Application: gvSIG desktop

package org.gvsig.gpe.gml.bindings;

import java.io.IOException;

import java.util.Hashtable;

import org.gvsig.gpe.gml.GMLTags;

import org.gvsig.gpe.gml.GPEGmlParser;

import org.gvsig.gpe.gml.bindings.geometries.BoundedByTypeBinding;

import org.gvsig.gpe.gml.bindings.geometries.GeometryBinding;

import org.gvsig.gpe.gml.utils.CompareUtils;

import org.gvsig.gpe.gml.utils.GMLGeometries;

import org.gvsig.gpe.gml.utils.GMLUtilsParser;

import org.gvsig.gpe.schema.exceptions.TypeNotFoundException;

import org.gvsig.gpe.schema.som.IXSElementDeclaration;

import org.xmlpull.v1.XmlPullParser;

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: FeatureTypeBinding.java 12071 2007-06-07 14:53:59Z jorpiell $

 * $Log$

 * Revision 1.6  2007-06-07 14:53:30  jorpiell

 * Add the schema support

 *

 * Revision 1.5  2007/05/18 10:41:01  csanchez

 * Actualizaci?n libGPE-GML eliminaci?n de clases inecesarias

 *

 * Revision 1.4  2007/05/15 12:10:01  jorpiell

 * The bbox is linked to the feature

 *

 * Revision 1.3  2007/05/15 09:43:48  jorpiell

 * The namespace is deleted from the feature name

 *

 * Revision 1.2  2007/05/15 09:35:09  jorpiell

 * the tag names cant have blanc spaces

 *

 * Revision 1.1  2007/05/14 09:30:30  jorpiell

 * Add the FeatureMember tag

 *

 *

 */

/**

 * This class parses the gml objects that has a 

 * gml:_Feature object type. The structure of the

 * properties that this type has is variable and depends

 * on its schema. Example:

 * <p>

 * <pre>

 * <code>

 * <cit:cities>

 * <cit:the_geom>

 * <gml:Point srsName='0'>

 * <gml:coordinates>-123.06999969482422,49.411192817494346</gml:coordinates>

 * </gml:Point>

 * </cit:the_geom>

 * <cit:NAME>Vancouver</cit:NAME>

 * <cit:CAPITAL>N</cit:CAPITAL>

 * <cit:PROV_NAME>British Columbia</cit:PROV_NAME>

 * </cit:cities>

 * </code>

 * </pre>

 * </p>

 * @author Jorge Piera LLodr? (jorge.piera@iver.es)

 */

public class FeatureTypeBinding {        

        /**

         * It parses a feature

         * @param parser

         * The XML parser

         * @param handler

         * The GPE parser that contains the content handler and

         * the error handler

         * @return

         * A feature

         * @throws XmlPullParserException

         * @throws IOException

         */

        public static Object parse(XmlPullParser parser,GPEGmlParser handler) throws XmlPullParserException, IOException {

                boolean endFeature = false;

                int currentTag;                

                Object feature = null;        

                //Used to finish to parse the current feature member

                String featureRootType = parser.getName();

                Hashtable attributes = GMLUtilsParser.getAttributes(parser);                

                String fid = FeatureTypeBinding.getID(attributes);

                String featureName = featureRootType.substring(featureRootType.indexOf(":") + 1,featureRootType.length());                

                feature = handler.getContentHandler().startFeature(fid, GMLUtilsParser.removeBlancSymbol(featureName), null, null);

                //If the element doesn't has the type it register the warning

                IXSElementDeclaration featureElement = null;

                try {

                        featureElement = handler.getContentHandler().getSchemaMap().getElementDeclarationByName(featureRootType);

                } catch (TypeNotFoundException e) {

                        handler.getErrorHandler().addWarning(e);

                }

                String tag = parser.getName();

                currentTag = parser.getEventType();

                while (!endFeature){

                        switch(currentTag){

                        case XmlPullParser.START_TAG:

                                if (CompareUtils.compareWithOutNamespace(tag,GMLTags.GML_NAME)){

                                        parser.next();

                                        handler.getContentHandler().addNameToFeature(parser.getText(), feature);

                                }else if (CompareUtils.compareWithOutNamespace(tag,GMLTags.GML_DESCRIPTION)){

                                        parser.next();

                                        String description = parser.getText();

                                }else if (CompareUtils.compareWithOutNamespace(tag,GMLTags.GML_BOUNDEDBY)){

                                        Object bbox = BoundedByTypeBinding.parse(parser, handler);

                                        handler.getContentHandler().addBboxToFeature(bbox, feature);

                                }else{

                                        if (!(featureRootType.compareTo(tag) == 0)){                                                

                                                if (GMLGeometries.isGML(tag.substring(tag.indexOf(":") + 1, tag.length()))){

                                                        Object geometry = GeometryBinding.parse(parser, handler);

                                                        handler.getContentHandler().addGeometryToFeature(geometry, feature);

                                                }else{

                                                //Elements (elements or features)

                                                        Object element = ElementTypeBinding.parse(parser, handler, feature, null, featureElement);

                                                        handler.getContentHandler().addElementToFeature(element, feature);

                                                }

                                        }

                                }

                                break;

                        case XmlPullParser.END_TAG:

                                if (tag.compareTo(featureRootType) == 0){                                                

                                        endFeature = true;

                                        handler.getContentHandler().endFeature(feature);

                                }

                                break;

                        case XmlPullParser.TEXT:                                        

                                break;

                        }

                        if (!endFeature){                                        

                                currentTag = parser.next();

                                tag = parser.getName();

                        }

                }                        

                return feature;                

        }        

        /**

         * It returns a the feaure id attribute

         * @param hash

         * Hashtable with the XML attributes

         * @return

         * The id

         */

        public static String getID(Hashtable hash){

                Object obj = hash.get(GMLTags.GML_FID);

                if (obj != null){

                        return (String)obj;

                }

                return null;

        }        

}