How To Fix OO084 - You cannot assign a direct type for public attributes

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 084

• Message text: You cannot assign a direct type for public attributes

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO084 - You cannot assign a direct type for public attributes ?

  The SAP error message OO084 ("You cannot assign a direct type for public attributes") typically occurs in ABAP Object-Oriented programming when you attempt to declare a public attribute in a class with a direct data type that is not allowed. This is often related to the way ABAP handles data types in the context of object-oriented programming.
  Cause:
  The error arises when you try to declare a public attribute in a class with a direct type that is not permissible. In ABAP, public attributes must be defined with reference types or must be defined in a way that they can be properly managed by the ABAP runtime environment. Direct types (like simple data types) are not allowed for public attributes because they can lead to issues with encapsulation and data integrity.
  Solution:
  To resolve this error, you should change the declaration of the public attribute to use a reference type or a more appropriate data type. Here are some common solutions:
  
  
  Use Reference Types: Instead of using a direct type, declare the attribute as a reference type. For example, if you want to use a string, you can declare it as a reference to a string type:
  CLASS my_class DEFINITION.
    PUBLIC SECTION.
      DATA: my_string TYPE REF TO string.
  ENDCLASS.
  
  
  Use Data Types from Domain: If you need to use a specific data type, consider defining a domain or a data element in the Data Dictionary and then use that in your class definition.
  
  
  Use Private Attributes: If the attribute does not need to be public, consider declaring it as a private attribute. This allows you to use direct types without encountering the error:
  CLASS my_class DEFINITION.
    PRIVATE SECTION.
      DATA: my_integer TYPE i.
  ENDCLASS.
  
  
  Encapsulation: If you need to expose the attribute, consider using getter and setter methods to encapsulate the access to the attribute. This way, you can keep the attribute private and control how it is accessed and modified.
  
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for more details on object-oriented programming in ABAP, especially regarding data types and class definitions.
  Encapsulation Principles: Understanding the principles of encapsulation in object-oriented programming can help you design your classes more effectively and avoid such errors.
  SAP Community: Engaging with the SAP Community forums can provide additional insights and solutions from other developers who may have encountered similar issues.
  
  By following these guidelines, you should be able to resolve the OO084 error and properly define your class attributes in ABAP.