Package it.unimi.dsi.fastutil

Class PriorityQueues

java.lang.Object

it.unimi.dsi.fastutil.PriorityQueues

public class PriorityQueues
extends Object

A class providing static methods and objects that do useful things with priority queues.

See Also:

• PriorityQueue

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PriorityQueues.EmptyPriorityQueue	An immutable class representing the empty priority queue.
static class	PriorityQueues.SynchronizedPriorityQueue<K>	A synchronized wrapper class for priority queues.

Field Summary

Fields

Modifier and Type	Field	Description
static final PriorityQueues.EmptyPriorityQueue	EMPTY_QUEUE	An empty indirect priority queue (immutable).

Method Summary

Modifier and Type	Method	Description
static <K> PriorityQueue<K>	emptyQueue()	Returns an empty queue (immutable).
static <K> PriorityQueue<K>	synchronize(PriorityQueue<K> q)	Returns a synchronized priority queue backed by the specified priority queue.
static <K> PriorityQueue<K>	synchronize(PriorityQueue<K> q, Object sync)	Returns a synchronized priority queue backed by the specified priority queue, using an assigned object to synchronize.

Methods inherited from class java.lang.Object

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

Field Details

EMPTY_QUEUE

public static final PriorityQueues.EmptyPriorityQueue EMPTY_QUEUE

An empty indirect priority queue (immutable).

Method Details

emptyQueue

public static <K> PriorityQueue<K> emptyQueue()

Returns an empty queue (immutable). It is serializable and cloneable.

This method provides a typesafe access to EMPTY_QUEUE.

Type Parameters:

K - the class of the objects in the queue.

Returns:

an empty queue (immutable).

synchronize

public static <K> PriorityQueue<K> synchronize(PriorityQueue<K> q)

Returns a synchronized priority queue backed by the specified priority queue.

Type Parameters:

K - the class of the objects in the queue.

Parameters:

q - the priority queue to be wrapped in a synchronized priority queue.

Returns:

a synchronized view of the specified priority queue.

synchronize

public static <K> PriorityQueue<K> synchronize(PriorityQueue<K> q,
 Object sync)

Returns a synchronized priority queue backed by the specified priority queue, using an assigned object to synchronize.

Type Parameters:

K - the class of the objects in the queue.

Parameters:

q - the priority queue to be wrapped in a synchronized priority queue.

sync - an object that will be used to synchronize the access to the priority queue.

Returns:

a synchronized view of the specified priority queue.