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    <p>If you need powerful compile-time logic for Java, one way to do that is with some kind of code generation. Since, as other posters have pointed out, the Java language doesn't provide any features suitable for doing compile-time logic, this may be your best option (iff you really do have a need for compile-time logic). Once you have exhausted the other possibilities and you are <em>sure</em> you want to do code-generation, you might be interested in my open source project Rjava, available at:</p> <p><a href="http://www.github.com/blak3mill3r" rel="nofollow noreferrer">http://www.github.com/blak3mill3r</a></p> <p>It is a Java code generation library written in Ruby, which I wrote in order to generate Google Web Toolkit interfaces for Ruby on Rails applications automatically. It has proved quite handy for that.</p> <p>As a warning, it can be very difficult to debug Rjava code, Rjava doesn't do much checking, it just assumes you know what you're doing. That's pretty much the state of static metaprogramming anyway. I'd say it's significantly easier to debug than anything non-trivial done with C++ TMP, and it is possible to use it for the same kinds of things.</p> <p>Anyway, if you were considering writing a program which outputs Java source code, stop right now and check out Rjava. It might not do what you want yet, but it's MIT licensed, so feel free to improve it, deep fry it, or sell it to your grandma. I'd be glad to have other devs who are experienced with generic programming to comment on the design.</p>
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    1. POIs static metaprogramming possible in Java?
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    1. USBlake Miller
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