32 lines
2.4 KiB
Plaintext
32 lines
2.4 KiB
Plaintext
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aptIn16 is an implementation of the com.sun.mirror.* classes allowing classes implementing them to run as
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Java 1.6 javac in-process annotation processors. This is orders of magnitude faster than apt.
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It can be used by anyone who currently relies on apt but would like to switch to the newer/faster javac.
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On my companies rather large project using apache beehive annotation processors, compilation of a single
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module using apt took 13 minutes, that same module, using the same beehive processing code, running inside
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of aptIn16 takes about 45 seconds to compile now, and the output is identical.
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Also oracle announced that apt will no longer be in Java 8, so you might as well switch now!
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Notes:
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1. Not every method in com.sun.mirror.* has been implemented, basically just the bare minimum to get apache beehive
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to work, so if you use something different, you may need to implement another method or two. If you do, please
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send the code my way so everyone can benefit.
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2. This currently only works with a sun/oracle compiler, this is because Java 6 annotation processors don't have a
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concept of SourcePosition, which is needed by apt, so I have to use the com.sun.source.tree to get this info.
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All of the sun-specific code is in com.moparisthebest.mirror.util.ConvertSourcePosition, so if you know how to
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implement this for eclipse or another compiler, please let me know or do so and send me patches.
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3. The only *very* hacky part of this is that apt gave the entire command line sent to javac as options to the processor,
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where as Java 6 style annotation processors only get the options specifically meant for annotation processors, and
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processors like apache beehive rely on some of these options, the hardest to get of which is -sourcepath, which I can get
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decently on Java 6, but have to really hack it to get in Java 7. Sun compilers put the arguments in an System property,
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but there are no delimiters that tells you where one argument begins or ends, so that's a complete hack to try to parse it
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as well. Basically I try to do my best and not halt program execution if something goes wrong. Please tell me a better
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way to handle this.
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4. Currently, to use this with your own processors, look at netui-compiler for examples. apt-processor is a project that
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should auto-discover and run all apt-style processors automatically, but it isn't finished and doesn't quite work with beehive.
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