refactor

src/model/zcl_protobuf2_file.clas.abap

@@ -4,19 +4,15 @@ CLASS zcl_protobuf2_file DEFINITION PUBLIC.
 
     INTERFACES zif_protobuf2_artefact.
 
-    DATA mt_messages TYPE STANDARD TABLE OF REF TO zcl_protobuf2_message WITH EMPTY KEY.
-    DATA mt_enums TYPE STANDARD TABLE OF REF TO zcl_protobuf2_enum WITH EMPTY KEY.
+    DATA mt_artefacts TYPE STANDARD TABLE OF REF TO zif_protobuf2_artefact WITH EMPTY KEY.
 ENDCLASS.
 
 CLASS zcl_protobuf2_file IMPLEMENTATION.
 
   METHOD zif_protobuf2_artefact~serialize.
     rv_string = |syntax = "proto2";|.
-    LOOP AT mt_messages INTO DATA(lo_message).
-      rv_string = rv_string && |\n| && lo_message->zif_protobuf2_artefact~serialize( ).
-    ENDLOOP.
-    LOOP AT mt_enums INTO DATA(lo_enum).
-      rv_string = rv_string && |\n| && lo_enum->zif_protobuf2_artefact~serialize( ).
+    LOOP AT mt_artefacts INTO DATA(lo_artefact).
+      rv_string = rv_string && |\n| && lo_artefact->serialize( ).
     ENDLOOP.
   ENDMETHOD.
 

src/parser/zcl_protobuf2_parser.clas.abap

@@ -104,9 +104,9 @@ CLASS zcl_protobuf2_parser IMPLEMENTATION.
       DATA(lv_token) = io_stream->take_token( ).
       CASE lv_token.
         WHEN 'message'.
-          APPEND message( io_stream ) TO io_file->mt_messages.
+          APPEND message( io_stream ) TO io_file->mt_artefacts.
         WHEN 'enum'.
-          APPEND enum( io_stream ) TO io_file->mt_enums.
+          APPEND enum( io_stream ) TO io_file->mt_artefacts.
         WHEN OTHERS.
           WRITE: / 'todo, handle token:', lv_token.
           ASSERT 1 = 'todo'.

src/parser/zcl_protobuf2_parser.clas.testclasses.abap

@@ -29,7 +29,7 @@ CLASS ltcl_test IMPLEMENTATION.
 
     cl_abap_unit_assert=>assert_equals(
       exp = 3
-      act = lines( lo_file->mt_messages ) ).
+      act = lines( lo_file->mt_artefacts ) ).
 
     cl_abap_unit_assert=>assert_equals(
       exp = lv_proto