import FrontCalculatorParserNodeAbstract from "./front.calculator.parser.node.abstract";

/**
 * A parent node is a container for a (sorted) array of nodes.
 *
 */
export default class FrontCalculatorParserNodeContainer extends FrontCalculatorParserNodeAbstract {
	constructor(childNodes) {
		super();

		/**
		 *
		 * @type {FrontCalculatorParserNodeAbstract[]}
		 */
		this.childNodes = null;

		this.setChildNodes(childNodes);
	}

	/**
	 * Setter for the child nodes.
	 * Notice: The number of child nodes can be 0.
	 * @param childNodes
	 */
	setChildNodes(childNodes) {
		childNodes.forEach(function (childNode) {
			if (!(childNode instanceof FrontCalculatorParserNodeAbstract)) {
				throw 'Expected AbstractNode, but got ' + childNode.constructor.name;
			}
		});

		this.childNodes = childNodes;
	}

	/**
	 * Returns the number of child nodes in this array node.
	 * Does not count the child nodes of the child nodes.
	 *
	 * @returns {number}
	 */
	size() {
		try {
			return this.childNodes.length;
		} catch (e) {
			return 0;
		}
	}

	/**
	 * Returns true if the array node does not have any
	 * child nodes. This might sound strange but is possible.
	 *
	 * @returns {boolean}
	 */
	isEmpty() {
		return !this.size();
	}

}

<title>XML Sitemap</title><style type="text/css">
					body {
						font-family:"Lucida Grande","Lucida Sans Unicode",Tahoma,Verdana;
						font-size:13px;
					}
					
					#intro {
						background-color:#cfebf7;
						border:1px #2580B2 solid;
						padding:5px 13px 5px 13px;
						margin:10px;
					}
					
					#intro p {
						line-height:16.8667px;
					}
					#intro strong {
						font-weight:normal;
					}
					
					td {
						font-size:11px;
					}
					
					th {
						text-align:left;
						padding-right:30px;
						font-size:11px;
					}
					
					tr.high {
						background-color:whitesmoke;
					}
					
					#footer {
						padding:2px;
						margin-top:10px;
						font-size:8pt;
						color:gray;
					}
					
					#footer a {
						color:gray;
					}
					
					a {
						color:black;
					}
				</style><h1>XML Sitemap Index</h1><div id="intro"><p>
                This XML sitemap is used by search engines which follow the <a rel="external nofollow" href="https://sitemaps.org">XML sitemap standard</a>. This file contains links to sub-sitemaps, follow them to see the actual sitemap content.
            </p><p>
                This file was dynamically generated using the <a rel="external nofollow" href="https://wordpress.org/">WordPress</a> content management system and <strong><a rel="external nofollow" href="https://auctollo.com/products/google-xml-sitemap-generator/" title="XML Sitemap Generator for Google">XML Sitemap Generator for Google</a></strong> by <a rel="external nofollow" href="https://auctollo.com/">Auctollo</a>.
            </p></div><div id="content"><table><tr style="border-bottom:1px black solid"><th>URL of sub-sitemap</th><th>Last modified (GMT)</th></tr><tr><td><a href="https://iiscim.com/sitemap-misc.html">https://iiscim.com/sitemap-misc.html</a></td><td>2023-03-13T17:33:33+00:00</td></tr><tr class="high"><td><a href="https://iiscim.com/page-sitemap.html">https://iiscim.com/page-sitemap.html</a></td><td>2023-03-13T17:33:33+00:00</td></tr></table></div><div id="footer"><p>
						Dynamically generated with <a rel="external nofollow" href="https://auctollo.com/products/google-xml-sitemap-generator/" title="XML Sitemap Generator for Google">XML Sitemap Generator for Google</a> by <a rel="external nofollow" href="https://auctollo.com/">Auctollo</a>. This XSLT template is released under the GPL and free to use.
            		</p><p>
	                    If you have problems with your sitemap please visit the <a rel="external nofollow" href="https://auctollo.com/products/google-xml-sitemap-generator/help/" title="Frequently Asked Questions">FAQ</a> or the <a rel="external nofollow" href="https://wordpress.org/support/plugin/google-sitemap-generator">support forum</a>.
            		</p></div>