Learning tips for Object Oriented ABAP

Hi Gurus,
I am in ABAP for last 1 year,
I want to learn Object oriented ABAP can you please guide me where to start.
Some learning material etc.
Regards
Bikas

Normal ABAP is process oriented, where is OOP-ABAP is a new methodology in ABAP which uses object oriented programming.
we have C++, java, C#, etc as OOP languages.
ABAP has also implemented the OOP technology.
it uses classes, methods and interfaces instead of functiongroups and function modules.
As part of SAPs long-standing commitment to object technology, Release 4.0
of R/3 will contain object-oriented enhancements to the ABAP programming
language. SAPs object strategy is based on SAP Business Objects and now
covers modeling, programming, interfacing, and workflow. By using principles
like encapsulation, inheritance, and polymorphism, the object-oriented
extensions of ABAP will support real object-oriented development. This will
result in improvements in the areas of reusability, maintenance, and quality of
code. SAP offers an evolutionary approach toward objects which leverages
SAPs own and its customers investments in existing business processes,
functionality and data.
OO ABAP
http://www.sapgenie.com/abap/OO/eg.htm
http://www.sapgenie.com/abap/OO/syntax.htm
http://www.sapgenie.com/abap/OO/index.htm
http://www.sapgenie.com/abap/OO/defn.htm
Detailed
OOPS OO ABAP
http://esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
http://esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
http://esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
http://esnips.com/doc/92be4457-1b6e-4061-92e5-8e4b3a6e3239/Object-Oriented-ABAP.ppt
http://esnips.com/doc/448e8302-68b1-4046-9fef-8fa8808caee0/abap-objects-by-helen.pdf
http://esnips.com/doc/39fdc647-1aed-4b40-a476-4d3042b6ec28/class_builder.ppt
http://www.amazon.com/gp/explorer/0201750805/2/ref=pd_lpo_ase/102-9378020-8749710?ie=UTF8
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
REward points if useful.

Similar Messages

I want to learn more about OOABAP(Object Oriented ABAP)

Hi All,
Please could anybody help me in sending some of material or suggestion in learning(Exploring) the Object Oriented ABAP. Right now I am an ABAP/4 Developer.
Please if anybody having any such material please send it to my mail-id i.e [email protected] or else please tell me the resources to learn the OOABAP please.
Now I have to work on that project. Thanks in advance.
By
ASHOK
If anything PDF format material please could you upload to my mail ID [email protected]
Message was edited by: ashok vanga

Hi ashok,
check this link....
http://www.intelligententerprise.com/channels/applications/feature/archive/heymann.jhtml?_requestid=304802
http://www.henrikfrank.dk/abapuk.html
http://sap.ittoolbox.com/documents/document.asp?i=982
reward points for helpfull answers and close the thread if your question is solved.
regards,
venu.

Material for Object Oriented Concepts in ABAP

Hi,
Please provide me the material for Object Oriented Concepts in ABAP.

Hi
Please check this link, may be helpful
http://www.sap-img.com/ab029.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/c3/225b5654f411d194a60000e8353423/frameset.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/c3/225b5654f411d194a60000e8353423/content.htm
regards
Srinivas

Issue with internal table in object oriented ABAP.

Hello Gurus,
I am having trouble defining internal table in Object oriented ABAP. for following:
DATA: BEGIN OF IT_TAB OCCURS 0.
        INCLUDE STRUCTURE ZCUSTOM.
DATA    tot_sum   TYPE char40.
DATA END OF IT_TAB.
Can someone help ?
Regards,
Jainam.
Edited by: Jainam Shah on Feb 5, 2010 8:33 PM
Edited by: Jainam Shah on Feb 5, 2010 8:33 PM
Moderator message - Please post in the correct forum. You can easily find out for yourself by looking at SAP help for internal tables using OOP - thread locked
Edited by: Rob Burbank on Feb 5, 2010 2:49 PM

No, you can not declare internal table with header line in OO context. You have to declare the work are/header line separately
Example:
TYPES: BEGIN OF ty_it_tab.
        INCLUDE STRUCTURE mara.
TYPES: tot_sum TYPE char40.
TYPES: END OF ty_it_tab.
DATA: it_tab TYPE STANDARD TABLE OF ty_it_tab.
DATA: wk_tab TYPE ty_it_tab.
LOOP AT it_tab INTO wk_tab.
ENDLOOP.
Edited by: Dean Q on Feb 5, 2010 8:50 PM

Object oriented abap

hello abapers,
am new to object oriented abap.cud u pls help me out in explaining me object oriented abap with examples.cud u also pls send me some links related to OO ABAP..
explanation wid suitable examples will b rewarded higher pints.
regards,
praveen

Hi,
please find the below material with examples,
reward points if helpful.
Public attributes
Public attributes are defined in the PUBLIC section and can be viewed and changed from outside the class. There is direct access to public attributes. As a general rule, as few public attributes should be defined as possible.
PUBLIC SECTION.
DATA: Counter type i.
Private attributes
Private attributes are defined in the PRIVATE section. The can only be viewes and changed from within the class. There is no direct access from outside the class.
PRIVATE SECTION.
 DATA: name(25) TYPE c,
 planetype LIKE saplane-planetyp,
Instance attributes
There exist one instance attribute for each instance of the class, thus they exist seperately for each object. Instance attributes are declared with the DATA keyword.
Static attributes
Static attributes exist only once for each class. The data are the same for all instances of the class, and can be used e.g. for instance counters. Static attributes are defined with the keyword CLASS-DATA.
PRIVATE SECTION.
CLASS-DATA: counter type i,
Public methods
Can called from outside the class
PUBLIC SECTION.
METHODS: set_attributes IMPORTING p_name(25) TYPE c,
 p_planetype LIKE saplane-planetyp,
Private methods
Can only be called from inside the class. They are placed in the PRIVATE section of the class.
Constructor method
Implicitly, each class has an instance constructor method with the reserved name constructor and a static constructor method with the reserved name class_constructor.
The instance constructor is executed each time you create an object (instance) with the CREATE OBJECT statement, while the class constructor is executed exactly once before you first access a class.
The constructors are always present. However, to implement a constructor you must declare it explicitly with the METHODS or CLASS-METHODS statements. An instance constructor can have IMPORTING parameters and exceptions. You must pass all non-optional parameters when creating an object. Static constructors have no parameters.
Static constructor
The static constructor is always called CLASS_CONSTRUCTER, and is called autmatically before the clas is first accessed, that is before any of the following actions are executed:
 Creating an instance using CREATE_OBJECT
 Adressing a static attribute using
 Calling a ststic attribute using CALL METHOD
 Registering a static event handler
 Registering an evetm handler method for a static event
The static constructor cannot be called explicitly.
Protected components
When we are talking subclassing and enheritance there is one more component than Public and Private, the Protected component. Protected components can be used by the superclass and all of the subclasses. Note that Subclasses cannot access Private components.
Polymorphism
Polymorphism: When the same method is implemented differently in different classes. This can be done using enheritance, by redefining a method from the superclass in subclasses and implement it differently.
Template for making a class
Delete the parts that should not be used
Definition part
CLASS xxx DEFINITION.
Public section
PUBLIC SECTION.
 TYPES:
 DATA:
Static data
 CLASS-DATA:
Methods
 METHODS:
 Using the constructor to initialize parameters
 constructor IMPORTING xxx type yyy,
 Method with parameters
 mm1 IMPORTING iii TYPE ttt.
 Method without parameters
 mm2.
Static methods
 CLASS-METHODS:
Protected section. Also accessable by subclasses
PROTECTED SECTION.
Private section. Not accessable by subclasses
PRIVATE SECTION.
ENDCLASS.
Implementation part
CLASS lcl_airplane IMPLEMENTATION.
METHOD constructor.
ENDMETHOD.
METHOD mm1.
ENDMETHOD.
METHOD mm2.
ENDMETHOD.
ENDCLASS.
Template for calling a class
Create reference to class lcl_airplane
DATA: airplane1 TYPE REF TO lcl_airplane.
START-OF-SELECTION.
Create instance using parameters in the cosntructor method
CREATE OBJECT airplane1 exporting im_name = 'Hansemand'
 im_planetype = 'Boing 747'.
Calling a method with parameters
CALL METHOD: airplane1->display_n_o_airplanes,
 airplane1->display_attributes.
Subclass
CLASS xxx DEFINITION INHERITING FROM yyy.
Using af class as a parameter for a method
The class LCL_AIRPLANE is used as a parameter for method add_a_new_airplane:
METHODS:
add_a_new_airplane importing im_airplane TYPE REF to lcl_airplane.
Interfaces
In ABAP interfaces are implemented in addition to, and independently of classes. An interface only has a declaration part, and do not have visibillity sections. Components (Attributes, methods, constants, types) can be defined the same way as in classes.
 Interfaces are listed in the definition part lof the class, and must always be in the PUBLIC SECTION.
 Operations defined in the interface atre impemented as methods of the class. All methods of the interface must be present in the
 implementation part of the class.
 Attributes, events, constants and types defined in the interface are automatically available to the class carying out the implementation.
 Interface components are adresse in the class by ]
Define, implement and use simple class
***INCLUDE ZBC404_HF_LCL_AIRPLANE .
Definition part
CLASS lcl_airplane DEFINITION.
Public section
PUBLIC SECTION.
 TYPES: t_name(25) TYPE c.
 METHODS:
 constructor,
 set_attributes IMPORTING p_name TYPE t_name
 p_planetype TYPE saplane-planetype,
 display_attributes,
 display_n_o_airplanes.
Private section
PRIVATE SECTION.
Private attributes
 DATA: name(25) TYPE c,
 planetype TYPE saplane-planetype.
Private static attribute
 CLASS-DATA n_o_airplanes TYPE i.
ENDCLASS.
Implementation part
CLASS lcl_airplane IMPLEMENTATION.
METHOD constructor.
Counts number of instances
 n_o_airplanes = n_o_airplanes + 1.
ENDMETHOD.
METHOD set_attributes.
 name = p_name.
 planetype = p_planetype.
ENDMETHOD.
METHOD display_attributes.
 WRITE:/ 'Name:', name, 'Planetype:', planetype.
ENDMETHOD.
METHOD display_n_o_airplanes.
 WRITE: / 'No. planes:', n_o_airplanes.
ENDMETHOD.
ENDCLASS.
REPORT zbc404_hf_maintain_airplanes .
INCLUDE zbc404_hf_lcl_airplane.
Create reference to class lcl_airplane
DATA: airplane1 TYPE REF TO lcl_airplane,
 airplane2 TYPE REF TO lcl_airplane.
START-OF-SELECTION.
Create instance
CREATE OBJECT airplane1.
CALL METHOD: airplane1->display_n_o_airplanes.
CREATE OBJECT airplane2.
Setting attributes using a method with parameters
CALL METHOD airplane1->set_attributes EXPORTING p_name = 'Kurt'
 p_planetype = 'MD80'.
END-OF-SELECTION.
Using methods
CALL METHOD: airplane1->display_n_o_airplanes,
 airplane1->display_attributes.
The resulting report:
Maintain airplanes
No. planes: 1
No. planes: 2
Name: Kurt Planetype: MD80
Use constructor to create an object with parameters
CLASS lcl_airplane DEFINITION.
PUBLIC SECTION.
 TYPES: t_name(25) TYPE c.
 METHODS:
 constructor importing p2_name type t_name
 p2_planetype TYPE saplane-planetype,
..... more code .......
CLASS lcl_airplane IMPLEMENTATION.
METHOD constructor.
 name = p2_name.
 planetype = p2_planetype.
..... more code .......
START-OF-SELECTION.
CREATE OBJECT airplane1 exporting p2_name = 'Hansemand'
 p2_planetype = 'Boing 747'.
Subclassing
This example uses a superclass LCL_AIRPLANE and subclasses it into LCL_PASSENGER_AIRPLANE and LCL_CARGO_PLANE.
LCL_AIRPLANE has a method display_n_o_airplanes that displays the number of object instances.
LCL_PASSENGER_AIRPLANE has the private instance attribute n_o_seats, and redefines the superclass method display_attributes, so it also displays n_o_seats.
LCL_CARGO_PLANE has the private instance attribute cargomax, and redefines the superclass method display_attributes, so it also displays cargomax.
All instance attributes are provided by the cunstructor method.
Superclass LCL_AIRPLANE
***INCLUDE ZBC404_HF_LCL_AIRPLANE .
Definition part
CLASS lcl_airplane DEFINITION.
Public section
PUBLIC SECTION.
 TYPES: t_name(25) TYPE c.
 METHODS:
 constructor IMPORTING im_name TYPE t_name
 im_planetype TYPE saplane-planetype,
 display_attributes.
Static methods
 CLASS-METHODS:
 display_n_o_airplanes.
Protected section
PROTECTED SECTION.
Private attributes
 DATA: name(25) TYPE c,
 planetype TYPE saplane-planetype.
Private static attribute
 CLASS-DATA n_o_airplanes TYPE i.
ENDCLASS.
Implementation part
CLASS lcl_airplane IMPLEMENTATION.
METHOD constructor.
 name = im_name.
 planetype = im_planetype.
Counts number of instances
 n_o_airplanes = n_o_airplanes + 1.
ENDMETHOD.
METHOD display_attributes.
 WRITE:/ 'Name:', name, 'Planetype:', planetype.
ENDMETHOD.
METHOD display_n_o_airplanes.
 WRITE: / 'No. planes:', n_o_airplanes.
ENDMETHOD.
ENDCLASS.
Sub class LCL_PASSENGER_AIRPLANE
***INCLUDE ZBC404_HF_LCL_PASSENGER_PLANE .
This is a subclass of class lcl_airplane
CLASS lcl_passenger_airplane DEFINITION INHERITING FROM lcl_airplane.
PUBLIC SECTION.
The constructor contains the parameters from the superclass
plus the parameters from the subclass
 METHODS:
 constructor IMPORTING im_name TYPE t_name
 im_planetype TYPE saplane-planetype
 im_n_o_seats TYPE sflight-seatsmax,
 Redefinition of superclass method display_attributes
 display_attributes REDEFINITION.
PRIVATE SECTION.
 DATA: n_o_seats TYPE sflight-seatsmax.
ENDCLASS.
CLASS lcl_passenger_airplane IMPLEMENTATION.
METHOD constructor.
The constructor method of the superclass MUST be called withing the
construtor
 CALL METHOD super->constructor
 EXPORTING im_name = im_name
 im_planetype = im_planetype.
 n_o_seats = im_n_o_seats.
ENDMETHOD.
The redefined display_attributes method
METHOD display_attributes.
 CALL METHOD super->display_attributes.
 WRITE: / 'No. seats:', n_o_seats.
ENDMETHOD.
ENDCLASS.
Sub class LCL_CARGO_PLANE
***INCLUDE ZBC404_HF_LCL_CARGO_PLANE .
This is a subclass of class lcl_airplane
CLASS lcl_cargo_plane DEFINITION INHERITING FROM lcl_airplane.
PUBLIC SECTION.
 METHODS:
 The constructor contains the parameters from the superclass
 plus the parameters from the subclass
 constructor IMPORTING im_name TYPE t_name
 im_planetype TYPE saplane-planetype
 im_cargomax type scplane-cargomax,
 Redefinition of superclass method display_attributes
 display_attributes REDEFINITION.
PRIVATE SECTION.
 DATA:cargomax TYPE scplane-cargomax.
ENDCLASS.
CLASS lcl_cargo_plane IMPLEMENTATION.
METHOD constructor.
The constructor method of the superclass MUST be called withing the
constructor
 CALL METHOD super->constructor
 EXPORTING im_name = im_name
 im_planetype = im_planetype.
 cargomax = im_cargomax.
ENDMETHOD.
METHOD display_attributes.
The redefined display_attributes method
 CALL METHOD super->display_attributes.
 WRITE: / 'Cargo max:', cargomax.
ENDMETHOD.
ENDCLASS.
The Main program that uses the classes
REPORT zbc404_hf_main .
Super class
INCLUDE zbc404_hf_lcl_airplane.
Sub classes
INCLUDE zbc404_hf_lcl_passenger_plane.
INCLUDE zbc404_hf_lcl_cargo_plane.
DATA:
Type ref to sub classes. Note: It is not necesssary to make typeref to the superclass
o_passenger_airplane TYPE REF TO lcl_passenger_airplane,
o_cargo_plane TYPE REF TO lcl_cargo_plane.
START-OF-SELECTION.
Display initial number of instances = 0
CALL METHOD lcl_airplane=>display_n_o_airplanes.
Create objects
CREATE OBJECT o_passenger_airplane
 EXPORTING
 im_name = 'LH505'
 im_planetype = 'Boing 747'
 im_n_o_seats = 350.
CREATE OBJECT o_cargo_plane
 EXPORTING
 im_name = 'AR13'
 im_planetype = 'DC 3'
 im_cargomax = 35.
Display attributes
CALL METHOD o_passenger_airplane->display_attributes.
CALL METHOD o_cargo_plane->display_attributes.
Call static method display_n_o_airplanes
Note: The syntax for calling a superclass method, differs from the syntax when calling a subclass method.
When calling a superclass => must be used instead of ->
CALL METHOD lcl_airplane=>display_n_o_airplanes.
Result:
No. planes: 0
Name: LH505 Planetype: Boing 747
No. seats: 350
Name: AR13 Planetype: DC 3
Cargo max: 35,0000
No. planes: 2
Polymorphism
Polymorphism: When the same method is implemented differently in different classes. This can be done using enheritance, by redefining a method from the superclass in subclasses and implement it differently.
Classes:
 lcl_airplane Superclass
 lcl_cargo_airplane Subclass
 lcl_passenger_airplane Subclass
The method estimate_fuel_consumption is implemented differently in the 3 classes, as it depends on the airplane type.
Object from different classes are stored in an internal table (plane_list) consisting of references to the superclass, and the processed
identically for all the classes.
What coding for the estimate_fuel_consumption method taht is actually executed, depends on the dynamic type of the plane reference variable,
that is, depends on which object plane points to.
DATA: cargo_plane TYPE REF to lcl_cargo_airplane,
 passenger_plane TYPE REF to lcl_passenger_airplane,
 plane_list TYPE TABLE OF REF TO lcl_airplane.
Creating the list of references
CREATE OBJECT cargo_plane.
APPEND cargo_plane to plane_list.
CREATE OBJECT passenger_plane
APPEND passenger_plane to plane list.
Generic method for calucalting required fuel
METHOD calculate required_fuel.
DATA: plane TYPE REF TO lcl_airplane.
LOOP AT plane_list INTO plane.
 re_fuel = re_fuel + plane->estimate_fuel_consumption( distance ).
ENDLOOP.
ENDMETHOD.
Working example:
This example assumes that the classes lcl_airplane, lcl_passnger_airplane and lcl_cargo plane (Se Subcallsing) exists.
Create objects of type lcl_cargo_plane and lcl_passenger_airplane, adds them to a list in lcl_carrier, and displays the list.
*& Include ZBC404_HF_LCL_CARRIER *
 CLASS lcl_carrier DEFINITION *
CLASS lcl_carrier DEFINITION.
PUBLIC SECTION.
 TYPES: BEGIN OF flight_list_type,
 connid TYPE sflight-connid,
 fldate TYPE sflight-fldate,
 airplane TYPE REF TO lcl_airplane,
 seatsocc TYPE sflight-seatsocc,
 cargo(5) TYPE p DECIMALS 3,
 END OF flight_list_type.
 METHODS: constructor IMPORTING im_name TYPE string,
 get_name RETURNING value(ex_name) TYPE string,
 add_a_new_airplane IMPORTING
 im_airplane TYPE REF TO lcl_airplane,
 create_a_new_flight importing
 im_connid type sflight-connid
 im_fldate type sflight-fldate
 im_airplane type ref to lcl_airplane
 im_seatsocc type sflight-seatsocc
 optional
 im_cargo type p optional,
 display_airplanes.
PRIVATE SECTION.
 DATA: name TYPE string,
 list_of_airplanes TYPE TABLE OF REF TO lcl_airplane,
 list_of_flights TYPE TABLE OF flight_list_type.
ENDCLASS.
 CLASS lcl_carrier IMPLEMENTATION
CLASS lcl_carrier IMPLEMENTATION.
METHOD constructor.
 name = im_name.
ENDMETHOD.
METHOD get_name.
 ex_name = name.
ENDMETHOD.
METHOD create_a_new_flight.
 DATA: wa_list_of_flights TYPE flight_list_type.
 wa_list_of_flights-connid = im_connid.
 wa_list_of_flights-fldate = im_fldate.
 wa_list_of_flights-airplane = im_airplane.
 IF im_seatsocc IS INITIAL.
 wa_list_of_flights-cargo = im_cargo.
 ELSE.
 wa_list_of_flights-seatsocc = im_seatsocc.
 ENDIF.
 APPEND wa_list_of_flights TO list_of_flights.
ENDMETHOD.
METHOD add_a_new_airplane.
 APPEND im_airplane TO list_of_airplanes.
ENDMETHOD.
METHOD display_airplanes.
 DATA: l_airplane TYPE REF TO lcl_airplane.
 LOOP AT list_of_airplanes INTO l_airplane.
 CALL METHOD l_airplane->display_attributes.
 ENDLOOP.
ENDMETHOD.
ENDCLASS.
REPORT zbc404_hf_main .
This reprort uses class LCL_AIRPLNAE and subclasses
LCL_CARGO_PLANE and LCL_PASSENGER_AIRPLANE and class LCL_CARRIER
Super class for airplanes
INCLUDE zbc404_hf_lcl_airplane.
Sub classes for airplanes
INCLUDE zbc404_hf_lcl_passenger_plane.
INCLUDE zbc404_hf_lcl_cargo_plane.
Carrier class
INCLUDE zbc404_hf_lcl_carrier.
DATA:
Type ref to classes
o_passenger_airplane TYPE REF TO lcl_passenger_airplane,
o_passenger_airplane2 TYPE REF TO lcl_passenger_airplane,
o_cargo_plane TYPE REF TO lcl_cargo_plane,
o_cargo_plane2 TYPE REF TO lcl_cargo_plane,
o_carrier TYPE REF TO lcl_carrier.
START-OF-SELECTION.
Create objects
CREATE OBJECT o_passenger_airplane
 EXPORTING
 im_name = 'LH505'
 im_planetype = 'Boing 747'
 im_n_o_seats = 350.
CREATE OBJECT o_passenger_airplane2
 EXPORTING
 im_name = 'SK333'
 im_planetype = 'MD80'
 im_n_o_seats = 110.
CREATE OBJECT o_cargo_plane
 EXPORTING
 im_name = 'AR13'
 im_planetype = 'DC 3'
 im_cargomax = 35.
CREATE OBJECT o_cargo_plane2
 EXPORTING
 im_name = 'AFL124'
 im_planetype = 'Iljutsin 2'
 im_cargomax = 35000.
CREATE OBJECT o_carrier
 EXPORTING im_name = 'Spritisch Airways'.
Add passenger and cargo planes to the list of airplanes
CALL METHOD o_carrier->add_a_new_airplane
 EXPORTING im_airplane = o_passenger_airplane.
CALL METHOD o_carrier->add_a_new_airplane
 EXPORTING im_airplane = o_passenger_airplane2.
CALL METHOD o_carrier->add_a_new_airplane
 EXPORTING im_airplane = o_cargo_plane.
CALL METHOD o_carrier->add_a_new_airplane
 EXPORTING im_airplane = o_cargo_plane2.
Display list of airplanes
call method o_carrier->display_airplanes.
Result:
Name: LH505 Planetype: Boing 747
No. seats: 350
Name: SK333 Planetype: MD80
No. seats: 110
Name: AR13 Planetype: DC 3
Cargo max: 35,0000
Name: AFL124 Planetype: Iljutsin 2
Cargo max: 35.000,0000
Events
Below is a simple example of how to implement an event.
REPORT zbc404_hf_events_5.
 CLASS lcl_dog DEFINITION
CLASS lcl_dog DEFINITION.
PUBLIC SECTION.
Declare events
 EVENTS:
 dog_is_hungry
 EXPORTING value(ex_time_since_last_meal) TYPE i.
 METHODS:
 constructor
 IMPORTING im_name TYPE string,
 set_time_since_last_meal
 IMPORTING im_time TYPE i,
 on_dog_is_hungry FOR EVENT dog_is_hungry OF lcl_dog
 IMPORTING ex_time_since_last_meal.
ENDCLASS.
 CLASS lcl_dog IMPLEMENTATION
CLASS lcl_dog IMPLEMENTATION.
METHOD constructor.
 WRITE: / 'I am a dog and my name is', im_name.
ENDMETHOD.
METHOD set_time_since_last_meal.
 IF im_time < 4.
 SKIP 1.
 WRITE: / 'You fool, I am not hungry yet'.
 ELSE.
 Subsrcribe for event:
 set handler <Event handler method>
 FOR <ref_sender>!FOR ALL INSTANCES [ACTIVATION <var>]
 SET HANDLER on_dog_is_hungry FOR ALL INSTANCES ACTIVATION 'X'.
 Raise event
 RAISE EVENT dog_is_hungry
 EXPORTING ex_time_since_last_meal = im_time.
 ENDIF.
ENDMETHOD.
METHOD on_dog_is_hungry.
Event method, called when the event dog_is_hungry is raised
 SKIP 1.
 WRITE: / 'You son of a *****. I have not eaten for more than',
 ex_time_since_last_meal, ' hours'.
 WRITE: / 'Give me something to eat NOW!'.
ENDMETHOD.
ENDCLASS.
 R E P O R T
DATA: o_dog1 TYPE REF TO lcl_dog.
START-OF-SELECTION.
CREATE OBJECT o_dog1 EXPORTING im_name = 'Beefeater'.
CALL METHOD o_dog1->set_time_since_last_meal
 EXPORTING im_time = 2.
This method call will raise the event dog_is_hungy
because time > 3
CALL METHOD o_dog1->set_time_since_last_meal
 EXPORTING im_time = 5.
Result:
I am a dog and my name is Beefeater
You fool, I am not hungry yet
You son of a *****. I have not eaten for more than 5 hours
Give me something to eat NOW!
1. Simple class
This example shows how to create a simple employee class. The constructor method is used to initialize number and name of thje employee when the object is created. A display_employee method can be called to show the attributes of the employee, and CLASS-METHOD dosplay_no_of_employees can be called to show the total number of employees (Number of instances of the employee class).
REPORT zbc404_hf_events_1.
L C L _ E M P L O Y E E
*---- LCL Employee - Definition
CLASS lcl_employee DEFINITION.
PUBLIC SECTION.
The public section is accesible from outside
 TYPES:
 BEGIN OF t_employee,
 no TYPE i,
 name TYPE string,
 END OF t_employee.
 METHODS:
 constructor
 IMPORTING im_employee_no TYPE i
 im_employee_name TYPE string,
 display_employee.
Class methods are global for all instances
 CLASS-METHODS: display_no_of_employees.
PROTECTED SECTION.
The protecetd section is accesible from the class and its subclasses
Class data are global for all instances
 CLASS-DATA: g_no_of_employees TYPE i.
PRIVATE SECTION.
The private section is only accesible from within the classs
 DATA: g_employee TYPE t_employee.
ENDCLASS.
*--- LCL Employee - Implementation
CLASS lcl_employee IMPLEMENTATION.
METHOD constructor.
 g_employee-no = im_employee_no.
 g_employee-name = im_employee_name.
 g_no_of_employees = g_no_of_employees + 1.
ENDMETHOD.
METHOD display_employee.
 WRITE:/ 'Employee', g_employee-no, g_employee-name.
ENDMETHOD.
METHOD display_no_of_employees.
 WRITE: / 'Number of employees is:', g_no_of_employees.
ENDMETHOD.
ENDCLASS.
R E P O R T
DATA: g_employee1 TYPE REF TO lcl_employee,
 g_employee2 TYPE REF TO lcl_employee.
START-OF-SELECTION.
CREATE OBJECT g_employee1
 EXPORTING im_employee_no = 1
 im_employee_name = 'John Jones'.
CREATE OBJECT g_employee2
 EXPORTING im_employee_no = 2
 im_employee_name = 'Sally Summer'.
CALL METHOD g_employee1->display_employee.
CALL METHOD g_employee2->display_employee.
CALL METHOD g_employee2->display_no_of_employees.
2. Inheritance and polymorphism
This example uses a superclass lcl_company_employees and two subclasses lcl_bluecollar_employee and lcl_whitecollar_employee to add employees to a list and then display a list of employees and there wages. The wages are calcukated in the method add_employee, but as the wages are calculated differently for blue collar employees and white collar emplyees, the superclass method add_employee is redeifined in the subclasses.
Principles:
Create super class LCL_CompanyEmployees.
The class has the methods:
 Constructor
 Add_Employee - Adds a new employee to the list of employees
 Display_Employee_List - Displays all employees and there wage
 Display_no_of_employees - Displays total number of employees
Note the use of CLASS-DATA to keep the list of employees and number of employees the same from instance to instance.
Create subclasses lcl_bluecollar_employee and lcl_whitecollar_employee. The calsses are identical, except for the redifinition of the add_employee method, where the caclculation of wage is different.
Methodes:
 Constructor. The constructor is used to initialize the attributes of the employee. Note that the constructor in the supclasss has to be called from within the constructor of the subclass.
 Add_Employee. This is a redinition of the same method in the superclass. In the redefined class the wage is calcuated, and the superclass method is called to add the employees to the emploee list.:
The program
REPORT zbc404_hf_events_2 .
Super class LCL_CompanyEmployees
CLASS lcl_company_employees DEFINITION.
PUBLIC SECTION.
 TYPES:
 BEGIN OF t_employee,
 no TYPE i,
 name TYPE string,
 wage TYPE i,
 END OF t_employee.
 METHODS:
 constructor,
 add_employee
 IMPORTING im_no TYPE i
 im_name TYPE string
 im_wage TYPE i,
 display_employee_list,
 display_no_of_employees.
PRIVATE SECTION.
 CLASS-DATA: i_employee_list TYPE TABLE OF t_employee,
 no_of_employees TYPE i.
ENDCLASS.
*-- CLASS LCL_CompanyEmployees IMPLEMENTATION
CLASS lcl_company_employees IMPLEMENTATION.
METHOD constructor.
 no_of_employees = no_of_employees + 1.
ENDMETHOD.
METHOD add_employee.
Adds a new employee to the list of employees
 DATA: l_employee TYPE t_employee.
 l_employee-no = im_no.
 l_employee-name = im_name.
 l_employee-wage = im_wage.
 APPEND l_employee TO i_employee_list.
ENDMETHOD.
METHOD display_employee_list.
Displays all employees and there wage
 DATA: l_employee TYPE t_employee.
 WRITE: / 'List of Employees'.
 LOOP AT i_employee_list INTO l_employee.
 WRITE: / l_employee-no, l_employee-name, l_employee-wage.
 ENDLOOP.
ENDMETHOD.
METHOD display_no_of_employees.
Displays total number of employees
 SKIP 3.
 WRITE: / 'Total number of employees:', no_of_employees.
ENDMETHOD.
ENDCLASS.
Sub class LCL_BlueCollar_Employee
CLASS lcl_bluecollar_employee DEFINITION
 INHERITING FROM lcl_company_employees.
PUBLIC SECTION.
 METHODS:
 constructor
 IMPORTING im_no TYPE i
 im_name TYPE string
 im_hours TYPE i
 im_hourly_payment TYPE i,
 add_employee REDEFINITION.
PRIVATE SECTION.
 DATA:no TYPE i,
 name TYPE string,
 hours TYPE i,
 hourly_payment TYPE i.
ENDCLASS.
*---- CLASS LCL_BlueCollar_Employee IMPLEMENTATION
CLASS lcl_bluecollar_employee IMPLEMENTATION.
METHOD constructor.
The superclass constructor method must be called from the subclass
constructor method
 CALL METHOD super->constructor.
 no = im_no.
 name = im_name.
 hours = im_hours.
 hourly_payment = im_hourly_payment.
ENDMETHOD.
METHOD add_employee.
Calculate wage an call the superclass method add_employee to add
the employee to the employee list
 DATA: l_wage TYPE i.
 l_wage = hours * hourly_payment.
 CALL METHOD super->add_employee
 EXPORTING im_no = no
 im_name = name
 im_wage = l_wage.
ENDMETHOD.
ENDCLASS.
Sub class LCL_WhiteCollar_Employee
CLASS lcl_whitecollar_employee DEFINITION
 INHERITING FROM lcl_company_employees.
PUBLIC SECTION.
 METHODS:
 constructor
 IMPORTING im_no TYPE i
 im_name TYPE string
 im_monthly_salary TYPE i
 im_monthly_deductions TYPE i,
 add_employee REDEFINITION.
PRIVATE SECTION.
 DATA:
 no TYPE i,
 name TYPE string,
 monthly_salary TYPE i,
 monthly_deductions TYPE i.
ENDCLASS.
*---- CLASS LCL_WhiteCollar_Employee IMPLEMENTATION
CLASS lcl_whitecollar_employee IMPLEMENTATION.
METHOD constructor.
The superclass constructor method must be called from the subclass
constructor method
 CALL METHOD super->constructor.
 no = im_no.
 name = im_name.
 monthly_salary = im_monthly_salary.
 monthly_deductions = im_monthly_deductions.
ENDMETHOD.
METHOD add_employee.
Calculate wage an call the superclass method add_employee to add
the employee to the employee list
 DATA: l_wage TYPE i.
 l_wage = monthly_salary - monthly_deductions.
 CALL METHOD super->add_employee
 EXPORTING im_no = no
 im_name = name
 im_wage = l_wage.
ENDMETHOD.
ENDCLASS.
R E P O R T
DATA:
Object references
o_bluecollar_employee1 TYPE REF TO lcl_bluecollar_employee,
o_whitecollar_employee1 TYPE REF TO lcl_whitecollar_employee.
START-OF-SELECTION.
Create bluecollar employee obeject
CREATE OBJECT o_bluecollar_employee1
 EXPORTING im_no = 1
 im_name = 'Gylle Karen'
 im_hours = 38
 im_hourly_payment = 75.
Add bluecollar employee to employee list
CALL METHOD o_bluecollar_employee1->add_employee
 EXPORTING im_no = 1
 im_name = 'Gylle Karen'
 im_wage = 0.
Create whitecollar employee obeject
CREATE OBJECT o_whitecollar_employee1
 EXPORTING im_no = 2
 im_name = 'John Dickens'
 im_monthly_salary = 10000
 im_monthly_deductions = 2500.
Add bluecollar employee to employee list
CALL METHOD o_whitecollar_employee1->add_employee
 EXPORTING im_no = 1
 im_name = 'Karen Johnson'
 im_wage = 0.
Display employee list and number of employees. Note that the result
will be the same when called from o_whitecollar_employee1 or
o_bluecolarcollar_employee1, because the methods are defined
as static (CLASS-METHODS)
CALL METHOD o_whitecollar_employee1->display_employee_list.
CALL METHOD o_whitecollar_employee1->display_no_of_employees.
The resulting report
List of Employees
1 Karen Johnson 2.850
2 John Dickens 7.500
Total number of employees: 2
3. Interfaces
This example is similiar to th eprevious example, however an interface is implemented with the method add_employee. Note that the interface is only implemented in the superclass ( The INTERFACE stament), but also used in the subclasses.
The interface in the example only contains a method, but an iterface can also contain attrbutes, constants, types and alias names.
The output from example 3 is similiar to the output in example 2.
All changes in the program compared to example 2 are marked with red.
REPORT zbc404_hf_events_3 .
 INTERFACE lif_employee
INTERFACE lif_employee.
METHODS:
 add_employee
 IMPORTING im_no TYPE i
 im_name TYPE string
 im_wage TYPE i.
ENDINTERFACE.
Super class LCL_CompanyEmployees
CLASS lcl_company_employees DEFINITION.
PUBLIC SECTION.
 INTERFACES lif_employee.
 TYPES:
 BEGIN OF t_employee,
 no TYPE i,
 name TYPE string,
 wage TYPE i,
 END OF t_employee.
 METHODS:
 constructor,
 add_employee "Removed
 IMPORTING im_no TYPE i
 im_name TYPE string
 im_wage TYPE i,
 display_employee_list,
 display_no_of_employees.
PRIVATE SECTION.
 CLASS-DATA: i_employee_list TYPE TABLE OF t_employee,
 no_of_employees TYPE i.
ENDCLASS.
*-- CLASS LCL_CompanyEmployees IMPLEMENTATION
CLASS lcl_company_employees IMPLEMENTATION.
METHOD constructor.
 no_of_employees = no_of_employees + 1.
ENDMETHOD.
METHOD lif_employee~add_employee.
Adds a new employee to the list of employees
 DATA: l_employee TYPE t_employee.
 l_employee-no = im_no.
 l_employee-name = im_name.
 l_employee-wage = im_wage.
 APPEND l_employee TO i_employee_list.
ENDMETHOD.
METHOD display_employee_list.
Displays all employees and there wage
 DATA: l_employee TYPE t_employee.
 WRITE: / 'List of Employees'.
 LOOP AT i_employee_list INTO l_employee.
 WRITE: / l_employee-no, l_employee-name, l_employee-wage.
 ENDLOOP.
ENDMETHOD.
METHOD display_no_of_employees.
Displays total number of employees
 SKIP 3.
 WRITE: / 'Total number of employees:', no_of_employees.
ENDMETHOD.
ENDCLASS.
Sub class LCL_BlueCollar_Employee
CLASS lcl_bluecollar_employee DEFINITION
 INHERITING FROM lcl_company_employees.
PUBLIC SECTION.
 METHODS:
 constructor
 IMPORTING im_no TYPE i
 im_name TYPE string
 im_hours TYPE i
 im_hourly_payment TYPE i,
 lif_employee~add_employee REDEFINITION..
PRIVATE SECTION.
 DATA:no TYPE i,
 name TYPE string,
 hours TYPE i,
 hourly_payment TYPE i.
ENDCLASS.
*---- CLASS LCL_BlueCollar_Employee IMPLEMENTATION
CLASS lcl_bluecollar_employee IMPLEMENTATION.
METHOD constructor.
The superclass constructor method must be called from the subclass
constructor method
 CALL METHOD super->constructor.
 no = im_no.
 name = im_name.
 hours = im_hours.
 hourly_payment = im_hourly_payment.
ENDMETHOD.
METHOD lif_employee~add_employee.
Calculate wage an call the superclass method add_employee to add
the employee to the employee list
 DATA: l_wage TYPE i.
 l_wage = hours * hourly_payment.
 CALL METHOD super->lif_employee~add_employee
 EXPORTING im_no = no
 im_name = name
 im_wage = l_wage.
ENDMETHOD.
ENDCLASS.
Sub class LCL_WhiteCollar_Employee
CLASS lcl_whitecollar_employee DEFINITION
 INHERITING FROM lcl_company_employees.
PUBLIC SECTION.
 METHODS:
 constructor
 IMPORTING im_no TYPE i
 im_name TYPE string
 im_monthly_salary TYPE i
 im_monthly_deductions TYPE i,
 lif_employee~add_employee REDEFINITION.
PRIVATE SECTION.
 DATA:
 no TYPE i,
 name TYPE string,
 monthly_salary TYPE i,
 monthly_deductions TYPE i.
ENDCLASS.
*---- CLASS LCL_WhiteCollar_Employee IMPLEMENTATION
CLASS lcl_whitecollar_employee IMPLEMENTATION.
METHOD constructor.
The superclass constructor method must be called from the subclass
constructor method
 CALL METHOD super->constructor.
 no = im_no.
 name = im_name.
 monthly_salary = im_monthly_salary.
 monthly_deductions = im_monthly_deductions.
ENDMETHOD.
METHOD lif_employee~add_employee.
Calculate wage an call the superclass method add_employee to add
the employee to the employee list
 DATA: l_wage TYPE i.
 l_wage = monthly_salary - monthly_deductions.
 CALL METHOD super->lif_employee~add_employee
 EXPORTING im_no = no
 im_name = name
 im_wage = l_wage.
ENDMETHOD.
ENDCLASS.
R E P O R T
DATA:
Object references
o_bluecollar_employee1 TYPE REF TO lcl_bluecollar_employee,
o_whitecollar_employee1 TYPE REF TO lcl_whitecollar_employee.
START-OF-SELECTION.
Create bluecollar employee obeject
CREATE OBJECT o_bluecollar_employee1
 EXPORTING im_no = 1
 im_name = 'Gylle Karen'
 im_hours = 38
 im_hourly_payment = 75.
Add bluecollar employee to employee list
CALL METHOD o_bluecollar_employee1->lif_employee~add_employee
 EXPORTING im_no = 1
 im_name = 'Karen Johnson'
 im_wage = 0.
Create whitecollar employee obeject
CREATE OBJECT o_whitecollar_employee1
 EXPORTING im_no = 2
 im_name = 'John Dickens'
 im_monthly_salary = 10000
 im_monthly_deductions = 2500.
Add bluecollar employee to employee list
CALL METHOD o_whitecollar_employee1->lif_employee~add_employee
 EXPORTING im_no = 1
 im_name = 'Gylle Karen'
 im_wage = 0.
Display employee list and number of employees. Note that the result
will be the same when called from o_whitecollar_employee1 or
o_bluecolarcollar_employee1, because the methods are defined
as static (CLASS-METHODS)
CALL METHOD o_whitecollar_employee1->display_employee_list.
CALL METHOD o_whitecollar_employee1->display_no_of_employees.
4. Events
This is the same example as example 4. All changes are marked with red. There have been no canges to the subclasses, only to the superclass and the report, sp the code for th esubclasses is not shown.
For a simple example refer to Events in Examples.
REPORT zbc404_hf_events_4 .
 INTERFACE lif_employee
INTERFACE lif_employee.
METHODS:
 add_employee
 IMPORTING im_no TYPE i
 im_name TYPE string
 im_wage TYPE i.
ENDINTERFACE.
Super class LCL_CompanyEmployees
CLASS lcl_company_employees DEFINITION.
PUBLIC SECTION.
 TYPES:
 BEGIN OF t_employee,
 no TYPE i,
 name TYPE string,
 wage TYPE i,
 END OF t_employee.
Declare event. Note that declaration could also be placed in the
interface

Documents of Object Oriented ABAP

I need some documentation of Object Oriented ABAP, Please send the same

hi,
some helful links.
Go through the below links,
For Materials:
1) http://help.sap.com/printdocu/core/Print46c/en/data/pdf/BCABA/BCABA.pdf -- Page no: 1291
2) http://esnips.com/doc/5c65b0dd-eddf-4512-8e32-ecd26735f0f2/prefinalppt.ppt
3) http://esnips.com/doc/2c76dc57-e74a-4539-a20e-29383317e804/OO-abap.pdf
4) http://esnips.com/doc/0ef39d4b-586a-4637-abbb-e4f69d2d9307/SAP-CONTROLS-WORKSHOP.pdf
5) http://esnips.com/doc/92be4457-1b6e-4061-92e5-8e4b3a6e3239/Object-Oriented-ABAP.ppt
6) http://esnips.com/doc/448e8302-68b1-4046-9fef-8fa8808caee0/abap-objects-by-helen.pdf
7) http://esnips.com/doc/39fdc647-1aed-4b40-a476-4d3042b6ec28/class_builder.ppt
8) http://www.amazon.com/gp/explorer/0201750805/2/ref=pd_lpo_ase/102-9378020-8749710?ie=UTF8
1) http://www.erpgenie.com/sap/abap/OO/index.htm
2) http://help.sap.com/saphelp_nw04/helpdata/en/ce/b518b6513611d194a50000e8353423/frameset.htm
rgds'
Anver

Debugging a Module Pool Program(Object Oriented ABAP)

Hello Experts,
Could you please advise me on an efficient debugging technoque of Module Pool Program which is based on Object Oriented ABAP?

Hi
Debugging Module pool program using ABAP objects is same as debugging any other report/module pool program.
Click on the Create shortcut icon on the toolbar.
In the popup window choose "System command" and in the command enter "/h"
A shortcut on the desktop would be created
Drag and drop the shortcut to the modal window to set debugging on.
Approach 2:
Create a txt file on the desktop with the following lines:
[FUNCTION]
Command=/H
Title=Debugger
Type=SystemCommandDrag and drop this file to the modal window to set debugging on.
How do I switch between the Classic and New Debugger
From within the ABAP workbench, select the Utilities->Settings Menu
Select the ABAP Editor Tab
Select the Debugging tab within the ABAP Editor Tab
Select the Classic Debugger or New Debugger radio button
Refer to this thread
http://help.sap.com/saphelp_47x200/helpdata/en/c6/617ca9e68c11d2b2ab080009b43351/content.htm
Debugging
Check these documents.
http://www.cba.nau.edu/haney-j/CIS497/Assignments/Debugging.doc
http://help.sap.com/saphelp_nw04/helpdata/en/5a/4ed93f130f9215e10000000a155106/frameset.htm
http://help.sap.com/saphelp_47x200/helpdata/en/c6/617ca9e68c11d2b2ab080009b43351/content.htm
http://www.cba.nau.edu/haney-j/CIS497/Assignments/Debugging.doc
http://help.sap.com/saphelp_erp2005/helpdata/en/b3/d322540c3beb4ba53795784eebb680/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/84/1f624f4505144199e3d570cf7a9225/frameset.htm
http://help.sap.com/saphelp_bw30b/helpdata/en/c6/617ca9e68c11d2b2ab080009b43351/content.htm
http://help.sap.com/saphelp_erp2005/helpdata/en/b3/d322540c3beb4ba53795784eebb680/frameset.htm
ABAP Debugging
http://www.saplinks.net/index.php?option=com_content&task=view&id=24&Itemid=34
Look at the SAP help link below
http://help.sap.com/saphelp_nw2004s/helpdata/en/c6/617ca9e68c11d2b2ab080009b43351/content.htm
Reward points if useful
Regards
Anji

Is polymorphism a bad design for object oriented concept?

i think polymorphism is bad concept for object oriented concept..having the same name with different parameter function ..according to my opinion may constitue in efficient skill in programming..instead if using the same name why we cannot use different name...for example each human being will have have unique characterstics..(i.e each persons DNA would be different..)so why can't we have different function names.. even if u choose a username to create a new account it would not support same names..i think it is confusing .. i think this concept is lessly used in modern programming usage... as it has less usage i think the future language designs should not support polymorphism..
i just want to know ur opnions..

Is it just me or did Sun fuck up the posting screens?I didn't notice anything; care to enlighten me?800-pixels-wide window and still a vertical scrollbar, but, to make up for
that, 250 pixels of unused whitespace to the left. And the search text
field is still unnamed.I agree with that rediculously wide left margin, i.e. rearranging some of
those things would allow for a better screen estate usage. But didn't Sun
already give us that crap in a previous incarnation of their mannah?
Besides that, I still don't notice any difference ...
kind regards,
Jos (<--- call me a silly ignoramus)

Anyone recommends a good book for object oriented programming

I am a college student in computer engineering (Software) and have been programming using Java for over a year. I have become really interested in the design of softwares and the "beauty" of object oriented programming, and thus would like to advance my knowledge about the topic (my university offers an advanced oop class but I would have to wait another 6 months to take it). So my question is, could you recommend me any book that covers the subject of object oriented programming extensively? (I have learned most of the oop I know from "An Introduction to Programming and Object Oriented Design Using Java" by Nino and Hosch.
Thanks in advance

Some years ago I remember cutting my teeth on OOP using an excellent book by Grady Booch. If it's still in print and has been updated, it may be worth a look. Again it was decent. Also consider picking up a book on design patterns. Good luck.
Edit: I found it, it's called "Object-Oriented Analysis and Design with Applications", and it's in its third edition. You can find it here on Amazon.
Edited by: Encephalopathic on Apr 22, 2008 2:48 PM

Anyone recommends a good book for object oriented programming (advanced)

I am a college student in computer engineering (Software) and have been programming using Java for over a year. I have become really interested in the design of softwares and the "beauty" of object oriented programming, and thus would like to advance my knowledge about the topic (my university offers an advanced oop class but I would have to wait another 6 months to take it). So my question is, could you recommend me any book that covers the subject of object oriented programming extensively? (I have learned most of the oop I know from "An Introduction to Programming and Object Oriented Design Using Java" by Nino and Hosch.
Thanks in advance

jwenting wrote:
I never tire of pushing ["Agile Software Development, Principles, Patterns, and Practices "|http://www.amazon.com/Software-Development-Principles-Patterns-Practices/dp/0135974445] by Robert Martin.
You probably meant [Agile Software Development, Principles, Patterns, and Practices|http://www.amazon.com/Software-Development-Principles-Patterns-Practices/dp/0135974445] ;-)
Remember, quotes in link names break the forum ...

Error for object oriented alv running in background.

Hi all,
I have an ALV report done using object oriented functionality.
When I am trying to run that report in background , it is giving me error.
I want to know why it is happening and how it can be corrected.
Regards,
 Vaibhav.

Create a docky container :
c_docking_cont TYPE REF TO cl_gui_docking_container.
 *For background execution
 IF sy-batch EQ c_x.
 CREATE OBJECT c_alv
 EXPORTING
 i_parent = c_docking_cont.
 ENDIF.
 ALV for display field details
 CALL METHOD c_alv->set_table_for_first_display
 EXPORTING
 is_layout = t_lay
 CHANGING
 it_outtab = t_table[]
 it_fieldcatalog = t_field_cat.
 IF sy-subrc <> 0.
 MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
 WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
 ENDIF.
Edited by: Madhavi t on Nov 2, 2009 1:34 PM

Declaration Error for Object orient Programming

Hi All,
can any tell me how to export Select-options .This is an object oriented question
include ztest.
select-options   : s_werks for marc-werks obligatory,
                   s_matnr for mara-matnr obligatory.
data : O_object type ref to lcl_test.
start-of-selection.
CREATE OBJECT O_object EXPORTING IM_S_WERKS[] IN S_WERKS[]
                                 IM_S_LGORT[] in s_matnr[].
Above statment is the problem
This is my include ztest.
CLASS lcl_test DEFINITION.
METHODS constructor IMPORTING IMWERKS[]   TYPE MARC-WERKS
                               imLGORT[]   TYPE MARD-LGORT.
Above statment is the problem
endclass.
Can anyone tell me how to declare
Thanks
Adi

Hi Rich,
This is what i have
start-of-selection.
CREATE OBJECT O_IMARD EXPORTING IM_WERKS = S_WERKS[].
CLASS lcl_par DEFINITION.
public section.
TYPES: t_werks TYPE RANGE OF werks.
DATA: r_werks TYPE t_werks.
*types : begin of iwerks ,
*SIGN(2) type c,
*OPTION(2) type c,
*low(4) type c,
*high(4) type c,
*end of iwerks.
METHODS: constructor IMPORTING im_werks TYPE t_werks.
endclass.
CLASS lcl_par implementation.
METHOD constructor.
r_werks = im_werks.
endmethod.
endclass.
My PROGRAM THROWS AN ERROR SAYINGS
S_WERKS IS NOT COMPATABILE WITH IM_WERKS
Let me know whats the issue in here
Thanks
Adi

Tips for a new ABAP programmer...

Hello experts,
I am a fairly new ABAP programmer that usually modifies existing reports. I am really having a hard time on understanding all those synatx. Can you guys give me tips on how to better understand reports/programs?how do you analyze reports? any tips and suggestions would really helpful to me.Thanks a lot guys!

Hi,
No Problem dont worry SDN will help you a lot.
Actually every one is new for the new technologies.
Actually here as an ABAPer 1st try to learn DE-BUGGING as much as you can.
Try to do it from START-OF-SELECTION event 1st line on wards.
Put a break point on start of selection line event and execute it.
Here in debugging you need to carefully observe the behaviour of the program, logic etc etc.
Next understand the FORMS when they are triging and their reusability.
Under stand the Events sequence.
Later try to obsorbe the Syntax of the commands as much as you can.
Thanks.
If this helps you reward with points.

Object-oriented + ABAP Objects

Hello friends,
I would like to know, is it possible in ABAP Objects to do the followings:
Single Inheritance
Multiple Inheritance
Polymorphism
Data Abstration
Method Overloading, and method Overriding
Inner Classes ?
Would be nice if some one highlights some of the features of ABAP Objects, in comparision or in regards to JAVA or so...
Many thanks in advance...

Hi,
In ABAP : We do have final concept!
There are differencies between 'Local Classes' created in abap wihtin One program : for example Handler for ALV Grid
And Repository classes : Created in the repository available for any program!
Multi threading can be done via asynchronous Function module or with event!
greetz!
Thanks for small-> Big reward!

Object Oriented ABAP Materials please

Hi All,
Can Any send me the good document link for studying
OOP's ABAP.
I'll be grateful to U,if U could do the help.

Horst Keller and Joachim Jacobitz have a wonderful two volume book called ABAP Objects: The Official Reference.
You can order it and download a very valuable chapter by visiting:
http://www.sap-press.com/product.cfm?account=&product=H958
More information about BC401 - ABAP Objects - may be obtained by visiting the Education Page:
http://www.sap.com/education
Specific ABAP Objects course information is found at:
http://www11.sap.com/services/education/teamtraining/netweaver.epx
Cheers,
Marilyn

Learning tips for Object Oriented ABAP

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