@Override
    public boolean hasNext() {
        if (closed) {
            throw new IllegalStateException("Cursor has been closed");
        }

        if (cursor == null) {
            FindOperation<DBObject> operation = getQueryOperation(decoder);
            if (operation.getCursorType() == CursorType.Tailable) {
                operation.cursorType(CursorType.TailableAwait);
            }
            initializeCursor(operation);
        }

        boolean hasNext = cursor.hasNext();
        setServerCursorOnFinalizer(cursor.getServerCursor());
        return hasNext;
    }
@Override
    public boolean hasNext() {
        if (closed) {
            throw new IllegalStateException("Cursor has been closed");
        }

        if (cursor == null) {
            FindOperation<DBObject> operation = getQueryOperation(decoder);
            if (operation.getCursorType() == CursorType.Tailable) {
                operation.cursorType(CursorType.TailableAwait);
            }
            initializeCursor(operation);
        }

        boolean hasNext = cursor.hasNext();
        setServerCursorOnFinalizer(cursor.getServerCursor());
        return hasNext;
    }
@ Override public boolean hasNext ( ) { if ( closed ) { throw new IllegalStateException ( "Cursor has been closed" ) ; } if ( cursor == null ) { FindOperation < DBObject > operation = getQueryOperation ( decoder ) ; if ( operation . getCursorType ( ) == CursorType . Tailable ) { operation . cursorType ( CursorType . TailableAwait ) ; } initializeCursor ( operation ) ; } boolean hasNext = cursor . hasNext ( ) ; setServerCursorOnFinalizer ( cursor . getServerCursor ( ) ) ; return hasNext ; }
Checks if there is another object available.

<p><em>Note</em>: Automatically adds the {@link Bytes#QUERYOPTION_AWAITDATA} option to any cursors with the
{@link Bytes#QUERYOPTION_TAILABLE} option set. For non blocking tailable cursors see {@link #tryNext }.</p>

@return true if there is another object available
@mongodb.driver.manual /core/cursors/#cursor-batches Cursor Batches
Checks if there is another object available .