it.unimi.dsi.fastutil

Class AbstractPriorityQueue<K>

java.lang.Object

it.unimi.dsi.fastutil.AbstractPriorityQueue<K>

All Implemented Interfaces:

PriorityQueue<K>

Direct Known Subclasses:

AbstractBytePriorityQueue, AbstractCharPriorityQueue, AbstractDoublePriorityQueue, AbstractFloatPriorityQueue, AbstractIntPriorityQueue, AbstractLongPriorityQueue, AbstractShortPriorityQueue, ObjectArrayFIFOQueue, ObjectArrayPriorityQueue, ObjectHeapPriorityQueue, PriorityQueues.EmptyPriorityQueue

public abstract class AbstractPriorityQueue<K>
extends Object
implements PriorityQueue<K>

An abstract class providing basic methods for implementing the PriorityQueue interface.

This class defines changed() and last() as throwing an UnsupportedOperationException.

Constructor Summary

Constructors

Constructor and Description
AbstractPriorityQueue()

Method Summary

Modifier and Type	Method and Description
void	changed() Notifies the queue that the first element has changed (optional operation).
boolean	isEmpty() Checks whether the queue is empty.
K	last() Returns the last element of the queue, that is, the element the would be dequeued last (optional operation).

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unimi.dsi.fastutil.PriorityQueue

clear, comparator, dequeue, enqueue, first, size

Constructor Detail

AbstractPriorityQueue

public AbstractPriorityQueue()

Method Detail

changed

public void changed()

Description copied from interface: PriorityQueue

Notifies the queue that the first element has changed (optional operation).

Specified by:

changed in interface PriorityQueue<K>

last

public K last()

Description copied from interface: PriorityQueue

Returns the last element of the queue, that is, the element the would be dequeued last (optional operation).

Specified by:

last in interface PriorityQueue<K>

Returns:

the last element.

isEmpty

public boolean isEmpty()

Description copied from interface: PriorityQueue

Checks whether the queue is empty.

Specified by:

isEmpty in interface PriorityQueue<K>

Returns:

true if the queue is empty.