/*
 *   ________________________________________________________________________________________
 *   
 *   Y O O R E E K A
 *   A library for data mining, machine learning, soft computing, and mathematical analysis
 *   ________________________________________________________________________________________ 
 *    
 *   The Yooreeka project started with the code of the book "Algorithms of the Intelligent Web " 
 *   (Manning 2009). Although the term "Web" prevailed in the title, in essence, the algorithms 
 *   are valuable in any software application.
 *  
 *   Copyright (c) 2007-2009 Haralambos Marmanis & Dmitry Babenko
 *   Copyright (c) 2009-${year} Marmanis Group LLC and individual contributors as indicated by the @author tags.  
 * 
 *   Certain library functions depend on other Open Source software libraries, which are covered 
 *   by different license agreements. See the NOTICE file distributed with this work for additional 
 *   information regarding copyright ownership and licensing.
 * 
 *   Marmanis Group LLC licenses this file to You under the Apache License, Version 2.0 (the "License"); 
 *   you may not use this file except in compliance with the License.  
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software distributed under 
 *   the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, 
 *   either express or implied. See the License for the specific language governing permissions and
 *   limitations under the License.
 *   
 */
package org.yooreeka.util.parsing.html;

import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.traversal.NodeFilter;

/**
 * Filter for nodes that are elements with specified name and attribute.
 */
class ElementNodeFilter implements NodeFilter {
	private String elementName = null;
	private String attributeName = null;

	public ElementNodeFilter(String elementName, String attributeName) {
		this.elementName = elementName;
		this.attributeName = attributeName;
	}

	public short acceptNode(Node n) {
		short result = FILTER_SKIP;
		if (Node.ELEMENT_NODE == n.getNodeType()) {
			Element e = (Element) n;
			if (e.getNodeName().equalsIgnoreCase(elementName)) {
				if (e.getAttributeNode(attributeName) != null) {
					result = FILTER_ACCEPT;
				}
			}
		}
		return result;
	}
}
