Accessing private attribute of a class from its Friend Class

Hi Experts ,
Please help me to understand how can i access private attribute of one class from its friend class.
I am coding in Method (DO_SAVE) of class /BOBF/CL_TRA_TRANSACTION_MGR.
I need to access private variable ( MO_BOPF) of class /BOBF/CL_TRA_SERVICE_MGR ( Friend of /BOBF/CL_TRA_TRANSACTION_MGR ).
Regards,
Reny Richard

Hi Reny,
You should be able to access by creating object of friend class.
Sample:
data lo_frnd     TYPE REF TO /BOBF/CL_TRA_SERVICE_MGR.
data lo_compl type REF TO /BOBF/IF_TRA_TRANS_MGR_COMPL.
   create OBJECT lo_frnd
     exporting
               iv_bo_key = '111'
               IO_COMPL_TRANSACTION_MANAGER = lo_compl.
"access the private object of friend class
   clear lo_frnd->MO_BOPF.
Note: need to provide iv_bo_key & IO_COMPL_TRANSACTION_MANAGER while creating object.
Hope this helps you.
Regards,
Rama

Similar Messages

How to access private attribute of a class from its Friend Class

Hi Experts ,
I am coding in Method (DO_SAVE) of class /BOBF/CL_TRA_TRANSACTION_MGR.
I need to access private variable ( MO_BOPF) of class /BOBF/CL_TRA_SERVICE_MGR ( Friend of /BOBF/CL_TRA_TRANSACTION_MGR ).
Please help me to understand how can i access private attribute of one class from its friend class.
Regards- Abhishek

Hi Reny,
You should be able to access by creating object of friend class.
Sample:
data lo_frnd     TYPE REF TO /BOBF/CL_TRA_SERVICE_MGR.
data lo_compl type REF TO /BOBF/IF_TRA_TRANS_MGR_COMPL.
   create OBJECT lo_frnd
     exporting
               iv_bo_key = '111'
               IO_COMPL_TRANSACTION_MANAGER = lo_compl.
"access the private object of friend class
   clear lo_frnd->MO_BOPF.
Note: need to provide iv_bo_key & IO_COMPL_TRANSACTION_MANAGER while creating object.
Hope this helps you.
Regards,
Rama

Accessing private method of a class from report

Hello All,
I would have to access a private method of a class from a report.
Is it possible to access private mehod otherthan from its own class and friend classes.
Please guide on this. If is possible, to access please give some sample code.
Thanks & Regards,
Vishnu Priya

Hi,
By using the friend concept you can access private attribute or method in outside class.
Try the following code,
CLASS C1 DEFINITION DEFERRED.
CLASS C2 DEFINITION CREATE PRIVATE FRIENDS C1 .
PRIVATE SECTION.
DATA : NUM TYPE I VALUE 5.
METHODS : M2.
ENDCLASS.
CLASS C2 IMPLEMENTATION.
METHOD M2.
WRITE:/5 'I am method m2 in C2'.
ENDMETHOD.
ENDCLASS .
class c1 definition.
public section .
methods : m1.
endclass.
class c1 implementation.
method m1.
DATA : OREF2 TYPE REF TO C2.
CREATE OBJECT OREF2.
WRITE:/5 OREF2->NUM.
CALL METHOD OREF2->M2.
ENDMETHOD.
endclass.
START-OF-SELECTION.
DATA : OREF1 TYPE REF TO C1.
CREATE OBJECT OREF1.
CALL METHOD OREF1->M1.
Regards,
Jeyakumar.A
Edited by: Jeyakumar Aasai on Apr 14, 2011 11:51 AM

Trying to access a private attribute of a class in the same package

Hi,
I have defined a private attribute in a class
class Sample {
     private String newString = "hello";
in another class I am trying to access newString attribute using reflection api. It is throwing hte following exception
java.lang.NoSuchFieldException: value
     at java.lang.Class.getDeclaredField(Unknown Source)
     at refletionpack.mainclass.main(mainclass.java:20)
any ideas how to do it exactly? Should stringclass.getDeclaredField("value")
have the field name(newString) as a parameter?
public class mainclass {
     static Class stringclass = Sample.class;
     static Field stringCharsField = null;
     public static void main(String args[]){
          try{
               stringCharsField = stringclass.getDeclaredField("value");
               stringCharsField.setAccessible(true);
               char[] stringChars = (char[])stringCharsField.get("newString");
               System.out.println(stringChars);
          }catch(NoSuchFieldException ex){
               ex.printStackTrace();
          }catch(IllegalAccessException ex){
               ex.printStackTrace();
}

Hi,
to obtain the value of your private attribute you have to change two lines of code. At first you have to tell your class and not the field that private attributes can be accessed by using stringClass.setAccessible(true);After that you have to specify the name of the attribute to obtain which is called newString in your class which results in
stringCharsField = stringClass.getDeclaredField("newString");For the invocation of the method get(Object) you need an object first that is an instance of the analyzed class by calling Object sample = stringClass.newInstance.
Then you can retrieve the actual data of the requested field by calling String string = (String) stringCharsField.get(sample);A simpler solution would be when you make your attribute newString static. Then you can omit the necessary object for the retrieval of the attribute data and the line would result in String string = (String) stringCharsField.get(null);.
For further issues considering reflection you should read the appropriate API.
Hope it helps.

How to get the alias name of an attribute of a VO from its column name?

How can I programmatically get the alias name of an attribute of a VO given its column name?
Often alias and column names are not same when the VO is created (and I don't require them to be the same)

Hello John.
I will be more precise. When the VO based on a table comes out from the wizard, it produces xml entries like the following one:
<ViewAttribute
Name="ColumnName"
AliasName="COLUMN_NAME"/>There the column of the table on the DB really is COLUMN_NAME. The wizard mangles that name producing ColumnName as Name property.
This is ok. I don't want to change this default behaviour.
What I need is to programmatically get the value of that attribute given its AliasName property value:
String f(ViewObject vo, String AliasName) {
return (String)vo.getCurrentRow().getAttributeFromAliasName(aliasName); // getAttributeFromAliasName does not exist
// instead of return (String)vo.getCurrentRow().getAttribute(Name);
That is, usually getAttribute expects what in the xml is the Name property. However, I want a sort of getAttribute() expecting the AliasName.
I hope it's clear.

Accessing the attributes of a class using field symbols?

An option to pulll a variable into a user exit that otherwise would be out of reach is detailed [here|https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/208811b0-00b2-2910-c5ac-dd2c7c50c8e8]
Can a similar approach involving field symbols or otherwise, be used to pull in the attributes of a class into the exit? For now, I'm trying to access the A_FRONTEND_INDEX attribute of the class CL_HRXSS_REM.
any ideas?
~Suresh

Hi,
Have you already tried (PROGRAM)(OBJECT)->A_FRONTEND_INDEX in your code? I prepared small testing scenario with two programs and it works.
REPORT zmv_test1.
FORM test.
FIELD-SYMBOLS: <fs> TYPE ANY.
ASSIGN '(ZMV_TEST2)zip->crc32_map' TO <fs>.
IF sy-subrc EQ 0.
<fs> = 'Test'.
ENDIF.
ENDFORM. "test
REPORT zmv_test2.
DATA: zip TYPE REF TO cl_abap_zip.
START-OF-SELECTION.
CREATE OBJECT zip.
PERFORM test IN PROGRAM zmv_test1.
Cheers,

How to access Instance Attribute in a Class Interface from FM ?

Hi Experts
I have the following function module code, that passes the syntax, however in the class interface ABC, I have an attribute IJK that is Instance Attribute (Public). When I modify the code like ABC->IJK but it does not like it, the error is :-
Field "ABC" is unknown. It is neither in one of the specified tables nor defined by a "DATA" statement. "DATA" statement.
Question : How do I declare the Class Interface ABC in my Function Module that will allow me to access the Instance Attribute ?
Thanks in advance.
FUNCTION XYZ.
if not ABC=>EFG is initial.
output = ABC=>EFG.
shift output left deleting LEADING space.
endif.
ENDFUNCTION.

Hello
You question only makes sense if
(1) the class / interface is part of the FM's interface (i.e. an IMPORTING - or perhaps CHANGING - parameter)
(2) the class / interface is defined as global variable in the TOP include of the function group
If either of these two options is applicable then the coding may look like this:
" (1) IMPORTING parameter: e.g. IO_INSTANCE TYPE REF TO class / interface name
IF ( io_instance IS BOUND ).
io_instance->abc = 'New value'.
ENDIF.
" (2) Global variable of function group, e.g. GO_INSTANCE TYPE REF TO class / interface name:
IF ( go_instance IS BOUND ).
go_instance->abc = 'New value'.
ENDIF.
Obviously, the public attribute ABC must be changeable (i.e. not READ-ONLY).
Regards
Uwe

How to call a private attribute from a funcion module?

Guys,
I am trying to call a private attribute but of course it does not recognize the attribute. I am not very familiar with ABAP Objects, so i need some help on this. What is the solution as i need to get values from the fields which are inside the private attribute of the class CL_HRPA_INFOTYPE_CONTAINER. The private attribute name is a_primary_record.
Any help will be appreciated.
Thanks
Nahman

Hi Sushanth,
We save the text not as fields in a ztable directly but as a text.Please check the format below since it is based on a working code....
first you need to create a text in s010 transaction...
there should be some key based on which you plan to save the text..imagine it is Purchase order then..PO+item numner is always unique.eg:0090010(900PO/item10).so in the code you can append these two and they will be unique..so you can always retrieve them,overwrite,save them anytime you need
**************data declarations
TYPES: BEGIN OF TY_EDITOR,
EDIT(254) TYPE C,
END OF TY_EDITOR.
data: int_line type table of tline with header line.
data: gw_thead like thead.
data: int_table type standard table of ty_editor.
****************fill header..from SO10 t-code..when you save you need the unique key..youfill it here and pass it in save_text function module
GW_THEAD-TDNAME = loc_nam. " unique key for the text -> our unique key to identify the text
GW_THEAD-TDID = 'ST'. " Text ID from SO10
GW_THEAD-TDSPRAS = SY-LANGU. "current language
GW_THEAD-TDOBJECT = 'ZXXX'. "name of the text object created in SO10
*To Read from Container and get data to int_table
CALL METHOD EDITOR ->GET_TEXT_AS_R3TABLE
IMPORTING
TABLE = int_table
EXCEPTIONS
ERROR_DP = 1
ERROR_CNTL_CALL_METHOD = 2
ERROR_DP_CREATE = 3
POTENTIAL_DATA_LOSS = 4
others = 5.
IF SY-SUBRC 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
loop data from int_table and save to int_line-tdline appending it.
*save the text
CALL FUNCTION 'SAVE_TEXT'
EXPORTING
HEADER = GW_THEAD
TABLES
LINES = InT_LINE
EXCEPTIONS
ID = 1
LANGUAGE = 2
NAME = 3
OBJECT = 4
OTHERS = 5.
IF SY-SUBRC 0.
ENDIF.
*To pass to Container
CALL METHOD EDITOR ->SET_TEXT
hope that the above sample with helps you solve the problem
Please check and revert,
Reward if helpful
Regards
Byju

How can I access the Attribute Values from the Search Region

Hi all,
I have a table which contains Company id, department id, and PositonId. For a particular Company and Department there may be multiple records.
I have to pupulate a table which contains the position and other details that comes under a particular Department and Position based on the selection in the Three comboBoxes.
Also I have to populate a select many Shuttle to add new postions and records under a particular Department.
I created a query panel *(Search Region)* for the serch and a table to display the data. That is working fine.
Now the issue is I am using a view criteria to populate the shuttle with two bind variables ie, DepartmentId and CompanyId.
If the serach will return a resuktant set in the table it will also pupulate the correct records, otherwise ie, if the if the serch result is empty the corresponding iterator and the attribute is setting as null.
SO I want to access the attribute values from the Search Region itsef to populate the shuttle.
I don't know how can I access the data from the Search Region.
Please Help.
Regards,
Ranjith

you could access the parameters entered in search region by the user as follows:
You can get handle to the value entered by the user using queryListener method in af:query.
You can intercept the values entered as described
public void onQueryList(QueryEvent queryEvent) {
// The generated QueryListener replaced by this method
//#{bindings.ImplicitViewCriteriaQuery.processQuery}
QueryDescriptor qdes = queryEvent.getDescriptor();
//get the name of the QueryCriteria
System.out.println("NAME "+qdes.getName());
List<Criterion> searchList = qdes.getConjunctionCriterion().getCriterionList();
for ( Criterion c : searchList) {
if (c instanceof AttributeCriterion ) {
AttributeCriterion a = (AttributeCriterion) c;
a.getValues();
for ( Object o : a.getValues()){
System.out.println(o.toString());
//call default Query Event
invokeQueryEventMethodExpression("#{bindings.ImplicitViewCriteriaQuery.processQuery}",queryEvent);
public void onQueryTable(QueryEvent queryEvent) {
// The generated QueryListener replaced by this method
//#{bindings.ImplicitViewCriteriaQuery.processQuery}
QueryDescriptor qdes = queryEvent.getDescriptor();
//get the name of the QueryCriteria
System.out.println("NAME "+qdes.getName());
invokeQueryEventMethodExpression("#{bindings.ImplicitViewCriteriaQuery.processQuery}",queryEvent);
private void invokeQueryEventMethodExpression(String expression, QueryEvent queryEvent){
FacesContext fctx = FacesContext.getCurrentInstance();
ELContext elctx = fctx.getELContext();
ExpressionFactory efactory = fctx.getApplication().getExpressionFactory();
MethodExpression me = efactory.createMethodExpression(elctx,expression, Object.class, new Class[]{QueryEvent.class});
me.invoke(elctx, new Object[]{queryEvent});
Thanks,
Navaneeth

Accessing protected and private data of a class

Hi friends,
I have writen a sample code in oops abap but iam facing some problem.
CLASS MAIN DEFINITION.
    public SECTION.
      DATA : VAR1(10) TYPE C VALUE 'NEW VALUE'.
      METHODS : PUBLIC.
ENDCLASS.
CLASS MAIN IMPLEMENTATION.
     METHOD : PUBLIC.
       WRITE : /5 VAR1.
          VAR1 = 'CHANGED'.
       WRITE : /5 VAR1.
     ENDMETHOD.
ENDCLASS.
START-OF-SELECTION.
    DATA :
           O_MAIN TYPE REF TO MAIN.
           CREATE OBJECT O_MAIN.
           CALL METHOD O_MAIN->PUBLIC.
now its working fine as public methods can be access by all the people where as protected methods can be access by class and subclass so i can inherit the properties of above class and access the protected data.
where as to access private data , private data can be access by class itself...
so now how do i access the private data within the class...ie : how do i get the above output when i use a private section instead of public..
            CLASS MAIN DEFINITION.
    private SECTION.
      DATA : VAR1(10) TYPE C VALUE 'NEW VALUE'.
      METHODS : Private.
ENDCLASS.
CLASS MAIN IMPLEMENTATION.
     METHOD : Private.
       WRITE : /5 VAR1.
          VAR1 = 'CHANGED'.
       WRITE : /5 VAR1.
     ENDMETHOD.
ENDCLASS.
START-OF-SELECTION.
    DATA :
           O_MAIN TYPE REF TO MAIN.
           CREATE OBJECT O_MAIN.
           CALL METHOD O_MAIN->Private.
iam getting a error saying you cannot access the private section...
now private section can be accessed within the class but nt by others...
to access the private section within the class how should i correct it...
Regards
kumar

HAI,
Private attributes or methods can be accessed directly by the Object but within the Scope of the Class, but not outside.
Look at this:
CLASS MAIN DEFINITION.
public SECTION.
METHODS : Public.
private SECTION.
DATA : VAR1(10) TYPE C VALUE 'NEW VALUE'.
METHODS : Private.
ENDCLASS. " END of CLASS DEFINITION
CLASS MAIN IMPLEMENTATION.
METHOD : Public.
CALL METHOD Private.
ENDMETHOD.
METHOD : Private.
WRITE : /5 VAR1.
VAR1 = 'CHANGED'.
WRITE : /5 VAR1.
ENDMETHOD.
ENDCLASS. " END of CLASS IMPLEMENTATION
START-OF-SELECTION.
DATA: O_MAIN TYPE REF TO MAIN.
CREATE OBJECT O_MAIN.
CALL METHOD O_MAIN->Public.
PS: If there is any better alternative solution please share it .
Best Regards,
rama

Accessing private field of Derived object in Base class

Hi,
I have this piece of code I wrote a while ago to test something. The issue is accessing a private field of Base class in Base but of a Derived object.
Here is the code:
class Base
     private int x;
     public int getX()
          return x;
     public int getX(Derived d)
          // return d.x;
          return ((Base) d).x;
}The commented code does not work but casting d to Base does.
Can someone please explain the reasoning for this.
Forgot to mention that the compilation error is that x has private access in Base.
Thank you.
Edited by: 953012 on Apr 1, 2013 8:42 AM

>
As I understand the explanation says that you can access any private member within the code of the class that encloses the private member. So in this case x is the private member and the line of code (return d.x) is in Base which encloses the private member. Does it have to do with the fact that the Derived class does not in fact inherit the private members of Base?
>
It has to do with the entire quote from the spec
>
A private class member or constructor is accessible only within the body of the top level class (§7.6) that encloses the declaration of the member or constructor. It is not inherited by subclasses
>
Your code is
public int getX(Derived d)
          // return d.x;
          return ((Base) d).x;
     }The 'Derived' class is NOT 'the top level class that encloses the declaration of the member'. It does NOT inherit 'x' which is a private member of 'Base'. As far as the 'Derived' class is concerned 'x' does not exist.
>
If outside Base code I have Derived d = new Derived() and I call d.getX() then isn't that like calling d.x in myX()?
>
How is that the same? 'Base' owns 'x' and can do whatever it wants with it. 'Derived' has no knowledge of 'x' and CAN NOT access it.

Get access to the attributes of my dynpro from an Internet Service

Hi,
I have generated a new dynpro with one "Select"-button and several other fields.
Is it possible to get access to all of the attributes of this dynpro from my Internet Service ITSGENMOBILE.
What I mean is, at my dynpro there is an Icon on my button which I can not see when I open the template which is generated with the ITSGENMOBILE service.
Now I want to customize the service so that the Icon is also at my generated template.
You can find the original code at the TA SE80. (sry but I can't paste the code, because I will get an error if try to post the message with this code)
Open the path:
" Internet Service -->Search for "ITSGENMOBILE" --> Thema 99 --> HTML-Templates --> Elements --> Button"
I know with the code fragment
'GEN_NAME'[GEN_LOOP_LINE].name'
I get the name of my button or with
'GEN_NAME'[GEN_LOOP_LINE].label'
I get the text of my button.
But how can I get the name of path of the used ICON?
I google for it but I cant find any doc.
Maybe someone can help me with the syntax.
Thx for your help
Regards
Phil

Thx for your reply,
I had the following problem:
If i have created a dynpro and generate a template with the ITSGENMOBILE Service. But at this point the informations of the used icons got lost. Now I have customized a copy of the class CL_ITS_GENERATE_MOBILE and copy of the ITSGENMOBILE Service.
Now I can poll the used icons from my dynpro and screen them as a button at my browser.

Private attributes & class property definition errors

I'm setting up functions in a document class file, then from there I am going to call that function from a movieclip in flash. For some reason, maybe I have things set up wrong, but it is throwing me errors such as below:
Line 37 1013: The private attribute may be used only on class property definitions.
What am I doing wrong here and is there something I am not understanding?
Here is my .as code.
modal.as >
package {
     import flash.display.*;
     import flash.events.Event;
     import flash.events.MouseEvent;
     import flash.display.*;
     import flash.events.*;
     import flash.net.URLRequest;
     public class modal extends MovieClip {
          public function modal() {
     private var currentlyShowing:MovieClip=null;
          public function showModalContent(clip:MovieClip):void {
               if (currentlyShowing!=null) {
                    removeChild(currentlyShowing);
               currentlyShowing=clip;
               addChild(currentlyShowing);
          public function removeModalContent():void {
               if (currentlyShowing!=null) {
                    removeChild(currentlyShowing);
                    currentlyShowing=null;
And here is my code that is on the timeline:
slideshowimages_mc.one_mc.addEventListener(MouseEvent.CLICK, oneClick);
function oneClick(event:MouseEvent):void {
     var bigimagebg_mc=new mc_bigimagebg ;
     showModalContent(bigimagebg_mc);
     bigimagebg_mc.x=200;
     bigimagebg_mc.y=170;

unnest all the named functions and that variable:
package {
    import flash.display.*;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.display.*;
    import flash.events.*;
    import flash.net.URLRequest;
    public class modal extends MovieClip {
        private var currentlyShowing:MovieClip=null;
        public function modal() {
        public function showModalContent(clip:MovieClip):void {
            if (currentlyShowing!=null) {
                removeChild(currentlyShowing);
            currentlyShowing=clip;
            addChild(currentlyShowing);
        public function removeModalContent():void {
            if (currentlyShowing!=null) {
                removeChild(currentlyShowing);
                currentlyShowing=null;

How to access an attribute(this is referencing to another class) in a class

Dear Gurus,
I have to read an attribute of a class and that attributes type another class.
I have intantiated the class and my question is how to read the attribute. I know I can not dirrectly read the attribute since this is another class. I think I have to first reference the attribute right? Please advise me.
My code looks like below:
data: lo_fpm                                 type ref to if_fpm.
data: lo_msg_mgr                        type ref to if_fpm_message_manager.
data: lo_component_manager    type ref to cl_fpm_component_manager.
lo_fpm = cl_fpm_factory=>get_instance( ).    " cl_fpm_factory is a class which has a static method get_instance
lo_msg_mgr = lo_fpm->mo_message_manager.
lo_component_manager = lo_fpm->mo_component_manager.
The above statement is giving syntax error. I do not know why.
The basic difference b/n the two methods is if_fpm~mo_message_manager    type ref to if_fpm_message_manager    and
mo_component_manager     type ref to cl_fpm_component_manager.
Any help would be appreciated.
Thanks,
GSM

Hello
I cannot test the following coding because I do not get the singleton instance yet it should work:
*& Report ZUS_SDN_CL_FPM_FACTORY
*& Thread: How to access an attribute(this is referencing to another class) in a class
*& <a class="jive_macro jive_macro_thread" href="" __jive_macro_name="thread" modifiedtitle="true" __default_attr="1398429"></a>
REPORT zus_sdn_cl_fpm_factory.
DATA: go_fpm TYPE REF TO cl_fpm. " class implements if_fpm.
DATA: go_msg_mgr TYPE REF TO if_fpm_message_manager.
DATA: go_component_manager TYPE REF TO cl_fpm_component_manager.
START-OF-SELECTION.
BREAK-POINT.
go_fpm ?= cl_fpm_factory=>get_instance( ). " cl_fpm_factory is a class which has a static method get_instance
CHECK ( go_fpm IS BOUND ).
go_msg_mgr           = go_fpm->mo_message_manager.
go_component_manager = go_fpm->mo_component_manager.
END-OF-SELECTION.
Regards
Uwe

How to access private method of an inner class using reflection.

Can somebody tell me that how can i access private method of an inner class using reflection.
There is a scenario like
class A
class B
private fun() {
now i want to use method fun() of an inner class inside third class i.e "class c".
Can i use reflection in someway to access this private method fun() in class c.

I suppose for unit tests, there could be cases when you need to access private methods that you don't want your real code to access.
Reflection with inner classes can be tricky. I tried getting the constructor, but it kept failing until I saw that even though the default constructor is a no-arg, for inner classes that aren't static, apparently the constructor for the inner class itself takes an instance of the outer class as a param.
So here's what it looks like:
        //list of inner classes, if any
        Class[] classlist = A.class.getDeclaredClasses();
        A outer = new A();
        try {
            for (int i =0; i < classlist.length; i++){
                if (! classlist.getSimpleName().equals("B")){
//skip other classes
continue;
//this is what I mention above.
Constructor constr = classlist[i].getDeclaredConstructor(A.class);
constr.setAccessible(true);
Object inner = constr.newInstance(outer);
Method meth = classlist[i].getDeclaredMethod("testMethod");
meth.setAccessible(true);
//the actual method call
meth.invoke(inner);
} catch (Exception e) {
throw new RuntimeException(e);
Good luck, and if you find yourself relying on this too much, it might mean a code redesign.

Accessing private attribute of a class from its Friend Class

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