/**
* This transforms all external graphics references that are relative to absolute. This is a
* workaround to be able to visualize png and svg in relative mode, which doesn't work right now
* in geotools. See: http://jira.codehaus.org/browse/GEOT-3235
*
* <p>This will not be necessary any more as soon as the geotools bug is fixed.
*
* @param relatedFile the related shapefile.
* @param style the style to check.
*/
private void makeGraphicsAbsolute(File relatedFile, Style style) {
File parentFolder = relatedFile.getParentFile();
Rule[] rules = SLDs.rules(style);
for (Rule rule : rules) {
Symbolizer[] onlineResource = rule.getSymbolizers();
for (Symbolizer symbolizer : onlineResource) {
if (symbolizer instanceof PointSymbolizer) {
PointSymbolizer pointSymbolizer = (PointSymbolizer) symbolizer;
Graphic graphic = SLDs.graphic(pointSymbolizer);
List<GraphicalSymbol> graphicalSymbols = graphic.graphicalSymbols();
for (GraphicalSymbol graphicalSymbol : graphicalSymbols) {
if (graphicalSymbol instanceof ExternalGraphic) {
ExternalGraphic externalGraphic = (ExternalGraphic) graphicalSymbol;
try {
URL location = externalGraphic.getLocation();
File urlToFile = URLUtils.urlToFile(location);
if (urlToFile != null && !urlToFile.exists()) {
File newFile = new File(parentFolder, urlToFile.getPath());
if (newFile.exists()) {
externalGraphic.setLocation(newFile.toURI().toURL());
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
}
}
}
}
}
public Object[] getChildren(Object parentElement) {
if (parentElement == null) return EMPTY_ARRAY;
if (parentElement instanceof Style) {
Style style = (Style) parentElement;
Rule[] rule = SLDs.rules(style);
return rule; // return rules
} else if (parentElement instanceof FeatureTypeStyle) {
FeatureTypeStyle fts = (FeatureTypeStyle) parentElement;
List<Rule> rules = fts.rules();
Rule[] rulesArray = (Rule[]) rules.toArray(new Rule[rules.size()]);
return rulesArray;
}
return EMPTY_ARRAY;
}
