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.util.SLDUtils;

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

import org.gvsig.sldsupport.sld.SLDTags;

import org.gvsig.sldsupport.sld.filter.expression.SLDExpression;

import org.gvsig.sldsupport.sld.filter.expression.operator.SLDLiteral;

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

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

import org.gvsig.sldsupport.sld.symbol.misc.SLDParameterValue;

import org.gvsig.sldsupport.sld.symbol.misc.SLDStroke;

import org.gvsig.sldsupport.sld.symbol.misc.SLDSvgCssParameter;

public class StrokeElement {

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

        throws InvalidSLDObjectException, UnsupportedSLDObjectException {

        SLDParameterValue pv = null;

        xb.openTag(SLDTags.STROKE);

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

        if (obj.getStrokeType() == SLDStroke.STROKE_TYPE_GRAPHIC_FILL) {

            if (obj.getGraphic() == null) {

                throw new InvalidSLDObjectException(SLDTags.STROKE,

                    "No graphic found as graphic fill");

            }

            SLDGraphicFill gf = new SLDGraphicFill(obj.getGraphic());

            GraphicFillElement.append(gf, xb, version);

        } else {

            if (obj.getStrokeType() == SLDStroke.STROKE_TYPE_GRAPHIC_STROKE) {

                if (obj.getGraphic() == null) {

                    throw new InvalidSLDObjectException(SLDTags.STROKE,

                        "No graphic found as graphic stroke");

                }

                SLDGraphicStroke gs = new SLDGraphicStroke(obj.getGraphic());

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

                    pv = new SLDParameterValue();

                    pv.getExpressionList().add(

                        new SLDLiteral(SLDUtils.df.format(obj

                            .getGraphicStrokeGap().doubleValue())));

                    gs.setGap(pv);

                }

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

                    pv = new SLDParameterValue();

                    pv.getExpressionList().add(

                        new SLDLiteral(SLDUtils.df.format(obj

                            .getGraphicStrokeInitialGap().doubleValue())));

                    gs.setInitialGap(pv);

                }

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

                GraphicStrokeElement.append(gs, xb, version);

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

            }

        }

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

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

            SLDSvgCssParameter p = new SLDSvgCssParameter();

            p.setName(SLDTags.STROKE_ATTR);

            p.getExpressionList().add(obj.getColor());

            SvgCssParameterElement.append(p, xb, version);

        }

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

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

            SLDSvgCssParameter p = new SLDSvgCssParameter();

            p.setName(SLDTags.STROKE_WIDTH_ATTR);

            p.getExpressionList().add(obj.getWidth());

            SvgCssParameterElement.append(p, xb, version);

        }

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

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

            SLDSvgCssParameter p = new SLDSvgCssParameter();

            p.setName(SLDTags.STROKE_OPACITY_ATTR);

            p.getExpressionList().add(obj.getOpacity());

            SvgCssParameterElement.append(p, xb, version);

        }

        // ======

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

            SLDSvgCssParameter p = new SLDSvgCssParameter();

            p.setName(SLDTags.STROKE_LINECAP_ATTR);

            p.getExpressionList().add(obj.getLineCap());

            SvgCssParameterElement.append(p, xb, version);

        }

        // ======

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

            SLDSvgCssParameter p = new SLDSvgCssParameter();

            p.setName(SLDTags.STROKE_LINEJOIN_ATTR);

            p.getExpressionList().add(obj.getLineJoin());

            SvgCssParameterElement.append(p, xb, version);

        }

        // ======

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

            SLDSvgCssParameter p = new SLDSvgCssParameter();

            p.setName(SLDTags.STROKE_DASHOFFSET_ATTR);

            p.getExpressionList().add(obj.getDashOffset());

            SvgCssParameterElement.append(p, xb, version);

        }

        // ======

        List<Float> list = obj.getDashArray();

        if ((list != null) && (list.size() > 0)) {

            String arr = SLDUtils.getAsString(list, " ");

            SLDSvgCssParameter p = new SLDSvgCssParameter();

            p.setName(SLDTags.STROKE_DASHARRAY_ATTR);

            p.getExpressionList().add(new SLDLiteral(arr));

            SvgCssParameterElement.append(p, xb, version);

        }

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

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

        xb.closeTag();

    }

    public static SLDStroke parse(XmlPullParser parser, String version)

        throws XmlPullParserException, IOException, SLDReadException {

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

        int tag = 0;

        SLDStroke resp = new SLDStroke();

        tag = parser.nextTag();

        String name = parser.getName();

        String txt = null;

        String attName = null;

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

            switch (tag) {

            case XmlPullParser.START_TAG:

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

                    SLDGraphicFill gf =

                        GraphicFillElement.parse(parser, version);

                    resp.setStrokeType(SLDStroke.STROKE_TYPE_GRAPHIC_FILL);

                    resp.setGraphic(gf.getGraphic());

                    break;

                }

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

                    SLDGraphicStroke gf =

                        GraphicStrokeElement.parse(parser, version);

                    resp.setStrokeType(SLDStroke.STROKE_TYPE_GRAPHIC_STROKE);

                    resp.setGraphic(gf.getGraphic());

                    break;

                }

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

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

                    SLDSvgCssParameter sp =

                        SvgCssParameterElement.parse(parser, version);

                    if (SLDUtils.isStr(sp.getName(), SLDTags.STROKE_ATTR)) {

                        if (sp.getExpressionList().size() > 0) {

                            // Using first item only

                            resp.setColor(sp.getExpressionList().get(0));

                        }

                        break;

                    }

                    if (SLDUtils.isStr(sp.getName(),

                        SLDTags.STROKE_OPACITY_ATTR)) {

                        if (sp.getExpressionList().size() > 0) {

                            resp.setOpacity(sp.getExpressionList().get(0));

                        }

                        break;

                    }

                    if (SLDUtils.isStr(sp.getName(), SLDTags.STROKE_WIDTH_ATTR)) {

                        if (sp.getExpressionList().size() > 0) {

                            resp.setWidth(sp.getExpressionList().get(0));

                        }

                        break;

                    }

                    if (SLDUtils.isStr(sp.getName(),

                        SLDTags.STROKE_LINEJOIN_ATTR)) {

                        if (sp.getExpressionList().size() > 0) {

                            resp.setLineJoin(sp.getExpressionList().get(0));

                        }

                        break;

                    }

                    if (SLDUtils.isStr(sp.getName(),

                        SLDTags.STROKE_LINECAP_ATTR)) {

                        if (sp.getExpressionList().size() > 0) {

                            resp.setLineCap(sp.getExpressionList().get(0));

                        }

                        break;

                    }

                    if (SLDUtils.isStr(sp.getName(),

                        SLDTags.STROKE_DASHOFFSET_ATTR)) {

                        if (sp.getExpressionList().size() > 0) {

                            resp.setDashOffset(sp.getExpressionList().get(0));

                        }

                        break;

                    }

                    if (SLDUtils.isStr(sp.getName(),

                        SLDTags.STROKE_DASHARRAY_ATTR)) {

                        if (sp.getExpressionList().size() > 0) {

                            SLDExpression expr = sp.getExpressionList().get(0);

                            if (expr instanceof SLDLiteral) {

                                SLDLiteral lite = (SLDLiteral) expr;

                                List<Float> floats =

                                    SLDUtils.getAsFloats(lite.getValue(), " ");

                                resp.getDashArray().addAll(floats);

                            }

                        }

                        break;

                    }

                    break;

                }

                /*

                 * Any other entity causes parsing error

                 */

                throw new SLDReadException(

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

            case XmlPullParser.END_TAG:

                break;

            case XmlPullParser.TEXT:

                break;

            }

            tag = parser.getEventType();

            name = parser.getName();

        }

        parser.nextTag();

        return resp;

    }

}