/**
* Loads the feature collection based on the current styling and the scale denominator. If no
* feature is going to be returned a null feature collection will be returned instead
*
* @param featureSource
* @param layer
* @param mapContent
* @param wms
* @param scaleDenominator
* @return
* @throws Exception
*/
public static SimpleFeatureCollection loadFeatureCollection(
SimpleFeatureSource featureSource,
Layer layer,
WMSMapContent mapContent,
WMS wms,
double scaleDenominator)
throws Exception {
SimpleFeatureType schema = featureSource.getSchema();
Envelope envelope = mapContent.getRenderingArea();
ReferencedEnvelope aoi =
new ReferencedEnvelope(envelope, mapContent.getCoordinateReferenceSystem());
CoordinateReferenceSystem sourceCrs = schema.getCoordinateReferenceSystem();
boolean reprojectBBox =
(sourceCrs != null)
&& !CRS.equalsIgnoreMetadata(aoi.getCoordinateReferenceSystem(), sourceCrs);
if (reprojectBBox) {
aoi = aoi.transform(sourceCrs, true);
}
Filter filter = createBBoxFilter(schema, aoi);
// now build the query using only the attributes and the bounding
// box needed
Query q = new Query(schema.getTypeName());
q.setFilter(filter);
// now, if a definition query has been established for this layer,
// be sure to respect it by combining it with the bounding box one.
Query definitionQuery = layer.getQuery();
if (definitionQuery != Query.ALL) {
if (q == Query.ALL) {
q = (Query) definitionQuery;
} else {
q = (Query) DataUtilities.mixQueries(definitionQuery, q, "KMLEncoder");
}
}
// handle startIndex requested by client query
q.setStartIndex(definitionQuery.getStartIndex());
// check the regionating strategy
RegionatingStrategy regionatingStrategy = null;
String stratname = (String) mapContent.getRequest().getFormatOptions().get("regionateBy");
if (("auto").equals(stratname)) {
Catalog catalog = wms.getGeoServer().getCatalog();
Name name = layer.getFeatureSource().getName();
stratname =
catalog
.getFeatureTypeByName(name)
.getMetadata()
.get("kml.regionateStrategy", String.class);
if (stratname == null || "".equals(stratname)) {
stratname = "best_guess";
LOGGER.log(
Level.FINE,
"No default regionating strategy has been configured in "
+ name
+ "; using automatic best-guess strategy.");
}
}
if (stratname != null) {
regionatingStrategy = findStrategyByName(stratname);
// if a strategy was specified but we did not find it, let the user
// know
if (regionatingStrategy == null)
throw new ServiceException("Unknown regionating strategy " + stratname);
}
// try to load less features by leveraging regionating strategy and the
// SLD
Filter regionatingFilter = Filter.INCLUDE;
if (regionatingStrategy != null)
regionatingFilter = regionatingStrategy.getFilter(mapContent, layer);
Filter ruleFilter =
summarizeRuleFilters(
getLayerRules(featureSource.getSchema(), layer.getStyle()), scaleDenominator);
Filter finalFilter = joinFilters(q.getFilter(), ruleFilter, regionatingFilter);
if (finalFilter == Filter.EXCLUDE) {
// if we don't have any feature to return
return null;
}
q.setFilter(finalFilter);
// make sure we output in 4326 since that's what KML mandates
CoordinateReferenceSystem wgs84;
try {
wgs84 = CRS.decode("EPSG:4326");
} catch (Exception e) {
throw new RuntimeException(
"Cannot decode EPSG:4326, the CRS subsystem must be badly broken...");
}
if (sourceCrs != null && !CRS.equalsIgnoreMetadata(wgs84, sourceCrs)) {
return new ReprojectFeatureResults(featureSource.getFeatures(q), wgs84);
}
return featureSource.getFeatures(q);
}
/**
* Encodes the url of a GetMap request from a map context + map layer.
*
* <p>If the <tt>Layer</tt> argument is <code>null</code>, the request is made including all
* layers in the <tt>mapContexT</tt>.
*
* @param mapContent The map context.
* @param layer The Map layer, may be <code>null</code>
* @param layerIndex The index of the layer in the request.
* @param kvp Additional or overidding kvp parameters, may be <code>null</code>
* @param tile Flag controlling wether the request should be made against tile cache
* @param geoserver
* @return The full url for a getMap request.
* @deprecated use {@link WMSRequests#getGetMapUrl(WMSMapContent, Layer, int, Envelope, String[])}
*/
public static String getMapUrl(
WMSMapContent mapContent, Layer layer, int layerIndex, boolean tile, GeoServer geoserver) {
return getMapUrl(
mapContent, layer, layerIndex, mapContent.getRenderingArea(), null, tile, geoserver);
}
