content: /**
   * ﻿Copyright (C) 2007 - 2019 52°North Initiative for Geospatial Open Source
   * Software GmbH
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as published
   * by the Free Software Foundation.
   *
   * If the program is linked with libraries which are licensed under one of
   * the following licenses, the combination of the program with the linked
   * library is not considered a "derivative work" of the program:
   *
   *       • Apache License, version 2.0
   *       • Apache Software License, version 1.0
   *       • GNU Lesser General Public License, version 3
   *       • Mozilla Public License, versions 1.0, 1.1 and 2.0
   *       • Common Development and Distribution License (CDDL), version 1.0
   *
   * Therefore the distribution of the program linked with libraries licensed
   * under the aforementioned licenses, is permitted by the copyright holders
   * if the distribution is compliant with both the GNU General Public
   * License version 2 and the aforementioned licenses.
   *
   * As an exception to the terms of the GPL, you may copy, modify,
   * propagate, and distribute a work formed by combining 52°North WPS
   * GeoTools Modules with the Eclipse Libraries, or a work derivative of
   * such a combination, even if such copying, modification, propagation, or
   * distribution would otherwise violate the terms of the GPL. Nothing in
   * this exception exempts you from complying with the GPL in all respects
   * for all of the code used other than the Eclipse Libraries. You may
   * include this exception and its grant of permissions when you distribute
   * 52°North WPS GeoTools Modules. Inclusion of this notice with such a
   * distribution constitutes a grant of such permissions. If you do not wish
   * to grant these permissions, remove this paragraph from your
   * distribution. "52°North WPS GeoTools Modules" means the 52°North WPS
   * modules using GeoTools functionality - software licensed under version 2
   * or any later version of the GPL, or a work based on such software and
   * licensed under the GPL. "Eclipse Libraries" means Eclipse Modeling
   * Framework Project and XML Schema Definition software distributed by the
   * Eclipse Foundation and licensed under the Eclipse Public License Version
   * 1.0 ("EPL"), or a work based on such software and licensed under the EPL.
   *
   * This program 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.
   */
  package org.n52.wps.io.datahandler.parser;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import javax.xml.XMLConstants;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.xml.sax.Attributes;
  import org.xml.sax.SAXException;
  import org.xml.sax.helpers.DefaultHandler;
  
  /**
   * @author Theodor Foerster, ITC
   *
   */
  public class GML2Handler extends DefaultHandler {
  	
  	private Logger LOGGER = LoggerFactory.getLogger(GML2Handler.class);
  	// private static String SCHEMA = "http://www.opengis.net/wfs";
  	private String  schemaUrl;
  	private String nameSpaceURI;
  	private boolean rootVisited = false;
  	private Map<String, String> namespaces = new HashMap<String, String>();
  	
  	@Override
  	public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { 
  		super.startElement(uri, localName, qName, attributes);
  		if(rootVisited) {
  			return;
  		}
  		// check if root is a xml-beans element.
  		if(localName.equals("xml-fragment")) {
  			return;
  		}
  		rootVisited = true;
  		String schemaLocationAttr = attributes.getValue(XMLConstants.W3C_XML_SCHEMA_INSTANCE_NS_URI, "schemaLocation");
  		if(schemaLocationAttr == null) {
  			LOGGER.debug("schemaLocation attribute is not set correctly with namespace");
  			schemaLocationAttr = attributes.getValue("xsi:schemaLocation");
  			if(schemaLocationAttr == null){
  				schemaLocationAttr = attributes.getValue("schemaLocation");
  			}
  		}
  		String[] locationStrings = schemaLocationAttr.replace("  ", " ").split(" ");
  		if(locationStrings.length % 2 != 0) {
  			LOGGER.debug("schemaLocation does not reference locations correctly, odd number of whitespace separated addresses");
  			return;
  		}
  		for(int i = 0; i< locationStrings.length; i++) {
  			if(i % 2 == 0 && !locationStrings[i].equals("http://www.opengis.net/wfs") && !locationStrings[i].equals("http://www.opengis.net/gml") && !locationStrings[i].equals("")){
  				nameSpaceURI = locationStrings[i];
  				schemaUrl = locationStrings[i + 1];
  				return;
  			}
  				
  		}
  	}
  
  	public String getSchemaUrl(){
  		return schemaUrl;
  	}
  
  	@Override
  	public void startPrefixMapping(String prefix, String uri) throws SAXException {
  		super.startPrefixMapping(prefix, uri);
  		namespaces.put(prefix, uri);
  		
  	}
  
  	public String getNameSpaceURI() {
  		return nameSpaceURI;
  	}
  
  	
  	
  
  }
  