Application: gvSIG desktop

package org.gvsig.gpe.kml.reader.bindings;

import java.io.IOException;

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

import org.gvsig.gpe.kml.GPEKmlParser;

import org.gvsig.gpe.kml.reader.bindings.geometries.GeometryBinding;

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: ElementBinding.java 11700 2007-05-16 15:54:36Z jorpiell $

 * $Log$

 * Revision 1.1  2007-05-16 15:54:20  jorpiell

 * Add elements support

 *

 *

 */

/**

 * It parses an element. An element is a tag inside of a 

 * metadata tag

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

 */

public class ElementBinding {

        /**

         * It parses a xml element

         * @param parser

         * The XML parser

         * @param handler

         * The GPE parser that contains the content handler and

         * the error handler

         * @param parentElement

         * The parent element

         * @return

         * A Element

         * @throws XmlPullParserException

         * @throws IOException

         */

        public static Object parse(XmlPullParser parser,GPEKmlParser handler, Object feature, Object parentElement) throws XmlPullParserException, IOException {

                boolean endFeature = false;

                int currentTag;                

                Object element = null;        

                Object value = null;

                boolean isInitialized = false;

                //Used to finish to parse the current element

                String elementRootType = parser.getName();

                Class type = getType(elementRootType);

                String tag = parser.getName();

                currentTag = parser.getEventType();

                while (!endFeature){

                        switch(currentTag){

                        case XmlPullParser.START_TAG:

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

                                        if (!isInitialized){

                                                String elementName = getElementName(elementRootType);

                                                element = handler.getContentHandler().startElement(GMLUtilsParser.removeBlancSymbol(elementName), 

                                                                null,

                                                                type,

                                                                parentElement);

                                                isInitialized = true;

                                        }

                                        ElementBinding.parse(parser, handler, feature, element);

                                }

                                break;

                        case XmlPullParser.END_TAG:

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

                                        endFeature = true;

                                        if (!isInitialized){

                                                String elementName = getElementName(elementRootType);

                                                element = handler.getContentHandler().startElement(GMLUtilsParser.removeBlancSymbol(elementName), 

                                                                value,

                                                                type,

                                                                parentElement);

                                                isInitialized = true;

                                        }

                                        handler.getContentHandler().endElement(element);

                                }

                                break;

                        case XmlPullParser.TEXT:                                        

                                value = getValue(type, parser.getText());

                                break;

                        }

                        if (!endFeature){                                        

                                currentTag = parser.next();

                                tag = parser.getName();

                        }

                }

                return element;                

        }

        /**

         * This method has to calculate the element type

         * @param name

         * Element name

         * @return

         * Element type

         */

        private static Class getType(String name){

                return String.class;

        }

        /**

         * Removes the namespace from a element name

         * @return

         * The element name without namespace

         */

        private static String getElementName(String element){

                return element.substring(element.indexOf(":") + 1,element.length());

        }

        /**

         * This method must return the element value

         * @param type

         * Element type

         * @param value

         * Element value like a String

         * @return

         * Element value

         */

        private static Object getValue(Class type, String value){

                return value;

        }

}