How To Fix OO182 - Static methods cannot be redefined

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 182

• Message text: Static methods cannot be redefined

Self-Explanatory Message

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• What is the cause and solution for SAP error message OO182 - Static methods cannot be redefined ?

  The SAP error message OO182, which states "Static methods cannot be redefined," typically occurs in ABAP Object-Oriented programming when there is an attempt to override a static method in a subclass that was defined in a superclass. In ABAP, static methods belong to the class itself rather than to instances of the class, and as such, they cannot be overridden in subclasses.
  Cause:
  The error arises when:
  
  You have a static method defined in a superclass.
  You attempt to define a method with the same name in a subclass, intending to override it.
  
  Solution:
  To resolve this error, you should consider the following approaches:
  
  
  Rename the Method: If you need a different implementation in the subclass, consider renaming the method in the subclass instead of trying to override it.
  
  
  Use Instance Methods: If the behavior you want to achieve requires polymorphism (i.e., the ability to override), consider changing the static method to an instance method. This way, you can override it in subclasses.
  
  
  Call the Superclass Method: If you need to use the functionality of the superclass's static method, you can call it directly from the subclass without redefining it.
  
  
  Related Information:
  
  Static Methods: In ABAP, static methods are defined using the CLASS-METHODS statement and are called using the class name (e.g., ClassName=>MethodName()).
  Instance Methods: Instance methods are defined using the METHODS statement and can be overridden in subclasses.
  Polymorphism: This is a key concept in object-oriented programming that allows methods to be defined in a base class and overridden in derived classes, but it only applies to instance methods, not static methods.
  
  Example:
  Here’s a simple example to illustrate the issue:
  CLASS super_class DEFINITION.
    PUBLIC SECTION.
      CLASS-METHODS: static_method.
  ENDCLASS.
  
  CLASS super_class IMPLEMENTATION.
    METHOD static_method.
      WRITE 'This is a static method in the superclass'.
    ENDMETHOD.
  ENDCLASS.
  
  CLASS sub_class DEFINITION INHERITING FROM super_class.
    PUBLIC SECTION.
      CLASS-METHODS: static_method. " This will cause OO182 error
  ENDCLASS.
  
  CLASS sub_class IMPLEMENTATION.
    METHOD static_method.
      WRITE 'This is a static method in the subclass'.
    ENDMETHOD.
  ENDCLASS.
  In the above example, attempting to redefine static_method in sub_class will trigger the OO182 error. To fix it, you can either rename the method in sub_class or change the method to an instance method.
  By following these guidelines, you should be able to resolve the OO182 error effectively.