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
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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?