Library: org.gvsig.sldtools

/*******************************************************************************

 *

 *   gvSIG. Desktop Geographic Information System.

 *  

 *   Copyright (C) 2007-2013 gvSIG Association.

 *  

 *   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 3

 *   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., 51 Franklin Street, Fifth Floor, Boston,

 *   MA  02110-1301, USA.

 *  

 *   For any additional information, do not hesitate to contact us

 *   at info AT gvsig.com, or visit our website www.gvsig.com.

 *   

 *******************************************************************************/

package org.gvsig.sldsupport.impl.sld.parsing;

import java.io.IOException;

import java.util.List;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

import org.gvsig.sldsupport.exception.InvalidSLDObjectException;

import org.gvsig.sldsupport.exception.SLDReadException;

import org.gvsig.sldsupport.exception.UnsupportedSLDObjectException;

import org.gvsig.sldsupport.impl.sld.parsing.symbol.SymbolElement;

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

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

import org.gvsig.sldsupport.sld.SLDTags;

import org.gvsig.sldsupport.sld.filter.SLDFilter;

import org.gvsig.sldsupport.sld.graphic.SLDLegendGraphic;

import org.gvsig.sldsupport.sld.rule.SLDRule;

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

public class RuleElement {

    public static void append(SLDRule obj, XmlBuilder xb, String version)

        throws InvalidSLDObjectException, UnsupportedSLDObjectException {

        xb.openTag(SLDTags.RULE);

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

        if (obj.getName() != null) {

            xb.writeTag(SLDTags.NAME, obj.getName());

        }

        // =========

        if ((version != null)

            && (version.compareToIgnoreCase(SLDUtils.VERSION_1_1_0) == 0)) {

            // 1.1.0

            if (obj.getDescription() != null) {

                xb.writeTag(SLDTags.DESCRIPTION, obj.getDescription());

            }

        } else {

            // 1.0.0

            if (obj.getTitle() != null) {

                xb.writeTag(SLDTags.TITLE, obj.getTitle());

            }

            if (obj.getDescription() != null) {

                xb.writeTag(SLDTags.ABSTRACT, obj.getDescription());

            }

        }

        // =========

        if (obj.getLegendGraphic() != null) {

            LegendGraphicElement.append(obj.getLegendGraphic(), xb, version);

        }

        // =========

        if (obj.getFilter() != null) {

            FilterElement.append(obj.getFilter(), xb, version);

        }

        // =========

        if (obj.getMinScaleDenominator() != -1) {

            xb.writeTag(SLDTags.MINSCALEDENOMINATOR,

                SLDUtils.df.format(obj.getMinScaleDenominator()));

        }

        if (obj.getMaxScaleDenominator() != -1) {

            xb.writeTag(SLDTags.MAXSCALEDENOMINATOR,

                SLDUtils.df.format(obj.getMaxScaleDenominator()));

        }

        // =========

        List<SLDSymbol> syms = obj.getSymbols();

        if ((syms == null) || (syms.size() == 0)) {

            throw new InvalidSLDObjectException(SLDTags.RULE,

                "Symbol list is empty");

        } else {

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

                SymbolElement.append(syms.get(i), xb, null);

            }

        }

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

        xb.closeTag();

    }

    public static SLDRule parse(XmlPullParser parser, String version)

        throws XmlPullParserException, IOException, SLDReadException {

        parser.require(XmlPullParser.START_TAG, null, SLDTags.RULE);

        int tag = 0;

        SLDRule resp = new SLDRule();

        tag = parser.nextTag();

        String name = parser.getName();

        String txt = null;

        while (!(SLDUtils.isStr(name, SLDTags.RULE) && (tag == XmlPullParser.END_TAG))) {

            switch (tag) {

            case XmlPullParser.START_TAG:

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

                    txt = parser.nextText();

                    resp.setName(txt);

                    parser.nextTag();

                    break;

                }

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

                    txt = parser.nextText();

                    resp.setTitle(txt);

                    parser.nextTag();

                    break;

                }

                if (SLDUtils.isStr(name, SLDTags.ABSTRACT)

                    || SLDUtils.isStr(name, SLDTags.DESCRIPTION)) {

                    txt = parser.nextText();

                    resp.setDescription(txt);

                    parser.nextTag();

                    break;

                }

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

                    SLDLegendGraphic legr =

                        LegendGraphicElement.parse(parser, version);

                    resp.setLegendGraphic(legr);

                    break;

                }

                if (SLDUtils.isStr(name, SLDTags.FILTER)

                    || SLDUtils.isStr(name, SLDTags.ELSEFILTER)) {

                    SLDFilter filt = FilterElement.parse(parser, version);

                    resp.setFilter(filt);

                    break;

                }

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

                    txt = parser.nextText();

                    resp.setMinScaleDenominator(SLDUtils.parseDouble(txt));

                    parser.nextTag();

                    break;

                }

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

                    txt = parser.nextText();

                    resp.setMaxScaleDenominator(SLDUtils.parseDouble(txt));

                    parser.nextTag();

                    break;

                }

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

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

                if (SLDUtils.isStr(name, SLDTags.POINTSYMBOL)

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

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

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

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

                    || SLDUtils.isStr(name, SLDTags.POLYGONSYMBOLIZER)) {

                    SLDSymbol sym = SymbolElement.parse(parser, version);

                    resp.getSymbols().add(sym);

                    break;

                }

                /*

                 * Text, Raster, MappedColor symbols not supported

                 */

                if (SLDUtils.isStr(name, SLDTags.TEXTSYMBOL)

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

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

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

                    || SLDUtils.isStr(name, SLDTags.MAPPEDCOLORSYMBOL)) {

                    throw new SLDReadException("Unsupported symbol: " + name);

                }

                /*

                 * Any other entity causes parsing error

                 */

                throw new SLDReadException(

                    "Bad SLD file. Unexpected entity in Rule: " + name);

            case XmlPullParser.END_TAG:

                break;

            case XmlPullParser.TEXT:

                break;

            }

            tag = parser.getEventType();

            name = parser.getName();

        }

        parser.nextTag();

        return resp;

    }

}