public static Filter reformatFilter(Filter filter, SimpleFeatureType ft) throws Exception {
FilterFactory2 ff = CommonFactoryFinder.getFilterFactory2();
if (Filter.INCLUDE.equals(filter) || Filter.EXCLUDE.equals(filter)) {
return filter;
}
for (FeatureTypeRelation rel : ft.getRelations()) {
if (FeatureTypeRelation.JOIN.equals(rel.getType())) {
filter = reformatFilter(filter, rel.getForeignFeatureType());
filter = (Filter) filter.accept(new ValidFilterExtractor(rel), filter);
}
}
filter = (Filter) filter.accept(new SimplifyingFilterVisitor(), null);
return filter;
}
/** Populate the json object with related featues */
private JSONObject populateWithRelatedFeatures(
JSONObject j, SimpleFeature feature, SimpleFeatureType ft, ApplicationLayer al, int index)
throws Exception {
if (ft.hasRelations()) {
JSONArray related_featuretypes = new JSONArray();
for (FeatureTypeRelation rel : ft.getRelations()) {
boolean isJoin = rel.getType().equals(FeatureTypeRelation.JOIN);
if (isJoin) {
FeatureSource foreignFs = rel.getForeignFeatureType().openGeoToolsFeatureSource(TIMEOUT);
FeatureIterator<SimpleFeature> foreignIt = null;
try {
Query foreignQ = new Query(foreignFs.getName().toString());
// create filter
Filter filter = createFilter(feature, rel);
if (filter == null) {
continue;
}
// if join only get 1 feature
foreignQ.setMaxFeatures(1);
foreignQ.setFilter(filter);
// set propertynames
List<String> propertyNames;
if (al != null) {
propertyNames = setPropertyNames(al, foreignQ, rel.getForeignFeatureType(), edit);
} else {
propertyNames = new ArrayList<String>();
for (AttributeDescriptor ad : rel.getForeignFeatureType().getAttributes()) {
propertyNames.add(ad.getName());
}
}
if (propertyNames.isEmpty()) {
// if there are no properties to retrieve just get out
continue;
}
// get aliases
Map<String, String> attributeAliases = new HashMap<String, String>();
if (!edit) {
for (AttributeDescriptor ad : rel.getForeignFeatureType().getAttributes()) {
if (ad.getAlias() != null) {
attributeAliases.put(ad.getName(), ad.getAlias());
}
}
}
// Get Feature and populate JSON object with the values.
foreignIt = foreignFs.getFeatures(foreignQ).features();
while (foreignIt.hasNext()) {
SimpleFeature foreignFeature = foreignIt.next();
// join it in the same json
j =
toJSONFeature(
j,
foreignFeature,
rel.getForeignFeatureType(),
al,
propertyNames,
attributeAliases,
index);
}
} finally {
if (foreignIt != null) {
foreignIt.close();
}
foreignFs.getDataStore().dispose();
}
} else {
Filter filter = createFilter(feature, rel);
if (filter == null) {
continue;
}
JSONObject related_ft = new JSONObject();
related_ft.put("filter", CQL.toCQL(filter));
related_ft.put("id", rel.getForeignFeatureType().getId());
related_ft.put("foreignFeatureTypeName", rel.getForeignFeatureType().getTypeName());
related_featuretypes.put(related_ft);
}
}
if (related_featuretypes.length() > 0) {
j.put("related_featuretypes", related_featuretypes);
}
}
return j;
}