchElementException.

o getFirst 
Object getFirst(LRStruct owner)
Throws java.util.NoSuchElementException.

o setRest 
LRStruct setRest(LRStruct tail, LRStruct owner)
Throws java.util.NoSuchElementException.

o setFirst 
LRStruct setFirst(Object dat, LRStruct owner)
Throws java.util.NoSuchElementException.

o insertFront 
LRStruct insertFront(Object dat, LRStruct owner)
The owner becomes non-empty and has dat as its first element.

o removeFront 
Object removeFront(LRStruct owner)
Throws java.util.NoSuchElementException.

o execute 
Object execute(IAlgo algo, Object inp, LRStruct owner)
Calls the IAlgo visitor's empty case.