In PriorityQueue.java, write code for the following new functions: 1. public boolean add( PriorityQueueNode x ) This function adds a new node x to the priority queue. The node is added to the heap by comparison of the rating attribute. It involves the “percolate up" process and returns true when finished.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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In PriorityQueue.java, write code for the following new functions:
1. public boolean add( PriorityQueueNode x )
This function adds a new node x to the priority queue. The node is added to
the heap by comparison of the rating attribute. It involves the “percolate
up" process and returns true when finished.
2. public PriorityQueueNode remove( )
This function removes the minimum element of the priority queue and returns
it. It involves a call to percolateDown ( int hole ).
3. private void percolateDown ( int hole )
This function takes the position of the next available hole in the priority queue
and uses it to bubble the elements through the heap until the heap property is
restored.
Transcribed Image Text:In PriorityQueue.java, write code for the following new functions: 1. public boolean add( PriorityQueueNode x ) This function adds a new node x to the priority queue. The node is added to the heap by comparison of the rating attribute. It involves the “percolate up" process and returns true when finished. 2. public PriorityQueueNode remove( ) This function removes the minimum element of the priority queue and returns it. It involves a call to percolateDown ( int hole ). 3. private void percolateDown ( int hole ) This function takes the position of the next available hole in the priority queue and uses it to bubble the elements through the heap until the heap property is restored.
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