org.apache.commons.collections.list

Class AbstractLinkedList.LinkedListIterator

protected static class AbstractLinkedList.LinkedListIterator extends Object implements ListIterator, OrderedIterator

A list iterator over the linked list.

Field Summary
protected AbstractLinkedList.Node	current The last node that was returned by {@link #next()} or {@link #previous()}.
protected int	expectedModCount The modification count that the list is expected to have.
protected AbstractLinkedList.Node	next The node that will be returned by {@link #next()}.
protected int	nextIndex The index of {@link #next}.
protected AbstractLinkedList	parent The parent list

Constructor Summary
protected	LinkedListIterator(AbstractLinkedList parent, int fromIndex) Create a ListIterator for a list.

Method Summary
void	add(Object obj)
protected void	checkModCount() Checks the modification count of the list is the value that this object expects.
protected AbstractLinkedList.Node	getLastNodeReturned() Gets the last node returned.
boolean	hasNext()
boolean	hasPrevious()
Object	next()
int	nextIndex()
Object	previous()
int	previousIndex()
void	remove()
void	set(Object obj)

Field Detail

current

protected AbstractLinkedList.Node current

The last node that was returned by {@link #next()} or {@link #previous()}. Set to null if {@link #next()} or {@link #previous()} haven't been called, or if the node has been removed with {@link #remove()} or a new node added with {@link #add(Object)}. Should be accessed through {@link #getLastNodeReturned()} to enforce this behaviour.

expectedModCount

protected int expectedModCount

The modification count that the list is expected to have. If the list doesn't have this count, then a {@link java.util.ConcurrentModificationException} may be thrown by the operations.

protected AbstractLinkedList.Node next

The node that will be returned by {@link #next()}. If this is equal to {@link AbstractLinkedList#header} then there are no more values to return.

nextIndex

protected int nextIndex

The index of {@link #next}.

parent

protected final AbstractLinkedList parent

The parent list

Constructor Detail

LinkedListIterator

protected LinkedListIterator(AbstractLinkedList parent, int fromIndex)

Create a ListIterator for a list.

Parameters: parent the parent list fromIndex the index to start at

Method Detail

add

public void add(Object obj)

checkModCount

protected void checkModCount()

Checks the modification count of the list is the value that this object expects.

Throws: ConcurrentModificationException If the list's modification count isn't the value that was expected.

getLastNodeReturned

protected AbstractLinkedList.Node getLastNodeReturned()

Gets the last node returned.

Throws: IllegalStateException If {@link #next()} or {@link #previous()} haven't been called, or if the node has been removed with {@link #remove()} or a new node added with {@link #add(Object)}.