topic Re: Activiti Spring bean and overloaded method error. in Alfresco Archive

Activiti Spring bean and overloaded method error.

unsavory — Wed, 27 Jul 2011 01:08:12 GMT

I have the following Spring bean methods:/** * Whether or not to auto-reject this applicant based on the * AutoRejectConfigItem rules configured in the system. * * @param user - The user to check. * @return - Whether or not to auto-reject. */ public boolean isUserAutoRejectCand

Re: Activiti Spring bean and overloaded method error.

jbarrez — Fri, 05 Aug 2011 12:09:36 GMT

What is the type of the email parameter? It seems to me it's a plain string, while your operation expects a User object.

Re: Activiti Spring bean and overloaded method error.

unsavory — Fri, 05 Aug 2011 23:34:40 GMT

Yes, it is a String. I also have a similar method in my service that takes a User object (same number of parameters). But looking at the reflection piece in Activiti, it only matches on number of arguments in the method and assumes this is the correct method to call. Which it is not.

Re: Activiti Spring bean and overloaded method error.

frederikherema1 — Tue, 09 Aug 2011 07:46:37 GMT

That's actually JUEL-implementation we ship in the activiti codebase, for doing the expression resolving. Have you checked the JUEL issues/forum for similar behaviour?

Re: Activiti Spring bean and overloaded method error.

frankee787 — Sat, 17 Sep 2011 06:43:48 GMT

@unsavory

Were you able to resolve this issue?

I too am facing the same issue. I have two methods as follows


public User getUser(String username) 

public User getUser(Integer userId)

Although I am passing a String as the argument , it tries to coerce it to an Integer


 ${structService.getUser(registrar)},

The value of the variable registrar is a String, but somehow its being coerced to an Integer.

Any idea why ?

Regards,
Franklin

Re: Activiti Spring bean and overloaded method error.

unsavory — Mon, 19 Sep 2011 16:47:58 GMT

I never figured out what the issue was because I didn't have time to investigate the JUEL library like frederikheremans mentioned above. The workaround for me was somewhat of a hack, but it works. I just created a new method with a different name. In your case you could have 2 methods: getUserByUsername and getUserById and it will work fine.

Re: Activiti Spring bean and overloaded method error.

frankee787 — Mon, 19 Sep 2011 16:57:16 GMT

Same over here. Never was able to figure it out. In the end I also created a new service with a different name. Was a hack but I too was short on time to figure it out.

Thanks anyways. Might be handy for someone else.

Regards,
Franklin

Re: Activiti Spring bean and overloaded method error.

smurfs — Mon, 15 Jun 2015 10:49:24 GMT

Hi
can anyone please let me know, is this still an issue. Because i am facing the same issue with 5.15.

Re: Activiti Spring bean and overloaded method error.

vasile_dirla — Mon, 15 Jun 2015 21:00:39 GMT

Hi,
I think is related to this one:
https://bz.apache.org/bugzilla/show_bug.cgi?id=56147

According to the EL specs method overloading is not supported (probably there are EL implementations which supports it but don't know to tell you which one.)

As I know EL get the methods via reflection calling this method:
<java>
public Method[] getMethods() throws SecurityException;
<java>

but in the documentation is written:
"The elements in the array returned are not sorted and are not in any particular order."
Which could lead to inconsistent behaviour for multiple EL calls.
the first call could succeed but the second one could fail (as you already noticed)
So the best solution is to create different methods having different names just to remove the confusion.

Have a look also here:
https://github.com/beckchr/juel/issues/72
JUEL documentation says: "If the given paramTypes is not null, select the method with the given name and parameter types. Else select the method with the given name that has the same number of parameters. If there are more than one such method, the method selection process is undefined. Else select the method with the given name that takes a variable number of arguments."

Re: Activiti Spring bean and overloaded method error.

vasile_dirla — Mon, 15 Jun 2015 21:01:34 GMT

Hi,
I think is related to this one:
https://bz.apache.org/bugzilla/show_bug.cgi?id=56147

According to the EL specs method overloading is not supported (probably there are EL implementations which supports it but don't know to tell you which one.)

As I know EL get the methods via reflection calling this method:
public Method[] getMethods() throws SecurityException;

but in the documentation is written:
"The elements in the array returned are not sorted and are not in any particular order."
Which could lead to inconsistent behaviour for multiple EL calls.
the first call could succeed but the second one could fail (as you already noticed)
So the best solution is to create different methods having different names just to remove the confusion.

Have a look also here:
https://github.com/beckchr/juel/issues/72
JUEL documentation says: "If the given paramTypes is not null, select the method with the given name and parameter types. Else select the method with the given name that has the same number of parameters. If there are more than one such method, the method selection process is undefined. Else select the method with the given name that takes a variable number of arguments."