SearchWikipediaHandler.java

/*
 * @copyright 2010 Evan Leybourn
 * @license GNU General Public License
 * 
 * This file is part of Book Catalogue.
 *
 * Book Catalogue is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Book Catalogue is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Book Catalogue.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.eleybourn.bookcatalogue;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/* 
 * An HTML handler for the Wikipedia search results return 
 * 
 */
public class SearchWikipediaHandler extends DefaultHandler {
	//private StringBuilder builder;
	public String id = "";
	public int count = 0;
	public String[] link = {"", ""};
	private boolean entry = false;
	
	public static String UL = "ul";
	public static String LINK = "A";
	
	public String[] getLinks(){
		return link;
	}
	
	public int getCount(){
		return count;
	}
	
	@Override
	public void endElement(String uri, String localName, String name) throws SAXException {
		super.endElement(uri, localName, name);
		// don't do anything if we are in the table of contents
		if (localName.equalsIgnoreCase(UL) && entry == true){
			entry = false;
		}
	}
	
	@Override
	public void startElement(String uri, String localName, String name, Attributes attributes) throws SAXException {
		super.startElement(uri, localName, name, attributes);
		if (localName.equalsIgnoreCase(UL)){
			String className = attributes.getValue("class");
			if (className != null && className.equals("mw-search-results")) {
				entry = true;
			}
		}
		if (entry == true) {
			if (localName.equalsIgnoreCase(LINK)){
				String href = attributes.getValue("href");
				if (href.contains("/wiki") == false) {
					//only use /wiki/... urls
					return;
				}
				// we only want the first 2 links
				if (count < 2) {
					link[count] = href;
					count++;
				} else {
					entry = false;
				}
			}
		}
	}
}