Package antlr.collections.impl

Class LList

java.lang.Object

antlr.collections.impl.LList

All Implemented Interfaces:

List, Stack

public class LList
extends Object
implements List, Stack

A Linked List Implementation (not thread-safe for simplicity) (adds to the tail) (has an enumeration)

Field Summary

Fields

Modifier and Type	Field	Description
protected LLCell	head
protected int	length
protected LLCell	tail

Constructor Summary

Constructors

Constructor	Description
LList()

Method Summary

Modifier and Type	Method	Description
void	add(Object o)	Add an object to the end of the list.
void	append(Object o)	Append an object to the end of the list.
protected Object	deleteHead()	Delete the object at the head of the list.
Object	elementAt(int i)	Get the ith element in the list.
Enumeration	elements()	Return an enumeration of the list elements
int	height()	How high is the stack?
boolean	includes(Object o)	Answers whether or not an object is contained in the list
protected void	insertHead(Object o)	Insert an object at the head of the list.
int	length()	Return the length of the list.
Object	pop()	Pop the top element of the stack off.
void	push(Object o)	Push an object onto the stack.
Object	top()

Methods inherited from class java.lang.Object

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

Field Detail

head

protected LLCell head

tail

protected LLCell tail

length

protected int length

Constructor Detail

LList

public LList()

Method Detail

add

public void add(Object o)

Add an object to the end of the list.

Specified by:

add in interface List

Parameters:

o - the object to add

append

public void append(Object o)

Append an object to the end of the list.

Specified by:

append in interface List

Parameters:

o - the object to append

deleteHead

protected Object deleteHead()
                     throws NoSuchElementException

Delete the object at the head of the list.

Returns:

the object found at the head of the list.

Throws:

NoSuchElementException - if the list is empty.

elementAt

public Object elementAt(int i)
                 throws NoSuchElementException

Get the ith element in the list.

Specified by:

elementAt in interface List

Parameters:

i - the index (from 0) of the requested element.

Returns:

the object at index i NoSuchElementException is thrown if i out of range

Throws:

NoSuchElementException

elements

public Enumeration elements()

Return an enumeration of the list elements

Specified by:

elements in interface List

height

public int height()

How high is the stack?

Specified by:

height in interface Stack

includes

public boolean includes(Object o)

Answers whether or not an object is contained in the list

Specified by:

includes in interface List

Parameters:

o - the object to test for inclusion.

Returns:

true if object is contained else false.

insertHead

protected void insertHead(Object o)

Insert an object at the head of the list.

Parameters:

o - the object to add

length

public int length()

Return the length of the list.

Specified by:

length in interface List

pop

public Object pop()
           throws NoSuchElementException

Pop the top element of the stack off.

Specified by:

pop in interface Stack

Returns:

the top of stack that was popped off.

Throws:

NoSuchElementException - if the stack is empty.

push

public void push(Object o)

Push an object onto the stack.

Specified by:

push in interface Stack

Parameters:

o - the object to push

top

public Object top()
           throws NoSuchElementException

Specified by:

top in interface Stack

Throws:

NoSuchElementException