CLASS
Short Reference
ABAP Syntax:
Declaration Part of a Class
1 CLASS class DEFINITION [ class_options
].
[PUBLIC SECTION.
[ components ]]
[PROTECTED SECTION.
[ components ]]
[PRIVATE SECTION.
[ components ]]
ENDCLASS.
Implementation Part of a Class
2 CLASS class IMPLEMENTATION.
...
METHOD ...
...
ENDMETHOD.
...
ENDCLASS.
Publication of Classes
3 CLASS class DEFINITION DEFERRED [PUBLIC].
Local Friends of Global Classes
4
CLASS class DEFINITION
LOCAL FRIENDS class1 class2 ...
intf1 intf2 ... .
What does it do? The statement CLASS defines a class class ,
publishes it, or specifies properties.
The complete definition of a class consists of a
declaration part and an
implementation part , which are both
introduced by CLASS and ended by ENDCLASS . In the
declaration part, the properties of the class are specified and its
components are declared. In the implementation part, the methods of the
class are implemented.
The variants of CLASS without ENDCLASS are used for the
publication of classes in a program and the
declaration of local friends of a global
class.
The statements CLASS and associated statements ENDCLASS
can be specified only in the global context of a program. CLASS
and ENDCLASS cannot be specified within classes, procedures, and
processing blocks implemented internally as a procedure (event blocks
for GET and AT
SELECTION-SCREEN ). This applies in particular to the variants of
CLASS specified here, which is not closed using ENDCLASS .
Latest notes: The declaration part of a class, and the variants of
CLASS not closed using ENDCLASS are handled like other
declaration statements ( DATA , TYPE , ...). In a processing
block without a local context, they are handled like global program
declarations and do not end the processing block.
Overall, the implementation part of a class functions like a separate
processing block and closes other processing blocks.
The obsolete variant CLASS ...
DEFINITION LOAD was formerly used to load classes explicitly.
Documentation extract taken from SAP system, � Copyright SAP AG. All rights reserved