/**
* Safely computes context information objects through the described extension. If the extension
* is disabled, throws an exception or otherwise does not adhere to the contract described in
* {@link IRubyCompletionProposalComputer}, an empty list is returned.
*
* @param context the invocation context passed on to the extension
* @param monitor the progress monitor passed on to the extension
* @return the list of computed context information objects (element type: {@link
* org.eclipse.jface.text.contentassist.IContextInformation})
*/
public List computeContextInformation(
ContentAssistInvocationContext context, IProgressMonitor monitor) {
if (!isEnabled()) return Collections.EMPTY_LIST;
IStatus status;
try {
IRubyCompletionProposalComputer computer = getComputer();
if (computer == null) // not active yet
return Collections.EMPTY_LIST;
PerformanceStats stats = startMeter(context, computer);
List proposals = computer.computeContextInformation(context, monitor);
stopMeter(stats, COMPUTE_CONTEXT_INFORMATION);
if (proposals != null) {
fLastError = computer.getErrorMessage();
return proposals;
}
status = createAPIViolationStatus(COMPUTE_CONTEXT_INFORMATION);
} catch (InvalidRegistryObjectException x) {
status = createExceptionStatus(x);
} catch (CoreException x) {
status = createExceptionStatus(x);
} catch (RuntimeException x) {
status = createExceptionStatus(x);
} finally {
monitor.done();
}
fRegistry.informUser(this, status);
return Collections.EMPTY_LIST;
}
/**
* Notifies the described extension of a proposal computation session end.
*
* <p><em> Note: This method is called every time code assist is invoked and is
* <strong>not</strong> filtered by partition type. </em>
*/
public void sessionEnded() {
if (!isEnabled()) return;
IStatus status;
try {
IRubyCompletionProposalComputer computer = getComputer();
if (computer == null) // not active yet
return;
PerformanceStats stats = startMeter(SESSION_ENDED, computer);
computer.sessionEnded();
stopMeter(stats, SESSION_ENDED);
return;
} catch (InvalidRegistryObjectException x) {
status = createExceptionStatus(x);
} catch (CoreException x) {
status = createExceptionStatus(x);
} catch (RuntimeException x) {
status = createExceptionStatus(x);
}
fRegistry.informUser(this, status);
}
