How to convert the text type to int type crawl property by adding custom stage in pipelining

Question

Hi all,

 In FS4SP 2010,  i was trying to crawl the HTML pages which has some metadatas. So after crawling, these metadatas (crawl properties) are in text format. But i need only one crawl property in integer type. So i tried pipeline extensibility stage.

I added a custom stage which takes a crawled property with type text(31) as input and sets to another crawl property with type int (20) as output. But it is not happening. The 'text' type is not getting converted to 'int' type. While viewing logs, the values are not coming. So can we use this approach to convert type 'text' to 'int' with web category. With sharepoint category, i am able to do but with web category im not able. So please guide me. Is there any other approach other than this??

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Sharath Kumar R