oracle.spatial.network.lod

Class BinaryHeap<E extends java.lang.Comparable>

java.lang.Object

oracle.spatial.network.lod.BinaryHeap<E>

All Implemented Interfaces:

PriorityQueue<E>

public class BinaryHeap<E extends java.lang.Comparable>
extends java.lang.Object
implements PriorityQueue<E>

a binary Min. heap priority queue implementation Note the value has to implement the Comparable interface (int compareTo(Object obj) )

Constructor Summary

Constructors

Constructor and Description
BinaryHeap()
BinaryHeap(int initialCapacity)
BinaryHeap(int initialCapacity, oracle.spatial.network.lod.BinaryHeap.IndexKeeper indexKeeper)

Method Summary

Modifier and Type	Method and Description
void	clear() Empties the queue.
E	deleteMin() Deletes the minimum element in the queue.
E	findMin() Finds the minimum element in the queue.
E	getElementAtIndex(int index)
void	insert(E element) Inserts an element into the queue.
boolean	isEmpty() Determines whether the queue is empty or not.
int	size() Returns the size of the queue.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

BinaryHeap

public BinaryHeap()

BinaryHeap

public BinaryHeap(int initialCapacity)

BinaryHeap

public BinaryHeap(int initialCapacity,
                  oracle.spatial.network.lod.BinaryHeap.IndexKeeper indexKeeper)

Method Detail

insert

public void insert(E element)

Description copied from interface: PriorityQueue

Inserts an element into the queue.

Specified by:

insert in interface PriorityQueue<E extends java.lang.Comparable>

deleteMin

public E deleteMin()

Description copied from interface: PriorityQueue

Deletes the minimum element in the queue.

Specified by:

deleteMin in interface PriorityQueue<E extends java.lang.Comparable>

Returns:

the minimum element in the queue. If the queue is empty, return null.

isEmpty

public boolean isEmpty()

Description copied from interface: PriorityQueue

Determines whether the queue is empty or not.

Specified by:

isEmpty in interface PriorityQueue<E extends java.lang.Comparable>

Returns:

getElementAtIndex

public E getElementAtIndex(int index)

clear

public void clear()

Description copied from interface: PriorityQueue

Empties the queue.

Specified by:

clear in interface PriorityQueue<E extends java.lang.Comparable>

size

public int size()

Description copied from interface: PriorityQueue

Returns the size of the queue.

Specified by:

size in interface PriorityQueue<E extends java.lang.Comparable>

Returns:

findMin

public E findMin()

Description copied from interface: PriorityQueue

Finds the minimum element in the queue. This method is non-destructive peeking. The queue is left untouched.

Specified by:

findMin in interface PriorityQueue<E extends java.lang.Comparable>

Returns:

the minimum element in the queue. If the queue is empty, return null.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object