it.unimi.dsi.fastutil
Class AbstractPriorityQueue

java.lang.Object
  it.unimi.dsi.fastutil.AbstractPriorityQueue

All Implemented Interfaces:

PriorityQueue

Direct Known Subclasses:

AbstractBytePriorityQueue, AbstractCharPriorityQueue, AbstractDoublePriorityQueue, AbstractFloatPriorityQueue, AbstractIntPriorityQueue, AbstractLongPriorityQueue, AbstractShortPriorityQueue, ObjectArrayPriorityQueue, ObjectHeapPriorityQueue

public abstract class AbstractPriorityQueue

extends Object

implements PriorityQueue

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

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

Constructor Summary

AbstractPriorityQueue()

Method Summary

void	changed() Notifies the queue that the first element has changed (optional operation).
boolean	isEmpty() Checks whether the queue is empty.
Object	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

last

public Object 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

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

Returns:

true if the queue is empty.