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• DEFERRED CLASS • PUBLIC CLASS DEFERRED
CLASS, DEFERRED Short Reference
ABAP_SYNTAX CLASS class DEFINITION DEFERRED $[PUBLIC$].
What does it do? This variant of the statement CLASS is used to make the class class known temporarily in the program, regardless of the location of the actual definition of the class in the program. It does not introduce a declaration part and must not be closed using ENDCLASS.
Without the addition PUBLIC, the statement makes a local class of its actual definition known before its actual definition. The program must contain a declaration part for class at a later point. It is not possible to access individual components before the actual definition. The statement is necessary if a reference to a local class is to be made before it is defined.
Using the addition PUBLIC, it makes a global class known and delays loading the class until the end of the current program unit. Individual components of the class can only be accessed after it has been loaded. This statement can be used to prevent unwanted recursions when referring to global classes.
Latest notes: This variant of the statement CLASS can also only be listed in the context described under CLASS. NON_V5_HINTS ABAP_HINT_END
ABAP_EXAMPLE_VX5 In this example, the class c1 uses the class c2 and vice versa. This means that one of the classes must be made known before it is actually defined. ABEXA 00100 ABAP_EXAMPLE_END BEGIN_SECTION VERSION 5 OUT
Example ABAP Coding
An example of using the addition DEFERRED PUBLIC would be a type pool in which a reference type is declared with reference to a global class, which itself contains components with references to this reference type. In this situation, the entire class cannot be loaded before the type pool, since the types are not yet known. After the statement CLASS DEFINITION ... DEFERRED PUBLIC, however, the class name can be specified after REF TO without the class having been loaded previously. ABAP_EXAMPLE_END END_SECTION VERSION 5 OUT
