Application: gvSIG desktop » gvSIG data provider for GPE

package org.gvsig.gpe.gml.parser.v2.features;

import java.io.IOException;

import javax.xml.namespace.QName;

import org.gvsig.gpe.gml.parser.GPEDefaultGmlParser;

import org.gvsig.gpe.gml.parser.profiles.IBindingProfile;

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

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

import org.gvsig.gpe.parser.IGPEContentHandler;

import org.gvsig.gpe.xml.stream.EventType;

import org.gvsig.gpe.xml.stream.IXmlStreamReader;

import org.gvsig.gpe.xml.stream.XmlStreamException;

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

import org.gvsig.gpe.xml.utils.XMLAttributesIterator;

/* 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: FeatureCollectionBinding.java 350 2008-01-09 12:53:07Z jpiera $

 * $Log$

 * Revision 1.2  2007/06/29 12:19:34  jorpiell

 * The schema validation is made independently of the concrete writer

 *

 * Revision 1.1  2007/06/07 14:53:30  jorpiell

 * Add the schema support

 *

 *

 */

/**

 * This class parses the gml objects that has a gml:FeatureCollection type. Example:

 * <p>

 * 

 * <pre>

 * <code>

 * <gml:featureCollection>

 * <gml:featureMember> 

 * </gml:featureMember>

 * <gml:featureMember> 

 * </gml:featureMember>

 * </gml:featureCollection>

 * </code>

 * </pre>

 * 

 * </p>

 * 

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

 */

public class FeatureCollectionBinding {

    /**

     * It parses a feature collection

     * 

     * @param parser

     *            The XML parser

     * @param handler

     *            The GPE parser that contains the content handler and the error handler

     * @return A feature

     * @throws XmlStreamException

     * @throws IOException

     */

    public Object parse(IXmlStreamReader parser, GPEDefaultGmlParser handler)

            throws XmlStreamException, IOException {

        if(!parser.getEventType().isTag()){

            parser.nextTag();

        }

        boolean endCollection = false;

        EventType currentTag;

        Object layer = null;

        final QName layerRootType = parser.getElementName();

        XMLAttributesIterator attributesIterator = new XMLAttributesIterator(parser);

        final IBindingProfile profile = handler.getProfile();

        String fid = profile.getFeatureTypeBinding().getID(

                attributesIterator.getAttributes());

        final IGPEContentHandler contentHandler = handler.getContentHandler();

        layer = contentHandler.startLayer(fid, layerRootType.getNamespaceURI(),

                null, null, null, attributesIterator, null, null);

        QName tag = parser.getElementName();

        currentTag = parser.getEventType();

        while (!endCollection) {

            switch (currentTag.getCode()) {

            case EventType.START_ELEMENT_CODE:

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

                    parser.next();

                    contentHandler.addNameToLayer(parser.getText(), layer);

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

                    parser.next();

                    contentHandler.addDescriptionToLayer(parser.getText(), layer);

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

                    Object bbox = profile.getBoundedByTypeBinding().parse(parser,

                            handler);

                    contentHandler.addBboxToLayer(bbox, layer);

                } else if (CompareUtils.compareWithNamespace(tag, GMLTags.GML_FEATUREMEMBER)) {

                    GMLObject object = (GMLObject) profile

                            .getFeatureMemberTypeBinding().parse(parser, handler);

                    if (object != null) {

                        if (GMLObject.FEATURE == object.getType()) {

                            contentHandler

                                    .addFeatureToLayer(object.getObject(), layer);

                        } else {

                            contentHandler.addParentLayerToLayer(layer,

                                    object.getObject());

                        }

                    }

                } else if (CompareUtils.compareWithNamespace(tag, GMLTags.GML_FEATUREMEMBERS)) {

                    profile.getFeatureMembersTypeBinding().parse(parser, handler,

                            layer);

                } else {

                    if (!(CompareUtils.compareWithNamespace(layerRootType, tag))) {

                        // Feature members

                        GMLObject object = (GMLObject) profile.getFeatureTypeBinding()

                                .parse(parser, handler);

                        contentHandler.addFeatureToLayer(object.getObject(), layer);

                    }

                }

                break;

            case EventType.END_ELEMENT_CODE:

                if (CompareUtils.compareWithNamespace(tag, layerRootType)) {

                    endCollection = true;

                    contentHandler.endLayer(layer);

                }

                break;

            case EventType.END_DOCUMENT_CODE:

                endCollection = true;

                break;

            }

            if (!endCollection) {

                currentTag = parser.nextTag();

                tag = parser.getElementName();

            }

        }

        return layer;

    }

}