Home  Sample Code ABAP OO Using ABAP OO Methods
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Written by Anon.
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Sunday, 27 May 2007 |
REPORT demo_abap_objects_methods NO STANDARD PAGE HEADING.
************************************************************************
* Global Selection Screens
************************************************************************
SELECTION-SCREEN BEGIN OF: SCREEN 100 TITLE tit1, LINE.
PARAMETERS members TYPE i DEFAULT 10.
SELECTION-SCREEN END OF: LINE, SCREEN 100.
*-----------------------------------------------------------------------
SELECTION-SCREEN BEGIN OF: SCREEN 200 TITLE tit2.
PARAMETERS: drive RADIOBUTTON GROUP actn,
stop RADIOBUTTON GROUP actn,
gearup RADIOBUTTON GROUP actn,
geardown RADIOBUTTON GROUP actn.
SELECTION-SCREEN END OF: SCREEN 200.
************************************************************************
* Class Definitions
************************************************************************
CLASS: c_biker DEFINITION DEFERRED,
c_bicycle DEFINITION DEFERRED.
*-----------------------------------------------------------------------
CLASS c_team DEFINITION.
PUBLIC SECTION.
TYPES: biker_ref TYPE REF TO c_biker,
biker_ref_tab TYPE STANDARD TABLE OF biker_ref
WITH DEFAULT KEY,
BEGIN OF status_line_type,
flag(1) TYPE c,
text1(5) TYPE c,
id TYPE i,
text2(7) TYPE c,
text3(6) TYPE c,
gear TYPE i,
text4(7) TYPE c,
speed TYPE i,
END OF status_line_type.
CLASS-METHODS: class_constructor.
METHODS: constructor,
create_team,
selection,
execution.
PRIVATE SECTION.
CLASS-DATA: team_members TYPE i,
counter TYPE i.
DATA: id TYPE i,
status_line TYPE status_line_type,
status_list TYPE SORTED TABLE OF status_line_type
WITH UNIQUE KEY id,
biker_tab TYPE biker_ref_tab,
biker_selection LIKE biker_tab,
biker LIKE LINE OF biker_tab.
METHODS: write_list.
ENDCLASS.
*-----------------------------------------------------------------------
CLASS c_biker DEFINITION.
PUBLIC SECTION.
METHODS: constructor IMPORTING team_id TYPE i members TYPE i,
select_action,
status_line EXPORTING line TYPE c_team=>status_line_type.
PRIVATE SECTION.
CLASS-DATA counter TYPE i.
DATA: id TYPE i,
bike TYPE REF TO c_bicycle,
gear_status TYPE i VALUE 1,
speed_status TYPE i VALUE 0.
METHODS biker_action IMPORTING action TYPE i.
ENDCLASS.
*-----------------------------------------------------------------------
CLASS c_bicycle DEFINITION.
PUBLIC SECTION.
METHODS: drive EXPORTING velocity TYPE i,
stop EXPORTING velocity TYPE i,
change_gear IMPORTING change TYPE i
RETURNING value(gear) TYPE i
EXCEPTIONS gear_min gear_max.
PRIVATE SECTION.
DATA: speed TYPE i,
gear TYPE i VALUE 1.
CONSTANTS: max_gear TYPE i VALUE 18,
min_gear TYPE i VALUE 1.
ENDCLASS.
************************************************************************
* Class Implementations
************************************************************************
CLASS c_team IMPLEMENTATION.
METHOD class_constructor.
tit1 = 'Team members ?'.
CALL SELECTION-SCREEN 100 STARTING AT 5 3.
IF sy-subrc NE 0.
LEAVE PROGRAM.
ELSE.
team_members = members.
ENDIF.
ENDMETHOD.
METHOD constructor.
counter = counter + 1.
id = counter.
ENDMETHOD.
METHOD create_team.
DO team_members TIMES.
CREATE OBJECT biker EXPORTING team_id = id members = team_members.
APPEND biker TO biker_tab.
CALL METHOD biker->status_line IMPORTING line = status_line.
APPEND status_line TO status_list.
ENDDO.
ENDMETHOD.
METHOD selection.
CLEAR biker_selection.
DO.
READ LINE sy-index.
IF sy-subrc <> 0. EXIT. ENDIF.
IF sy-lisel+0(1) = 'X'.
READ TABLE biker_tab INTO biker INDEX sy-index.
APPEND biker TO biker_selection.
ENDIF.
ENDDO.
CALL METHOD write_list.
ENDMETHOD.
METHOD execution.
CHECK NOT biker_selection IS INITIAL.
LOOP AT biker_selection INTO biker.
CALL METHOD biker->select_action.
CALL METHOD biker->status_line IMPORTING line = status_line.
MODIFY TABLE status_list FROM status_line.
ENDLOOP.
CALL METHOD write_list.
ENDMETHOD.
METHOD write_list.
SET TITLEBAR 'TIT'.
sy-lsind = 0.
SKIP TO LINE 1.
POSITION 1.
LOOP AT status_list INTO status_line.
WRITE: / status_line-flag AS CHECKBOX,
status_line-text1,
status_line-id,
status_line-text2,
status_line-text3,
status_line-gear,
status_line-text4,
status_line-speed.
ENDLOOP.
ENDMETHOD.
ENDCLASS.
*-----------------------------------------------------------------------
CLASS c_biker IMPLEMENTATION.
METHOD constructor.
counter = counter + 1.
id = counter - members * ( team_id - 1 ).
CREATE OBJECT bike.
ENDMETHOD.
METHOD select_action.
DATA activity TYPE i.
tit2 = 'Select action for BIKE'.
tit2+24(3) = id.
CALL SELECTION-SCREEN 200 STARTING AT 5 15.
CHECK NOT sy-subrc GT 0.
IF gearup = 'X' OR geardown = 'X'.
IF gearup = 'X'.
activity = 1.
ELSEIF geardown = 'X'.
activity = -1.
ENDIF.
ELSEIF drive = 'X'.
activity = 2.
ELSEIF stop = 'X'.
activity = 3.
ENDIF.
CALL METHOD biker_action( activity ).
ENDMETHOD.
METHOD biker_action.
CASE action.
WHEN -1 OR 1.
CALL METHOD bike->change_gear
EXPORTING change = action
RECEIVING gear = gear_status
EXCEPTIONS gear_max = 1
gear_min = 2.
CASE sy-subrc.
WHEN 1.
MESSAGE i315(at) WITH 'BIKE' id
' is already at maximal gear!'.
WHEN 2.
MESSAGE i315(at) WITH 'BIKE' id
' is already at minimal gear!'.
ENDCASE.
WHEN 2.
CALL METHOD bike->drive IMPORTING velocity = speed_status.
WHEN 3.
CALL METHOD bike->stop IMPORTING velocity = speed_status.
ENDCASE.
ENDMETHOD.
METHOD status_line.
line-flag = space.
line-text1 = 'Biker'.
line-id = id.
line-text2 = 'Status:'.
line-text3 = 'Gear = '.
line-gear = gear_status.
line-text4 = 'Speed = '.
line-speed = speed_status.
ENDMETHOD.
ENDCLASS.
*-----------------------------------------------------------------------
CLASS c_bicycle IMPLEMENTATION.
METHOD drive.
speed = speed + gear * 10.
velocity = speed.
ENDMETHOD.
METHOD stop.
speed = 0.
velocity = speed.
ENDMETHOD.
METHOD change_gear.
gear = me->gear.
gear = gear + change.
IF gear GT max_gear.
gear = max_gear.
RAISE gear_max.
ELSEIF gear LT min_gear.
gear = min_gear.
RAISE gear_min.
ENDIF.
me->gear = gear.
ENDMETHOD.
ENDCLASS.
************************************************************************
* Global Program Data
************************************************************************
TYPES team TYPE REF TO c_team.
DATA: team_blue TYPE team,
team_green TYPE team,
team_red TYPE team.
DATA color(5) TYPE c.
************************************************************************
* Program events
************************************************************************
START-OF-SELECTION.
CREATE OBJECT: team_blue,
team_green,
team_red.
CALL METHOD: team_blue->create_team,
team_green->create_team,
team_red->create_team.
SET PF-STATUS 'TEAMLIST'.
WRITE ' Select a team! ' COLOR = 2.
*-----------------------------------------------------------------------
AT USER-COMMAND.
CASE sy-ucomm.
WHEN 'TEAM_BLUE'.
color = 'BLUE '.
FORMAT COLOR = 1 INTENSIFIED ON INVERSE ON.
CALL METHOD team_blue->selection.
WHEN 'TEAM_GREEN'.
color = 'GREEN'.
FORMAT COLOR = 5 INTENSIFIED ON INVERSE ON.
CALL METHOD team_green->selection.
WHEN 'TEAM_RED'.
color = 'RED '.
FORMAT COLOR = 6 INTENSIFIED ON INVERSE ON.
CALL METHOD team_red->selection.
WHEN 'EXECUTION'.
CASE color.
WHEN 'BLUE '.
FORMAT COLOR = 1 INTENSIFIED ON INVERSE ON.
CALL METHOD team_blue->selection.
CALL METHOD team_blue->execution.
WHEN 'GREEN'.
FORMAT COLOR = 5 INTENSIFIED ON INVERSE ON.
CALL METHOD team_green->selection.
CALL METHOD team_green->execution.
WHEN 'RED '.
FORMAT COLOR = 6 INTENSIFIED ON INVERSE ON.
CALL METHOD team_red->selection.
CALL METHOD team_red->execution.
ENDCASE.
ENDCASE.
************************************************************************
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