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.version.sld1_0_0;

import java.io.IOException;

import org.gvsig.sldsupport.exception.SLDReadException;

import org.gvsig.sldsupport.filterencoding.FExpression;

import org.gvsig.sldsupport.graphic.SLDGraphic;

import org.gvsig.sldsupport.util.SLDTags;

import org.gvsig.sldsupport.util.SLDUtils;

import org.gvsig.sldsupport.util.XmlBuilder;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

/**

 * Implements the Graphic element of an SLD implementation specification (version 

 * 1.0.0).<p>

 * A Graphic is a �graphic symbol� with an inherent shape, color(s), and possibly size. A

 * �graphic� can be very informally defined as �a little picture� and can be of either a raster

 * or vector-graphic source type. The term �graphic� is used since the term �symbol� is

 * similar to �symbolizer� which is used in a different context in SLD.<p>

 * If the Graphic element is omitted from the parent element, then nothing will be plotted.<p>

 * Graphics can either be referenced from an external URL in a common format (such as

 * GIF or SVG) or may be derived from a Mark. Multiple external URLs and marks may be

 * referenced with the semantic that they all provide the equivalent graphic in different

 * formats. The �hot spot� to use for positioning the rendering at a point must either be

 * inherent in the external format or is defined to be the �central point� of the graphic,

 * where the exact definition �central point� is system-dependent.<p>

 * The default if neither an ExternalGraphic nor a Mark is specified is to use the default

 * mark of a �square� with a 50%-gray fill and a black outline, with a size of 6 pixels,

 * 

 * @see SLDExternalGraphic1_0_0

 * @see SLDMark1_0_0

 * 

 * @see http://portal.opengeospatial.org/files/?artifact_id=1188

 * 

 * @author pepe vidal salvador - jose.vidal.salvador@iver.es

 */

public class SLDGraphic1_0_0 extends SLDGraphic {

        public void parse(XmlPullParser parser,int cuTag,String tag)

                        throws IOException, XmlPullParserException, SLDReadException  {

                int currentTag;

                boolean end = false;

                parser.require(XmlPullParser.START_TAG, null, tag);

                currentTag = parser.next();

                while (!end)

                {

                        switch(currentTag)

                        {

                        case XmlPullParser.START_TAG:

                                if (parser.getName().compareTo(SLDTags.GRAPHIC)==0) {

                                        this.parseGraphic(parser,SLDTags.GRAPHIC );

                                }

                                break;

                        case XmlPullParser.END_TAG:

                                if (parser.getName().compareTo(tag) == 0)

                                        end = true;

                                break;

                        case XmlPullParser.TEXT:

                                break;

                        }

                        if (!end)

                                currentTag = parser.next();

                }

                parser.require(XmlPullParser.END_TAG, null, tag);

        }

        /**

         * Parses the xml data retrieved from the SLD, it will parse the Graphic element</p>

         * @throws SLDReadException 

         */

        public void parseGraphic(XmlPullParser parser,String tag)throws IOException, XmlPullParserException, SLDReadException  {

                int currentTag;

                boolean end = false;

                parser.require(XmlPullParser.START_TAG, null, tag);

                currentTag = parser.next();

                while (!end)

                {

                        switch(currentTag)

                        {

                        case XmlPullParser.START_TAG:

                                if (parser.getName().compareTo(SLDTags.EXTERNALGRAPHIC)==0) {

                                        SLDExternalGraphic1_0_0 externalGraphic = new SLDExternalGraphic1_0_0();

                                        externalGraphic.parse(parser,currentTag,null);

                                        addExternalGraphic(externalGraphic);

                                }

                                else if (parser.getName().compareTo(SLDTags.MARK)==0) {

                                        SLDMark1_0_0 mark = new SLDMark1_0_0();

                                        mark.parse(parser, currentTag, null);

                                        addMark(mark);

                                }

                                else if (parser.getName().compareTo(SLDTags.OPACITY)==0) {

                                        FExpression expressionOpacity = new FExpression();

                                        parser.next();

                                        String s = parser.getText().trim();

                                        if (s==null || "".equals(s)) {

                                                expressionOpacity.parse(parser, parser.nextTag(),parser.getName());

                                        } else {

                                                if(SLDUtils.isANumber(s))

                                                        expressionOpacity.setLiteral(s);

                                                else throw new SLDReadException(new Exception(

                                                                "Opacity value is not numeric."));

                                        }

                                        setExpressionOpacity(expressionOpacity);

                                }

                                else if (parser.getName().compareTo(SLDTags.SIZE)==0) {

                                        FExpression expressionSize = new FExpression();

                                        parser.next();

                                        String s = parser.getText().trim();

                                        if (s==null || "".equals(s)) {

                                                expressionSize.parse(parser, parser.nextTag(),parser.getName());

                                        } else {

                                                if(SLDUtils.isANumber(s))

                                                        expressionSize.setLiteral(s);

                                                else throw new SLDReadException(new Exception(

                                                                "Size value is not numeric."));

                                        }

                                        setExpressionSize(expressionSize);

                                }

                                else if (parser.getName().compareTo(SLDTags.ROTATION)==0) {

                                        FExpression expressionRotation = new FExpression();

                                        parser.next();

                                        String s = parser.getText().trim();

                                        if (s==null || "".equals(s)) {

                                                expressionRotation.parse(parser, parser.nextTag(),parser.getName());

                                        } else {

                                                if(SLDUtils.isANumber(s))

                                                        expressionRotation.setLiteral(s);

                                                else throw new SLDReadException(new Exception(

                                                                "Rotation value is not numeric."));

                                        }

                                        setExpressionRotation(expressionRotation);

                                }

                                break;

                        case XmlPullParser.END_TAG:

                                if (parser.getName().compareTo(tag) == 0)

                                        end = true;

                                break;

                        case XmlPullParser.TEXT:

                                break;

                        }

                        if (!end)

                                currentTag = parser.next();

                }

                parser.require(XmlPullParser.END_TAG, null, tag);

        }

        public String toXML() {

                XmlBuilder xmlBuilder = new XmlBuilder();

                xmlBuilder.openTag(SLDTags.GRAPHICFILL);

                xmlBuilder.openTag(SLDTags.GRAPHIC);

                //PictureFill

                for (int i = 0; i < getExternalGraphics().size(); i++)  {

                        xmlBuilder.writeRaw(getExternalGraphics().get(i).toXML());

                }

                //MarkerFill

                for (int i = 0; i < getMarks().size(); i++)  {

                        xmlBuilder.writeRaw(getMarks().get(i).toXML());

                }

                if (getExpressionOpacity().getLiteral() != null)

                        xmlBuilder.writeTag(SLDTags.OPACITY

                                        ,this.getExpressionOpacity().getLiteral());

                if (getExpressionSize().getLiteral()!= null)

                        xmlBuilder.writeTag(SLDTags.SIZE

                                        ,getExpressionSize().getLiteral());

                if (getExpressionRotation().getLiteral() != null)

                        xmlBuilder.writeTag(SLDTags.ROTATION

                                        ,getExpressionRotation().getLiteral());

                xmlBuilder.closeTag();

                xmlBuilder.closeTag();

                return xmlBuilder.getXML();

        }

}