/** Retrieve previous object from the remote scrollable cursor */
public Object scrollableCursorPreviousObject(
ObjID remoteScrollableCursorOid, ReadQuery query, DistributedSession session) {
Transporter transporter = null;
try {
transporter =
getRemoteSessionController()
.scrollableCursorPreviousObject(new Transporter(remoteScrollableCursorOid));
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
if (transporter == null) {
return null;
}
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
}
Object object = transporter.getObject();
if (object == null) {
// For bug 2797683 do not close if at end of stream.
return null;
}
if (query.isReadAllQuery() && (!query.isReportQuery())) { // could be DataReadQuery
object =
session.getObjectCorrespondingTo(
object,
transporter.getObjectDescriptors(),
new IdentityHashMap(),
(ObjectLevelReadQuery) query);
}
return object;
}
/** Return the scrollable cursor size */
public int scrollableCursorSize(ObjID cursorId) {
Transporter transporter = null;
try {
transporter = getRemoteSessionController().scrollableCursorSize(new Transporter(cursorId));
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
}
return ((Integer) transporter.getObject()).intValue();
}
/** INTERNAL: Return the table descriptor specified for the class. */
public Login getLogin() {
try {
Transporter transporter = getRemoteSessionController().getLogin();
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
} else {
return (Login) transporter.getObject();
}
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
}
/** INTERNAL Return the read-only classes */
public Vector getDefaultReadOnlyClasses() {
try {
Transporter transporter = getRemoteSessionController().getDefaultReadOnlyClasses();
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
} else {
return (Vector) transporter.getObject();
}
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
}
/** INTERNAL: Return the table descriptor specified for the alias. */
public ClassDescriptor getDescriptorForAlias(String alias) {
try {
Transporter transporter =
getRemoteSessionController().getDescriptorForAlias(new Transporter(alias));
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
} else {
return (ClassDescriptor) transporter.getObject();
}
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
}
/** INTERNAL: Perform remote function call */
public Object getSequenceNumberNamed(Object remoteFunctionCall) {
try {
Transporter transporter =
getRemoteSessionController().getSequenceNumberNamed(new Transporter(remoteFunctionCall));
Object returnValue = transporter.getObject();
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
}
return returnValue;
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
}
/** INTERNAL: Commit root unit of work from the client side to the server side. */
public RemoteUnitOfWork commitRootUnitOfWork(RemoteUnitOfWork theRemoteUnitOfWork) {
try {
Transporter transporter = new Transporter();
transporter.setObject(theRemoteUnitOfWork);
transporter.prepare(this.session);
transporter = getRemoteSessionController().commitRootUnitOfWork(transporter);
transporter.expand(this.session);
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
} else {
return (RemoteUnitOfWork) transporter.getObject();
}
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
}
/** Indicates whether the cursor is after the last row in the result set. */
public boolean scrollableCursorIsAfterLast(ObjID remoteScrollableCursorOid) {
Transporter transporter = null;
try {
transporter =
getRemoteSessionController()
.scrollableCursorIsAfterLast(new Transporter(remoteScrollableCursorOid));
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
if (transporter == null) {
return false;
}
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
}
return ((Boolean) transporter.getObject()).booleanValue();
}
/** Retrieves the current row index number */
public int scrollableCursorCurrentIndex(ObjID remoteScrollableCursorOid) {
Transporter transporter = null;
try {
transporter =
getRemoteSessionController()
.scrollableCursorAfterLast(new Transporter(remoteScrollableCursorOid));
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
if (transporter == null) {
return -1;
}
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
}
return ((Integer) transporter.getObject()).intValue();
}
/** 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 RemoteScrollableCursor cursorSelectObjects(
ScrollableCursorPolicy policy, DistributedSession session) {
try {
Transporter transporter =
getRemoteSessionController().cursorSelectObjects(new Transporter(policy));
if (!transporter.wasOperationSuccessful()) {
throw transporter.getException();
}
RemoteScrollableCursor remoteScrollableCursor =
(RemoteScrollableCursor) transporter.getObject();
remoteScrollableCursor.setSession(session);
remoteScrollableCursor.setPolicy(policy);
return remoteScrollableCursor;
} catch (RemoteException exception) {
throw CommunicationException.errorInInvocation(exception);
}
}
/** 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);
}
}