Hi all. The Lookup class contains an "unreflect" method which converts Method objects into MethodHandles. I am lookingo for something that does just the opposite and I wonder if the JDK provides this functionality or if otherwise you would accept a patch from us such that it did.
Our motivation for this is as follows. We are trying to extend the AspectJ compiler such that it allows the runtime to match method-call, field-set and field-get pointcuts against invokedynamic instructions, so that effectively a pointcut such as call(* foo()) would match also if "foo" is called via invokedynamic. Our current design for this is as follows: We wrap all original bootstrap methods into a wrapper which (a) invokes the original bootstrap code, (b) retrieves the method handle returned by that bootstrap code and matches it against all pointcuts of all aspects and if any pointcuts do match then (c) returns a modified method handle that implements the intended advice-execution logic. Steps (a) and (c) seem to work quite smoothly but (b) is giving us trouble. This is because, to match AspectJ pointcuts at runtime, we would like to use ajc's weaving API: http://eclipse.org/aspectj/doc/next/weaver-api/org/aspectj/weaver/tools/PointcutExpression.html#matchesMethodCall(java.lang.reflect.Method, java.lang.Class) This API requires jva.lang.reflect objects and has no knowledge of MethodHandles. Hence the need for a converter. I do realize that not every kind of MethodHandle may actually *have* an appropriate Method object, as not every MethodHandle actually points to a method. But it would be great to have a getMethod() method for those that do, or a getField() method for those that represent field accesses. Any pointers in this direction would be appreciated. Also, if you think that what I am after will *not* be possible for some reason, it would be great if you could let me know that, too. Best wishes, Eric Bodden -- Eric Bodden, Ph.D., http://sse.ec-spride.de/ http://bodden.de/ Head of Secure Software Engineering Group at EC SPRIDE Tel: +49 6151 16-75422 Fax: +49 6151 16-72051 Room 3.2.14, Mornewegstr. 30, 64293 Darmstadt _______________________________________________ mlvm-dev mailing list mlvm-dev@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev
