public void testMin() throws Exception {
FilterFactory ff = dataStore.getFilterFactory();
PropertyName p = ff.property(aname("doubleProperty"));
MinVisitor v = new MyMinVisitor(p);
dataStore.getFeatureSource(tname("ft1")).accepts(Query.ALL, v, null);
assertFalse(visited);
assertEquals(0.0, v.getResult().toDouble(), 0.01);
}
public void testMinWithFilter() throws Exception {
FilterFactory ff = dataStore.getFilterFactory();
PropertyName p = ff.property(aname("doubleProperty"));
MinVisitor v = new MyMinVisitor(p);
Filter f = ff.greater(ff.property(aname("doubleProperty")), ff.literal(1));
Query q = new DefaultQuery(tname("ft1"), f);
dataStore.getFeatureSource(tname("ft1")).accepts(q, v, null);
assertFalse(visited);
assertEquals(1.1, v.getResult().toDouble(), 0.01);
}
public void testMinWithLimitOffset() throws Exception {
if (!dataStore.getSQLDialect().isLimitOffsetSupported()) {
return;
}
FilterFactory ff = dataStore.getFilterFactory();
PropertyName p = ff.property(aname("doubleProperty"));
MinVisitor v = new MyMinVisitor(p);
DefaultQuery q = new DefaultQuery(tname("ft1"));
q.setStartIndex(0);
q.setMaxFeatures(2);
dataStore.getFeatureSource(tname("ft1")).accepts(q, v, null);
assertFalse(visited);
assertEquals(0.0, v.getResult().toDouble(), 0.01);
}
/**
* Collects features domain to be exposed as metadata
*
* @param filePath
* @param aggregate
* @param firstFeature
* @return
*/
private Map<String, Object> computeGroupMetadata(
String filePath, boolean aggregate, SimpleFeature firstFeature) {
Map<String, Object> metadataMap = null;
List<DimensionDescriptor> dimensionDescriptors = rasterManager.getDimensionDescriptors();
// extract metadata for the available domains
if (dimensionDescriptors != null && !dimensionDescriptors.isEmpty()) {
Filter filter = FF.equals(FF.property("location"), FF.literal(filePath));
metadataMap = new HashMap<String, Object>();
try {
// scan dimensions
for (DimensionDescriptor descriptor : dimensionDescriptors) {
String attribute = descriptor.getStartAttribute();
String name = descriptor.getName();
Comparable max = null;
Comparable min = null;
if (aggregate) {
Query query = new Query(typeName);
query.setFilter(filter);
query.setPropertyNames(Arrays.asList(attribute));
// Repeat the queries to avoid using a in-Memory
// featureCollection
// We may consider caching the features in case
// the collection size isn't too big
final MaxVisitor maxVisitor = new MaxVisitor(attribute);
granuleCatalog.computeAggregateFunction(query, maxVisitor);
max = maxVisitor.getMax();
MinVisitor minVisitor = new MinVisitor(attribute);
granuleCatalog.computeAggregateFunction(query, minVisitor);
min = minVisitor.getMin();
} else {
max = min = (Comparable) firstFeature.getAttribute(attribute);
}
addMetadaElement(name, min, max, metadataMap);
}
addBBOX(aggregate, filter, firstFeature, metadataMap);
} catch (IOException e) {
throw new RuntimeException("Exception occurred while parsing the feature domains", e);
}
}
return metadataMap;
}
/**
* Returns the list of elevation values for the specified typeInfo based on the dimension
* representation: all values for {@link DimensionPresentation#LIST}, otherwise min and max
*
* @param typeInfo
* @return
* @throws IOException
*/
public TreeSet<Double> getFeatureTypeElevations(FeatureTypeInfo typeInfo) throws IOException {
// grab the time metadata
DimensionInfo elevation =
typeInfo.getMetadata().get(ResourceInfo.ELEVATION, DimensionInfo.class);
if (elevation == null || !elevation.isEnabled()) {
throw new ServiceException(
"Layer " + typeInfo.getPrefixedName() + " does not have elevation support enabled");
}
FeatureCollection collection = getDimensionCollection(typeInfo, elevation);
TreeSet<Double> result = new TreeSet<Double>();
if (elevation.getPresentation() == DimensionPresentation.LIST
|| (elevation.getPresentation() == DimensionPresentation.DISCRETE_INTERVAL
&& elevation.getResolution() == null)) {
final UniqueVisitor visitor = new UniqueVisitor(elevation.getAttribute());
collection.accepts(visitor, null);
@SuppressWarnings("unchecked")
Set<Object> values = visitor.getUnique();
if (values.size() <= 0) {
result = null;
} else {
for (Object value : values) {
result.add(((Number) value).doubleValue());
}
}
} else {
final MinVisitor min = new MinVisitor(elevation.getAttribute());
collection.accepts(min, null);
// check calcresult first to avoid potential IllegalStateException if no features are in
// collection
CalcResult calcResult = min.getResult();
if (calcResult != CalcResult.NULL_RESULT) {
result.add(((Number) min.getMin()).doubleValue());
final MaxVisitor max = new MaxVisitor(elevation.getAttribute());
collection.accepts(max, null);
result.add(((Number) max.getMax()).doubleValue());
}
}
return result;
}
/**
* Returns the list of time values for the specified typeInfo based on the dimension
* representation: all values for {@link DimensionPresentation#LIST}, otherwise min and max
*
* @param typeInfo
* @return
* @throws IOException
*/
public TreeSet<Date> getFeatureTypeTimes(FeatureTypeInfo typeInfo) throws IOException {
// grab the time metadata
DimensionInfo time = typeInfo.getMetadata().get(ResourceInfo.TIME, DimensionInfo.class);
if (time == null || !time.isEnabled()) {
throw new ServiceException(
"Layer " + typeInfo.getPrefixedName() + " does not have time support enabled");
}
FeatureCollection collection = getDimensionCollection(typeInfo, time);
TreeSet<Date> result = new TreeSet<Date>();
if (time.getPresentation() == DimensionPresentation.LIST) {
final UniqueVisitor visitor = new UniqueVisitor(time.getAttribute());
collection.accepts(visitor, null);
@SuppressWarnings("unchecked")
Set<Date> values = visitor.getUnique();
if (values.size() <= 0) {
result = null;
} else {
// we might get null values out of the visitor, strip them
values.remove(null);
result.addAll(values);
}
} else {
final MinVisitor min = new MinVisitor(time.getAttribute());
collection.accepts(min, null);
CalcResult minResult = min.getResult();
// check calcresult first to avoid potential IllegalStateException if no features are in
// collection
if (minResult != CalcResult.NULL_RESULT) {
result.add((Date) min.getMin());
final MaxVisitor max = new MaxVisitor(time.getAttribute());
collection.accepts(max, null);
result.add((Date) max.getMax());
}
}
return result;
}
/**
* Calculate minimum (using FeatureCalc) - only one parameter is used.
*
* @param collection collection to calculate the minimum
* @param expression Single Expression argument
* @return An object containing the minimum value of the attributes
* @throws IllegalFilterException
* @throws IOException
*/
static CalcResult calculateMin(SimpleFeatureCollection collection, Expression expression)
throws IllegalFilterException, IOException {
MinVisitor minVisitor = new MinVisitor(expression);
collection.accepts(minVisitor, null);
return minVisitor.getResult();
}
public void visit(SimpleFeature feature) {
super.visit(feature);
visited = true;
}