Re: Calling a local class from a run-time generated class

From:

"Daniel Pitts" <googlegroupie@coloraura.com>

Newsgroups:

comp.lang.java.programmer

Date:

8 Jan 2007 18:33:27 -0800

Message-ID:

<1168310007.713951.200910@s34g2000cwa.googlegroups.com>

Florian Weimer wrote:

I'm trying to create, using the ASM library, a class which calls
methods in an another class specified at run-time (passed as its Class
object). I don't think my problem is ASM-related, that's why I'm
asking here.

My approach works just fine when the class being called is declared
"public", but not if it's a local class in some member method.

The local class I'm trying to call looks like this in javap:

[snip]

I had hoped that the similarity is sufficient. Howver, executing the
generated class results in an IllegalAccessError exception ("tried to
access class de.enyo.pcre.PatternTest$1T from class
de.enyo.pcre.PatternTest$1T$RegExpDispatcher").

I'm using a trivial class loader which specifies the loader of
PatternTest$1T as its parent. The "public" attribute of the generated
class is required because I need it to instantiate the class.

Any ideas? How can I work around these accessibility checks?

My guess is that the local class needs to either be public, or package
local and in the same package as the generated class. The JVM does
inforce access modifiers to some degree.