Interfaces in OO ABAP

Former Member · ‎2015 Feb 12

Hello Experts,

I am using interfaces in OO ABAP and having problem as shown below .

The CODE is :

interface lif_emp.

methods:

add_emp

importing im_no type i

im_name type string

im_wage type i .

endinterface. "LIF_EMP

*----------------------------------------------------------------------*

* CLASS lcl_comp_emp DEFINITION

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_comp_emp definition .

public section .

interfaces lif_emp .

types: begin of t_emp,

no type i,

name type string,

wage type i,

end of t_emp .

methods:

constructor ,

>>>>>>>>>>>(I am Having problem here. Did I miss something)<<<<<<<<<<<<<<<<<<<<

importing im_no type i

im_name type string

im_wage type i ,

display_emp_list,

display_no_of_emp .

protected section.

private section .

class-data : i_emp_list type table of t_emp,

no_of_emp type i .

endclass. "LCL_COMP_EMP DEFINITION

*----------------------------------------------------------------------*

* CLASS LCL_COMP_EMP IMPLEMENTATION

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_comp_emp implementation .

method constructor .

no_of_emp = no_of_emp + 1 .

endmethod . "CONSTRUCTOR

method lif_emp~add_emp .

data: l_emp type t_emp .

l_emp-no = im_no .

l_emp-name = im_name .

l_emp-wage = im_wage .

append l_emp to i_emp_list .

endmethod . "ADD_EMP

method display_emp_list .

data: l_emp type t_emp .

write: / 'LIST OF EMPLOYEES'.

loop at i_emp_list into l_emp.

write: / l_emp-no, l_emp-name, l_emp-wage .

endloop.

endmethod . "DISPLAY_EMP_LIST

method display_no_of_emp .

skip 3 .

write: / 'TOTAL NO OF EMPLOYEES : ', no_of_emp .

endmethod . "DISPLAY_NO_OF_EMP

endclass. "LCL_COMP_EMP IMPLEMENTATION

*----------------------------------------------------------------------*

* CLASS LCL_BLUECOLLAR_EMPLOYEE DEFINITIO

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_bluecollar_employee definition

inheriting from lcl_comp_emp.

public section .

methods :

constructor

importing im_no type i

im_name type string

im_hours type i

im_hourly_payment type i,

lif_emp~add_emp redefinition.

private section .

data : no type i,

name type string,

hours type i,

hourly_payment type i.

endclass. "LCL_BLUECOLLAR_EMPLOYEE DEFINITIO

*----------------------------------------------------------------------*

* CLASS LCL_BLUECOLLAR_EMPLOYEE IMPLEMENTATION

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_bluecollar_employee implementation .

method constructor.

call method super->constructor .

no = im_no .

name = im_name .

hours = im_hours.

hourly_payment = im_hourly_payment .

endmethod . "CONSTRUCTOR

method lif_emp~add_emp .

data : l_wage type i .

l_wage = hours * hourly_payment.

call method super->lif_emp~add_emp

exporting

im_no = no

im_name = name

im_wage = l_wage.

endmethod . "ADD_EMP

endclass. "LCL_BLUECOLLAR_EMPLOYEE IMPLEMENTATION

*----------------------------------------------------------------------*

* CLASS LCL_WHITECOLLAR_EMPLOYEE DEFINITIO

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_whitecollar_employee definition

inheriting from lcl_comp_emp.

public section.

methods :

constructor

importing im_no type i

im_name type string

im_monthly_salary type i

im_monthly_deducations type i ,

lif_emp~add_emp redefinition.

private section .

data : no type i,

name type string,

monthly_salary type i,

monthly_deducations type i.

endclass . "LCL_WHITECOLLAR_EMPLOYEE DEFINITIO

*----------------------------------------------------------------------*

* CLASS LCL_WHITECOLLAR_EMPLOYEE IMPLEMENTATION

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_whitecollar_employee implementation .

method constructor .

call method super->constructor.

no = im_no.

name = im_name.

monthly_salary = im_monthly_salary.

monthly_deducations = im_monthly_deducations.

endmethod . "CONSTRUCTOR

method lif_emp~add_emp.

data: l_wage type i.

l_wage = monthly_salary - monthly_deducations.

call method super->lif_emp~add_emp

exporting

im_no = no

im_name = name

im_wage = l_wage.

endmethod. "ADD_EMP

endclass. "LCL_WHITECOLLAR_EMPLOYEE IMPLEMENTATION

data: o_bluecollar_emp1 type ref to lcl_bluecollar_employee,

o_whitecollar_emp1 type ref to lcl_whitecollar_employee.

start-of-selection .

create object o_bluecollar_emp1

exporting

im_no = 1

im_name = 'TARAN'

im_hours = 38

im_hourly_payment = 75.

call method o_bluecollar_emp1->lif_emp~add_emp

exporting

im_no = 1

im_name = 'TARAN'

im_wage = 0.

create object o_whitecollar_emp1

exporting

im_no = 2

im_name = 'MANMEET'

im_monthly_salary = 10000

im_monthly_deducations = 2500.

call method o_whitecollar_emp1->lif_emp~add_emp

exporting

im_no = 2

im_name = 'MANMEET'

im_wage = 0.

call method o_whitecollar_emp1->display_emp_list.

call method o_whitecollar_emp1->display_no_of_emp.

Thanks & Regards

Tarandeep Singh

Former Member · ‎2015 Feb 12

Hi,

methods:

            constructor
*                                                       >>>>>>>>>>>(I am Having problem here. Did I miss something)<<<<<<<<<<<<<<<<<<<<

            importing im_no type i

                      im_name type string

                      im_wage type i ,

                      display_emp_list,

                      display_no_of_emp .

Please check syntax check once you get the ans.

Thanks

Satish

Former Member · ‎2015 Feb 12

Thanks for reply.....But its not working

former_member302911 · ‎2015 Feb 12

The comma ? Remove it

methods:

constructor , <<<<<<<<

>>>>>>>>>>>(I am Having problem here. Did I miss something)<<<<<<<<<<<<<<<<<<<<

importing im_no type i

im_name type string

im_wage type i ,

Former Member · ‎2015 Feb 12

No ,

If i erase comma then i'll get the error

class lcl_bluecollar_employee implementation .

method constructor.

call method super->constructor . << obligatory parameter "IM_NO" had no value assigned to it>>

no = im_no .

name = im_name .

hours = im_hours.

hourly_payment = im_hourly_payment .

endmethod . "CONSTRUCTOR

former_member302911 · ‎2015 Feb 12

Tarandeep,

i see some problem here...

No need to set the dot at end of any instruction.

You miss the EXPORTING statement.

The parameters are inverted.

The correct syntax is this:

call method super->constructor

EXPORTING

im_no = no

im_name = name

im_hours = hours

im_hourly_payment = hourly_payment .

or this, in short format

call method super->constructor( im_no = no

im_name = name

im_hours = hours

im_hourly_payment = hourly_payment ).

Regards,

Angelo.

Former Member · ‎2015 Feb 12

No sir,

Now it is asking for a period (.) after Constructor .

Former Member · ‎2015 Feb 12

Hi,

Formal parameter declaration using IMPORTING, in Calling area using EXPORTING (Use vice versa )

In your case use only below way in calling time

      call method super->constructor
      EXPORTING
         im_no = no
         im_name = name
         im_wage = hours.

Thanks

Satish

Former Member · ‎2015 Feb 13

No Sir,

Its not working because we also have hourly_payment in SUBCLASS LCL_BLUECOLLAR_EMPLOYEE and

monthly_salary = im_monthly_salary.

monthly_deducations = im_monthly_deducations.

into 2nd SUBCLASS LCL_WHITECOLLAR_EMPLOYEE .

Where is the error exactly......PLEASE find it .

Thanks

Taran

Former Member · ‎2015 Feb 13

GOT THE CORRECT ANSWER

HERE IS THE RIGHT CODE :

report zooabap_interface.

*----------------------------------------------------------------------*

* INTERFACE LIF_EMP

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

interface lif_emp.

methods:

add_emp

importing im_no type i

im_name type string

im_wage type i .

endinterface. "LIF_EMP

*----------------------------------------------------------------------*

* CLASS lcl_comp_emp DEFINITION

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_comp_emp definition .

public section .

interfaces lif_emp .

types: begin of t_emp,

no type i,

name type string,

wage type i,

end of t_emp .

methods:

constructor,

display_emp_list ,

display_no_of_emp .

private section .

class-data : i_emp_list type table of t_emp,

no_of_emp type i .

endclass. "LCL_COMP_EMP DEFINITION

*----------------------------------------------------------------------*

* CLASS LCL_COMP_EMP IMPLEMENTATION

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_comp_emp implementation .

method constructor .

no_of_emp = no_of_emp + 1 .

endmethod . "CONSTRUCTOR

method lif_emp~add_emp .

data: l_emp type t_emp .

l_emp-no = im_no .

l_emp-name = im_name .

l_emp-wage = im_wage .

append l_emp to i_emp_list .

endmethod . "ADD_EMP

method display_emp_list .

data: l_emp type t_emp .

write: / 'LIST OF EMPLOYEES'.

loop at i_emp_list into l_emp.

write: / l_emp-no, l_emp-name, l_emp-wage .

endloop.

endmethod . "DISPLAY_EMP_LIST

method display_no_of_emp .

skip 3 .

write: / 'TOTAL NO OF EMPLOYEES : ', no_of_emp .

endmethod . "DISPLAY_NO_OF_EMP

endclass. "LCL_COMP_EMP IMPLEMENTATION

*----------------------------------------------------------------------*

* CLASS LCL_BLUECOLLAR_EMPLOYEE DEFINITIO

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_bluecollar_employee definition

inheriting from lcl_comp_emp.

public section .

methods :

constructor

importing im_no type i

im_name type string

im_hours type i

im_hourly_payment type i,

lif_emp~add_emp redefinition.

private section .

data : no type i,

name type string,

hours type i,

hourly_payment type i.

endclass. "LCL_BLUECOLLAR_EMPLOYEE DEFINITIO

*----------------------------------------------------------------------*

* CLASS LCL_BLUECOLLAR_EMPLOYEE IMPLEMENTATION

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_bluecollar_employee implementation .

method constructor .

call method super->constructor .

no = im_no .

name = im_name .

hours = im_hours .

hourly_payment = im_hourly_payment .

endmethod . "CONSTRUCTOR

method lif_emp~add_emp .

data : l_wage type i .

l_wage = hours * hourly_payment.

call method super->lif_emp~add_emp

exporting

im_no = no

im_name = name

im_wage = l_wage.

endmethod . "ADD_EMP

endclass. "LCL_BLUECOLLAR_EMPLOYEE IMPLEMENTATION

*----------------------------------------------------------------------*

* CLASS LCL_WHITECOLLAR_EMPLOYEE DEFINITIO

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_whitecollar_employee definition

inheriting from lcl_comp_emp.

public section.

methods :

constructor

importing im_no type i

im_name type string

im_monthly_salary type i

im_monthly_deducations type i ,

lif_emp~add_emp redefinition.

private section .

data : no type i,

name type string,

monthly_salary type i,

monthly_deducations type i.

endclass . "LCL_WHITECOLLAR_EMPLOYEE DEFINITIO

*----------------------------------------------------------------------*

* CLASS LCL_WHITECOLLAR_EMPLOYEE IMPLEMENTATION

*----------------------------------------------------------------------*

*

*----------------------------------------------------------------------*

class lcl_whitecollar_employee implementation .

method constructor .

call method super->constructor.

no = im_no.

name = im_name.

monthly_salary = im_monthly_salary.

monthly_deducations = im_monthly_deducations.

endmethod . "CONSTRUCTOR

method lif_emp~add_emp.

data: l_wage type i.

l_wage = monthly_salary - monthly_deducations.

call method super->lif_emp~add_emp

exporting

im_no = no

im_name = name

im_wage = l_wage.

endmethod. "ADD_EMP

endclass. "LCL_WHITECOLLAR_EMPLOYEE IMPLEMENTATION

data: o_bluecollar_emp1 type ref to lcl_bluecollar_employee,

o_whitecollar_emp1 type ref to lcl_whitecollar_employee.

start-of-selection .

create object o_bluecollar_emp1

exporting

im_no = 1

im_name = 'TARAN'

im_hours = 38

im_hourly_payment = 75.

call method o_bluecollar_emp1->lif_emp~add_emp

exporting

im_no = 1

im_name = 'TARAN'

im_wage = 0.

create object o_whitecollar_emp1

exporting

im_no = 2

im_name = 'MANMEET'

im_monthly_salary = 10000

im_monthly_deducations = 2500.

call method o_whitecollar_emp1->lif_emp~add_emp

exporting

im_no = 2

im_name = 'MANMEET'

im_wage = 0.

call method o_whitecollar_emp1->display_emp_list.

call method o_whitecollar_emp1->display_no_of_emp.

Thanks for reply guys

Tarandeep Singh

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Interfaces in OO ABAP