/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org. All rights reserved.
* This code is licensed under the GPL 2.0 license, availible at the root
* application directory.
*/
package org.vfny.geoserver.wms.responses.map.kml;
import java.awt.Color;
import java.awt.Paint;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.StringWriter;
import java.nio.charset.Charset;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.NoSuchElementException;
import java.util.logging.Logger;
import javax.servlet.http.HttpServletRequest;
import javax.xml.transform.TransformerException;
import org.geoserver.template.FeatureWrapper;
import org.geoserver.template.GeoServerTemplateLoader;
import org.geoserver.wms.WMS;
import org.geotools.coverage.grid.io.AbstractGridCoverage2DReader;
import org.geotools.data.DataSourceException;
import org.geotools.feature.FeatureCollection;
import org.geotools.feature.FeatureIterator;
import org.geotools.feature.FeatureTypes;
import org.geotools.feature.IllegalAttributeException;
import org.geotools.geometry.jts.JTS;
import org.geotools.gml.producer.GeometryTransformer;
import org.geotools.map.MapLayer;
import org.geotools.referencing.CRS;
import org.geotools.renderer.style.LineStyle2D;
import org.geotools.renderer.style.MarkStyle2D;
import org.geotools.renderer.style.PolygonStyle2D;
import org.geotools.renderer.style.SLDStyleFactory;
import org.geotools.renderer.style.Style2D;
import org.geotools.renderer.style.TextStyle2D;
import org.geotools.styling.FeatureTypeStyle;
import org.geotools.styling.LineSymbolizer;
import org.geotools.styling.Mark;
import org.geotools.styling.PointSymbolizer;
import org.geotools.styling.PolygonSymbolizer;
import org.geotools.styling.RasterSymbolizer;
import org.geotools.styling.Rule;
import org.geotools.styling.Style;
import org.geotools.styling.Symbolizer;
import org.geotools.styling.TextSymbolizer;
import org.geotools.util.NumberRange;
import org.geotools.util.Range;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.feature.type.GeometryDescriptor;
import org.opengis.filter.Filter;
import org.opengis.filter.expression.Expression;
import org.opengis.geometry.MismatchedDimensionException;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.operation.MathTransform;
import org.opengis.referencing.operation.TransformException;
import org.vfny.geoserver.wms.WMSMapContext;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryCollection;
import com.vividsolutions.jts.geom.MultiLineString;
import com.vividsolutions.jts.geom.MultiPoint;
import com.vividsolutions.jts.geom.MultiPolygon;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;
/**
* Writer for KML/KMZ (Keyhole Markup Language) files. Normaly controled by an
* EncodeKML instance, this class handles the styling information and ensures
* that the geometries produced match the pseudo GML expected by GE.
*
* @REVISIT: Once this is fully working, revisit as an extention to
* TransformerBase
* @author James Macgill
* @author $Author: Alessio Fabiani (alessio.fabiani@gmail.com) $
* @author $Author: Simone Giannecchini (simboss1@gmail.com) $
* @author Brent Owens
*
* @deprecated use {@link KMLTransformer}.
*/
public class KMLWriter extends OutputStreamWriter {
private static final Logger LOGGER = org.geotools.util.logging.Logging
.getLogger(KMLWriter.class.getPackage().getName());
/**
* a number formatter set up to write KML legible numbers
*/
private static DecimalFormat formatter;
/**
* The template configuration
*/
private static Configuration templateConfig;
/**
* Resolves the FeatureTypeStyle info per feature into a Style2D object.
*/
private SLDStyleFactory styleFactory = new SLDStyleFactory();
// TODO: calcuate a real value based on image size to bbox ratio, as image
// size has no meanining for KML yet this is a fudge.
private double scaleDenominator = 1;
/** Tolerance used to compare doubles for equality */
private static final double TOLERANCE = 1e-6;
/**
* The CRS of the data we are querying. It is a bit of a hack because
* sometimes when we grab the CRS from the feature itself, we get null. This
* variable is paired with setSourceCrs() so EncodeKML can can use the
* feature type's schema to set the CRS.
*/
private CoordinateReferenceSystem sourceCrs;
/**
* Handles the outputing of geometries as GML
*/
private GeometryTransformer transformer;
static {
Locale locale = new Locale("en", "US");
DecimalFormatSymbols decimalSymbols = new DecimalFormatSymbols(locale);
decimalSymbols.setDecimalSeparator('.');
formatter = new DecimalFormat();
formatter.setDecimalFormatSymbols(decimalSymbols);
// do not group
formatter.setGroupingSize(0);
// do not show decimal separator if it is not needed
formatter.setDecimalSeparatorAlwaysShown(false);
formatter.setDecimalFormatSymbols(null);
// set default number of fraction digits
formatter.setMaximumFractionDigits(5);
// minimun fraction digits to 0 so they get not rendered if not needed
formatter.setMinimumFractionDigits(0);
// initialize the template engine, this is static to maintain a cache
// over instantiations of kml writer
templateConfig = new Configuration();
templateConfig.setObjectWrapper(new FeatureWrapper());
}
/** Holds the map layer set, styling info and area of interest bounds */
private WMSMapContext mapContext;
/**
* Creates a new KMLWriter object.
*
* @param out
* OutputStream to write the KML into
* @param config
* WMSMapContext describing the map to be generated.
*/
public KMLWriter(OutputStream out, WMSMapContext mapContext) {
super(out, Charset.forName("UTF-8"));
this.mapContext = mapContext;
transformer = new GeometryTransformer();
// transformer.setUseDummyZ(true);
transformer.setOmitXMLDeclaration(true);
transformer.setNamespaceDeclarationEnabled(true);
WMS config = mapContext.getRequest().getWMS();
transformer.setNumDecimals(config.getNumDecimals());
}
/**
* Sets the maximum number of digits allowed in the fraction portion of a
* number.
*
* @param numDigits
* @see NumberFormat#setMaximumFractionDigits
*/
public void setMaximunFractionDigits(int numDigits) {
formatter.setMaximumFractionDigits(numDigits);
}
/**
* Gets the maximum number of digits allowed in the fraction portion of a
* number.
*
* @return int numDigits
* @see NumberFormat#getMaximumFractionDigits
*/
public int getMaximunFractionDigits() {
return formatter.getMaximumFractionDigits();
}
/**
* Sets the minimum number of digits allowed in the fraction portion of a
* number.
*
* @param numDigits
* @see NumberFormat#setMinimumFractionDigits
*/
public void setMinimunFractionDigits(int numDigits) {
formatter.setMinimumFractionDigits(numDigits);
}
/*
* Sets the minimum number of digits allowed in the fraction portion of a
* number.
*
* @param numDigits
*
* @see NumberFormat#getMinimumFractionDigits
*/
public int getMinimunFractionDigits() {
return formatter.getMinimumFractionDigits();
}
public void setRequestedScale(double scale) {
scaleDenominator = scale;
}
public void setSourceCrs(CoordinateReferenceSystem crs) {
sourceCrs = crs;
}
/**
* Formated version of standard write double
*
* @param d
* The double to format and write out.
*
* @throws IOException
*/
public void write(double d) throws IOException {
write(formatter.format(d));
}
/**
* Convinience method to add a newline char to the output
*
* @throws IOException
*/
public void newline() throws IOException {
super.write('\n');
}
public void writeFeaturesAsRaster(
final FeatureCollection<SimpleFeatureType, SimpleFeature> features,
final MapLayer layer, final int order) throws IOException,
AbortedException {
Style style = layer.getStyle();
try {
SimpleFeatureType featureType = features.getSchema();
setUpWriterHandler(featureType);
FeatureTypeStyle[] fts = style.getFeatureTypeStyles();
processStylersRaster(features, fts, layer, order);
LOGGER.fine("encoded " + featureType.getTypeName().toString());
} catch (NoSuchElementException ex) {
throw new DataSourceException(ex.getMessage(), ex);
} catch (IllegalAttributeException ex) {
throw new DataSourceException(ex.getMessage(), ex);
}
}
public void writeFeaturesAsVectors(
final FeatureCollection<SimpleFeatureType, SimpleFeature> features,
final MapLayer layer) throws IOException, AbortedException {
Style style = layer.getStyle();
try {
SimpleFeatureType featureType = features.getSchema();
setUpWriterHandler(featureType);
FeatureTypeStyle[] fts = style.getFeatureTypeStyles();
processStylersVector(features, fts, layer);
LOGGER.fine("encoded " + featureType.getTypeName().toString());
} catch (NoSuchElementException ex) {
throw new DataSourceException(ex.getMessage(), ex);
} catch (IllegalAttributeException ex) {
throw new DataSourceException(ex.getMessage(), ex);
}
}
public void writeCoverages(
final FeatureCollection<SimpleFeatureType, SimpleFeature> features,
final MapLayer layer) throws IOException, AbortedException {
Style style = layer.getStyle();
try {
SimpleFeatureType featureType = features.getSchema();
setUpWriterHandler(featureType);
FeatureTypeStyle[] fts = style.getFeatureTypeStyles();
processStylersCoverage(features, fts, layer);
LOGGER.fine("encoded " + featureType.getTypeName().toString());
} catch (NoSuchElementException ex) {
throw new DataSourceException(ex.getMessage(), ex);
} catch (IllegalAttributeException ex) {
throw new DataSourceException(ex.getMessage(), ex);
}
}
/**
* Write all the features in a collection which pass the rules in the
* provided Style object.
*
* @TODO: support Name and Description information
*/
/*
* public void writeFeatures(final FeatureCollection features, final
* MapLayer layer, final int order, final boolean kmz, final boolean
* vectorResult) throws IOException, AbortedException { Style style =
* layer.getStyle();
*
* try { FeatureType featureType = features.getSchema();
*
* setUpWriterHandler(featureType); FeatureTypeStyle[] fts =
* style.getFeatureTypeStyles(); if (!kmz) processStylers(features, fts,
* layer, order); else processStylersKMZ(features, fts, layer, order,
* vectorResult);
*
*
* LOGGER.fine(new StringBuffer("encoded
* ").append(featureType.getTypeName()).toString()); } catch
* (NoSuchElementException ex) { throw new
* DataSourceException(ex.getMessage(), ex); } catch
* (IllegalAttributeException ex) { throw new
* DataSourceException(ex.getMessage(), ex); } }
*/
/**
* Start a new KML folder. From the spec 2.0: A top-level, optional tag used
* to structure hierarchical arrangement of other folders, placemarks,
* ground overlays, and screen overlays. Use this tag to structure and
* organize your information in the Google Earth client.
*
* In this context we should be using a Folder per map layer.
*
* @param name
* A String to label this folder with, if null the name tag will
* be ommited
* @param description
* Supplies descriptive information. This description appears in
* the Places window when the user clicks on the folder or ground
* overlay, and in a pop-up window when the user clicks on either
* the Placemark name in the Places window, or the placemark
* icon. The description element supports plain text as well as
* HTML formatting. A valid URL string for the World Wide Web is
* automatically converted to a hyperlink to that URL (e.g.
* http://www.google.com). if null the description tag will be
* ommited
*/
public void startFolder(String name, String description) throws IOException {
write("<Folder>");
if (name != null) {
write("<name>" + name + "</name>");
}
if (description != null) {
write("<description>" + description + "</description>");
}
}
public void startDocument(String name, String description)
throws IOException {
write("<Document>");
if (name != null) {
write("<name>" + name + "</name>");
}
if (description != null) {
write("<description>" + description + "</description>");
}
}
public void endFolder() throws IOException {
write("</Folder>");
}
public void endDocument() throws IOException {
write("</Document>");
}
/**
* Gather any information needed to write the KML document.
*
* @TODO: support writing of 'Schema' tags based on featureType
*/
private void setUpWriterHandler(SimpleFeatureType featureType)
throws IOException {
String typeName = featureType.getTypeName();
/*
* REVISIT: To use attributes properly we need to be using the 'schema'
* part of KML to contain custom data..
*/
List atts = new ArrayList(0); // config.getAttributes(typeName);
}
/**
* Write out the geometry. Contains workaround for the fact that KML2.0 does
* not support multipart geometries in the same way that GML does.
*
* @param geom
* The Geometry to be encoded, multi part geometries will be
* written as a sequence.
* @param trans
* A GeometryTransformer to produce the gml output, its output is
* post processed to remove gml namespace prefixes.
*/
protected void writeGeometry(Geometry geom, GeometryTransformer trans)
throws IOException, TransformerException {
if (isMultiPart(geom)) {
for (int i = 0; i < geom.getNumGeometries(); i++) {
writeGeometry(geom.getGeometryN(i), trans);
}
} else {
// remove gml prefixing as KML does not accept them
StringWriter tempWriter = new StringWriter();
// trans.setNumDecimals(config.getNumDecimals());
trans.transform(geom, tempWriter);
String tempBuffer = tempWriter.toString();
// @REVISIT: should check which prefix is being used, this will only
// work for the default (99.9%) of cases.
write(tempBuffer.replaceAll("gml:", ""));
}
}
protected void writeLookAt(Geometry geom, GeometryTransformer trans)
throws IOException, TransformerException {
final Coordinate[] coordinates = getCentroid(geom).getCoordinates();
write("<LookAt>");
write("<longitude>" + coordinates[0].x + "</longitude>");
write("<latitude>" + coordinates[0].y + "</latitude>");
write("<heading>10.0</heading>");
write("<tilt>10.0</tilt>");
write("<range>700</range>");
write("</LookAt>");
}
protected void writePlaceMarkPoint(Geometry geom, GeometryTransformer trans)
throws IOException, TransformerException {
final Coordinate[] coordinates = getCentroid(geom).getCoordinates();
write("<Point><coordinates>" + coordinates[0].x + ","
+ coordinates[0].y + "," + coordinates[0].z
+ "</coordinates></Point>");
}
/**
* Test to see if the geometry is a Multi geometry
*
* @return true if geom instance of MultiPolygon, MultiPoint or
* MultiLineString
*/
protected boolean isMultiPart(Geometry geom) {
Class geomClass = geom.getClass();
return (geomClass.equals(MultiPolygon.class)
|| geomClass.equals(MultiPoint.class) || geomClass
.equals(MultiLineString.class));
}
/**
* Applies each feature type styler in turn to all of the features.
*
* @param features
* A FeatureCollection contatining the features to be rendered
* @param featureStylers
* An array of feature stylers to be applied
* @throws IOException
* @throws IllegalAttributeException
* @TODO: multiple features types result in muliple data passes, could be
* split into separate tempory files then joined.
*/
private void processStylersVector(
final FeatureCollection<SimpleFeatureType, SimpleFeature> features,
final FeatureTypeStyle[] featureStylers, final MapLayer layer)
throws IOException, IllegalAttributeException {
final int ftsLength = featureStylers.length;
for (int i = 0; i < ftsLength; i++) {
FeatureTypeStyle fts = featureStylers[i];
final String typeName = features.getSchema().getTypeName();
if ((typeName != null)
&& (FeatureTypes.isDecendedFrom(features.getSchema(), null,
fts.getFeatureTypeName()) || typeName
.equalsIgnoreCase(fts.getFeatureTypeName()))) {
// get applicable rules at the current scale
Rule[] rules = fts.getRules();
List ruleList = new ArrayList();
List elseRuleList = new ArrayList();
populateRuleLists(rules, ruleList, elseRuleList, false);
if ((ruleList.size() == 0) && (elseRuleList.size() == 0)) {
return; // bail out early if no rules made it (because of
// scale denominators)
}
// REVISIT: once scaleDemominator can actualy be determined
// re-evaluate sensible ranges for GE
NumberRange scaleRange = new NumberRange(scaleDenominator,
scaleDenominator);
FeatureIterator<SimpleFeature> reader = features.features();
while (true) {
try {
if (!reader.hasNext()) {
break;
}
boolean doElse = true;
SimpleFeature feature = reader.next();
StringBuffer featureLabel = new StringBuffer(""); // this
// gets filled in if there is a textsymbolizer
String id = feature.getID();
id = id.replaceAll("&", "");
id = id.replaceAll(">", "");
id = id.replaceAll("<", "");
id = id.replaceAll("%", "");
startDocument(id, layer.getTitle());
// start writing out the styles
write("<Style id=\"GeoServerStyle" + feature.getID()
+ "\">");
// applicable rules
for (Iterator it = ruleList.iterator(); it.hasNext();) {
Rule r = (Rule) it.next();
LOGGER.finer(new StringBuffer("applying rule: ")
.append(r.toString()).toString());
Filter filter = r.getFilter();
// if there is no filter or the filter says to do
// the feature anyways, render it
if ((filter == null) || filter.evaluate(feature)) {
doElse = false;
LOGGER.finer("processing Symobolizer ...");
Symbolizer[] symbolizers = r.getSymbolizers();
processVectorSymbolizers(feature, symbolizers,
scaleRange, featureLabel);
}
}
if (doElse) {
// rules with an else filter
LOGGER.finer("rules with an else filter");
for (Iterator it = elseRuleList.iterator(); it
.hasNext();) {
Rule r = (Rule) it.next();
Symbolizer[] symbolizers = r.getSymbolizers();
LOGGER.finer("processing Symobolizer ...");
processVectorSymbolizers(feature, symbolizers,
scaleRange, featureLabel);
}
}
write("</Style>"); // close off styles
// we have written out the style, so now lets write out
// the geometry
String fTitle = featureLabel.toString();
if (fTitle.equals("")) {
fTitle = feature.getID();
}
write("<Placemark>");
write("<name><![CDATA[" + featureLabel + "]]></name>"); // CDATA
// needed
// for
// ampersands
final SimpleFeatureType schema = features.getSchema();
// if there are supposed to be detailed descriptions,
// write them out
write("<description><![CDATA[");
writeDescription(feature, schema);
write("]]></description>");
writeLookAt(findGeometry(feature), transformer);
write("<styleUrl>#GeoServerStyle" + feature.getID()
+ "</styleUrl>");
write("<MultiGeometry>");
writePlaceMarkPoint(findGeometry(feature), transformer);
writeGeometry(findGeometry(feature), transformer);
write("</MultiGeometry>");
write("</Placemark>");
newline();
endDocument(); // </Document>
} catch (Exception e) {
// that feature failed but others may still work
// REVISIT: don't like eating exceptions, even with a
// log.
// e.printStackTrace();
LOGGER.warning(new StringBuffer(
"KML transform for feature failed ").append(
e.getMessage()).toString());
}
}
// FeatureIterators may be backed by a stream so this tidies
// things up.
features.close(reader);
}
}
}
/**
* Applies each feature type styler in turn to all of the features.
*
* @param features
* A FeatureCollection contatining the features to be rendered
* @param featureStylers
* An array of feature stylers to be applied
* @throws IOException
* @throws IllegalAttributeException
* @TODO: multiple features types result in muliple data passes, could be
* split into separate tempory files then joined.
*/
private void processStylersCoverage(
final FeatureCollection<SimpleFeatureType, SimpleFeature> features,
final FeatureTypeStyle[] featureStylers, final MapLayer layer)
throws IOException, IllegalAttributeException {
final int ftStylesLength = featureStylers.length;
for (int i = 0; i < ftStylesLength; i++) { // for each style
FeatureTypeStyle fts = featureStylers[i];
String typeName = features.getSchema().getTypeName();
if ((typeName != null)
&& (FeatureTypes.isDecendedFrom(features.getSchema(), null,
fts.getFeatureTypeName()) || typeName
.equalsIgnoreCase(fts.getFeatureTypeName()))) {
// get applicable rules at the current scale
Rule[] rules = fts.getRules();
List ruleList = new ArrayList();
List elseRuleList = new ArrayList();
populateRuleLists(rules, ruleList, elseRuleList, false);
if ((ruleList.size() == 0) && (elseRuleList.size() == 0)) {
return;
}
FeatureIterator<SimpleFeature> reader = features.features();
// we aren't going to iterate through the features because we
// just need to prepare
// the kml document for one feature; it is a raster result.
try {
if (!reader.hasNext()) {
continue; // no features, so move on
}
boolean doElse = true;
SimpleFeature feature = reader.next();
// applicable rules
for (Iterator it = ruleList.iterator(); it.hasNext();) {
Rule r = (Rule) it.next();
LOGGER.finer(new StringBuffer("applying rule: ")
.append(r.toString()).toString());
Filter filter = r.getFilter();
if ((filter == null) || filter.evaluate(feature)) {
doElse = false;
LOGGER
.finer("processing raster-result Symobolizer ...");
Symbolizer[] symbolizers = r.getSymbolizers();
processRasterSymbolizersForCoverage(feature,
symbolizers, layer);
}
}
if (doElse) {
// rules with an else filter
LOGGER.finer("rules with an else filter");
for (Iterator it = elseRuleList.iterator(); it
.hasNext();) {
Rule r = (Rule) it.next();
Symbolizer[] symbolizers = r.getSymbolizers();
LOGGER
.finer("processing raster-result Symobolizer ...");
processRasterSymbolizersForCoverage(feature,
symbolizers, layer);
}
}
} catch (Exception e) {
// that feature failed but others may still work
// REVISIT: don't like eating exceptions, even with a log.
LOGGER.warning(new StringBuffer(
"KML transform for feature failed ").append(
e.getMessage()).toString());
}
// FeatureIterators may be backed by a stream so this tidies
// things up.
features.close(reader);
} // end if
} // end for loop
}
/**
*
* @param features
* @param featureStylers
* @param layer
* @param order
* @throws IOException
* @throws IllegalAttributeException
*/
private void processStylersRaster(
final FeatureCollection<SimpleFeatureType, SimpleFeature> features,
final FeatureTypeStyle[] featureStylers, final MapLayer layer,
final int order) throws IOException, IllegalAttributeException {
startFolder("layer_" + order, layer.getTitle());
int layerCounter = order;
final int ftStylesLength = featureStylers.length;
for (int i = 0; i < ftStylesLength; i++) { // for each style
FeatureTypeStyle fts = featureStylers[i];
String typeName = features.getSchema().getTypeName();
if ((typeName != null)
&& (FeatureTypes.isDecendedFrom(features.getSchema(), null,
fts.getFeatureTypeName()) || typeName
.equalsIgnoreCase(fts.getFeatureTypeName()))) {
// get applicable rules at the current scale
Rule[] rules = fts.getRules();
List ruleList = new ArrayList();
List elseRuleList = new ArrayList();
populateRuleLists(rules, ruleList, elseRuleList, true);
if ((ruleList.size() == 0) && (elseRuleList.size() == 0)) {
return;
}
FeatureIterator<SimpleFeature> reader = features.features();
// we aren't going to iterate through the features because we
// just need to prepare
// the kml document for one feature; it is a raster result.
try {
if (!reader.hasNext()) {
continue; // no features, so move on
}
boolean doElse = true;
SimpleFeature feature = reader.next();
// applicable rules
for (Iterator it = ruleList.iterator(); it.hasNext();) {
Rule r = (Rule) it.next();
LOGGER.finer(new StringBuffer("applying rule: ")
.append(r.toString()).toString());
Filter filter = r.getFilter();
if ((filter == null) || filter.evaluate(feature)) {
doElse = false;
LOGGER.finer("processing raster-result Symobolizer ...");
Symbolizer[] symbolizers = r.getSymbolizers();
processRasterSymbolizers(feature, symbolizers,
order);
layerCounter++;
}
}
if (doElse) {
// rules with an else filter
LOGGER.finer("rules with an else filter");
for (Iterator it = elseRuleList.iterator(); it
.hasNext();) {
Rule r = (Rule) it.next();
Symbolizer[] symbolizers = r.getSymbolizers();
LOGGER.finer("processing raster-result Symobolizer ...");
processRasterSymbolizers(feature, symbolizers,
order);
layerCounter++;
}
}
} catch (Exception e) {
// that feature failed but others may still work
// REVISIT: don't like eating exceptions, even with a log.
LOGGER.warning(new StringBuffer(
"KML transform for feature failed ").append(
e.getMessage()).toString());
}
// FeatureIterators may be backed by a stream so this tidies
// things up.
features.close(reader);
} // end if
} // end for loop
endFolder(); // close the folder </Folder>
}
/**
* Sorts the rules into "If" rules and "Else" rules. The rules are sorted
* into their respective lists.
*
* @param rules
* @param ruleList
* @param elseRuleList
* @param ignoreScale
* ignore the scale denominator
*/
private void populateRuleLists(Rule[] rules, List ruleList,
List elseRuleList, boolean ignoreScale) {
final int rulesLength = rules.length;
for (int j = 0; j < rulesLength; j++) {
Rule r = rules[j];
if (ignoreScale) {
if (r.hasElseFilter()) {
elseRuleList.add(r);
} else {
ruleList.add(r);
}
} else {
if (isWithinScale(r)) {
if (r.hasElseFilter()) {
elseRuleList.add(r);
} else {
ruleList.add(r);
}
}
}
}
}
private void writeDescription(SimpleFeature feature,
final SimpleFeatureType schema) throws IOException {
if (mapContext.getRequest().getKMattr()) {
// descriptions are "templatable" by users, so see if there is a
// template available for use
GeoServerTemplateLoader templateLoader = new GeoServerTemplateLoader(
getClass());
templateLoader.setFeatureType(schema);
Template template = null;
// Configuration is not thread safe
synchronized (templateConfig) {
templateConfig.setTemplateLoader(templateLoader);
template = templateConfig.getTemplate("kmlDescription.ftl");
}
try {
template.setEncoding("UTF-8");
template.process(feature, this);
} catch (TemplateException e) {
String msg = "Error occured processing template.";
throw (IOException) new IOException(msg).initCause(e);
}
}
}
private void processVectorSymbolizers(final SimpleFeature feature,
final Symbolizer[] symbolizers, Range scaleRange,
StringBuffer featureLabel) throws IOException, TransformerException {
final int length = symbolizers.length;
// for each Symbolizer (text, polygon, line etc...)
for (int m = 0; m < length; m++) {
LOGGER.finer(new StringBuffer("applying symbolizer ").append(
symbolizers[m]).toString());
if (symbolizers[m] instanceof TextSymbolizer) {
TextSymbolizer ts = (TextSymbolizer) symbolizers[m];
Expression ex = ts.getLabel();
featureLabel.append((String) ex.evaluate(feature, String.class)); // attach
// the lable title
Style2D style = styleFactory.createStyle(feature,
symbolizers[m], scaleRange);
writeStyle(style, feature.getID(), symbolizers[m]);
} else { // all other symbolizers
Style2D style = styleFactory.createStyle(feature,
symbolizers[m], scaleRange);
writeStyle(style, feature.getID(), symbolizers[m]);
}
} // end for loop
}
/**
* Writes out the KML for a ground overlay. The image is processed later on.
*
* This will style the KML for raster output. There are no descriptions with
* vector output, as that would make the result really large (assuming that
* they chose raster output because a lot of features were requested).
*
*
* @param feature
* @param symbolizers
* @param order
* @throws IOException
* @throws TransformerException
*/
private void processRasterSymbolizers(final SimpleFeature feature,
final Symbolizer[] symbolizers, final int order)
throws IOException, TransformerException {
if (symbolizers.length < 1) {
return; // no symbolizers so return
}
LOGGER.finer("applying one symbolizer: " + symbolizers[0].toString());
com.vividsolutions.jts.geom.Envelope envelope = this.mapContext
.getRequest().getBbox();
write(new StringBuffer("<GroundOverlay>")
.append("<name>").append(feature.getID()).append("</name>")
.append("<drawOrder>").append(order).append("</drawOrder>")
.append("<Icon>").toString());
final double[] BBOX = new double[] { envelope.getMinX(),
envelope.getMinY(), envelope.getMaxX(), envelope.getMaxY() };
write(new StringBuffer("<href>layer_").append(order).append(".png</href>")
.append("<viewRefreshMode>never</viewRefreshMode>")
.append("<viewBoundScale>0.75</viewBoundScale>")
.append("</Icon>")
.append("<LatLonBox>")
.append("<north>").append(BBOX[3]).append("</north>")
.append("<south>").append(BBOX[1]).append("</south>")
.append("<east>").append(BBOX[2]).append("</east>")
.append("<west>").append(BBOX[0]).append("</west>")
.append("</LatLonBox>")
.append("</GroundOverlay>").toString());
}
/**
* Writes out the KML for a ground overlay. The image is processed later on.
*
* @param feature
* @param symbolizers
* @param order
* @throws IOException
* @throws TransformerException
*/
private void processRasterSymbolizersForCoverage(
final SimpleFeature feature, final Symbolizer[] symbolizers,
final MapLayer layer) throws IOException, TransformerException {
if (symbolizers.length < 1) {
return; // no symbolizers so return
}
LOGGER.finer("applying one symbolizer: " + symbolizers[0].toString());
final AbstractGridCoverage2DReader gcReader =
(AbstractGridCoverage2DReader) feature.getAttribute("grid");
// TODO add read parameters feature.getAttribute("params")
final HttpServletRequest request = this.mapContext.getRequest()
.getHttpServletRequest();
final String baseURL = org.vfny.geoserver.util.Requests.getBaseUrl(
request, null);
com.vividsolutions.jts.geom.Envelope envelope = this.mapContext
.getRequest().getBbox();
write(new StringBuffer("<GroundOverlay>").append("<name>").append(
feature.getID()).append("</name>").append("<Icon>").toString());
final double[] BBOX = new double[] { envelope.getMinX(),
envelope.getMinY(), envelope.getMaxX(), envelope.getMaxY() };
final StringBuffer getMapRequest = new StringBuffer(baseURL)
.append("wms?bbox=")
.append(BBOX[0])
.append(",")
.append(BBOX[1])
.append(",")
.append(BBOX[2])
.append(",")
.append(BBOX[3])
.append("&styles=")
.append(layer.getStyle().getName())
.append("&Format=image/png&request=GetMap&layers=")
.append(layer.getTitle())
.append("&width="+ this.mapContext.getMapWidth()
+ "&height="
+ this.mapContext.getMapHeight()
+ "&srs=EPSG:4326&transparent=true&");
write(new StringBuffer("<href>").append(getMapRequest).append("</href>")
.append("<viewRefreshMode>never</viewRefreshMode>")
.append("<viewBoundScale>0.75</viewBoundScale>")
.append("</Icon>")
.append("<LatLonBox>")
.append("<north>").append(BBOX[3]).append("</north>")
.append("<south>").append(BBOX[1]).append("</south>")
.append("<east>").append(BBOX[2]).append("</east>")
.append("<west>").append(BBOX[0]).append("</west>")
.append("</LatLonBox>")
.append("</GroundOverlay>").toString());
}
/**
* Applies each of a set of symbolizers in turn to a given feature.
* <p>
* This is an internal method and should only be called by processStylers.
* </p>
*
* The KML color tag: The order of expression is alpha, blue, green, red
* (ABGR). The range of values for any one color is 0 to 255 (00 to ff). For
* opacity, 00 is fully transparent and ff is fully opaque.
*
* @param feature
* The feature to be rendered
* @param symbolizers
* An array of symbolizers which actually perform the rendering.
* @param scaleRange
* The scale range we are working on... provided in order to make
* the style factory happy
*/
private boolean processSymbolizers(
final FeatureCollection<SimpleFeatureType, SimpleFeature> features,
final SimpleFeature feature, final Symbolizer[] symbolizers,
Range scaleRange, final MapLayer layer, final int order,
final int layerCounter, StringBuffer title, boolean vectorResult)
throws IOException, TransformerException {
boolean res = false;
// String title=null;
final int length = symbolizers.length;
// for each Symbolizer (text, polygon, line etc...)
for (int m = 0; m < length; m++) {
LOGGER.finer(new StringBuffer("applying symbolizer ").append(
symbolizers[m]).toString());
if (symbolizers[m] instanceof RasterSymbolizer) {
// LOGGER.info("Removed by bao for testing");
/*
* final GridCoverage gc = (GridCoverage)
* feature.getAttribute("grid"); final HttpServletRequest
* request =
* this.mapContext.getRequest().getHttpServletRequest(); final
* String baseURL =
* org.vfny.geoserver.util.Requests.getBaseUrl(request);
* com.vividsolutions.jts.geom.Envelope envelope =
* this.mapContext.getRequest().getBbox();
*/
/**
* EXAMPLE OUTPUT: <GroundOverlay> <name>Google Earth - New
* Image Overlay</name> <Icon>
* <href>http://localhost:8081/geoserver
* /wms?bbox=-130,24,-66,50&
* amp;styles=raster&Format=image/tiff
* &request=GetMap&
* ;layers=nurc:Img_Sample&width=550&
* ;height=250&srs=EPSG:4326&</href>
* <viewRefreshMode>never</viewRefreshMode>
* <viewBoundScale>0.75</viewBoundScale> </Icon> <LatLonBox>
* <north>50.0</north> <south>24.0</south> <east>-66.0</east>
* <west>-130.0</west> </LatLonBox> </GroundOverlay>
*/
/*
* write(new StringBuffer("<GroundOverlay>").
* append("<name>").append
* (((GridCoverage2D)gc).getName()).append("</name>").
* append("<drawOrder>").append(order).append("</drawOrder>").
* append("<Icon>").toString()); final double[] BBOX = new
* double[] { envelope.getMinX(), envelope.getMinY(),
* envelope.getMaxX(), envelope.getMaxY() }; if (layerCounter<0)
* { final StringBuffer getMapRequest = new
* StringBuffer(baseURL)
* .append("wms?bbox=").append(BBOX[0]).append(",").
* append(BBOX[
* 1]).append(",").append(BBOX[2]).append(",").append
* (BBOX[3]).append("&styles=").
* append(layer.getStyle().getName
* ()).append("&Format=image/png&request=GetMap&layers="
* ).
* append(layer.getTitle()).append("&width="+this.mapContext
* .getMapWidth()+"&height="+this.mapContext.getMapHeight()+
* "&srs=EPSG:4326&");
* write("<href>"+getMapRequest.toString()+"</href>"); } else {
* write("<href>layer_"+order+".png</href>"); } write(new
* StringBuffer("<viewRefreshMode>never</viewRefreshMode>").
* append("<viewBoundScale>0.75</viewBoundScale>").
* append("</Icon>"). append("<LatLonBox>").
* append("<north>").append(BBOX[3]).append("</north>").
* append("<south>").append(BBOX[1]).append("</south>").
* append("<east>").append(BBOX[2]).append("</east>").
* append("<west>").append(BBOX[0]).append("</west>").
* append("</LatLonBox>").
* append("</GroundOverlay>").toString()); //Geometry g =
* findGeometry(feature, symbolizers[m]);
* //writeRasterStyle(getMapRequest.toString(),
* feature.getID());
*/
res = true;
} else if (vectorResult) {
// TODO: come back and sort out crs transformation
// CoordinateReferenceSystem crs = findGeometryCS(feature,
// symbolizers[m]);
if (symbolizers[m] instanceof TextSymbolizer) {
TextSymbolizer ts = (TextSymbolizer) symbolizers[m];
Expression ex = ts.getLabel();
String value = (String) ex.evaluate(feature, String.class);
title.append(value);
Style2D style = styleFactory.createStyle(feature,
symbolizers[m], scaleRange);
writeStyle(style, feature.getID(), symbolizers[m]);
} else {
Style2D style = styleFactory.createStyle(feature,
symbolizers[m], scaleRange);
writeStyle(style, feature.getID(), symbolizers[m]);
}
} else if (!vectorResult) {
com.vividsolutions.jts.geom.Envelope envelope = this.mapContext
.getRequest().getBbox();
write(new StringBuffer("<GroundOverlay>").append("<name>")
.append(feature.getID()).append("</name>").append(
"<drawOrder>").append(order).append(
"</drawOrder>").append("<Icon>").toString());
final double[] BBOX = new double[] { envelope.getMinX(),
envelope.getMinY(), envelope.getMaxX(),
envelope.getMaxY() };
write(new StringBuffer("<href>layer_").append(order).append(".png</href>")
.append("<viewRefreshMode>never</viewRefreshMode>")
.append("<viewBoundScale>0.75</viewBoundScale>")
.append("</Icon>")
.append("<LatLonBox>")
.append("<north>").append(BBOX[3]).append("</north>")
.append("<south>").append(BBOX[1]).append("</south>")
.append("<east>").append(BBOX[2]).append("</east>")
.append("<west>").append(BBOX[0]).append("</west>")
.append("</LatLonBox>")
.append("</GroundOverlay>").toString());
} else {
LOGGER.info("KMZ processSymbolizerz unknown case. Please report error.");
}
}
return res;
}
/**
* Adds the <style> tag to the KML document.
*
* @param style
* @param id
* @throws IOException
*/
private void writeStyle(final Style2D style, final String id, Symbolizer sym)
throws IOException {
if (style instanceof PolygonStyle2D && sym instanceof PolygonSymbolizer) {
if ((((PolygonStyle2D) style).getFill() == null)
&& (((PolygonStyle2D) style).getStroke() == null)) {
LOGGER.info("Empty PolygonSymbolizer, using default fill and stroke.");
}
final StringBuffer styleString = new StringBuffer();
PolygonSymbolizer polySym = (PolygonSymbolizer) sym;
// ** LABEL **
styleString.append("<IconStyle>");
if (!mapContext.getRequest().getKMattr()) { // if they don't want
// attributes
styleString.append("<color>#00ffffff</color>"); // fully
// transparent
}
styleString.append("<Icon><href>root://icons/palette-3.png</href><x>224</x><w>32</w><h>32</h></Icon>");
styleString.append("</IconStyle>");
// ** FILL **
styleString.append("<PolyStyle><color>");
if (polySym.getFill() != null) // if they specified a fill
{
int opacity = 255; // default to full opacity
if (polySym.getFill().getOpacity() != null) {
float op = getOpacity(polySym.getFill().getOpacity());
opacity = (new Float(255 * op)).intValue();
}
Paint p = ((PolygonStyle2D) style).getFill();
if (p instanceof Color) {
styleString.append("#").append(intToHex(opacity)).append(
colorToHex((Color) p)); // transparancy needs to
// come from the opacity
// value.
} else {
styleString.append("#ffaaaaaa"); // should not occure in
// normal parsing
}
} else { // no fill specified, make transparent
styleString.append("#00aaaaaa");
}
// if there is an outline, specify that we have one, then style it
styleString.append("</color>");
if (polySym.getStroke() != null) {
styleString.append("<outline>1</outline>");
} else {
styleString.append("<outline>0</outline>");
}
styleString.append("</PolyStyle>");
// ** OUTLINE **
if (polySym.getStroke() != null) // if there is an outline
{
styleString.append("<LineStyle><color>");
int opacity = 255; // default to full opacity
if (polySym.getStroke().getOpacity() != null) {
float op = getOpacity(polySym.getStroke().getOpacity());
opacity = (new Float(255 * op)).intValue();
}
Paint p = ((PolygonStyle2D) style).getContour();
if (p instanceof Color) {
styleString.append("#").append(intToHex(opacity)).append(
colorToHex((Color) p)); // transparancy needs to
// come from the opacity
// value.
} else {
styleString.append("#ffaaaaaa"); // should not occure in
// normal parsing
}
styleString.append("</color>");
// stroke width
if (polySym.getStroke().getWidth() != null) {
int width = getWidth(polySym.getStroke().getWidth());
styleString.append("<width>").append(width).append(
"</width>");
}
styleString.append("</LineStyle>");
}
write(styleString.toString());
} else if (style instanceof LineStyle2D
&& sym instanceof LineSymbolizer) {
if (((LineStyle2D) style).getStroke() == null) {
LOGGER.info("Empty LineSymbolizer, using default stroke.");
}
LineSymbolizer lineSym = (LineSymbolizer) sym;
// ** LABEL **
final StringBuffer styleString = new StringBuffer();
styleString.append("<IconStyle>");
if (!mapContext.getRequest().getKMattr()) { // if they don't want
// attributes
styleString.append("<color>#00ffffff</color>"); // fully
// transparent
}
styleString.append("</IconStyle>");
// ** LINE **
styleString.append("<LineStyle><color>");
if (lineSym.getStroke() != null) {
int opacity = 255;
if (lineSym.getStroke().getOpacity() != null) {
float op = getOpacity(lineSym.getStroke().getOpacity());
opacity = (new Float(255 * op)).intValue();
}
Paint p = ((LineStyle2D) style).getContour();
if (p instanceof Color) {
styleString.append("#").append(intToHex(opacity)).append(
colorToHex((Color) p)); // transparancy needs to
// come from the opacity
// value.
} else {
styleString.append("#ffaaaaaa"); // should not occure in
// normal parsing
}
styleString.append("</color>");
// stroke width
if (lineSym.getStroke().getWidth() != null) {
int width = getWidth(lineSym.getStroke().getWidth());
styleString.append("<width>").append(width).append(
"</width>");
}
} else // no style defined, so use default
{
styleString.append("#ffaaaaaa");
styleString.append("</color><width>1</width>");
}
styleString.append("</LineStyle>");
write(styleString.toString());
} else if (style instanceof TextStyle2D
&& sym instanceof TextSymbolizer) {
final StringBuffer styleString = new StringBuffer();
TextSymbolizer textSym = (TextSymbolizer) sym;
styleString.append("<LabelStyle><color>");
if (textSym.getFill() != null) {
int opacity = 255;
if (textSym.getFill().getOpacity() != null) {
float op = getOpacity(textSym.getFill().getOpacity());
opacity = (new Float(255 * op)).intValue();
}
Paint p = ((TextStyle2D) style).getFill();
if (p instanceof Color) {
styleString.append("#").append(intToHex(opacity)).append(
colorToHex((Color) p));
// transparancy needs to come from the opacity value.
} else {
styleString.append("#ffaaaaaa"); // should not occure in
// normal parsing
}
styleString.append("</color></LabelStyle>");
} else {
styleString.append("#ffaaaaaa");
styleString.append("</color></LabelStyle>");
}
write(styleString.toString());
} else if (style instanceof MarkStyle2D
&& sym instanceof PointSymbolizer) {
// we can sorta style points. Just with color however.
final StringBuffer styleString = new StringBuffer();
PointSymbolizer pointSym = (PointSymbolizer) sym;
styleString.append("<IconStyle><color>");
if ((pointSym.getGraphic() != null)
&& (pointSym.getGraphic().getMarks() != null)) {
Mark[] marks = pointSym.getGraphic().getMarks();
if ((marks.length > 0) && (marks[0] != null)) {
Mark mark = marks[0];
int opacity = 255;
if (mark.getFill().getOpacity() != null) {
float op = getOpacity(mark.getFill().getOpacity());
opacity = (new Float(255 * op)).intValue();
}
Paint p = ((MarkStyle2D) style).getFill();
if (p instanceof Color) {
styleString.append("#").append(intToHex(opacity))
.append(colorToHex((Color) p));
// transparancy needs to comefrom the opacity value.
} else {
styleString.append("#ffaaaaaa"); // should not occure
// in normal parsing
}
} else {
styleString.append("#ffaaaaaa");
}
} else {
styleString.append("#ffaaaaaa");
}
styleString.append("</color>");
styleString.append("<colorMode>normal</colorMode>");
styleString.append("<Icon><href>root://icons/palette-4.png</href>");
styleString.append("<x>32</x><y>128</y><w>32</w><h>32</h></Icon>");
styleString.append("</IconStyle>");
write(styleString.toString());
}
}
/**
* @param href
* @param id
* @throws IOException
*/
private void writeRasterStyle(final String href, final String id)
throws IOException {
final StringBuffer styleString = new StringBuffer();
styleString.append("<Style id=\"GeoServerStyle").append(id).append(
"\">");
styleString.append("<IconStyle><Icon><href>").append(href).append(
"</href><viewRefreshMode>never</viewRefreshMode>").append(
"<viewBoundScale>0.75</viewBoundScale><w>").append(
this.mapContext.getMapWidth()).append("</w><h>").append(
this.mapContext.getMapHeight()).append(
"</h></Icon></IconStyle>");
styleString
.append("<PolyStyle><fill>0</fill><outline>0</outline></PolyStyle>");
styleString.append("</Style>");
write(styleString.toString());
}
private boolean isWithinScale(Rule r) {
double min = r.getMinScaleDenominator();
double max = r.getMaxScaleDenominator();
if (((min - TOLERANCE) <= scaleDenominator)
&& ((max + TOLERANCE) >= scaleDenominator)) {
return true;
} else {
return false;
}
}
/**
* Finds the geometric attribute requested by the symbolizer
*
* @param f
* The feature
* @param s
* The symbolizer
* @return The geometry requested in the symbolizer, or the default geometry
* if none is specified
*/
private com.vividsolutions.jts.geom.Geometry findGeometry(SimpleFeature f,
Symbolizer s) {
String geomName = getGeometryPropertyName(s);
// get the geometry
Geometry geom;
if (geomName == null) {
geom = (Geometry) f.getDefaultGeometry();
} else {
geom = (com.vividsolutions.jts.geom.Geometry) f
.getAttribute(geomName);
}
// if the symbolizer is a point symbolizer generate a suitable location
// to place the
// point in order to avoid recomputing that location at each rendering
// step
if (s instanceof PointSymbolizer) {
geom = getCentroid(geom); // djb: major simpificatioN
}
return geom;
}
/**
* Returns the default geometry in the feature.
*
* @param f
* feature to find the geometry in
* @return
*/
private com.vividsolutions.jts.geom.Geometry findGeometry(SimpleFeature f) {
// get the geometry
Geometry geom = (Geometry) f.getDefaultGeometry();
// CoordinateReferenceSystem sourceCRS =
// f.getFeatureType().getDefaultGeometry().getCoordinateSystem();
if (!CRS.equalsIgnoreMetadata(sourceCrs, this.mapContext
.getCoordinateReferenceSystem())) {
try {
MathTransform transform = CRS.findMathTransform(sourceCrs,
this.mapContext.getCoordinateReferenceSystem(), true);
geom = JTS.transform(geom, transform);
} catch (MismatchedDimensionException e) {
LOGGER.severe(e.getLocalizedMessage());
} catch (TransformException e) {
LOGGER.severe(e.getLocalizedMessage());
} catch (FactoryException e) {
LOGGER.severe(e.getLocalizedMessage());
}
}
return geom;
}
/**
* Finds the centroid of the input geometry if input = point, line, polygon
* --> return a point that represents the centroid of that geom if input =
* geometry collection --> return a multipoint that represents the centoid
* of each sub-geom
*
* @param g
* @return
*/
public Geometry getCentroid(Geometry g) {
if (g instanceof GeometryCollection) {
GeometryCollection gc = (GeometryCollection) g;
Coordinate[] pts = new Coordinate[gc.getNumGeometries()];
for (int t = 0; t < gc.getNumGeometries(); t++) {
pts[t] = gc.getGeometryN(t).getCentroid().getCoordinate();
}
return g.getFactory().createMultiPoint(pts);
} else {
return g.getCentroid();
}
}
/**
* Finds the geometric attribute coordinate reference system
*
* @param f
* The feature
* @param s
* The symbolizer
* @return The geometry requested in the symbolizer, or the default geometry
* if none is specified
*/
private org.opengis.referencing.crs.CoordinateReferenceSystem findGeometryCS(
SimpleFeature f, Symbolizer s) {
String geomName = getGeometryPropertyName(s);
if (geomName != null) {
return ((GeometryDescriptor) f.getFeatureType().getDescriptor(
geomName)).getCoordinateReferenceSystem();
} else {
return f.getFeatureType().getCoordinateReferenceSystem();
}
}
/**
* Utility method to find which geometry property is referenced by a given
* symbolizer.
*
* @param s
* The symbolizer
* @TODO: this is c&p from lite renderer code as the method was private
* consider moving to a public unility class.
*/
private String getGeometryPropertyName(Symbolizer s) {
String geomName = null;
// TODO: fix the styles, the getGeometryPropertyName should probably be
// moved into an
// interface...
if (s instanceof PolygonSymbolizer) {
geomName = ((PolygonSymbolizer) s).getGeometryPropertyName();
} else if (s instanceof PointSymbolizer) {
geomName = ((PointSymbolizer) s).getGeometryPropertyName();
} else if (s instanceof LineSymbolizer) {
geomName = ((LineSymbolizer) s).getGeometryPropertyName();
} else if (s instanceof TextSymbolizer) {
geomName = ((TextSymbolizer) s).getGeometryPropertyName();
}
return geomName;
}
/**
* Utility method to convert an int into hex, padded to two characters.
* handy for generating colour strings.
*
* @param i
* Int to convert
* @return String a two character hex representation of i NOTE: this is a
* utility method and should be put somewhere more useful.
*/
protected static String intToHex(int i) {
String prelim = Integer.toHexString(i);
if (prelim.length() < 2) {
prelim = "0" + prelim;
}
return prelim;
}
/**
* Utility method to convert a Color into a KML color ref
*
* @param c
* The color to convert
* @return A string in BBGGRR format - note alpha must be prefixed seperatly
* before use.
*/
private String colorToHex(Color c) {
return intToHex(c.getBlue()) + intToHex(c.getGreen())
+ intToHex(c.getRed());
}
/**
* Borrowed from StreamingRenderer
*
* @param sym
* @return
*/
private float getOpacity(final Symbolizer sym) {
float alpha = 1.0f;
Expression exp = null;
if (sym instanceof PolygonSymbolizer) {
exp = ((PolygonSymbolizer) sym).getFill().getOpacity();
} else if (sym instanceof LineSymbolizer) {
exp = ((LineSymbolizer) sym).getStroke().getOpacity();
} else if (sym instanceof PointSymbolizer) {
exp = ((PointSymbolizer) sym).getGraphic().getOpacity();
} else if (sym instanceof TextSymbolizer) {
exp = ((TextSymbolizer) sym).getFill().getOpacity();
} else {
LOGGER.info("Symbolizer not matched; was of class: " + sym);
}
if (exp == null) {
LOGGER.info("Could not determine proper symbolizer opacity.");
return alpha;
}
Float number = (Float) exp.evaluate(null, Float.class);
if (number == null) {
return alpha;
}
return number.floatValue();
}
private float getOpacity(final Expression exp) {
float alpha = 1.0f;
Float number = (Float) exp.evaluate(null, Float.class);
if (number == null) {
return alpha;
}
return number.floatValue();
}
private int getWidth(final Expression exp) {
int defaultWidth = 1;
Integer number = (Integer) exp.evaluate(null, Integer.class);
if (number == null) {
return defaultWidth;
}
return number.intValue();
}
}