Hi, > Thanks for that, I had not realised that the open method was simply > inherited from the FSDirectory, I should have read the docs. > > However, it makes no sense to me that a call to NIOFSDirectory.open() can > end up opening a MMapDirectory, and in general that a call to one subclass > can end up opening any other of the subclasses. Perhaps the open() method > which selects the subclass should only be in the FSDirectory class and the > subclass open() methods should specifically open the class for which they are > called.
This cannot be prevented. FSDirectory.open() is a static method and exists only in the class FSDirectory not anywhere else. Your build environment (e.g. IDE) should warn you that you are calling a static method in a non-static context or on a different class name. Java unfortunately always makes static fields and variables visible to subclasses, but they are not virtual and is a "bug" in Java. MMapDirectory has no static open method. Uwe --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
