/* (c) 2014 Open Source Geospatial Foundation - all rights reserved
* (c) 2001 - 2013 OpenPlans
* This code is licensed under the GPL 2.0 license, available at the root
* application directory.
*/
package org.geoserver.wms;
import java.util.ArrayList;
import java.util.List;
import org.geotools.styling.Graphic;
import org.geotools.styling.PointSymbolizer;
import org.geotools.styling.Rule;
import org.geotools.styling.StyleFactoryImpl;
import org.geotools.styling.Symbolizer;
import org.geotools.styling.visitor.DuplicatingStyleVisitor;
import org.opengis.filter.Filter;
import org.opengis.style.Description;
/**
* Base class for style visitors that copies styles but removes certain symbolizers
*
* @author Andrea Aime - OpenGeo
*/
public abstract class SymbolizerFilteringVisitor extends DuplicatingStyleVisitor {
public void visit(Rule rule) {
Rule copy = null;
Filter filterCopy = null;
if (rule.getFilter() != null) {
Filter filter = rule.getFilter();
filterCopy = copy(filter);
}
// modified to deal with null copies that should be skipped
List<Symbolizer> symArray = new ArrayList<Symbolizer>();
for (Symbolizer sym : rule.symbolizers()) {
Symbolizer symcopy = copy(sym);
if (symcopy != null)
symArray.add(symcopy);
}
Symbolizer[] symsCopy = (Symbolizer[]) symArray.toArray(new Symbolizer[symArray.size()]);
Graphic[] legendCopy = rule.getLegendGraphic();
for (int i = 0; i < legendCopy.length; i++) {
legendCopy[i] = copy(legendCopy[i]);
}
Description descCopy = rule.getDescription();
descCopy = copy(descCopy);
copy = new StyleFactoryImpl().createRule(symsCopy, descCopy, legendCopy, rule.getName(),
filterCopy, rule.isElseFilter(), rule.getMaxScaleDenominator(), rule
.getMinScaleDenominator());
if (STRICT && !copy.equals(rule)) {
throw new IllegalStateException("Was unable to duplicate provided Rule:" + rule);
}
pages.push(copy);
}
}