/**
* @param style
* @param gm
* @param queries
* @return a list of dimension warnings
* @throws MissingDimensionValue
* @throws InvalidDimensionValue
*/
public LinkedList<String> collectQueries(Style style, final GetMap gm, LinkedList<Query> queries)
throws MissingDimensionValue, InvalidDimensionValue {
final Envelope bbox = gm.getBoundingBox();
Set<Expression> exprs = new HashSet<Expression>();
final ValueReference geomProp;
exprs.addAll(Styles.getGeometryExpressions(style));
if (exprs.size() == 1 && exprs.iterator().next() instanceof ValueReference) {
geomProp = (ValueReference) exprs.iterator().next();
} else {
geomProp = null;
}
final Pair<Filter, LinkedList<String>> dimFilter = getDimensionFilter(gm.getDimensions());
final Filter filter =
gm.getFilterForLayer(this.getName(), dimFilter == null ? null : dimFilter.first, style);
if (style != null) {
QName ftName = style.getFeatureType();
if (ftName != null && datastore.getSchema().getFeatureType(ftName) == null) {
LOG.warn("FeatureType '" + ftName + "' from style is not known to the FeatureStore.");
return new LinkedList<String>();
}
}
QName featureType = style == null ? null : style.getFeatureType();
final int maxFeatures = gm.getRenderingOptions().getMaxFeatures(getName());
if (featureType == null && datastore != null) {
queries.addAll(
map(
datastore.getSchema().getFeatureTypes(null, false, false),
new Mapper<Query, FeatureType>() {
@Override
public Query apply(FeatureType u) {
Filter fil = Filters.addBBoxConstraint(bbox, filter, geomProp);
return new Query(
u.getName(), fil, round(gm.getScale()), maxFeatures, gm.getResolution());
}
}));
} else {
Query query =
new Query(
featureType,
Filters.addBBoxConstraint(bbox, filter, geomProp),
round(gm.getScale()),
maxFeatures,
gm.getResolution());
queries.add(query);
}
return dimFilter == null ? new LinkedList<String>() : dimFilter.second;
}
@Override
public LinkedList<String> paintMap(Graphics2D g, GetMap gm, Style style)
throws MissingDimensionValue, InvalidDimensionValue {
LinkedList<Query> queries = new LinkedList<Query>();
LinkedList<String> warnings = collectQueries(style, gm, queries);
Java2DRenderer renderer =
new Java2DRenderer(
g, gm.getWidth(), gm.getHeight(), gm.getBoundingBox(), gm.getPixelSize());
Java2DTextRenderer textRenderer = new Java2DTextRenderer(renderer);
// TODO
@SuppressWarnings({"rawtypes", "unchecked"})
XPathEvaluator<Feature> evaluator = (XPathEvaluator) new TypedObjectNodeXPathEvaluator();
if (queries.isEmpty()) {
LOG.warn("No queries were generated. Is the configuration correct?");
return warnings;
}
FeatureInputStream rs = null;
try {
rs = datastore.query(queries.toArray(new Query[queries.size()]));
// TODO Should this always be done on this level? What about min and maxFill values?
rs = new ThreadedFeatureInputStream(rs, 100, 20);
int max = gm.getRenderingOptions().getMaxFeatures(getName());
int cnt = 0;
double resolution = gm.getResolution();
// TODO get rid of resolution handling on this code level completely
// if ( !gm.getCoordinateSystem().equals( datastore.getStorageSRS() ) ) {
// try {
// Envelope b = new GeometryTransformer( datastore.getStorageSRS() ).transform(
// gm.getBoundingBox() );
// resolution = Utils.calcResolution( b, gm.getWidth(), gm.getHeight() );
// } catch ( IllegalArgumentException e ) {
// LOG.warn( "Calculating the resolution failed: '{}'", e.getLocalizedMessage() );
// LOG.trace( "Stack trace:", e );
// } catch ( TransformationException e ) {
// LOG.warn( "Calculating the resolution failed: '{}'", e.getLocalizedMessage() );
// LOG.trace( "Stack trace:", e );
// } catch ( UnknownCRSException e ) {
// LOG.warn( "Calculating the resolution failed: '{}'", e.getLocalizedMessage() );
// LOG.trace( "Stack trace:", e );
// }
// }
for (Feature f : rs) {
try {
render(f, evaluator, style, renderer, textRenderer, gm.getScale(), resolution);
} catch (IllegalArgumentException e) {
LOG.warn("Unable to render feature, probably a curve had multiple/non-linear segments.");
LOG.warn("Error message was: {}", e.getLocalizedMessage());
LOG.trace("Stack trace:", e);
}
if (max > 0 && ++cnt == max) {
LOG.debug("Reached max features of {} for layer '{}', stopping.", max, this);
break;
}
}
} catch (FilterEvaluationException e) {
LOG.warn("A filter could not be evaluated. The error was '{}'.", e.getLocalizedMessage());
LOG.trace("Stack trace:", e);
} catch (FeatureStoreException e) {
LOG.warn(
"Data could not be fetched from the feature store. The error was '{}'.",
e.getLocalizedMessage());
LOG.trace("Stack trace:", e);
} finally {
if (rs != null) {
rs.close();
}
}
return warnings;
}