Application: gvSIG desktop

/* 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

 */

package org.gvsig.sldsupport.impl.sld1_0_0.handler;

import java.io.IOException;

import java.io.InputStream;

import org.gvsig.sldsupport.exception.SLDException;

import org.gvsig.sldsupport.exception.SLDReadException;

import org.gvsig.sldsupport.impl.parser.ExtendedKXmlParser;

import org.gvsig.sldsupport.impl.sld1_0_0.parsing.NamedLayerElement;

import org.gvsig.sldsupport.impl.sld1_0_0.parsing.UserLayerElement;

import org.gvsig.sldsupport.impl.util.SLDUtils;

import org.gvsig.sldsupport.sld.SLDObject;

import org.gvsig.sldsupport.sld.SLDRoot;

import org.gvsig.sldsupport.sld.SLDTags;

import org.gvsig.sldsupport.sld.layer.SLDLayer;

import org.gvsig.sldsupport.sld.symbol.SLDSymbol;

import org.kxml2.io.KXmlParser;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

public class Handler1_0_0 {

        public Handler1_0_0() {

        }

        public static SLDObject parse(InputStream inStream, String encoding, String version)

                        throws XmlPullParserException, IOException, SLDException {

                int tag;

                XmlPullParser parser = new ExtendedKXmlParser();

                parser.setInput(inStream, encoding);

                tag = parser.getEventType();

                if (tag == XmlPullParser.START_DOCUMENT) {

                        parser.nextTag();

                        parser.require(KXmlParser.START_TAG, null, SLDTags.SLD_ROOT);

                        // Now we are in root

                } else {

                        if (tag != XmlPullParser.START_TAG) {

                                throw new IOException(

                                                "Misplaced input stream (it's not before opening tag)");

                        }

                }

                String name = parser.getName();

                String v = null;

                if (name.compareToIgnoreCase(SLDTags.SLD_ROOT) == 0) {

                        v = parser.getAttributeValue(null, SLDTags.VERSION_ATTR);

                        if (v == null) {

                                throw new SLDReadException(

                                                "Version attribute is missing in " + SLDTags.SLD_ROOT);

                        }

                        SLDRoot root = parseRoot(parser, v);

                        tag = parser.getEventType();

                        // Must be end-document

                        if (tag != KXmlParser.END_DOCUMENT) {

                                throw new SLDReadException(

                                                "Expected end of document after closing '"

                                                + SLDTags.SLD_ROOT + "' tag");

                        }

                        return root;

                } else {

                        if (name.compareToIgnoreCase(SLDTags.USERDEFINEDLAYER) == 0

                                        || name.compareToIgnoreCase(SLDTags.NAMEDLAYER) == 0) {

                                /*

                                 * This line is out of the SLD standard

                                 */

                                v = parser.getAttributeValue(null, SLDTags.VERSION_ATTR);

                                return parseLayer(parser, v);

                        } else {

                                if (name.compareToIgnoreCase(SLDTags.LINESYMBOLIZER) == 0

                                                || name.compareToIgnoreCase(SLDTags.POLYGONSYMBOLIZER) == 0

                                                || name.compareToIgnoreCase(SLDTags.POINTSYMBOLIZER) == 0

                                                || name.compareToIgnoreCase(SLDTags.TEXTSYMBOLIZER) == 0

                                                || name.compareToIgnoreCase(SLDTags.RASTERSYMBOLIZER) == 0) {

                                        /*

                                         * This line is out of the SLD standard

                                         */

                                        v = parser.getAttributeValue(null, SLDTags.VERSION_ATTR);

                                        return parseSymbol(parser, v);

                                }

                        }

                }

                throw new SLDReadException(

                                "Misplaced input stream. Bad opening tag: " + name);

        }

        private static SLDSymbol parseSymbol(XmlPullParser parser, String version)

                        throws XmlPullParserException, IOException, SLDReadException {

                return null;

        }

        private static SLDLayer parseLayer(XmlPullParser parser, String version)

                        throws XmlPullParserException, IOException, SLDReadException {

                String name = parser.getName();

                SLDLayer resp = null;

                if (SLDUtils.isStr(name, SLDTags.NAMEDLAYER)) {

                        resp = NamedLayerElement.parse(parser, version);

                } else {

                        if (SLDUtils.isStr(name, SLDTags.USERDEFINEDLAYER)) {

                                resp = UserLayerElement.parse(parser, version);

                        } else {

                                throw new SLDReadException(

                                                "Expected layer, found: '" + name + "' tag");

                        }

                }

                return resp;

        }

        private static SLDRoot parseRoot(XmlPullParser parser, String version)

                        throws XmlPullParserException, IOException, SLDReadException {

                parser.require(KXmlParser.START_TAG, null, SLDTags.SLD_ROOT);

                int tag = parser.nextTag();

                String name = parser.getName();

                SLDLayer layer_item = null;

                SLDRoot resp = new SLDRoot(version);

                while (tag == KXmlParser.START_TAG  &&

                                (SLDUtils.isStr(name, SLDTags.USERDEFINEDLAYER) ||

                                SLDUtils.isStr(name, SLDTags.NAMEDLAYER))) {

                        layer_item = parseLayer(parser, version);

                        resp.getLayers().add(layer_item);

                        // =============

                        name = parser.getName();

                        tag = parser.getEventType();

                }

                parser.require(KXmlParser.END_TAG, null, SLDTags.SLD_ROOT);

                parser.next(); // goes to end of doc

                return resp;

        }

}