predicate serialization

Let's say that I have a bit of .NET code...

public class EventEnvelope
{
  public Dictionary<string, string> Headers { get; set; }
  public byte[] Body { get; set; }
}

public class EventSelector
{
  public Predicate<Dictionary<string, string>> Selector { get; set; }
}

Now I want to send this event selector to an event broker NOT written in .NET.

How might I serialize this predicate in a cross-platform way such that a program written in another language could reconstruct the predicate and execute it?

I had thought of trying to write a serializer that would write out the predicate as a bit of javascript and then either have rhino or jint interpret and execute it at the broker.

Or perhaps there's an actual开发者_StackOverflow社区 cross-platform way of representing predicates that I'm unaware of?

What do you think?

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Have you tried to define your predicate as an Expression, and then trying to serialize the expression tree? That way you can get a consistent way for serializing your predicates and executing them.