How To Fix OO614 - Maintain friendship to local classes in the local class include

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 614

• Message text: Maintain friendship to local classes in the local class include

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Friendship for local classes
You do not maintain friendships between local classes on the
<ZK>Friends</> tab of the Class Builder.
To grant a local class access to the private components of a global
class, you must include the following statement in the definition
include of that local class:
CLASS <global_classname> DEFINITION LOCAL FRIENDS
<local_classname_1> <local_classname_2> .... <(>
<<)>local_classname_n>.
mit : <global_classname> : Name of the global class
<local_classname_1...n> : Names of the local classes to which
you want to grant friendship

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO614 - Maintain friendship to local classes in the local class include ?

  The SAP error message OO614, which states "Maintain friendship to local classes in the local class include," typically occurs in ABAP when you are trying to access a local class from another local class without properly establishing a friendship relationship between them.
  Cause:
  In ABAP, local classes (defined within a specific program or include) cannot access each other's private or protected members unless they are declared as "friends." This is a design choice in object-oriented programming to encapsulate class data and methods. The error OO614 indicates that you are attempting to access a member of a local class that is not declared as a friend of the class you are currently working in.
  Solution:
  To resolve this error, you need to declare the classes as friends of each other. Here’s how you can do that:
  
  
  Open the Local Class Definition: Go to the class where you want to establish friendship.
  
  
  Add the FRIENDS Statement: In the class definition, you can add a FRIENDS statement to declare the other local class as a friend. For example:
  CLASS my_local_class DEFINITION
    FINAL
    FOR TESTING
    CREATE PUBLIC.
  
    FRIENDS my_other_local_class.
  
  ENDCLASS.
  
  
  Repeat for Other Classes: If necessary, repeat the process for the other local class to ensure that both classes can access each other's private and protected members.
  
  
  Check Access Modifiers: Ensure that you are accessing the members correctly according to their access modifiers (public, protected, private).
  
  
  Related Information:
  
  Local Classes: Local classes are defined within a specific program or include and are not visible outside of that context.
  Friendship in ABAP: The FRIENDS statement allows one class to access the private and protected members of another class, which is useful for tightly coupled classes that need to work closely together.
  Encapsulation: This concept is fundamental in object-oriented programming, ensuring that the internal state of an object is protected from unintended interference and misuse.
  
  Additional Tips:
  
  Always ensure that the classes you are trying to make friends are indeed local classes and are defined in the same program or include.
  If you are working with global classes, the friendship mechanism works differently, and you may need to consider other access control mechanisms.
  
  By following these steps, you should be able to resolve the OO614 error and successfully maintain the necessary relationships between your local classes.