nayuki.huffmancoding.InternalNode Maven / Gradle / Ivy

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/**
 *
 *  Copyright © 2013 Nayuki Minase
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy of
 *  this software and associated documentation files (the "Software"), to deal in
 *  the Software without restriction, including without limitation the rights to
 *  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 *  the Software, and to permit persons to whom the Software is furnished to do so,
 *  subject to the following conditions:
 *
 *  * The above copyright notice and this permission notice shall be included in
 *    all copies or substantial portions of the Software.
 *
 *  * The Software is provided "as is", without warranty of any kind, express or
 *    implied, including but not limited to the warranties of merchantability,
 *    fitness for a particular purpose and noninfringement. In no event shall the
 *    authors or copyright holders be liable for any claim, damages or other
 *    liability, whether in an action of contract, tort or otherwise, arising from,
 *    out of or in connection with the Software or the use or other dealings in the
 *    Software.
 */

package nayuki.huffmancoding;


/**
 * An internal node in a code tree. It has two nodes as children. Immutable.
 */
public final class InternalNode extends Node {
	
	public final Node leftChild;  // Not null
	
	public final Node rightChild;  // Not null
	
	
	
	public InternalNode(Node leftChild, Node rightChild) {
		if (leftChild == null || rightChild == null)
			throw new NullPointerException("Argument is null");
		this.leftChild = leftChild;
		this.rightChild = rightChild;
	}
	
}