Indexing database with iFilter & full text search in SQL

I want to use iFilter in order to index txt, microsoft office and PDF documents in my system to be able to search through their contents. I have worked around this code project 开发者_开发百科example and all seems okay.

However, in the database design of my system, the files won't be in the database themselves. Instead i'm only storing the directories of the documents in a table called Documents.

My question is How should I apply iFilter now while the documents are not actually in the database to index?

is there a way to apply SQL Full Text Search with iFilter on the content of a directory instead of the content of byte arrays?