qilin.util.queue

Class QueueReader<E>

java.lang.Object

qilin.util.queue.QueueReader<E>

All Implemented Interfaces:

Iterator<E>

public class QueueReader<E>
extends Object
implements Iterator<E>

A queue of Object's. One can add objects to the queue, and they are later read by a QueueReader. One can create arbitrary numbers of QueueReader's for a queue, and each one receives all the Object's that are added. Only objects that have not been read by all the QueueReader's are kept. A QueueReader only receives the Object's added to the queue after the QueueReader was created.

Author:

Ondrej Lhotak

Field Summary

Fields

Modifier and Type	Field and Description
protected int	index
protected E[]	q

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	QueueReader(E[] q, int index)

Method Summary

Modifier and Type	Method and Description
QueueReader<E>	clone()
boolean	hasNext() Returns true iff there is currently another object in the queue.
E	next() Returns (and removes) the next object in the queue, or null if there are none.
void	remove()
void	remove(Collection<E> toRemove) Removes elements from the underlying queue.
void	remove(E o) Removes an element from the underlying queue.
protected boolean	skip(Object ret)
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Field Detail

q

protected E[] q

index

protected int index

Constructor Detail

QueueReader

protected QueueReader(E[] q,
                      int index)

Method Detail

next

public E next()

Returns (and removes) the next object in the queue, or null if there are none.

Specified by:

next in interface Iterator<E>

skip

protected boolean skip(Object ret)

hasNext

public boolean hasNext()

Returns true iff there is currently another object in the queue.

Specified by:

hasNext in interface Iterator<E>

remove

public void remove(E o)

Removes an element from the underlying queue. This operation can only delete elements that have not yet been consumed by this reader.

Parameters:

o - The element to remove

remove

public void remove(Collection<E> toRemove)

Removes elements from the underlying queue. This operation can only delete elements that have not yet been consumed by this reader.

Parameters:

toRemove - The elements to remove

remove

public void remove()

Specified by:

remove in interface Iterator<E>

clone

public QueueReader<E> clone()

Overrides:

clone in class Object

toString

public String toString()

Overrides:

toString in class Object