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Does anyone have a message filtering implementation?

 
Andres Gonzalez
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hello guys..
this is my problem:
A user can define as many properties as he wants: For example, for a car he can define:
model
color
type (sedan,..)
He can also specify values for it:
model > 1999
color = blue
type = sedan
Now, I have an application that publishes messages to a topic. So a publisher will do something like this:
model = 200 AND color = blue AND type = sedan
these rules fulfill the user's requirements, so the message should go this user. It is basically the concept of message selector in Java MEssage Service (JMS), and it is a subset of sql-92.
I need to implement this functionality for a different context (without using JMS) and I was wondering if someone here has any open source implementation of this message filtering, i don't wanna reinvent the wheel..
thanks
 
Peter Kristensson
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Depends on what you wan't to do with it.
I once build something similar that parses a search string containing a=b AND c=d AND ... and inserts the results in a tree-like structure. The tree was then used to get results and combining these.
Is this what you want, to filter the stuff and then use it for searching?
 
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