Re: Reflection: how does one access a protected member in a superclass reflectively?

Hi Peter, firstly: thank you *very* much again for your kind hints and help! Ad Rexx and Java: the aim is to have Rexx (dynamically typed, caseless) behave 1:1 like a compilable and runnable Java program. Over the course of time I looked into ASM (many, many years ago) to add the ability to cre

Re: Reflection: how does one access a protected member in a superclass reflectively?

Hi Rony, On 01/22/18 16:35, Rony G. Flatscher wrote: Hi Peter, thank you *very* much also for your kind explanations and even coming up with agent code to demonstrate how one could use that approach! In fact I have been doing a static analysis in the past (since Java 1.1) to determine whethe

Re: Reflection: how does one access ...

Hi, Attaching the patch as a .patch or .txt file should be sufficient for small contributions and example code. Roger On 1/22/2018 10:39 AM, Rony G. Flatscher wrote: Hi, On 22.01.2018 16:24, Roger Riggs wrote: Contributions need to be submitted using the OpenJDK infrastructure to adhere t

Re: Reflection: how does one access a protected member in a superclass reflectively?

Hi, On 22.01.2018 16:24, Roger Riggs wrote: > Contributions need to be submitted using the OpenJDK infrastructure to adhere > to the IP requirements. Would you have a link which OpenJFDK infrastructure to use in this case? > The mail lists shold pass attachments that are text and patches though

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 22.01.2018 12:18, Alan Bateman wrote: > On 22/01/2018 09:58, Peter Levart wrote: >> : >> >> The 2nd problem is not trivial as you want to access a protected member on >> behalf of some other >> sub-class of the member's declaring class which is not cooperating >> (voluntarily handing you an >

Re: Reflection: how does one access a protected member in a superclass reflectively?

Hi Peter, thank you *very* much also for your kind explanations and even coming up with agent code to demonstrate how one could use that approach! In fact I have been doing a static analysis in the past (since Java 1.1) to determine whether members should be accessible to Rexx, restricting acce

Re: Reflection: how does one access a protected member in a superclass reflectively?

Hi, Contributions need to be submitted using the OpenJDK infrastructure to adhere to the IP requirements. The mail lists shold pass attachments that are text and patches though you may need to be sure your mailer attaches them with the correct mime-types and/or extensions. Roger p.s. The cu

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 19.01.2018 15:38, Alan Bateman wrote: > On 18/01/2018 15:07, Rony G. Flatscher wrote: >> An attachment in the email has been found to contain executable code and has >> been removed. >> >> File removed : java9modules.zip, zip,cmd >> --

Re: Reflection: how does one access a protected member in a superclass reflectively?

@Potential implementer of below trick BEWARE! While I tried to be smart by "injecting" special java agent powers into designated trusted class, the presented mechanism is NOT SAFE as I identify the class only by it's name. An attacker might create it's own pair of classes with same names (runt

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 01/22/2018 12:18 PM, Alan Bateman wrote: On 22/01/2018 09:58, Peter Levart wrote: : The 2nd problem is not trivial as you want to access a protected member on behalf of some other sub-class of the member's declaring class which is not cooperating (voluntarily handing you an instance of

Re: Reflection: how does one access a protected member in a superclass reflectively?

Hi Rony, On 01/22/2018 10:58 AM, Peter Levart wrote: The 2nd problem is not trivial as you want to access a protected member on behalf of some other sub-class of the member's declaring class which is not cooperating (voluntarily handing you an instance of its Lookup object). This currently req

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 22/01/2018 09:58, Peter Levart wrote: : The 2nd problem is not trivial as you want to access a protected member on behalf of some other sub-class of the member's declaring class which is not cooperating (voluntarily handing you an instance of its Lookup object). This currently requires the

Re: Reflection: how does one access a protected member in a superclass reflectively?

Hi Rony, On 01/18/2018 04:11 PM, Rony G. Flatscher wrote: On 18.01.2018 10:58, Alan Bateman wrote: On 17/01/2018 18:53, Rony G. Flatscher wrote: : Would you have concrete suggestions for this use-case, i.e. a framework that is not part of a module, but having a need to access public types fr

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 18/01/2018 15:07, Rony G. Flatscher wrote: An attachment in the email has been found to contain executable code and has been removed. File removed : java9modules.zip, zip,cmd Dear Alan: tried to come up with a "cleane

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 18.01.2018 10:58, Alan Bateman wrote: > On 17/01/2018 18:53, Rony G. Flatscher wrote: >> >> : >> >> Would you have concrete suggestions for this use-case, i.e. a framework that >> is not part of a >> module, but having a need to access public types from exported packages and >> get reflective

Re: Reflection: how does one access a protected member in a superclass reflectively?

Dear Alan: tried to come up with a "cleaner" version to zip it up, however the error would not occur there. --- As I have to get off for today, I just zipped up yesterday's version "as is" that exhibits that compile error and attach it to this e-mail. Just unzip it, go into "java9module" (thi

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 17/01/2018 18:53, Rony G. Flatscher wrote: : Would you have concrete suggestions for this use-case, i.e. a framework that is not part of a module, but having a need to access public types from exported packages and get reflective access to objects supertype's protected members? I think it

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 17/01/2018 18:53, Rony G. Flatscher wrote: : Not with Java 9 javac, the following Java program: public class TestUse {     public static void main (String args[]) {     mtest3.Class03A o=new mtest3.Class03A();     System.out.println("o: "+o+", myClassName: "+o.m

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 17.01.2018 14:12, Alan Bateman wrote: > On 17/01/2018 12:18, Rony G. Flatscher wrote: >> : >> >> The reflection logic in the bridge is (simplified) as follows: >> >> * use the object's 'o' class and look up its declared methods or fields, >> analyze further, if >> member is 'public', ot

Re: Reflection: how does one access a protected member in a superclass reflectively?

Disclaimer: I don't have access to the full picture but wanted to throw this out there. Maybe it will be useful. Maybe you've already considered doing something like this and shot it down a long time ago. I don't know if there are show stoppers and I don't have the end goal in mind. However it

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 17/01/2018 12:18, Rony G. Flatscher wrote: : The reflection logic in the bridge is (simplified) as follows: * use the object's 'o' class and look up its declared methods or fields, analyze further, if member is 'public', otherwise o iterate over all of its superclasses looking u

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 16.01.2018 20:38, John Rose wrote: > On Jan 16, 2018, at 10:37 AM, Rony G. Flatscher > wrote: >> >> Well that is probably the core of the problem: who needs to be the subclass, >> the reflector or the >> object to be reflected upon (whose inheritance tree is bei

Re: Reflection: how does one access a protected member in a superclass reflectively?

On Jan 16, 2018, at 1:08 PM, Jochen Theodorou wrote: > > which is a big deal of a problem if the class, that is supposed to be exposed > to the framework is not under the control of the framework. And there is no > good solution (rewriting the bytecode for example is no good solution) Yep. We

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 16.01.2018 20:38, John Rose wrote: On Jan 16, 2018, at 10:37 AM, Rony G. Flatscher wrote: Well that is probably the core of the problem: who needs to be the subclass, the reflector or the object to be reflected upon (whose inheritance tree is being walked up towards the root class, and if

Re: Reflection: how does one access a protected member in a superclass reflectively?

On Jan 16, 2018, at 10:37 AM, Rony G. Flatscher wrote: > > Well that is probably the core of the problem: who needs to be the subclass, > the reflector or the > object to be reflected upon (whose inheritance tree is being walked up > towards the root class, and > if public or protected members

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 16.01.2018 16:03, Alan Bateman wrote: > On 16/01/2018 13:50, Rony G. Flatscher wrote: >> The excercise here is as follows: >> >> * there are classes in "mod_A" which get extended in "mod_B" and once more >> extended in "mod_C".  >> * Hence "mod_B" requires "mod_A", and "mod_C" requires "mo

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 16/01/2018 13:50, Rony G. Flatscher wrote: The excercise here is as follows: * there are classes in "mod_A" which get extended in "mod_B" and once more extended in "mod_C". * Hence "mod_B" requires "mod_A", and "mod_C" requires "mod_B", where "mod_B" exports to "mod_C" only * Th

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 16.01.2018 10:18, Alan Bateman wrote: > On 15/01/2018 20:56, Rony G. Flatscher wrote: >> : >> >> So the question is, how can I reflectively access "mtest1.Class01A" static >> protected field >> "myClassName" from "mtest3.Class03a" in Java 9? >> > The scenario in your mail is complicated but if

Re: Reflection: how does one access a protected member in a superclass reflectively?

On 15/01/2018 20:56, Rony G. Flatscher wrote: : So the question is, how can I reflectively access "mtest1.Class01A" static protected field "myClassName" from "mtest3.Class03a" in Java 9? The scenario in your mail is complicated but if I read it correctly then I would expect this code in mtes