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David M. Karr (83) [Avatar] Offline
Reading through chapter 19, "Domain-Specific Languages", it appears you're trying to cover all the ways that someone could "cheat" (deliberately or accidentally) in their script to "get out of the sandbox". You cover what you can do with "import restrictions" seemingly very thoroughly. However, nowhere do you mention that it's very easy to reference a class without importing it, by referencing the fully-qualified class name. This would likely be dealt with in a SecurityManager, which you do talk about, but it would be useful to cover this case.