Exceptions are way to communicate that something went wrong. An exception is a problem that arises during the execution of a program. When an exception occurs the normal flow of the program is disrupted and the program application terminates abnormally, which is not recommended, therefore these exceptions are to be handled.
ABAP exception handling is built upon three keywords − RAISE, TRY, CATCH and CLEANUP.
Raising Exceptions
Which situations can raise an exception ?
SITUATIONS WHICH RAISES EXCEPTION
Situations on the top raises a condition which results in a situation which cannot be handled by a program and results in abrupt termination of the program. Let’s see a how a program handles this situation through latest syntax
In new ABAP and in eclipse we cannot write a report through SE38 and we need to create class
So let’s create a class and make sure to implement the interface if_oo_adt_classrun, you can read more about the interface if_oo_adt_classrun HERE.
CLASS zcl_exception_class DEFINITION
PUBLIC
FINAL
CREATE PUBLIC .
PUBLIC SECTION.
INTERFACES if_oo_adt_classrun .
PROTECTED SECTION.
PRIVATE SECTION.
ENDCLASS.
CLASS ZCL_EXCEPTION_CLASS IMPLEMENTATION.
METHOD if_oo_adt_classrun~main.
ENDMETHOD.
ENDCLASS.
Now we need to do the implementation, we will handle a situation where something is getting divided by 0, Here is the implementation is done in the global class and now our global class will look something like this
CLASS zcl_exception_class DEFINITION
PUBLIC
FINAL
CREATE PUBLIC .
PUBLIC SECTION.
INTERFACES if_oo_adt_classrun .
PROTECTED SECTION.
PRIVATE SECTION.
ENDCLASS.
CLASS ZCL_EXCEPTION_CLASS IMPLEMENTATION.
METHOD if_oo_adt_classrun~main.
CONSTANTS NUM1 TYPE I VALUE '10'.
CONSTANTS NUM2 TYPE I VALUE '0'.
TRY.
Data(num3) = NUM1 / Num2.
CATCH cx_sy_zerodivide.
out->write( `Method call failed number cannot be divided by 0` ).
ENDTRY.
ENDMETHOD.
ENDCLASS.
Note we could have done the same implementation in a local class and then in that case we would have to create a object of local class in global class and call the methods inside global class, that example would look something like this
Below is the global class
CLASS zcl_exception_class DEFINITION
PUBLIC
FINAL
CREATE PUBLIC .
PUBLIC SECTION.
INTERFACES if_oo_adt_classrun .
PROTECTED SECTION.
PRIVATE SECTION.
ENDCLASS.
CLASS ZCL_EXCEPTION_CLASS IMPLEMENTATION.
METHOD if_oo_adt_classrun~main.
CONSTANTS c_carrier_id TYPE /dmo/carrier_id VALUE 'LH'.
CONSTANTS c_connection_id TYPE /dmo/connection_id.
DATA connection TYPE REF TO lcl_connection.
DATA connections TYPE TABLE OF REF TO lcl_connection.
* Create Instance
**********************************************************************
connection = NEW #( ).
TRY.
connection->set_attributes(
EXPORTING
i_carrier_id = c_carrier_id
i_connection_id = c_connection_id
).
APPEND connection TO connections.
out->write( `Method call successful` ).
CATCH cx_abap_invalid_value.
out->write( `Method call failed` ).
ENDTRY.
ENDMETHOD.
ENDCLASS.
Implementation in local class
*"* use this source file for the definition and implementation of
*"* local helper classes, interface definitions and type
*"* declarations
*"* use this source file for the definition and implementation of
*"* local helper classes, interface definitions and type
*"* declarations
CLASS lcl_connection DEFINITION.
PUBLIC SECTION.
* Attributes
DATA carrier_id TYPE /dmo/carrier_id.
DATA connection_id TYPE /dmo/connection_id.
* Methods
METHODS set_attributes
IMPORTING
i_carrier_id TYPE /dmo/carrier_id DEFAULT 'LH'
i_Connection_id TYPE /dmo/connection_id
RAISING
cx_abap_invalid_value.
ENDCLASS.
CLASS lcl_connection IMPLEMENTATION.
METHOD set_attributes.
IF i_carrier_id IS INITIAL OR i_connection_id IS INITIAL.
RAISE EXCEPTION TYPE cx_abap_invalid_value.
ENDIF.
carrier_id = i_carrier_id.
connection_id = i_connection_id.
ENDMETHOD.
ENDCLASS.
Binarybuggs 