Application: gvSIG desktop

package org.gvsig.remoteClient.gml.schemas;

import java.awt.geom.Rectangle2D;

import java.io.File;

import java.io.IOException;

import java.net.ConnectException;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.UnknownHostException;

import java.util.Hashtable;

import java.util.StringTokenizer;

import org.gvsig.remoteClient.gml.GMLException;

import org.gvsig.remoteClient.gml.GMLTags;

import org.gvsig.remoteClient.gml.factories.XMLSchemasFactory;

import org.gvsig.remoteClient.utils.Utilities;

import org.kxml2.io.KXmlParser;

import org.xmlpull.v1.XmlPullParserException;

/* gvSIG. Sistema de Informaci�n Geogr�fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program 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 2

 * of the License, or (at your option) any later version.

 *

 * 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib��ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

 *

 * $Id: XMLSchemasManager.java 9531 2007-01-03 17:07:37Z  $

 * $Log$

 * Revision 1.2  2006-08-30 10:47:36  jorpiell

 * Añadido un File.separator en lugar de unas barras que impedia que funcioanra en linux

 *

 * Revision 1.1  2006/08/10 12:00:49  jorpiell

 * Primer commit del driver de Gml

 *

 *

 */

/**

 * This class represents a GML file header. It has 

 * methods to parses the GML file header and retrieve

 * the namespaces and the attributes. If there is an schema

 * on the GML file, it has to manage it. It has to retrieve

 * the GML file version

 * 

 * @author Jorge Piera Llodr� (piera_jor@gva.es)

 */

public class XMLSchemasManager {

        private String version = null;

        private File file = null;

        private String targetNameSpace = null;

        public XMLSchemasManager(File file) {

                super();

                this.file = file;

        }

        /**

         * It parses the GML header and returns the attributes

         * @param parser

         * Reader for the GML file 

         * @throws IOException 

         * @throws XmlPullParserException 

         * @throws GMLException 

         */

        public void parse(XMLSchemaParser parser) throws XmlPullParserException, IOException, GMLException{

                parser.nextTag();

                for (int i=0 ; i<parser.getAttributeCount() ; i++){

                        String attName = parser.getAttributeName(i);

                        String attValue = parser.getAttributeValue(i);

                        if (attName.compareTo(GMLTags.VERSION)==0){

                                version = attValue;

                                break;

                        }

                        if (attName.compareTo(GMLTags.XML_TARGET_NAMESPACE)==0){

                                targetNameSpace = attValue;

                                break;

                        }

                        String[] ns = attName.split(":");

                        if ((ns.length>1) && (ns[0].compareTo(GMLTags.XML_NAMESPACE)==0)){

                                parseNameSpace(ns[1],attValue);                                

                        }

                        if ((ns.length>1) && (ns[1].compareTo(GMLTags.XML_SCHEMA_LOCATION)==0)){

                                parseSchemaLocation(ns[0],attValue);

                        }                        

                }        

        }

        /**

         * It parses an XML namespace tag

         * @param sNameSPace

         */

        private void parseNameSpace(String xmlnsName,String xmlnsValue){

                XMLSchemasFactory.addType(xmlnsName,xmlnsValue);                

        }

        /**

         * Parses the schema location attribute

         * @param schemas

         * XML attribute than contain the schema location info

         * @throws GMLException 

         */

        private void parseSchemaLocation(String namespace,String schemas) throws GMLException{

                StringTokenizer tokenizer = new StringTokenizer(schemas, " \t");

        while (tokenizer.hasMoreTokens()){

            String parent = tokenizer.nextToken();

            if (!tokenizer.hasMoreTokens()){

                throw new GMLException(GMLException.EXC_NO_SCHEMA);

            }

            String schema = tokenizer.nextToken();

            String name = XMLSchemasFactory.addSchemaLocation(namespace,parent,schema);

            parseSchema(schema,name);             

        }

        }        

        /**

         * It Downloads the schemas and parses them

         * @param urlString

         * Schema to parse

         * @return

         */

        private void parseSchema(String urlString,String nameSpace){

                if (urlString.indexOf("http://") != 0){

                        File f = new File(urlString);

                        if (!(f.isAbsolute())){

                                urlString = file.getParentFile().getAbsolutePath() + File.separator +  urlString;

                                f = new File(urlString);

                        }

                        new XMLSchemaParser().parse(f,nameSpace);

                }else{

                        URL url;

                        try {

                                url = new URL(urlString);

                                File f = Utilities.downloadFile(url,"gml_schmema.xsd", null);

                                if (f == null){

                                        return;

                                }else{

                                        new XMLSchemaParser().parse(f,nameSpace);

                                }  

                        }catch (MalformedURLException e1) {

                                        // TODO Auto-generated catch block

                                        e1.printStackTrace();                                

                        } catch (ConnectException e) {

                                // TODO Auto-generated catch block

                                e.printStackTrace();

                        } catch (UnknownHostException e) {

                                // TODO Auto-generated catch block

                                e.printStackTrace();

                        } catch (IOException e) {

                                // TODO Auto-generated catch block

                                e.printStackTrace();

                        }            

                }                

        }

        /**

         * @return Returns the targetNameSpace.

         */

        public String getTargetNameSpace() {

                return targetNameSpace;

        }

        /**

         * @return Returns the version.

         * TODO: Manage the different versions

         */

        public String getVersion() {

                if (version == null){

                        return "2.1.2";

                }

                return version;

        }

}