Calling a method of all subclasses.

I have a very complicated problem:
I need a series of classes that have almost everything in common. They differ only in two things: variable static String ID, which identifies this class, and a method modify() which is implemented by each class differently. Other than that, there are many other fields and methods that are needed for each class, but each class would handle these methods and fields equally.
So i declared an abstract class where I declared all thing subclasses have in common and each individual class is a subclass of this abstract class. The two thing mentioned before are declared as follows:
protected static String ID;
public abstract void modify();
Now I need three things:
1) I need a list of IDs of all subclasses for a combo box. So since ID is static and protected and set to value only in the subclass, it can be referenced. This is done by a static method getId(), also declared in the abstract class. Now I do not know whether this ID is thus shared by all subclasses or each class has this ID unique. I need the latter.
2) I need to fetch a class by its ID to instantiate it.
3) I need to declare that each subclass must have a one-parameter constructor with one int parameter, so when I get to instantiating by getContructor().newInstance(Object[]) , the params will be compatible every time a new instance occurs, whatever the ID.
I need this to ease my work. If I accomplish this, every time I would add a new subclass (which could be tens, maybe hundreds of them int the end) I need only to set ID and implement modify() and the new class would automatically register in the combobox and can be instatiated by its ID.
Thank you for your help.

Shagrat wrote:
1) I need a list of IDs of all subclasses for a combo box. So since ID is static and protected and set to value only in the subclass, it can be referenced. This is done by a static method getId(), also declared in the abstract class. Now I do not know whether this ID is thus shared by all subclasses or each class has this ID unique. I need the latter.You could perhaps try it? It will turn out it's the former. There is no way to programmatically produce a unique ID per class from a superclass.
2) I need to fetch a class by its ID to instantiate it.If you must, a Map of String (ID) vs Class<?> might be a starting point.
3) I need to declare that each subclass must have a one-parameter constructor with one int parameter, so when I get to instantiating by getContructor().newInstance(Object[]) , the params will be compatible every time a new instance occurs, whatever the ID. There is no way to enforce constructor signatures at compile time.

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Calling a method on all replicas of a bean in one shot

          Hi,
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          Regards,
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          You can try to think about the issue in another way.
          Hope this link can help you.
          http://www.weblogic.com/docs51/classdocs/API_jndi.html#exactlyOnce
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          "Sreeja" <[email protected]> wrote:
          >
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How can I call a method for all instances of a certain class?

Hi,
I have created a snake java applet, which you can play here [http://users.telenet.be/javagames/|http://users.telenet.be/javagames/].
But now I want to make this into a multi-player game (with two or more snakes etc..).
In my main class you can find methods like these:
snake.move();
snake.drawSnake();Now if I just alter my main class and make a second instance of the class snake and change my methods to this,
snake.move();
snake2.move();
snake.drawSnake();
snake2.drawSnake();my game almost works perfectly, I'll have to make some minor changes though.
But my question is, is there a better way of doing this. Instead of duplicating all the code, how can I make the methods immediately work for both snakes, instead of calling it twice?
All suggestions are welcome!
Thanks in advance.
Lennart

If there was something common to all snake instances then you could declare that variable static.
Note: I don't want to confuse you here. A static variable can have a value apart from any instances at all. Instances can view static variables but a static method or inner class, for example, cannot view instance variables.
More generally, I would think you would want to treat each snake as an automaton with its own behavior. There must be some class such as Game or Board or whatever that has, as suggested, either an array or collection of snakes. Iterate over each snake, ask it to perform some computation for the game and then draw itself.
- Saish

Calling a particular Method of all subclass from a super class

hi
I have a class 'A' which is a super class for 'B' ,'C' , 'D'
my main method is in the class Main and while on the run i am calling methods of B,C,D form this main class.
but as the first step of execution i need to call a init method which has been defined in all the sub-classes. and there can be any no of sub-classes and all will have the init method and i have to call the init method for all classes. is this possible to do that in runtime. ie i wil not be knowing the names of sub-classes.
thanks
zeta

Sorry if i had mislead you all.
I am not instantiating from my super class.
as mjparme i wanted one controller class to do the
init method calls
so i got it working from the link you gave.
URL url = Launcher.class.getResource(name);
File directory = new File(url.getFile());
This way i can get all the classes in that
in that package
and from reflection i can get whether it is
her it is a sub class of the particular super class
and i can call the init methods by making the init
methods static
thanks for the help
zetaThis is a rather fragile solution.
If the problem is one of knowing which subclasses exist, I would suggest specifying them explicitly via configuration (system property or properties file or whatever).
One thing that's not entirely clear to me: Is the init going to be called once for each subclass, or once for each instance of each subclass? It sounds to me like it's once per class, but I want to make sure.

[svn] 2622: TextBox and TextGraphic now call applyDisplayObjectProperties() at the end of their draw() method, like all other GraphicElements.

Revision: 2622
Author: [email protected]
Date: 2008-07-24 16:13:32 -0700 (Thu, 24 Jul 2008)
Log Message:
TextBox and TextGraphic now call applyDisplayObjectProperties() at the end of their draw() method, like all other GraphicElements. This method handles setting the visibiliy of the GraphicElement's DisplayObject, among other things.
Note: We should make it unnecessary for each GraphicElement subclass to have to call applyDisplayObjectProperties() at the end of draw(). The GraphicElement base class should ensure that this gets called at the appropriate time.
Group now calls draw() on graphic elements even if they are invisible, because otherwise applyDisplayObjectProperties() never gets called and the TextLines stay visible. Group was assuming that the only visible stuff in a GraphicElement is drawn with Graphics calls, which isn't the case.
This change is OK for now because every GraphicElement currently has its own DisplayObject, but it will need to be rethought when GraphicElements share DisplayObjects.
Reviewer: Chet
Bug: MXMLG-206 ("Setting visible property on TextGraphic does nothing")
QA: Peter, please add a Mustella test case for the 'visible property of TextBox and TextGraphic
Doc: No
Ticket Links:
http://bugs.adobe.com/jira/browse/MXMLG-206
Modified Paths:
flex/sdk/trunk/frameworks/projects/flex4/src/flex/core/Group.as
flex/sdk/trunk/frameworks/projects/flex4/src/flex/graphics/TextBox.as
flex/sdk/trunk/frameworks/projects/flex4/src/flex/graphics/TextGraphic.as

Changes for spine–aligned head:
public class StickManTool extends JPanel
    public StickManTool ()
        limbs [16] = new Limb (lankle, lfoot, 1);
        head = new Head2D (limbs[0]);
    protected void paintComponent (Graphics g)
        head.draw(graphics);
    private void updateLimbs (Point start, Point end)
        head.setPosition();
class Head2D extends Ellipse2D.Double
    public static double width = 30;   // width of head
    public static double height = 40; //height of head
    Point atlas;
    Point pelvis;
    private AffineTransform xform = new AffineTransform();
    public Head2D(Limb spine)
        super ();
        atlas = spine.movingJoint;
        pelvis = spine.fixedJoint;
        setPosition();
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        // Find angle of spine.
        double dy = atlas.y - pelvis.y;
        double dx = atlas.x - pelvis.x;
        double theta = Math.atan2(dy, dx);
        //System.out.printf("theta = %.1f%n", Math.toDegrees(theta));
        // Find center of head as extension along spine from atlas.
        double cx = atlas.x + (height/2)*Math.cos(theta);
        double cy = atlas.y + (height/2)*Math.sin(theta);
        // Move to origin of head.
        xform.setToTranslation(cx-width/2, cy-height/2);
        // Rotate head about its center.
        xform.rotate(theta+Math.PI/2, width/2, height/2);
    public void draw(Graphics2D g2)
        g2.draw(xform.createTransformedShape(this));
    public double getWidth () { return width; }
    public double getHeight () { return height; }
    public void setWidth (double widthIn) { width = widthIn; }
    public void setHeight (double heightIn) { height = heightIn; }
}

Hi all, BDC call transaction METHOD, trapping ERRORS

hi
i have developed BDC (recording via call transaction method) for VB01.
could u please tell me how to display records having errors after running recording or to give index of records having errors.
and is it possible to give transaction code for recording since my bdc is executable program.
plase answer both the questions.
thanx

Here is the flow that Raja is explaining to you.
DATA: v_index LIKE sy-tabix.
LOOP AT itab.
v_index = sy-tabix.
*-- prepare the BDC data
CALL TRANSACTION 'VB01' USING bdcdata
                           MODE 'N'
                          MESSAGES INTO bdcmsgcoll.
READ TABLE bdcmsgcoll WITH KEY msgtyp = 'E'.
IF sy-subrc = 0.
*-- Error occured for the record with index <b>v_index</b>
ELSE.
*-- unless there is a success message with this number,
*   it is not succesfull because 'No data for screen xxx'
*   will not show up as an error message type, but will be
* a success message type
    READ TABLE bdcmsgcoll WITH KEY msgnr = '312'.
    IF sy-subrc = 0.
*-- success
    ELSE.
*-- error with index <b>v_index</b>
    ENDIF.
ENDIF.
ENDLOOP.
As you can see, now you have the index of the record where the error occured. Now this will become complicated if you are combining several records into one transaction call. In that case you need to find how you can know all the records that you just accumulated.
As an example, let us say you have an internal table with external number, customer, material, quantity and at every new external number, you want to create a sales order. Until you get a new external number, you will not do the call transaction because until then it will be items of the same sales order. So in this case, after the call transaction, you will have get all the records that belong to making this sales order by using the external number and then prepare your messages.
I hope this is clear.
Srinivas
Message was edited by: Srinivas Adavi

Calling a method from a super class

Hello, I'm trying to write a program that will call a method from a super class. This program is the test program, so should i include extends in the class declaration? Also, what code is needed for the call? Just to make things clear the program includes three different types of object classes and one abstract superclass and the test program which is what im having problems with. I try to use the test program to calculate somthing for each of them using the abstract method in the superclass, but its overridden for each of the three object classes. Now to call this function what syntax should I include? the function returns a double. Thanks.

Well, this sort of depends on how the methods are overridden.
public class SuperFoo {
public void foo() {
     //do something;
public void bar(){
     //do something
public class SubFoo extends SuperFoo {
   public void foo() {
      //do something different that overrides foo()
   public void baz() {
      bar(); //calls superclass method
      foo(); //calls method in this (sub) class
      super.foo(); //calls method in superclass
}However, if you have a superclass with an abstract method, then all the subclasses implement that same method with a relevant implementation. Since the parent method is abstract, you can't make a call to it (it contains no implementation, right?).

Abstract classes and constructors - cannot call abs. methods in CONSTRUCTOR

Let me explain the scenario:
I'm building a program in which I need to read a file (among other things) and I intend to use object orientation to it's fullest in doing so. I thought of creating an abstract FILE class which has the commonalities, and two subclasses SERVER_FILE and PC_FILE, which implement the abstract method GET_CONTENTS in different ways (OPEN DATASET / GUI_UPLOAD), same for the CHOOSE method which allows to select the file from it's corresponding source.
Initially I've used an interface but since another tasks like setting the file path are common for both, switched to an ABSTRACT class.
Now, the problem is, from the main code I intend to use a FILE reference to handle either type of file. At the instantiation moment I'd like the path attribute to be set; if it was not set by parameter, i'd like to call the CHOOSE method which is abstract for the superclass. Since this is common for either subclass, I need a way to code it once in the superclass. But I get an error because the CHOOSE method is abstract.
This is the problem code (extracts):
*       CLASS lcl_file DEFINITION
CLASS lcl_file DEFINITION ABSTRACT.
PUBLIC SECTION.
    METHODS:
      constructor
        IMPORTING
          i_path TYPE string OPTIONAL
        EXCEPTIONS
          no_path_chosen,
      get_contents ABSTRACT
        RETURNING
          value(rt_contents) TYPE string_table
        EXCEPTIONS
          read_error.
PROTECTED SECTION.
    DATA:
      _v_path        TYPE string.
    METHODS:
      choose ABSTRACT
        EXCEPTIONS
          no_path_chosen,
      set_path
        IMPORTING
          i_path TYPE string.
ENDCLASS.                    "lcl_file DEFINITION
*       CLASS lcl_file IMPLEMENTATION
CLASS lcl_file IMPLEMENTATION.
METHOD constructor.
    IF i_path IS SUPPLIED.
      CALL METHOD set_path
        EXPORTING
          i_path = i_path.
    ELSE.
*---->>>> PROBLEM CALL - CAN'T BE DONE!!
      CALL METHOD choose
        EXCEPTIONS
          no_path_chosen = 1.
      IF sy-subrc = 1.
        RAISE no_path_chosen.
      ENDIF.
    ENDIF.
ENDMETHOD.                    "constructor
METHOD set_path.
    _v_path = i_path.
ENDMETHOD.                    "set_path
ENDCLASS.                    "lcl_file IMPLEMENTATION
*       CLASS lcl_server_file DEFINITION
CLASS lcl_server_file DEFINITION
                      INHERITING FROM lcl_file.
PUBLIC SECTION.
    METHODS:
      get_contents REDEFINITION.
PROTECTED SECTION.
    METHODS:
      choose       REDEFINITION.
ENDCLASS.                    "lcl_server_file DEFINITIO
*       CLASS lcl_server_file IMPLEMENTATION
CLASS lcl_server_file IMPLEMENTATION.
METHOD choose.
    DATA:
      l_i_path     TYPE dxfields-longpath,
      l_o_path     TYPE dxfields-longpath.
    CALL FUNCTION 'F4_DXFILENAME_TOPRECURSION'
      EXPORTING
        i_location_flag = 'A' " Application server
        i_path          = l_i_path
        fileoperation   = 'R' " Lectura
      IMPORTING
        o_path          = l_o_path
      EXCEPTIONS
        rfc_error       = 1
        OTHERS          = 2.
    IF sy-subrc = 0 AND l_o_path <> l_i_path.
      MOVE l_o_path TO _v_path.
    ELSE.
      RAISE no_path_chosen.
    ENDIF.
ENDMETHOD.                    "choose
METHOD get_contents.
    DATA: l_line   LIKE LINE OF rt_contents,
          l_osmsg TYPE string.
    CHECK NOT _v_path IS INITIAL.
    OPEN DATASET _v_path FOR INPUT
                             IN TEXT MODE
                             MESSAGE l_osmsg.
    IF sy-subrc <> 0.
      MESSAGE e000(oo) WITH l_osmsg
                       RAISING read_error.
    ELSE.
      DO.
        READ DATASET _v_path INTO l_line.
        IF sy-subrc = 0.
          APPEND l_line TO rt_contents.
        ELSE.
          EXIT.
        ENDIF.
      ENDDO.
      CLOSE DATASET _v_path.
    ENDIF.
ENDMETHOD.                    "get_contents
ENDCLASS.                    "lcl_server_file IMPLEMENTATION
*       CLASS lcl_pc_file DEFINITION
CLASS lcl_pc_file DEFINITION
                   INHERITING FROM lcl_file.
PUBLIC SECTION.
    METHODS:
      get_contents REDEFINITION.
PROTECTED SECTION.
    METHODS:
      choose       REDEFINITION.
ENDCLASS.                    "lcl_pc_file DEFINITIO
*       CLASS lcl_pc_file IMPLEMENTATION
CLASS lcl_pc_file IMPLEMENTATION.
METHOD choose.
    DATA:
      l_i_path     TYPE dxfields-longpath VALUE 'C:\',
      l_o_path     TYPE dxfields-longpath.
    CALL FUNCTION 'F4_DXFILENAME_TOPRECURSION'
      EXPORTING
        i_location_flag = 'P' " PC
        i_path          = l_i_path
        fileoperation   = 'R' " Lectura
      IMPORTING
        o_path          = l_o_path
      EXCEPTIONS
        rfc_error       = 1
        OTHERS          = 2.
    IF sy-subrc = 0 AND l_o_path <> l_i_path.
      MOVE l_o_path TO _v_path.
    ELSE.
      RAISE no_path_chosen.
    ENDIF.
ENDMETHOD.                    "choose
METHOD get_contents.
    CHECK NOT _v_path IS INITIAL.
    CALL METHOD cl_gui_frontend_services=>gui_upload
      EXPORTING
        filename                = _v_path
      CHANGING
        data_tab                = rt_contents
      EXCEPTIONS
        file_open_error         = 1
        file_read_error         = 2
        no_batch                = 3
        gui_refuse_filetransfer = 4
        invalid_type            = 5
        no_authority            = 6
        unknown_error           = 7
        bad_data_format         = 8
        header_not_allowed      = 9
        separator_not_allowed   = 10
        header_too_long         = 11
        unknown_dp_error        = 12
        access_denied           = 13
        dp_out_of_memory        = 14
        disk_full               = 15
        dp_timeout              = 16
        OTHERS                  = 17.
    IF sy-subrc <> 0.
      RAISE read_error.
    ENDIF.
ENDMETHOD.                    "get_contents
ENDCLASS.                    "lcl_pc_file IMPLEMENTATION
* Data
DATA: gr_file          TYPE REF TO lcl_file.
* Main Program
START-OF-SELECTION.
*   Get text lines from file
    IF p_srv = abap_true.
      CREATE OBJECT gr_file
        TYPE
          lcl_server_file
        EXCEPTIONS
          no_path_chosen = 1.
    ELSE.
      CREATE OBJECT gr_file
        TYPE
          lcl_pc_file
        EXCEPTIONS
          no_path_chosen = 1.
    ENDIF.
On a 4.6c system this code gave me a dump, while on my NW7.0 SP it doesn't even activate with the following error:
You cannot call abstract methods in the "CONSTRUCTOR" method.
- Following some suggestions from Java forums i've tried to define the constructor in the base class as PROTECTED or PRIVATE instead, then calling super->constructor from the subclasses, but I get this error in german:
Sichtbarkeit des Konstruktors darf nicht spezieller als die Sichtbarkeit der Instanzerzeugung (CREATE-Zuzatz) sein.
which Altavista translates like:
Visibility of the constructor may not be more special than the
visibility of the instance production (CREATE Zuzatz).
- I've also thought of defining the CHOOSE method as a class (not instance) one, then calling it before creating the file object which maybe solves the problem, but I see that approach more "procedural oriented" which i'm trying to avoid.
- Of course I could define a constructor for each subclass, but both would have exactly the same code.
I'm really lost on how should I code this. My main focus is on avoiding code dupplication.
I hope someone with more OO experience can see what I'm trying to do and sheds some light.
Many thanks for reading all this!

Dear Alejandro,
    When i saw your code, you are trying to access an astract method CHOOSE(which is actually implemented in sub class) from the constructor of the base class which is not possible. By this time, we don't know which sub class it is refering to, so it gives an error.   I see two solutions for this..
1. To define constructor in sub class and call the choose method from the consturctor of the sub class(which in this case is reputation of the same again for each sub class)
2. Remove the calling of choose method from the constructor of the main class and call it separately(after creating the object).   By now we know which sub class we are refering to.   I would have designed the program in the following way.
*       CLASS lcl_file DEFINITION
CLASS lcl_file DEFINITION ABSTRACT.
PUBLIC SECTION.
    METHODS:
      constructor
        IMPORTING
          i_path TYPE string OPTIONAL
        EXCEPTIONS
          no_path_chosen,
      get_contents ABSTRACT
        RETURNING
          value(rt_contents) TYPE string_table
        EXCEPTIONS
          read_errorm,
      set_path ABSTRACT
        EXCEPTIONS
          no_path_chosen.
PROTECTED SECTION.
    DATA:
      _v_path        TYPE string.
*    METHODS:
*      choose ABSTRACT
*        EXCEPTIONS
*          no_path_chosen,
*      set_path ABSTRACT
*        IMPORTING
*          i_path TYPE string.
ENDCLASS.                    "lcl_file DEFINITION
*       CLASS lcl_file IMPLEMENTATION
CLASS lcl_file IMPLEMENTATION.
METHOD constructor.
    IF i_path IS SUPPLIED.
      _v_path = i_path.
*      CALL METHOD set_path
*        EXPORTING
*          i_path = i_path.
*    ELSE.
**---->>>> PROBLEM CALL - CAN'T BE DONE!!
*      CALL METHOD choose
*        EXCEPTIONS
*          no_path_chosen = 1.
*      IF sy-subrc = 1.
*        RAISE no_path_chosen.
*      ENDIF.
    ENDIF.
ENDMETHOD.                    "constructor
* METHOD set_path.
*    _v_path = i_path.
* ENDMETHOD.                    "set_path
ENDCLASS.                    "lcl_file IMPLEMENTATION
*       CLASS lcl_server_file DEFINITION
CLASS lcl_server_file DEFINITION
                      INHERITING FROM lcl_file.
PUBLIC SECTION.
    METHODS:
      get_contents REDEFINITION,
      set_path     REDEFINITION.
* PROTECTED SECTION.
*    METHODS:
*      choose       REDEFINITION.
ENDCLASS.                    "lcl_server_file DEFINITIO
*       CLASS lcl_server_file IMPLEMENTATION
CLASS lcl_server_file IMPLEMENTATION.
METHOD set_path.
    DATA:
      l_i_path     TYPE dxfields-longpath,
      l_o_path     TYPE dxfields-longpath.
    CHECK _v_path IS INITIAL.
    CALL FUNCTION 'F4_DXFILENAME_TOPRECURSION'
      EXPORTING
        i_location_flag = 'A' " Application server
        i_path          = l_i_path
        fileoperation   = 'R' " Lectura
      IMPORTING
        o_path          = l_o_path
      EXCEPTIONS
        rfc_error       = 1
        OTHERS          = 2.
    IF sy-subrc = 0 AND l_o_path = l_i_path.
      MOVE l_o_path TO _v_path.
    ELSE.
      RAISE no_path_chosen.
    ENDIF.
ENDMETHOD.                    "set_path
METHOD get_contents.
    DATA: l_line   LIKE LINE OF rt_contents,
          l_osmsg TYPE string.
    CHECK NOT _v_path IS INITIAL.
*    OPEN DATASET _v_path FOR INPUT
*                             IN TEXT MODE
*                             MESSAGE l_osmsg.
    IF sy-subrc = 0.
*      MESSAGE e000(oo) WITH l_osmsg
*                       RAISING read_error.
    ELSE.
      DO.
        READ DATASET _v_path INTO l_line.
        IF sy-subrc = 0.
          APPEND l_line TO rt_contents.
        ELSE.
          EXIT.
        ENDIF.
      ENDDO.
      CLOSE DATASET _v_path.
    ENDIF.
ENDMETHOD.                    "get_contents
ENDCLASS.                    "lcl_server_file IMPLEMENTATION
*       CLASS lcl_pc_file DEFINITION
CLASS lcl_pc_file DEFINITION
                   INHERITING FROM lcl_file.
PUBLIC SECTION.
    METHODS:
      get_contents REDEFINITION,
      set_path     REDEFINITION.
* PROTECTED SECTION.
*    METHODS:
*      choose       REDEFINITION.
ENDCLASS.                    "lcl_pc_file DEFINITIO
*       CLASS lcl_pc_file IMPLEMENTATION
CLASS lcl_pc_file IMPLEMENTATION.
METHOD set_path.
    DATA:
      l_i_path     TYPE dxfields-longpath VALUE 'C:\',
      l_o_path     TYPE dxfields-longpath.
    CHECK _v_path IS INITIAL.
    CALL FUNCTION 'F4_DXFILENAME_TOPRECURSION'
      EXPORTING
        i_location_flag = 'P' " PC
        i_path          = l_i_path
        fileoperation   = 'R' " Lectura
      IMPORTING
        o_path          = l_o_path
      EXCEPTIONS
        rfc_error       = 1
        OTHERS          = 2.
    IF sy-subrc = 0 AND l_o_path = l_i_path.
      MOVE l_o_path TO _v_path.
    ELSE.
      RAISE no_path_chosen.
    ENDIF.
ENDMETHOD.                    "set_path
METHOD get_contents.
    CHECK NOT _v_path IS INITIAL.
    CALL METHOD cl_gui_frontend_services=>gui_upload
      EXPORTING
        filename                = _v_path
      CHANGING
        data_tab                = rt_contents
      EXCEPTIONS
        file_open_error         = 1
        file_read_error         = 2
        no_batch                = 3
        gui_refuse_filetransfer = 4
        invalid_type            = 5
        no_authority            = 6
        unknown_error           = 7
        bad_data_format         = 8
        header_not_allowed      = 9
        separator_not_allowed   = 10
        header_too_long         = 11
        unknown_dp_error        = 12
        access_denied           = 13
        dp_out_of_memory        = 14
        disk_full               = 15
        dp_timeout              = 16
        OTHERS                  = 17.
    IF sy-subrc = 0.
*      RAISE read_error.
    ENDIF.
ENDMETHOD.                    "get_contents
ENDCLASS.                    "lcl_pc_file IMPLEMENTATION
* Data
DATA: gr_file          TYPE REF TO lcl_file.
* Main Program
START-OF-SELECTION.
*   Get text lines from file
IF abap_true = abap_true.
    CREATE OBJECT gr_file
      TYPE
        lcl_server_file
      EXCEPTIONS
        no_path_chosen = 1.
ELSE.
    CREATE OBJECT gr_file
      TYPE
        lcl_pc_file
      EXCEPTIONS
        no_path_chosen = 1.
ENDIF.
gr_file->set_path( ).
Regards
Kesava
Edited by: Kesava Chandra Rao on Mar 19, 2008 11:44 AM

AutomationException while calling a method

Hi all,
I've got a problem accessing a COM/DCOM component in a Win2k box (Advanced Server)
with jcom. I configured the server and client described in the "JSP to COM" example.
The only difference: I don't want to access the excel sheet and I don't use a jsp
to execute.
I used the java2com.exe to create the proxies from my dll ScriptableUniversalTransAgt.dll.
But when I try to call a method on the dll via Java, I get the exception:
AutomationException: 0x80070005 - General access denied error in 'Invoke'
     at com.bea.jcom.Rpc.a(Rpc.java)
     at com.bea.jcom.be.a(be.java)
     at com.bea.jcom.StdObjRef.a(StdObjRef.java)
     at com.bea.jcom.Dispatch.vtblInvoke(Dispatch.java)
     at de.conet.galileo.suta.IScriptableUniversalTransAgentProxy.setHcmName(IScriptableUniversalTransAgentProxy.java:271)
     at de.conet.galileo.suta.ScriptableUniversalTransAgent.setHcmName(ScriptableUniversalTransAgent.java:336)
     at de.conet.galileo.SUTATest.start(SUTATest.java:33)
     at de.conet.galileo.SUTATest.main(SUTATest.java:27)
I checked everything on the server, the user has all rights he needs but it doesn't
work. In the eventlog of the server I can see that the login was successful.
The attachment contains some log files and my program with the dll.
Maybe someone can help me?
Thanks
Michael
[src.zip]

"Jeff Muller" <[email protected]> wrote in message
news:[email protected]...
Yeah, now I'm getting this error on code that worked two days ago.
javax.servlet.ServletException: Unable to initialize servlet:
AutomationExceptio
n: 0x80070005 - General access denied error, status: Getting instance, and
calli
ng initialize.
at com.teloquent.MyApp.MyServlet.initCOMObj(MyServlet.
java:308)
at com.teloquent.MyApp.MyServlet.init(MyServlet.java:8
1)
at
weblogic.servlet.internal.ServletStubImpl.createServlet(ServletStubIm
pl.java:700)
at
weblogic.servlet.internal.ServletStubImpl.createInstances(ServletStub
Impl.java:643)
at
weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubI
mpl.java:588)
at
weblogic.servlet.internal.ServletStubImpl.getServlet(ServletStubImpl.
java:368)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:242)
at
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
pl.java:200)
at
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppSe
rvletContext.java:2495)
at
weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestIm
pl.java:2204)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)
>
... but then again, I don't expect any response here.
"Michael" <[email protected]> wrote in message
news:[email protected]...
Hi all,
I've got a problem accessing a COM/DCOM component in a Win2k box
(Advanced
Server)
with jcom. I configured the server and client described in the "JSP toCOM" example.
The only difference: I don't want to access the excel sheet and I don'tuse a jsp
to execute.
I used the java2com.exe to create the proxies from my dllScriptableUniversalTransAgt.dll.
But when I try to call a method on the dll via Java, I get the
exception:
>>
AutomationException: 0x80070005 - General access denied error in'Invoke'
at com.bea.jcom.Rpc.a(Rpc.java)
at com.bea.jcom.be.a(be.java)
at com.bea.jcom.StdObjRef.a(StdObjRef.java)
at com.bea.jcom.Dispatch.vtblInvoke(Dispatch.java)
atde.conet.galileo.suta.IScriptableUniversalTransAgentProxy.setHcmName(IScript
ableUniversalTransAgentProxy.java:271)
at
de.conet.galileo.suta.ScriptableUniversalTransAgent.setHcmName(ScriptableUni
versalTransAgent.java:336)
at de.conet.galileo.SUTATest.start(SUTATest.java:33)
at de.conet.galileo.SUTATest.main(SUTATest.java:27)
I checked everything on the server, the user has all rights he needs butit doesn't
work. In the eventlog of the server I can see that the login wassuccessful.
The attachment contains some log files and my program with the dll.
Maybe someone can help me?
Thanks
Michael

Doubt in uploading using call transaction method

hi all
i am uploading f-29 in call transaction method .. i have a problem in currency field, the currency field is not picking up it shows a error that input field is longer than screen field .. i have declared currency field as type BSEG-WRBTR(same as screen field ...how to go about
thanks
lokesh

Hi,
When you use the database value directly in your BDC, you will have this issue. It is always advisable to use character fields when doing BDC. so change it to charecter field and try it..
Regards
Sudheer

How to call a method in one JSP from another JSP?

say that I have 2 JSPs.
JSP one has a button.
JSP two has some method that, say, find the square root of the number passed from JPS one.
How to - when click - the button on page one call the method on page two?
Please note that I can not use object binding, but I want passing the actual parameter and call the method on page two.
Please note that this is an update of a previous post on the same topic called "Object scope".
Thank you all very much.

No, i dont know how to call other than main methods from other classes
And one more doubt i have i.e. Like in C can we see the execution of the program like how the code is being compiled step by step and how the value of the variable changes from step to step like(Add Watch).........

Is it possible to call a method in a servlet from a java script ?

I need to do a dynamic html page . In the page i select some things and then these things must communicate whit a servlet because the servlet will do some DB querys and update the same webpage.
So is it possible to actually call a method of a servlet from a java script? i want to do something that looks like this page:
http://www.hebdo.net/v5/search/search.asp?rubno=4000&cregion=1011&sid=69DHOTQ30307151
So when u select something in the first list the secodn list automaticly updates.
thank you very much

You can
1. load all the options when loading the page and
set second selection options when user selected
the first; or
2. reload the page when user select first selection
by 'onChange' event; or
3. using iframe so you only need to reload part of
the page.

LVOOP "call parent method" doesn't work when used in sibling VI

It seems to me that the "call parent method" doesn't work properly according to the description given in the LabVIEW help.
I have two basic OOP functions I am doing examples for. I can get one to work easily and the other one is impossible.
Background
There are 3 basic situations in which you could use the "call parent method"
You are calling the parent VI (or method) of a child VI from within the child VI
You are calling the parent VI (or method) of a child VI from within a sibling VI
You are calling the parent VI (or method) of a child VI from a different class/object.
From the LabVIEW help system for "call parent method":
Calls the nearest ancestor implementation of a class method. You can use the Call Parent Method node only on the block diagram of a member VI that belongs to a class that inherits member VIs from an ancestor class. The child member VI must be a dynamic dispatching member VI and have the same name as the ancestor member VI
From my reading of that it means situation 3 is not supported but 1 & 2 should be.
Unfortunately only Situation 1 works in LabVIEW 2012.
Here is what I want
And this is what I actually get
What this means is that I can perform a classic "Extend Method" where a child VI will use the parent's implementation to augment it's functions BUT I cannot perform a "Revert Method" where I call the parent method's implementation rather than the one that belongs to the object.
If you want a picture
Any time I try and make operation2 the VI with the "call parent method" it shows up for about 1/2 sec and then turns into operation.
So there are only 3 possibilities I can see
Bug
Neither situation 2 or 3 are intended to work (see above) and the help is misleading
I just don't know what I am doing (and I am willing to accept this if someone can explain it to me)
The downside is that if situation 2 above doesn't work it does make the "call parent node" much less usefull AND it's usage/application just doesn't make sense. You cannot just drop the "call parent node" on a diagram, it only works if you have an existing VI and you perform a replace. If you can only perform situation 1 (see above) then you should just drop the "call parent node" and it picks up the correct VI as there is only 1 option. Basically if situation 2 is not intended to work then the way you apply "call parent method" doesn't make sense.
Attachements:
For the really keen I have included 2 zip files
One is the "Revert Method labVIEW project" which is of course not working properly because it wants to "call parent method" on operation not operation2
The other zip file is all pictures with a PIN for both "Revert Method" and "Extend Method" so you can see the subtle but important differences and pictrures of the relavant block diagrams including what NI suggested to me as the original fix for this problem but wasn't (they were suggesting I implement Extend Method).
If you are wondering where I got the names, concepts and PIN diagrams from see:
Elemental Design Patterns
By: Jason McColm Smith
Publisher: Addison-Wesley Professional
Pub. Date: March 28, 2012
Print ISBN-10: 0-321-71192-0
Print ISBN-13: 978-0-321-71192-2
Web ISBN-10: 0-321-71255-2
Web ISBN-13: 978-0-321-71255-4
All the best
David
Attachments:
Call parent node fault.zip ‏356 KB
Call parent node fault.zip ‏356 KB

Hi tst,
Thankyou for your reply. Can you have a look at my comments below on the points you make.
1) Have to disagree on that one. The help is unfortunately not clear. The part you quote in your reply only indicates that the VI you are applying "Call Parent Node" to must be dynamic dispatch. There is nowhere in the help it actually states that the call parent node applies to the VI of the block diagram it is placed into. Basically case 2 in my example fulfills all that the help file requires of it. The dynamic dispatch VI's operation are part of a class that inherits from a given ancestor. Operation 2 for Reverted behaviour is a child VI that is dynamic dispatch and has the same name as the ancestor VI (operation2). The help is missing one important piece of information and should be corrected.
2) True it does work this way. I was trying to build case 2 and had not yet built my ancestor DD for operation so the function dropped but wasn't associated with any VI. I was able to do this via a replace (obviously once the ancestor Vi was built) so this one is just bad operator
3) Keep in mind this is an example not my end goal. I have a child implementation because this is a case where I am trying to do a "reverse override" if you like.
3a) The point of the example is to override an objects method (operation2) with it's parent's method NOT it's own. The reason there is a child implementation with specific code is to prove that the parent method is called not the one that relates to the object (child's VI). If I start having to put case structures into the child VI I make the child VI have to determine which code to execute. The point of Revert method is to take this function out of the method that is doing the work. (Single Use Principal and encapsulation)
3b) The VI I am calling is a Dynamic Dispatch VI. That means if I drop the superclass's VI onto the child's block diagram it will become the child's implementation. Basically I can't use Dynamic Dispatch in this case at all. It would have to be static. That then means I have to put in additional logic unless there is some way to force a VI to use a particular version of a DD VI (which I can't seem to find).
Additional Background
One of the uses for "Revert Method" is in versioning.
I have a parent Version1 implementation of something and a child Version2. The child uses Version2 BUT if it fails the error trapping performs a call to Version1.
LabVIEW has the possibility of handling the scenario but only if both Case 1 and Case 2 work. It would actually be more useful if all 3 cases worked.
The advantage of the call parent method moving one up the tree means I don't have the track what my current object is and choose from a possible list, if, for example the hierarchy is maybe 5 levels deep. (so V4 calls V3 with a simple application of "call parent method" rather than doing additional plumbing with case structures that require care and feeding). Basically the sort of thing OOP is meant to help reduce. Anything that doesn't allow case 2 or 3 means you have to work around the limitation from a software design perspective.
If at the end of the day Case 2 and case 3 don't and won't ever work then the help file entry needs to be fixed.
All the best
David

How to call a method in backing bean on hitting 'Enter' key on a page.

Hi all,
I would be obliged if any one can provide me solution for the below given problem.
My requirement is to call a method in backing bean when i hit 'Enter' key on a JSP page.
I am trying this by using a script given below.
*function fnChangeFocus(){*
*if(window.event.keyCode==13){*
* document.getElementById("mainform:submitForm:commandbutton").focus();*
The JSP has the textbox as given below.
*<h:inputText id="inputtxtboxid" disabled="false" value="#{Bean.inputvalue}"*
onkeypress="fnChangeFocus()" size="24" />
Using this I could not acheive the required functionality. Please suggest some alternative.
Thanks,
Jagadeesh Pala

Only a form element supports the submit() function. Make sure that the getElementById returns the appropriate form. Or rather pass the element as the 'this' reference to the function and get the parent form from it.
After all this is just basic DHTML / Javascript+DOM knowledge and in fact this has nothing to do with JSF. For future basic DHTML / JS+DOM questions you may take a look at the appropriate forums, e.g. dhtmlcentral.com, dynamicdrive.com, etcetera.

Issue with calling a method activity before page render

Hi All,
I am using Jdeveloper 11.1.1.7.
I am trying to achieve the approach defined in "1.b. Calling a Method in Backing Bean:" elaborated in the blog - https://blogs.oracle.com/adf/entry/an_epic_question_how_to
As illustrated, I defined a default method activity (binding to a method in managed bean) and a view activity activity in a bounded task flow.
When I launch the application (running the view activity), following error is encountered -
oracle.adf.controller.metadata.ParsingException: ADFC-02020: Cannot find default activity 'check' in task flow definition '/WEB-INF/task-flow-definition.xml#task-flow-definition'.
    at oracle.adfinternal.controller.metadata.model.xml.XmlUtil.createAndLogParsingException(XmlUtil.java:474)
    at oracle.adfinternal.controller.metadata.model.xml.MetadataResourceXmlImpl.parseTaskFlowDefinition(MetadataResourceXmlImpl.java:507)
    at oracle.adfinternal.controller.metadata.model.xml.MetadataResourceXmlImpl.parse(MetadataResourceXmlImpl.java:361)
    at oracle.adfinternal.controller.metadata.provider.mds.MdsMetadataResourceProvider.parseResource(MdsMetadataResourceProvider.java:748)
    at oracle.adfinternal.controller.metadata.provider.mds.MdsMetadataResourceProvider.getMDSCachedResourceOrParse(MdsMetadataResourceProvider.java:732)
Please advise.
Best Regards,
Ankit Gupta

Hi Cvele, Timo,
Many thanks for the suggestions.
To avoid confusions, I have created a new application altogether. It seems that the method call is not being called when I run the page.
For your reference I have attached the task flow definition and method code below -
Task Flow Definition
<?xml version="1.0" encoding="windows-1252" ?>
<adfc-config xmlns="http://xmlns.oracle.com/adf/controller" version="1.2">
<task-flow-definition id="task-flow-definition">
    <default-activity id="__1">methodCall1</default-activity>
    <managed-bean id="__11">
      <managed-bean-name id="__13">TestBean</managed-bean-name>
      <managed-bean-class id="__10">TestBean</managed-bean-class>
      <managed-bean-scope id="__12">request</managed-bean-scope>
    </managed-bean>
    <view id="view1">
      <page>/view1.jspx</page>
    </view>
    <view id="exception">
      <page>/exception.jspx</page>
    </view>
    <method-call id="methodCall1">
      <method>#{requestScope.TestBean.checkURL}</method>
      <return-value id="__15">#{TestBean.checkURL}</return-value>
      <outcome id="__14">
        <to-string/>
      </outcome>
    </method-call>
    <control-flow-rule id="__2">
      <from-activity-id id="__3">methodCall1</from-activity-id>
      <control-flow-case id="__5">
        <from-outcome id="__6">go</from-outcome>
        <to-activity-id id="__4">view1</to-activity-id>
      </control-flow-case>
      <control-flow-case id="__8">
        <from-outcome id="__9">error</from-outcome>
        <to-activity-id id="__7">exception</to-activity-id>
      </control-flow-case>
    </control-flow-rule>
</task-flow-definition>
</adfc-config>
Method Code
public String checkURL() {
// Add event code here...
System.out.println("method activity called");
return "error";
Best Regards,
Ankit Gupta

Calling a method of all subclasses.

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