Accessing impl class attribute

Hi Experts,
if i declare one variable in controller class of a view and how can access the variable in contex naode .

Hi srinivas.yangal,
You can access the View implementation Class Attributes in Context.
1] Go to Context Node Implementation Class
2] Create a attribute GV_VIEW_CONTROLLER in Impl class of Context Node.
DATA : GV_VIEW_CONTROLLER TYPE REF TO CL_BSP_WD_VIEW_CONTROLLER .
3] Go to INIT method of Context Node.
4] Assign instance LV_VIEW_CONTROLLER to GV_VIEW_CONTROLLER of Context Node Impl. Class.
GV_VIEW_CONTROLLER = LV_VIEW_CONTROLLER.
Then you can access your Instance attributes defined in View Impl. class inside the context node through GV_VIEW_CONTROLLER attribute as follows.
ABC = GV_VIEW_CONTROLLER->XYZ.
Reward points if useful.
Kind Regards,
Dhananjay.
Edited by: Dhananjay SAP CRM on Nov 24, 2011 12:56 PM

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Access to class-attribute by Interface-reference

Hi OO-Gurus,
I use an implementation of BADI ME_PROCESS_REQ_CUST to fill and handle user-defined fields in the MM-Purchase-Requisition, method IF_EX_ME_PROCESS_REQ_CUST~OPEN.
There I use a reference variable which refers to an interface (type ref to IF_PURCHASE_REQUISITION_ITEM) to access the item-object. My problem is that I need to have access to the class-attribute my_state. The corresponding class lcl_req_item is defined locally (LMEREQF01). So I cant use a reference variable with reference to this class (so widening cast using the interface-reference is not possible) .. Does anyone know a trick how to access the class-attribute anyway?
Coding:
data: l_item_list       TYPE MMPUR_REQUISITION_ITEMS,
           l_item             TYPE MMPUR_REQUISITION_ITEM,
           l_item_akt       TYPE mereq_item,
           l_item_ref        TYPE ref to IF_PURCHASE_REQUISITION_ITEM.
l_item_list = im_header->get_items().
loop at l_item_list into l_item.
    l_item_akt = l_item-item->get_data( ).
    l_item_ref = l_item-item.
endloop.
(Debugging the code, I manage by doubleclicking the fieldcontent of l_item_ref (e.g ) to show the content of the class-attribute my_state. This works only if the field Interface in the Debugger is empty because then I see the attributes of the class. If the field Interface is filled with IF_PURCHASE_REQUISITION_ITEM, there arent any attributes shown.)
Thanks in advance for your kind help!!
Nicole

Hello Nicole
The following sample coding shows you how to solve your problem. Please do not ask me how I came across this solution.
However, if you are studying it carefully you may stumble across a most beautiful property of field-symbols as I did.
METHOD if_ex_me_process_req_cust~open.
DATA: l_item_list TYPE mmpur_requisition_items,
l_item TYPE mmpur_requisition_item,
l_item_akt TYPE mereq_item,
l_item_ref TYPE REF TO if_purchase_requisition_item.
DATA:
    ld_attr         TYPE string,
    lo_obj          TYPE REF TO object.
FIELD-SYMBOLS:
    <lo_lcl>        TYPE ANY,
    <ls_item>       TYPE mereq_item,
    <ls_itemx>      TYPE mereq_itemx.
l_item_list = im_header->get_items( ).
LOOP AT l_item_list INTO l_item.
    l_item_akt = l_item-item->get_data( ).
    l_item_ref = l_item-item.
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    ASSIGN lo_obj->(ld_attr) TO <lo_lcl>.
    ld_attr = 'MY_STATE->ITEM'.
    ASSIGN lo_obj->(ld_attr) TO <ls_item>.
"    ASSIGN l_item_ref->(ld_attr) TO <ls_item>. " does not work...
    ld_attr = 'MY_STATE->ITEMX'.
    ASSIGN lo_obj->(ld_attr) TO <ls_itemx>.
ENDLOOP.
" NOTE: data definition of local class lcl_req_item_state (fg MEREQ)
**    DATA: item           TYPE mereq_item,
**           itemx          TYPE mereq_itemx,
**           header         TYPE REF TO lcl_req_header,
**           ref_item       TYPE REF TO lcl_req_item,
**           acct_container TYPE REF TO lcl_acct_container,
**           source         TYPE REF TO cl_source_of_supply_mm,
**           release_state TYPE REF TO cl_release_state_mm,
**           text_manager   TYPE REF TO lcl_text_manager,
**           bom            TYPE REF TO lcl_bom,
**           funds_mgt_active TYPE mmpur_bool VALUE mmpur_no,
**           aktyp          TYPE aktyp,
**           no_auth        TYPE mmpur_bool VALUE mmpur_no,
**           release_op     type mmpur_bool value mmpur_no,
**           persistent     TYPE mmpur_bool VALUE mmpur_no,
**           checked        TYPE mmpur_bool VALUE mmpur_no,
**           manual_configuration TYPE mmpur_bool,
**           input_buffer_changed TYPE mmpur_bool VALUE mmpur_no,
**           changed        TYPE mmpur_bool,
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**           referenced_rules TYPE lty_mask,
**           chp_changes    TYPE mmchp_chp_list,
**           dcm_manager    TYPE REF TO if_revision_manager_dcm,
**           "DCM Retrofit
**           rel_state_after_release TYPE REF TO cl_release_state_mm,
**           "DCM Retrofit
**           chdoc_container TYPE REF TO lcl_chdoc_container,
**           "DCM Retrofit
**           service_changed TYPE mmpur_bool,
**           "DCM Retrofit
**           determinants   TYPE lty_item_determinants.
ENDMETHOD.
Regards
Uwe

Access to class attributs by coding in its mother class method definition

Hi all,
How can I retrieve information about a class attributs by coding?
And is it possible to access to the attributs of the Child class from the Mother class?
REPORT ztest_method.
******      CLASS mother DEFINITION
CLASS mother DEFINITION.
PUBLIC SECTION.
    METHODS: get_data.
ENDCLASS.                    "mother DEFINITION
******      CLASS child DEFINITION
CLASS child DEFINITION inheriting from mother.
ENDCLASS.                    "child DEFINITION
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CLASS mother IMPLEMENTATION.
METHOD get_data.
***Can I access to child class attributs here?
ENDMETHOD.                    "get_data
ENDCLASS.                    "mother IMPLEMENTATION
DATA oref TYPE REF TO CHILD.
DATA: method TYPE string.
DATA: cla_name(20).
START-OF-SELECTION.
CREATE OBJECT oref .
CALL METHOD oref->method). "Here I want to access to this class's attribut without redefine it

Hi,
a very easy way is to define an attribute TYPE REF TO DATA in the super class and write generic access methods which work with it by dereferencing it and assigning a field symbol. This might even save you the effort of creating a class hierarchy, because one class may be able to handle all the data objects whose types are only known at run-time.
In the below example, the only specific thing about the sub class is the constructor in which the data object is created and typed:
REPORT ztesta.
*       CLASS lcl_mother DEFINITION
CLASS lcl_mother DEFINITION.
PUBLIC SECTION.
    METHODS get_data EXPORTING es_data TYPE any.
    METHODS set_data IMPORTING is_data TYPE any.
PROTECTED SECTION.
    DATA mr_data TYPE REF TO data.
ENDCLASS.                    "lcl_mother DEFINITION
*       CLASS lcl_child1 DEFINITION
CLASS lcl_child1 DEFINITION INHERITING FROM lcl_mother.
PUBLIC SECTION.
    METHODS constructor.
ENDCLASS.                    "lcl_child1 DEFINITION
DATA:
lr_child      TYPE REF TO lcl_mother,
ls_but000_in TYPE        but000,
ls_but000_out type        but000.
START-OF-SELECTION.
CREATE OBJECT lr_child TYPE lcl_child1.
ls_but000_in-partner = '0000004711'.
lr_child->set_data( ls_but000_in ).
lr_child->get_data( IMPORTING es_data = ls_but000_out ).
write: / ls_but000_out-partner.
*       CLASS lcl_mother IMPLEMENTATION
CLASS lcl_mother IMPLEMENTATION.
METHOD get_data.
    FIELD-SYMBOLS:
      <fs_data> TYPE ANY.
    ASSIGN mr_data->* TO <fs_data>.
    MOVE-CORRESPONDING <fs_data> TO es_data.
ENDMETHOD.                    "get_data
METHOD set_data.
    FIELD-SYMBOLS:
      <fs_data> TYPE ANY.
    ASSIGN mr_data->* TO <fs_data>.
    MOVE-CORRESPONDING is_data TO <fs_data>.
ENDMETHOD.                    "set_data
ENDCLASS.                    "lcl_mother IMPLEMENTATION
*       CLASS lcl_child1 IMPLEMENTATION
CLASS lcl_child1 IMPLEMENTATION.
METHOD constructor.
    super->constructor( ).
    CREATE DATA mr_data TYPE but000.
ENDMETHOD.                    "constructor
ENDCLASS.                    "lcl_child1 IMPLEMENTATION
Another variant would be to define an attribute MV_DATA which is typed individually in each sub class and program dynamically against it in the super class using field symbols.
*& Report ZTESTA
REPORT ztesta.
*       CLASS lcl_mother DEFINITION
CLASS lcl_mother DEFINITION.
PUBLIC SECTION.
    METHODS get_data EXPORTING es_data TYPE any.
    METHODS set_data IMPORTING is_data TYPE any.
ENDCLASS.                    "lcl_mother DEFINITION
*       CLASS lcl_child1 DEFINITION
CLASS lcl_child1 DEFINITION INHERITING FROM lcl_mother.
PUBLIC SECTION.
    DATA: ms_data TYPE but000.
    METHODS constructor.
ENDCLASS.                    "lcl_child1 DEFINITION
*       CLASS lcl_child2 DEFINITION
CLASS lcl_child2 DEFINITION INHERITING FROM lcl_mother.
PUBLIC SECTION.
    DATA: ms_data TYPE t000.
    METHODS constructor.
ENDCLASS.                    "lcl_child1 DEFINITION
DATA:
lr_child1     TYPE REF TO lcl_mother,
lr_child2     TYPE REF TO lcl_mother,
ls_but000     TYPE        but000,
ls_t000       TYPE        t000.
START-OF-SELECTION.
CREATE OBJECT lr_child1 TYPE lcl_child1.
lr_child1->get_data( IMPORTING es_data = ls_but000 ).
WRITE: / ls_but000-partner.
CREATE OBJECT lr_child2 TYPE lcl_child2.
lr_child2->get_data( IMPORTING es_data = ls_t000 ).
WRITE: / ls_t000-mwaer.
*       CLASS lcl_mother IMPLEMENTATION
CLASS lcl_mother IMPLEMENTATION.
METHOD get_data.
    FIELD-SYMBOLS:
      <fs_data> TYPE ANY.
    ASSIGN ('MS_DATA') TO <fs_data>.
    es_data = <fs_data>.
ENDMETHOD.                    "get_data
METHOD set_data.
    FIELD-SYMBOLS:
      <fs_data> TYPE ANY.
    ASSIGN ('MS_DATA') TO <fs_data>.
    <fs_data> = is_data.
ENDMETHOD.                    "set_data
ENDCLASS.                    "lcl_mother IMPLEMENTATION
*       CLASS lcl_child1 IMPLEMENTATION
CLASS lcl_child1 IMPLEMENTATION.
METHOD constructor.
    super->constructor( ).
    SELECT SINGLE * FROM but000 INTO ms_data.
ENDMETHOD.                    "constructor
ENDCLASS.                    "lcl_child1 IMPLEMENTATION
*       CLASS lcl_child2 IMPLEMENTATION
CLASS lcl_child2 IMPLEMENTATION.
METHOD constructor.
    super->constructor( ).
    SELECT SINGLE * FROM t000 INTO ms_data.
ENDMETHOD.                    "constructor
ENDCLASS.                    "lcl_child2 IMPLEMENTATION
I hope this helps!
Regards,
Thorsten

Error accessing constnt public attribute of a class in an overwrite method.

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The constant which is declared as public in the attribute section of the class is not available in the overwrite-exit of the method.
Please suggest me how to access the public attributes in the overwtire exits of the methods.
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Hi Ramneek,
Let me explain you the entire scenario:
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Jdev - 11.1.1.5

>
While inserting a new record in DB , i want to set few entity properties values .
>
you can user CreateWithparams
http://www.oracle.com/technetwork/developer-tools/adf/learnmore/13-create-with-params-169140.pdf
http://andrejusb.blogspot.com/2011/02/createwithparams-operation-for-oracle.html

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Hi,
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catch cx_root.
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you can avoid this step as this is not needed in case of view isntance
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Hi,
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Narin

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Accessing impl class attribute

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