Well, I figured out a way to have proxy determine the type of a method when doing invocation recording. It took me a while, but I got it. The code is checked into the proxy 2.0 branch. Now, I've got my builders working for commons-expression, too! :)
On Wed, Apr 9, 2008 at 6:30 PM, Michael Heuer <[EMAIL PROTECTED]> wrote: > On Wed, 9 Apr 2008, Antonio Petrelli wrote: > > > 2008/4/9, James Carman <[EMAIL PROTECTED]>: > > > Does anyone have code that can take care of this situation: > > > > > > List<String> strings = new ArrayList<String>(); > > > > > > Class returnType = getReturnType(strings.getClass(), "get", int.class); > > > > > > I want the "returnType" to be java.lang.String. Does anyone have code > > > that would return that? Is it possible? > > > > It's not possible: > > http://java.sun.com/j2se/1.5.0/docs/guide/language/generics.html > > > > <snip> > > Generics are implemented by type erasure: generic type information is > > present only at compile time, after which it is erased by the > > compiler. > > </snip> > > Right, you can get at the declared type(s) with e.g. > > > List<String> strings = new ArrayList<String>(); > ParameterizedType parameterizedType = (ParameterizedType) > strings.getClass().getGenericSuperclass(); > Type[] types = parameterizedType.getActualTypeArguments(); > System.out.println(Arrays.asList(types)); > > [E] > > static class StringList extends ArrayList<String> { } > > List<String> strings = new StringList(); > ParameterizedType parameterizedType = (ParameterizedType) > strings.getClass().getGenericSuperclass(); > Type[] types = parameterizedType.getActualTypeArguments(); > System.out.println(Arrays.asList(types)); > > [class java.lang.String] > > but not the runtime type(s). > > michael > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
