How to modify constructor of custom exception class

[Former Member]

Hello experts,

I have created a custom exception class that should perform a specific task at instantiation. So I wanted to change the default constructor that has been automatically created for this class. However, as the SAP system tells me, I am not allowed to change the construtor of a custom exception class.

So I ask myself, what do do, any way of forcing to change the constructor?

Or, alternatively, another way of automatically performing a task at ínstantiation of this exception class?

Thanks in advance for your help.

Kind regards, Matthis

[SuhaSaha]

Hello Matthias,

I have created a custom exception class that should perform a specific task at instantiation. So I wanted to change the default constructor that has been automatically created for this class.

What specific task do you want to perform? Can you be a lil' bit more specific?

BR,

Suhas

[Former Member]

I need to call a specific Z-function with some details regarding the error that caused the exception. In Java I would simply override the exception class constructor of my custom exception and call the external function from there. But how to do so in ABAP OO?

[hendrik_brandes]

Hello Matthias,

you should use the enhancement options.

Go into the constructor-code, press Ctrl-F4 ( Enhance ). With Edit->Show implicit enhancement options you see, where you can post your own code.

Kind regards,

Hendrik

[Former Member]

great, thanks!

[SuhaSaha]

I need to call a specific Z-function with some details regarding the error that caused the exception. In Java I would simply override the exception class constructor of my custom exception and call the external function from there. But how to do so in ABAP OO?

Hello Matthias,

I understand that we cannot change the CONSTRUCTOR of the exception class since it is generated automatically when activating the exception class.

As an alternative you can create a (instance, public) method which will call the Z-FM. And call this method when the exception is raised:

DATA: lcx_test TYPE REF TO zcx_test.

TRY .
* [try block]
CATCH zcx_test INTO lcx_test.
  lcx_test->call_z_fm( ). "Call the FM when the exception is raised
ENDTRY.

BR,

Suhas

PS: Which ABAP release are you working on?

[Former Member]

Hi Suhas,

sure, I could simply call the external function as soon as the exception is thrown.

However, I like the OO idea of having objects doing their stuff on their own, so that I don't have to think

Cheers