protected Statement peekNextStatement() throws Exception {
if (!statefulHasNext()) return null;
Map.Entry<Key, Value> entry = iter.peek();
Key key = entry.getKey();
if (DOC.equals(key.getColumnFamily()))
return readStatement(
ByteStreams.newDataInput(key.getColumnQualifier().getBytes()), VALUE_FACTORY);
else
return readStatement(
ByteStreams.newDataInput(key.getColumnQualifier().getBytes()), VALUE_FACTORY, false);
}
public static Namespace getNamespace(Iterator<Entry<Key, Value>> rowResults) {
for (; rowResults.hasNext(); ) {
Entry<Key, Value> next = rowResults.next();
Key key = next.getKey();
Value val = next.getValue();
String cf = key.getColumnFamily().toString();
String cq = key.getColumnQualifier().toString();
return new NamespaceImpl(key.getRow().toString(), new String(val.get()));
}
return null;
}
protected List<Statement> nextDocument() throws QueryEvaluationException {
try {
Map.Entry<Key, Value> entry = iter.peek();
Key key = entry.getKey();
Value value = entry.getValue();
if (value.getSize() == 0) {
// not an aggregate document
return nextNonAggregateDocument();
// return
// Collections.singletonList(RdfIO.readStatement(ByteStreams.newDataInput(key.getColumnQualifier().getBytes()), VALUE_FACTORY, true));
}
List<Statement> document = new ArrayList<Statement>();
org.openrdf.model.Value subj =
RdfIO.readValue(
ByteStreams.newDataInput(key.getColumnQualifier().getBytes()),
VALUE_FACTORY,
FAMILY_DELIM);
Map<String, String> map = converter.toMap(entry.getKey(), value);
for (Map.Entry<String, String> e : map.entrySet()) {
String predObj = e.getKey();
String[] split = predObj.split(FAMILY_DELIM_STR);
document.add(
new StatementImpl(
(Resource) subj,
VALUE_FACTORY.createURI(split[0]),
RdfIO.readValue(
ByteStreams.newDataInput(split[1].getBytes()), VALUE_FACTORY, FAMILY_DELIM)));
}
iter.next();
return document;
} catch (Exception e) {
throw new QueryEvaluationException("Error retrieving document", e);
}
}