/** Retrieve next page size of objects from the remote cursored stream */
public Vector cursoredStreamNextPage(
RemoteCursoredStream remoteCursoredStream,
ReadQuery query,
DistributedSession session,
int pageSize) {
Transporter transporter = null;
try {
transporter =
getRemoteSessionController()
.cursoredStreamNextPage(new Transporter(remoteCursoredStream.getID()), pageSize);
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
if (transporter == null) {
return null;
}
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
}
Vector serverNextPageObjects = (Vector) transporter.getObject();
if (serverNextPageObjects == null) {
cursoredStreamClose(remoteCursoredStream.getID());
return null;
}
Vector clientNextPageObjects = serverNextPageObjects;
if (query.isReadAllQuery() && (!query.isReportQuery())) { // could be DataReadQuery
clientNextPageObjects = new Vector(serverNextPageObjects.size());
for (Enumeration objEnum = serverNextPageObjects.elements(); objEnum.hasMoreElements(); ) {
// 2612538 - the default size of Map (32) is appropriate
Object clientObject =
session.getObjectCorrespondingTo(
objEnum.nextElement(),
transporter.getObjectDescriptors(),
new IdentityHashMap(),
(ObjectLevelReadQuery) query);
clientNextPageObjects.addElement(clientObject);
}
}
return clientNextPageObjects;
}
/** INTERNAL: Returns remote cursor stream */
public RemoteCursoredStream cursorSelectObjects(
CursoredStreamPolicy policy, DistributedSession session) {
try {
Transporter transporter =
getRemoteSessionController().cursorSelectObjects(new Transporter(policy));
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
}
RemoteCursoredStream remoteCursoredStream = (RemoteCursoredStream) transporter.getObject();
remoteCursoredStream.setSession(session);
remoteCursoredStream.setPolicy(policy);
if (policy.getQuery().isReadAllQuery()
&& (!policy.getQuery().isReportQuery())) { // could be DataReadQuery
fixObjectReferences(transporter, (ObjectLevelReadQuery) policy.getQuery(), session);
}
return remoteCursoredStream;
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
}