@Override
public void closeOperation(boolean operationOK, boolean addToHistory, int mode) {
ICompositeOperation endedComposite = null;
synchronized (openCompositeLock) {
if (DEBUG_OPERATION_HISTORY_UNEXPECTED) {
if (openComposite == null) {
Tracing.printTrace(
"OPERATIONHISTORY",
"Attempted to close operation when none was open"); //$NON-NLS-1$//$NON-NLS-2$
return;
}
}
// notifications will occur outside the synchonized block
if (openComposite != null) {
if (DEBUG_OPERATION_HISTORY_OPENOPERATION) {
Tracing.printTrace(
"OPERATIONHISTORY",
"Closing operation " + openComposite); // $NON-NLS-1$ //$NON-NLS-2$
}
endedComposite = openComposite;
openComposite = null;
}
}
// any mode other than EXECUTE was triggered by a request to undo or
// redo something already in the history, so undo and redo
// notification will occur at the end of that sequence.
if (endedComposite != null) {
if (operationOK) {
if (mode == EXECUTE) {
notifyDone(endedComposite);
}
if (addToHistory) {
add(endedComposite);
}
} else {
if (mode == EXECUTE) {
notifyNotOK(endedComposite);
}
}
}
}
@Override
public IStatus execute(IUndoableOperation operation, IProgressMonitor monitor, IAdaptable info)
throws ExecutionException {
Assert.isNotNull(operation);
// error if operation is invalid
if (!operation.canExecute()) {
return IOperationHistory.OPERATION_INVALID_STATUS;
}
// check with the operation approvers
IStatus status = getExecuteApproval(operation, info);
if (!status.isOK()) {
// not approved. No notifications are sent, just return the status.
return status;
}
/*
* If we are in the middle of an open composite, then we will add this
* operation to the open operation rather than add the operation to the
* history. We will still execute it.
*/
boolean merging = false;
synchronized (openCompositeLock) {
if (openComposite != null) {
// the composite shouldn't be executed explicitly while it is
// still
// open
if (openComposite == operation) {
return IOperationHistory.OPERATION_INVALID_STATUS;
}
openComposite.add(operation);
merging = true;
}
}
/*
* Execute the operation
*/
if (!merging) {
notifyAboutToExecute(operation);
}
try {
status = operation.execute(monitor, info);
} catch (OperationCanceledException e) {
status = Status.CANCEL_STATUS;
} catch (ExecutionException e) {
notifyNotOK(operation);
throw e;
} catch (Exception e) {
notifyNotOK(operation);
throw new ExecutionException(
"While executing the operation, an exception occurred", e); // $NON-NLS-1$
}
// if successful, the notify listeners are notified and the operation is
// added to the history
if (!merging) {
if (status.isOK()) {
notifyDone(operation);
add(operation);
} else {
notifyNotOK(operation, status);
// dispose the operation since we did not add it to the stack
// and will no longer have a reference to it.
operation.dispose();
}
}
// all other severities are not interpreted. Simply return the status.
return status;
}