/**
* @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 Envelope getBbox() {
if (super.getBbox() != null) {
return super.getBbox();
}
if (datastore == null || !datastore.isAvailable()) {
return null;
}
// always use up-to-date envelope
Envelope bbox = null;
AppSchema schema = datastore.getSchema();
List<Style> styles = service.registry.getAll(getName());
List<QName> ftNames = new LinkedList<QName>();
for (Style s : styles) {
if (s.getFeatureType() != null) {
ftNames.add(s.getFeatureType());
}
}
if (ftNames.isEmpty()) {
for (FeatureType t : schema.getFeatureTypes(null, false, false)) {
ftNames.add(t.getName());
}
}
for (QName t : ftNames) {
Envelope thisBox = null;
try {
thisBox = datastore.getEnvelope(t);
} catch (FeatureStoreException e) {
LOG.error("Error retrieving envelope from FeatureStore: " + e.getMessage(), e);
}
if (bbox == null) {
bbox = thisBox;
} else {
if (thisBox != null) {
bbox = bbox.merge(thisBox);
}
}
}
return bbox;
}
@Override
public Pair<FeatureCollection, LinkedList<String>> getFeatures(
final GetFeatureInfo fi, Style style) throws MissingDimensionValue, InvalidDimensionValue {
try {
final Pair<Filter, LinkedList<String>> dimFilter = getDimensionFilter(fi.getDimensions());
final Envelope clickBox = fi.getClickBox();
OperatorFilter filter = dimFilter == null ? null : (OperatorFilter) dimFilter.first;
if (filter == null) {
double scale =
calcScaleWMS130(
fi.getWidth(),
fi.getHeight(),
fi.getEnvelope(),
fi.getCoordinateSystem(),
DEFAULT_PIXEL_SIZE);
filter = getStyleFilters(style, scale);
} else {
double scale =
calcScaleWMS130(
fi.getWidth(),
fi.getHeight(),
fi.getEnvelope(),
fi.getCoordinateSystem(),
DEFAULT_PIXEL_SIZE);
OperatorFilter f = getStyleFilters(style, scale);
if (f != null) {
filter = new OperatorFilter(new And(filter.getOperator(), f.getOperator()));
}
}
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 Operator operator = filter == null ? null : filter.getOperator();
QName featureType = style == null ? null : style.getFeatureType();
LOG.debug("Querying the feature store(s)...");
FeatureCollection col;
if (featureType == null) {
List<Query> queries =
map(
datastore.getSchema().getFeatureTypes(null, false, false),
new Mapper<Query, FeatureType>() {
@Override
public Query apply(FeatureType u) {
return new Query(
u.getName(),
buildFilter(operator, u, clickBox, geomProp),
-1,
fi.getFeatureCount(),
-1);
}
});
clearNulls(queries);
col = clearDuplicates(datastore.query(queries.toArray(new Query[queries.size()])));
} else {
FeatureType ft = datastore.getSchema().getFeatureType(featureType);
Query query =
new Query(
featureType,
buildFilter(operator, ft, clickBox, geomProp),
-1,
fi.getFeatureCount(),
-1);
col = clearDuplicates(datastore.query(query));
}
LOG.debug("Finished querying the feature store(s).");
return new Pair<FeatureCollection, LinkedList<String>>(
col, dimFilter == null ? new LinkedList<String>() : dimFilter.second);
} 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);
}
return new Pair<FeatureCollection, LinkedList<String>>(null, new LinkedList<String>());
}