/**
* Loads page of information.
*
* @param pageNumber page number
* @throws DiscoveryException if loading page fails
*/
private void loadPage(int pageNumber) throws DiscoveryException {
// clear buffers
feedRecords.clear();
query.getResult().getRecords().clear();
// prepare and execute query
int startRecord = getStartRecordOfPage(pageNumber);
query.getFilter().setStartRecord(startRecord);
LuceneQueryAdapterImpl lqa = new LuceneQueryAdapterImpl();
lqa.execute(context, query);
ResourceIdentifier resourceIdentifier = ResourceIdentifier.newIdentifier(context);
// traverse through discovered records and build IFeedRecord for each of them (as
// DiscoveredRecordAdapter)
DiscoveredRecords records = query.getResult().getRecords();
for (DiscoveredRecord dr : records) {
DiscoveredRecordAdapter record = new DiscoveredRecordAdapter(resourceIdentifier, dr);
Map<String, IFeedAttribute> attrs = new HashMap<String, IFeedAttribute>();
Map<String, List<String>> data = lqa.getMapping().get(dr);
if (data != null) {
for (Map.Entry<String, List<String>> e : data.entrySet()) {
List<IFeedAttribute> l = new ArrayList<IFeedAttribute>();
for (String s : e.getValue()) {
l.add(IFeedAttribute.Factory.create(s, 256));
}
attrs.put(e.getKey(), IFeedAttribute.Factory.create(l));
}
record.getData(IFeedRecord.STD_COLLECTION_INDEX).putAll(attrs);
}
linkBuilder.build(record);
feedRecords.add(record);
}
}
/**
* Performs search operation.
*
* @param request HTTP servlet request
* @param response HTTP servlet response
* @param context request context
* @param query query
* @return records
* @throws Exception if searching fails
*/
@Override
public IFeedRecords doSearch(
HttpServletRequest request,
HttpServletResponse response,
RequestContext context,
RestQuery query)
throws Exception {
MessageBroker msgBroker = new FacesContextBroker(request, response).extractMessageBroker();
final Map<DiscoveredRecord, Map<String, List<String>>> mapping =
new HashMap<DiscoveredRecord, Map<String, List<String>>>();
List<IFeedRecords.FieldMeta> fields = new ArrayList<IFeedRecords.FieldMeta>();
loadStdFieldMeta(fields);
int startRecord = query.getFilter().getStartRecord();
boolean returnIdsOnly = Val.chkBool(Val.chkStr(request.getParameter("returnIdsOnly")), false);
if (returnIdsOnly) {
startRecord = 1;
query.getFilter().setMaxRecords(1);
LuceneQueryAdapter tmp = new LuceneQueryAdapter();
tmp.execute(context, query);
query.getFilter().setMaxRecords(query.getResult().getNumberOfHits());
}
query.getFilter().setStartRecord(startRecord);
LuceneQueryAdapter lqa =
new LuceneQueryAdapter() {
@Override
protected void onRecord(DiscoveredRecord record, Document document) {
Map<String, List<String>> fieldMap = new HashMap<String, List<String>>();
for (Fieldable field : document.getFields()) {
String name = field.name();
List<String> fieldValues = fieldMap.get(name);
if (fieldValues == null) {
fieldValues = new ArrayList<String>();
fieldMap.put(name, fieldValues);
}
fieldValues.add(field.stringValue());
}
mapping.put(record, fieldMap);
}
};
lqa.execute(context, query);
startRecord += query.getFilter().getMaxRecords();
loadLuceneMeta(context, fields);
OpenSearchProperties osProps = new OpenSearchProperties();
osProps.setShortName(msgBroker.retrieveMessage("catalog.openSearch.shortName"));
osProps.setNumberOfHits(query.getResult().getNumberOfHits());
osProps.setStartRecord(query.getFilter().getStartRecord());
osProps.setRecordsPerPage(query.getFilter().getMaxRecords());
ResourceIdentifier resourceIdentifier = ResourceIdentifier.newIdentifier(context);
DiscoveredRecordsAdapter discoveredRecordsAdapter =
new DiscoveredRecordsAdapter(
resourceIdentifier, osProps, fields, query.getResult().getRecords(), mapping);
FeedLinkBuilder linkBuilder =
new FeedLinkBuilder(context, RequestContext.resolveBaseContextPath(request), msgBroker);
for (IFeedRecord record : discoveredRecordsAdapter) {
linkBuilder.build(record);
}
return discoveredRecordsAdapter;
/*
MessageBroker msgBroker = new FacesContextBroker(request, response).extractMessageBroker();
FeedLinkBuilder linkBuilder = new FeedLinkBuilder(RequestContext.resolveBaseContextPath(request), msgBroker);
DcatRecordsAdapter discoveredRecordsAdapter = new DcatRecordsAdapter(msgBroker, linkBuilder, context, query);
return discoveredRecordsAdapter;
*/
}