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CLASS - Quick reference

Reference

Other versions: 7.31 | 7.40 | 7.54

Syntax Forms

Declaration Part

CLASS class DEFINITION [INHERITING FROM superclass]
                       [ABSTRACT]
                       [FINAL]
                       [CREATE {PUBLIC|PROTECTED|PRIVATE}]
                       [SHARED MEMORY ENABLED]
                       [FOR TESTING
                         [RISK LEVEL {CRITICAL|DANGEROUS|HARMLESS}]
                         [DURATION   {SHORT|MEDIUM|LONG}] ]
                       [[GLOBAL] FRIENDS [class1 class2 ...]
                                         [intf1 intf2 ...] ].
  [PUBLIC SECTION.
    [components]]
  [PROTECTED SECTION.
    [components]]
  [PRIVATE SECTION.
    [components]]
ENDCLASS.

Implementation Part

CLASS class IMPLEMENTATION.
  implementations
ENDCLASS.

Effect

Declares and implements a class class. In the declaration part, the components components of a class are declared in the visibility sections PUBLIC, PROTECTED, and PRIVATE SECTION, using ALIASES, [CLASS-]DATA, [CLASS-]METHODS, and [CLASS-]EVENTS. In the implementation part, all the concrete methods declared in the declaration part between METHOD and ENDMETHOD are implemented.

Additions

• INHERITING FROM superclass
  Defines class as a subclass of superclass.
• ABSTRACT
  Defines class as an abstract class, which cannot be instantiated.
• FINAL
  Defines class as a final class from which subclasses cannot be derived.
• CREATE {PUBLIC|PROTECTED|PRIVATE}
  Specifies whether the class class can be instantiated as public, protected, or in its package as private.
• SHARED MEMORY ENABLED
  Specifies that instances of the class can be stored in shared memory.
• FOR TESTING
  Defines a test class for ABAP Unit. The additions determine the test properties.
• [GLOBAL] FRIENDS [class1 class2 ...] [ intf2 ...]
  Describes other classes class1 class2 ... or interfaces intf1 intf2 ... as friends, which are permitted to access all components of class.