How to Access Protected Method of a Class

Hi,
I need to access a Protected method (ADOPT_LAYOUT) of class CL_REIS_VIEW_DEFAULT.
If i try to call that method by using class Instance it is giving error as no access to protected class. Is there any other way to access it..

Hi,
You can create a sub-class of this class CL_REIS_VIEW_DEFAULT, add a new method which is in public section and call the method ADOPT_LAYOUT of the super-class in the new method. Now you can create an instance of the sub-class and call the new sub-class method.
REPORT ZCD_TEST.
class sub_class definition inheriting from CL_REIS_VIEW_DEFAULT.
public section.
methods: meth1 changing cs_layout type LVC_S_LAYO.
endclass.
class sub_class implementation.
method meth1.
call method ADOPT_LAYOUT changing CS_LAYOUT = cs_layout.
endmethod.
endclass.
data: cref type ref to sub_class.
data: v_layout type LVC_S_LAYO.
start-of-selection.
create object cref.
call method cref->meth1 changing cs_layout = v_layout.

Similar Messages

How to access a method of a class which just known class name as String

Hi,
Now I have several class and I want to access the method of these class. But what I have is a String which contain the complete name of the class.
For example, I have two class name class1and class2, there are method getValue in each class. Now I have a String containing one class name of these two class. I want to access the method and get the return value.
How could I do?
With Class.forName().newInstance I can get a Object. but it doesn't help to access and execute the method I want .
Could anybody help me?
Thanks

Or, if Class1 and Class2 have a common parent class or interface (and they should if you're handling them the same way in the same codepath)...Class c = Class.forName("ClassName");
Object o = c.newInstance(); // assumes there's a public no-arg constructor
ParentClassOrInterface pcoi = (ParentClassOrInterface)o;
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// or maybe
Class<C extends ParentClassOrInterface> c = Class.forName("ClassName");
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How to use protected method of a class in application

Hi,
will u please tell me how to use protected method of class in application. (class:cl_gui_textcontrol, method:limit_text)
Thanks in advance,
Praba.

Hi Prabha,
You can set the maximum number of characters in a textedit control in the CREATE OBJECT statement itself.
Just see the first parameter in the method . I mean MAX_NUMBER_CHARS. Just set that value to the required number.
Eg:
data: edit type ref to CL_GUI_TEXTEDIT.
create object edit
exporting
    MAX_NUMBER_CHARS       = 10
   STYLE                  = 0
   WORDWRAP_MODE          = WORDWRAP_AT_WINDOWBORDER
   WORDWRAP_POSITION      = -1
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   NAME                   =
EXCEPTIONS
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    ERROR_CNTL_LINK        = 3
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    others                 = 6
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
           WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
In this case, the max: number of characters will be set to 10.
I hope your query is solved.
Regards,
SP.

Protected methods in abstract classes

Hello All
I have some problem which I cannot find a workaround for.
I have three classes:
package my.one;
public abstract class First {
protected void do();
protected void now();
package my.one;
public class NotWantToHave extends First {
protected First obj;
public NotWantToHave(First O) { obj = O; }
public void do() { obj.do(); }
public void now() { obj.now(); }
package my.two;
public class Second extends my.one.First {
protected void do() { System.out.println("Second does"); }
protected void now() { System.out.println("Second does now"); }
package my.three;
public class Three extends my.one.First {
protected my.one.First obj;
public Three(my.one.First O) { obj = O; }
protected void do() { System.out.println("Doing"); }
protected void now() { obj.now(); } // Not possible, see later text
Problem is, as one can read in http://java.sun.com/docs/books/tutorial/java/javaOO/accesscontrol.html , it says that you cannot access protected members and methods from classes if they are in a different package. However, since my class Three should not concern about the method now() but should use from some other class that implements (i.e. class Second), the question I have is how to do?
One way would be to implement a class that simply make a forward call to any protected method in the same package the abstract class is in like in class NotWantToHave and pass it to the constructor of class Third while this class was created with an instance of class Second. However, such a call would look very clumsy (new my.three.Third(new my.one.NotWantToHave(new my.two.Second()));). Furthermore, everyone could create an instance of class NotWantToHave and can invoke the methods defined as protected in class First, so the access restriction would be quite useless.
Does anyone has a good idea how to do?

Hi
One way I found is to have a nested, protected static final class in my super-class First and provide a protected static final method that returns a class where all methods of the super-class are made public and thus accessible from sub-classes at will. The only requirement is that a sub-class must invoke this method to encapsulate other implementations of the super-class and never publish the wrapper class instance. This will look as follows:
package my.one;
public abstract class First {
protected final static class Wrap extends First { // extend First to make sure not to forget any abstract method
    protected First F;
    public void do() { F.do(); }
    public void now() { F.now(); }
    protected Wrap(First Obj) { F = Obj; }
} // end Wrap
protected final static First.Wrap wrap(First Obj) { return new First.Wrap(Obj); }
protected abstract void do();
protected abstract void now();
} // end First*******
package my.two;
public class Second extends my.one.First {
protected void do() { System.out.println("Second does"); }
protected void now() { System.out.println("Second does now"); }
} // end Second*******
package my.three;
public class Three extends my.one.First {
protected my.one.First.Wrap obj;
public Three(my.one.First O) { obj = my.one.First.wrap(O); }
protected void do() { System.out.println("Doing"); }
protected void now() { obj.now(); } // Not possible, see later text
} // end Third*******
In this way, I can access all methods in the abstract super class since the Wrap class makes them public while the methods are not accessible from outside the package to i.e. a GUI that uses the protocol.
However, it still looks clumsy and I would appreciate very much if someone knows a more clear solution.
And, please, do not tell me that I stand on my rope and wonder why I fall down. I hope I know what I am doing and of course, I know the specification (why else I should mention about the link to the specification and refer to it?). But I am quite sure that I am not the first person facing this problem and I hope someone out there could tell me about their solution.
My requirements are to access protected methods on sub-classes of a super-class that are not known yet (because they are developed in the far, far future ...) in other sub-classes of the same super-class without make those methods public to not inveigle their usage where they should not be used.
Thanks

How to use protected method of a particular class described in API

I read in some forum that for accessing protected method reflcetion should be used. If I'm not wrong then how can I use reflection to access such methods and if reflection isn't the only way then what is another alternative. Please help me...
regards,
Jay

I read in some forum that for accessing protected
method reflcetion should be used. If I'm not wrong
then how can I use reflection to access such methods
and if reflection isn't the only way then what is
another alternative. Please help me...Two ways:
- either extend that class
- or don't use it at all
If you use reflection, you're very likely to break something. And not only the design. Remember that the method is supposed to be inaccessible for outside classes.

How to use protected method in jsp code

Could anyone tell me how to use protected method in jsp code ...
I declare a Calendar class , and I want to use the isTimeSet method ,
But if I write the code as follows ..
========================================================
<%
Calendar create_date = Calendar.getInstance();
if (create_date.isTimeSet) System.out.println("true");
%>
============================================================
when I run this jsp , it appears the error wirtten "isTimeSet has protected access in java.util.Calendar"

The only way to access a protected variable is to subclass.
MyCalendar extends Calendar
but I doubt you need to do this. If you only want to tell if a Calendar object has a time associated with it, try using
cal.isSet( Calendar.HOUR );

How to get protected method ?

I thought i can get protected method of my class when calling a Class.getMethod(String, Class []) in another class which inside the same package. However, it seem that i can't do that because it throw me a NoSuchMethodException when the method was protected. I thought all classes in same package can access the protected methods or fields of each other ??? Why ?
So, how i'm able to get the protected method in runtime ? (Hopefully no need to do anything with the SecurityManager)

It is working
Pls try the following program ...
public class p1 {
public static void main(String as[]) {
p2 ps2 = new p2();
ps2.abc();
class p2 {
protected void abc() {
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regards,
namanc

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I did
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<%com.mycompany.Aclass a = new com.mycompany.Aclass (); %>
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Till this time, it is working. no errors. But when I do
a.
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Retrieve values from Java class to JSP
URGENT! How to call a java class from JSP.
Calling a java method from jsp file -
this thread is same as my issue
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PradeeP

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How to access a method in webservice catalogued component in BPM Process

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Can anyone explain me how to access a method in webservice catalogued component in BPM Process using an imported jsp in bpm process.
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Ashish

If Class B only has a reference to an Interface A, and that reference points to a concrete instance of Class A, then of course Class B can still call the method on Interface A. The method for concrete instance Class A is called behind the scenes.
That's how interfaces work. That's what they're good for.
Look at the code in the java.sql package for examples. Connection, Statement, ResultSet - all are interfaces. But behind the scenes you're using the concrete implementations provided by your JDBC driver. You don't know or care what those classes are or their package structure. All you do is make calls to the java.sql interface API, and it all works. - MOD

How to call a method of another class ?

Hello,
I�d like to know how to call a method of another class. I have to classes (class 1 and class 2), class 1 instantiates an object of class 2 and executes the rest of the method. Later, class 1 has to call a method of class 2, sending a message to do something in the object... Does anybody know how to do that ? Do I have to use interface ? Could you please help me ?
Thanks.
Bruno.

Hi Schiller,
The codes are the following:
COMECO
import javax.swing.UIManager;
import java.awt.*;
import java.net.*;
import java.io.*;
import java.awt.event.*;
import javax.swing.*;
//Main method
class comeco {
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
catch(Exception e) {
AGORA testeagora=new AGORA();
// Code for socket
int port;
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     catch (Exception e) {
     System.out.println("comeco ---> port = 1500 (default)");
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     System.out.println("comeco ---> Server waiting for client on port " +
               server_socket.getLocalPort());
     // server infinite loop
     while(true) {
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          try {
          while(true) {
               String message = input.readLine();
               if (message==null) break;
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          catch (IOException e) {
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AGORA
import javax.swing.UIManager;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import javax.swing.*;
import java.net.*;
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public AGORA() {
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frame.pack();
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frameSize.height = screenSize.height;
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frameSize.width = screenSize.width;
frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
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{ System.out.println("agora ---> " +e);
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try {
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MAIN
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;
import javax.swing.border.*;
import java.net.*;
import java.io.*;
public class Main extends JFrame {
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     BufferedReader input;
System.out.println("main ---> port = 1500 (default)");
     port = 1500;
     try {
     server_socket = new ServerSocket(port);
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               server_socket.getLocalPort());
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while(true) {
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          System.out.println("main ---> New connection accepted " +
                    socket.getInetAddress() +
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dlg.setLocation((frmSize.width - dlgSize.width) / 2 + loc.x, (frmSize.height - dlgSize.height) / 2 + loc.y);
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dlg.show();
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protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if(e.getID() == WindowEvent.WINDOW_CLOSING) {
fileExit_actionPerformed(null);
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Runnable setTextRun=new Runnable() {
public void run() {
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               System.out.println("main ---> Chamou o m�todo result para mudar a interface");
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catch(Exception x) {
x.printStackTrace();
System.out.println("main --> About to invokelater");
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System.out.println("main --> Back from invokelater");
[]�s.

Protected method in Final Class

Hi all
Can we have protected method in Final class ?
If so how is it possible ?
Vicky

Final classes cannot have subclasses and hence no need of protected methods.
No comments on possibility.
Check this link from SAP help to know more :
http://help.sap.com/saphelp_nw70/helpdata/en/dd/4049c40f4611d3b9380000e8353423/content.htm
Hope this helps you.
Edited by: Harsh Bhalla on Dec 19, 2009 3:35 PM

How to execute the method of a class loaded

Hi,
I have to execute the method of com.common.helper.EANCRatingHelper" + version
version may be 1,2, etc
if version = 1 the class is com.common.helper.EANCRatingHelper1;
Iam able to load the class using following code.But iam unable to execute the method of the above class
Can anybody help me how to execute the method of the class loaded.
Following is the code
String version = getHelperClassVersion(requestDate);
String helperClass = "com.redroller.common.carriers.eanc.helper.EANCRatingHelper" + version;
Class eancRatingHelper = Class.forName(helperClass);
eancRatingHelper.newInstance();
eancRatingHelper.saveRating(); This is not executing throwing an error no method.
Thanks

eancRatingHelper.newInstance();Ok, that creates an instance, but you just threw it away. You need to save the return of that.
Object helper = eancRatingHelper.newInstance();
eancRatingHelper.saveRating(); This is not executing throwing an error no method.Of course. eancRatingHelper is a Class object, not an instance of your EANCRatingHelper object. The "helper" object I created above is (though it is only of type "Object" right now) -- you have to cast it to the desired class, and then call the method on that.
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ECATT: How to access a protected method of a class with eCATT?

Hi,
These is a class with a protected method. now i am willing to automate the scenario with eCATT. Since the method is Protected i am unable to use createobj and use callmethod. Could anyone suggest me a work around for this ?
Regards
Amit
Edited by: Amit Kumar on Jan 10, 2012 9:53 AM

Hello Anil,
You can write ABAP Code to do that inside eCATT Command.
ABAP.
ENDABAP.
Limitation of doing that is you can only use local variable inside ABAP.... ENDABAP. bracket.
Regards,
Bhavesh

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.

Not sure how to use protected method in arraylisy

Hi,
Im wondering how to use the removeRange method in java arraylist, its a protected method which returns void.
http://java.sun.com/j2se/1.3/docs/api/java/util/ArrayList.html#removeRange(int,%20int)
So if my class extends Arraylist i should be able to call the method but the compiler states that it still has protected access in arraylist. Does this mean im still overriding the method in arraylist ? A little explanation of whats happeneing would be appreciated as much as an answer
thanks

In this codefinal class myClass extends java.util.ArrayList {
    private ArrayList array = new ArrayList();
    public myClass(ArrayList ary){
        for(int i=0;i<7;i++) {
            array.add(ary.get(i));
        ary.removeRange(0,7)
}You are defining a class called myClass which extends ArrayList.
You have a member variable called array which is an ArrayList
You have a constructor which takes a parameter called ary which is an ArrayList
Since ary is an ArrayList, you cannot call it's removeRange() method unless myClass is in the java.util package. Do not put your class in the java.util package.
It seems like what you want to do is to move the items in one ArrayList to another ArrayList rather than copying them. I wrote a program to do this. Here it isimport java.util.*;
public class Test3 {
public static void main(String[] args) {
    MyClass myClass = new MyClass();
    for (int i=0; i<5; i++) myClass.add("Item-"+i);
    System.out.println("------ myClass loaded -------");
    for (int i=0; i<myClass.size(); i++) System.out.println(myClass.get(i));
    MyClass newClass = new MyClass(myClass);
    System.out.println("------ newClass created -------");
    for (int i=0; i<newClass.size(); i++) System.out.println(newClass.get(i));
    System.out.println("------ myClass now contains -------");
    for (int i=0; i<myClass.size(); i++) System.out.println(myClass.get(i));
class MyClass extends java.util.ArrayList {
    public MyClass() {}
    public MyClass(MyClass ary){
        for(int i=0;i<ary.size();i++) add(ary.get(i));
        ary.removeRange(0,ary.size());
}You should notice now that I don't create an ArrayList anywhere. Everything is a MyClass. By the way, class names are normally capitalized, variable names are not. Hence this line
MyClass myClass = new MyClass();
In the code above I create an empty MyClass and then populate it with 5 items and then print that list. Then I create a new MyClass using the constructor which takes a MyClass parameter. This copies the items from the parameter list into the newly created MyClass (which is an ArrayList) and then removes the items from the MyClass passed as a parameter. Back in the main() method, I then print the contents of the two MyClass objects.
One thing which may be a little confusing is this line.
for(int i=0;i<ary.size();i++) add(ary.get(i));
the add() call doesn't refer to anything. What it really refers to is the newly created MyClass object which this constructor is building. This newly created object is the 'this' object. So the line above could be rewritten as
for(int i=0;i<ary.size();i++) this.add(ary.get(i));
Hopefully this helps a little. The problems you seem to be having are associated with object oriented concepts. You might try reading this
http://sepwww.stanford.edu/sep/josman/oop/oop1.htm

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