Passing objects by reference

Hi,
I am trying to write a linked list data structure in Java.
But I have a problem with these lines.
ListElement startingElement;
String data[] = new String[10];
private void addData()
     ListElement currentElement = startingElement;
     int i=0;
     while(i < 10)
          if(currentElement == null)
               currentElement = new ListElement();
               currentElement.addData(data);
          else
               currentElement.addData(data[i]);
          currentElement = currentElement.nextElement();
          i++;
But the problem is that data do not get added to the main startingElement. So I can not traverse the LinkedList using startingElement.
I think currentElement only gets a copy of data in starting element and not a reference to startingElement(1st line of addData function).
Plz tell me how to get a reference to startingElement. Or is there some other problem in my coding.
Thanks a lot,
Chamal.

But the problem is that data do not get added to the
main startingElement. So I can not traverse the
LinkedList using startingElement. That's because you never assign anything to startingElement. What do you expect it to refer to?
I think currentElement only gets a copy of data in
starting element and not a reference to
startingElement(1st line of addData function).Nope. All object variables are references. "ListElement currentElement = startingElement" makes currentElement refer to the same object as startingElement. But like I said above, startingElement doesn't refer to anything. It probably contains the null reference.
Plz tell me how to get a reference to
startingElement. Or is there some other problem in my
coding."startingElement" contains a reference, just like all object variables. There seem to be many problems in your code. You never seem to assign a "next" element. For some mysterious reason you create an array of 10 strings, but never create strings for that array. Then you give each list element the array of 10 strings with no strings. The last line of your if block is duplicated in the else block, so it could be removed from both and moved below the if statement.

Similar Messages

Passing objects by reference in PL/SQL

Hi,
I have come across an unexpected problem using object types in PL/SQL that is causing me some grief. I'm from a Java background and am relatively new to Oracle Objects but what I'm trying to do is fairly trivial, I think. The code below illustrates the problem.
--- cut here ---
CREATE OR REPLACE TYPE test_obj_t AS OBJECT
num INTEGER,
CONSTRUCTOR FUNCTION test_obj_t RETURN SELF AS RESULT
CREATE OR REPLACE TYPE BODY test_obj_t IS
CONSTRUCTOR FUNCTION test_obj_t RETURN SELF AS RESULT IS
BEGIN
num := 0;
RETURN;
END;
END;
CREATE OR REPLACE PACKAGE test_obj_ref AS
PROCEDURE init(o IN test_obj_t);
PROCEDURE inc;
FUNCTION get_num RETURN INTEGER;
END;
CREATE OR REPLACE PACKAGE BODY test_obj_ref IS
obj test_obj_t;
PROCEDURE init(o IN test_obj_t) IS
BEGIN
obj := o;
END;
PROCEDURE inc IS
BEGIN
obj.num := obj.num + 1;
END;
FUNCTION get_num RETURN INTEGER IS
BEGIN
RETURN obj.num;
END;
END;
--- cut here ---
The object type test_obj_t holds a integer and the test_obj_ref package holds a 'reference' to an instance of the object.
To test the above code I run this PL/SQL block:
declare
obj test_obj_t;
begin
obj := test_obj_t;
test_obj_ref.init(obj);
dbms_output.put_line('obj.num='||obj.num);
dbms_output.put_line('test_obj_ref.get_num='||test_obj_ref.get_num);
test_obj_ref.inc;
dbms_output.put_line('obj.num='||obj.num);
dbms_output.put_line('test_obj_ref.get_num='||test_obj_ref.get_num);
test_obj_ref.inc;
dbms_output.put_line('obj.num='||obj.num);
dbms_output.put_line('test_obj_ref.get_num='||test_obj_ref.get_num);
end;
giving the output:
obj.num=0
test_obj_ref.get_num=0
obj.num=0
test_obj_ref.get_num=1
obj.num=0
test_obj_ref.get_num=2
It appears that the object held by the test_obj_ref package is being incremented as expected, but I would have expected the object declared in the PL/SQL block to be pointing to the same object and so should report the same incremented values.
I suspect that the object is copied in the call to test_obj_ref.init() so I end up with two object instances, one that is held by the test_obj_ref package and one in the anonymous block. Although, I thought that all IN parameters in PL/SQL are passed by reference and not copied!
Am I right?
Is passing objects by reference possible in PL/SQL, if so how?
I'm using Oracle 10.2.0.3.
Cheers,
Andy.

the object being passed to the test_obj_ref.init+ procedure is passed by reference; however, when you assign it to your package variable obj it is being copied to a new instance. you can pass object instances as parameters to procedures using the +IN OUT [NOCOPY]+ *calling mode, in which case modifications to the attributes of the passed object will be reflected in the calling scope's instance variable.
oracle's only other notion of an object reference is the +"REF <object-type>"+ datatype, which holds a reference to an object instance stored in an object table or constructed by an object view.
hope this helps...
gerard

Does Java pass objects by Reference

The following is my code:
public static boolean isValid(String tester, Integer intHours, Integer intMinutes)
          int dotPosition = tester.indexOf('.');
          String hours = tester.substring(0, dotPosition);
          String minutes = tester.substring(dotPosition +1, tester.length());
          try {
                    intHours = Integer.valueOf(hours);
                    intMinutes = Integer.valueOf(minutes);
     } catch (NumberFormatException nfe) {
     return false;
     return true;
What Iam trying to do is pass the Integer Objects by reference so that they retain their values outside of the scope of the function. My teacher told me that objects are passed by reference in Java but (even though the values are being changed within the function they are not retaining their values outside the scope of the function. Was my teacher wrong?

aden_jones wrote:
So to get behaviour similar to passing by reference I would need to create my own object and give it a method e.g. MyObject.changeValue(new_value) but I can't do that with Integer objects because I can't change their actual value I can only change the Integer Object that is being pointed at??You cannot achieve behavior that duplicates PBR with Java.
However, if by "similar to passing by reference" you mean that the method makes a change that the caller can see, then, yes, you need to pass a reference to a mutable object, and change that object's state inside the method.
void foo(Bar bar) {
bar.setBaz(123);
Bar bar = new Bar();
bar.setBaz(999);
foo(bar);
// after foo() completes, the caller now sees that the Bar object's internal state has changed
// from 999 to 123Note the difference between changing the value of a caller's variable (which can be done with PBR, and cannot be done in Java) and changing the state of the single object pointed to by both the caller's variable and the method's copy of that variable (which can be accomplished in Java, as it does not rely on PBR).

What is the use of passing object reference to itself ?

What is the use of passing object reference to itself ?
regards,
namanc

There is an use for returning an object reference from itself, for instance:
class C {
public:
     C append(C c) {
         // do something interesting here, and then:
         return this;
}You can "chain" calls, like this:
C c = new C();
C d = new C();
C e = new C();
c.append (d).append (e);Maybe the OP has "inverted" the common usage, or thought about a static method of a class C that requires a parameter of type C (effectively being a sort of "non-static method").
class C {
    static void doAnotherThing (C c) {
        c.doSomething(); //-- effectively C.doAnotherThing(c) is an "alternative syntax" for c.doSomething()

ExternalInterface: pass object reference across interface - how?

I want to invoke methods on specific Javascript or
ActionScript objects through calls across the ExternalInterface
barrier. I would like to be able to do this either AS -> JS or
JS -> AS.
So I would like to pass an object reference across the
interface. I'm not sure exactly what *is* getting passed (is it the
serialized value of the object?), but it doesn't seem to work as an
object reference.
Here's a notional code sample. I have two symmetric object
definitions, one in Javascript, one in ActionScript. During
initialization, one instance of each object will be created and
given a pointer to the other. Then they should each be able to
invoke a method on the other to "do stuff".
//----------[ code ]---------------------------------
//--- Javascript ---
class JSobj {
var _asObj;
JSobj.prototype.setASObj = function(obj) { _asObj = obj; }
JSobj.prototype.callASObj = function(foo) {
callASObjectMethod(_asObj, foo); } // does: _asObj.asMethod(foo);
JSobj.prototype.jsMethod = function(bar) { /* do stuff */ }
function callJSObjectMethod(obj, args) { obj.jsMethod(args);
//--- ActionScript ---
class ASobj {
var _jsObj;
public function set jsObj (obj:Object):void { _jsObj = obj;
public function callJSObj (foo:Number):void {
ExternalInterface.call("callJSObjectMethod", _jsObj, foo); } //
does: _jsObj.jsMethod(foo);
public function asMethod (bar:Number):void { /* do stuff */
function callASObjectMethod (obj:Object, args) {
obj.asMethod(args); }
ExternalInterface.addCallback("callASObjectMethod",
callASObjectMethod);
//----------[ /code ]---------------------------------
My workaround is to pass a uint as an opaque handle for the
object, then resolve it when it is passed back. I'd rather pass a
real reference if possible. Is there a way to pass object
references between JS and AS?
Thanks,
-e-

It's an object of a class that extends Object. I guess the answer is no then.
Thanks for your answer

Passing Objects to Stored Procedures in SQL Queries: UNREF(REF(o))

To me it seems that passing an object (type) to stored procedure in a SQL query is quite laborious. See:
I created the following simple type:
TYPE LAST AS OBJECT (
id NUMBER
defined a function:
FUNCTION "CHECKLAST" (l LAST)
RETURN NUMBER
AS LANGUAGE JAVA
NAME 'Checker.checkLast(Last) return int';
created a typed table:
CREATE TABLE lastTable OF Last;
inserted some objects:
INSERT INTO lastTable VALUES (1003);
NOW! If want to use the StoredFunction I have to use the following syntax:
SELECT checkLast(DEREF(REF(o)))
FROM lasttable o;
That's not very elegant.
I would expect the follwing to be working:
SELECT checkLast(o)
FROM lasttable o;
Did I do something wrong? Or did Oracle forget to implement the simple syntax?
Even worse, the DEREF(REF(o)) trick does not work for member functions...
Regards,
André

I did some experiments and can now (partly) answer my own question:
Indeed, it is possible to declare a function with a parameter passed as reference:
CREATE OR REPLACE TYPE Point AS OBJECT
ID INT,
MEMBER FUNCTION distance(q IN REF Point) RETURN NUMBER
Unfortunately, it is not possible to use the REF in PL/SQL directly:
CREATE OR REPLACE TYPE BODY Point is
MEMBER FUNCTION distance(q IN REF Point) RETURN NUMBER
AS
BEGIN
RETURN q.ID - SELF.ID; --Error(5,14): PLS-00536: No navigation through REF
END;
end;
So, for testing purposes I decided to implement a very simple PL/SQL member function:
CREATE OR REPLACE TYPE BODY Point is
MEMBER FUNCTION distance(q IN REF Point) RETURN NUMBER
AS
BEGIN
RETURN -1;
END;
end;
BUT: The SQL query without VALUE is still not possible. The query
SELECT *
FROM PointTable d, PointTable e
WHERE d.distance(e) > 0
renders ORA-00904: "E": invalid identifier
Somehow the 'e' seems to be misinterpreted completely.
Illogically, the following query works fine:
SELECT *
FROM PointTable d, PointTable e
WHERE d.distance(REF(e)) > 0
The illogical thing is that, now 'E' seems to refer to a VALUE and not to REF (because we can use the REF function), whereas in Gaverill's post 'O' seems to refer to a REF (because we can use the VALUE function).
My intent is to avoid both the VALUE(o) from Gaverill's example and the REF(e) from my example, because both is not intuitive for end users...
Maybe I have to define a VIEW holding the object values... But then the end user has to use it in the FROM part.
All in all, there seems to be no elegant solution for passing objects as parameters to functions...
Regards,
André

Yet Another "Passing Objects" Thread

Hi All,
Quick question about passing objects:
I have three classes - ClassA, ClassB and ClassC. Lets say I create an object of ClassA in ClassB. Also, I would like to send the ClassA object from ClassB to ClassC to update its data. My question is, can I set the ClassA object in ClassC and modify it through ClassB? Confusing? I'll try to create an example below.
ClassA:
public class ClassA {
       // data
} ClassB: creates and calls update methods for ClassA object
public class ClassB {
       ClassA object = new ClassA();
       // print object
       ClassC ClassCFacade = new ClassC();
       ClassCFacade.setClassAObject(object);
       ClassCFacade.updateClassAObject(object);
       // print object
}ClassC: updates object
public class ClassC {
      // set object
      public void setClassAObject(ClassA object) {
               // sets object
      // get object
      public ClassA getClassAObject() {
              // returns object
      // modify object
      public updateClassAObject() {
            ClassA o = getClassAObject()
            // modify o
            setClassAObject(o)
}So if objects are passed by reference, handle, or whatever you call it, essentially the above code should modify ClassA object created in ClassB, meaning the ClassA object should display it was modified after second print in ClassB. Although I've tried this implementation and the ClassA object is not modified after updateClassAObject method call from ClassB.
Any input would be appreciated.
Thanks,
Bob

OK. Here's snippets of actual code:
public class ClassA implements SessionBean, ClassARemoteBusiness {
    // ClassA Attributes
    Integer ID;
    String name;
    // SET METHODS
    public void setClassAID(Integer ID) {
        this.ID = ID;
    public void setClassAName(String name) {
        this.name = name;
    // GET METHODS
    public Integer getClassAID() {
        return ID;
    public String getCLassAName() {
        return name;
import classa.ClassA;
import classc.ClassC;
import javax.servlet.*;
import javax.servlet.http.*;
public class ClassB extends HttpServlet {
    private ClassA object;
    private ClassC ClassCFacade;
    private ClassCFacade = lookupClassCBean();
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
          HttpSession session = request.getSession();
          // display object values - displays default values
          out.println("ID: " +object.getClassAID());
          out.println("Name: " +object.getClassAName());
         // update object
         ClassCFacade.setClassAObject(object);
         ClassCFacade.updateClassAObjectID(someInteger);
         ClassCFacade.updateClassAObjectName(someName);
          // display object values - displays updated values
          out.println("ID: " +object.getClassAID());
          out.println("Name: " +object.getClassAName());
    // LOOKUP METHODS
    private web.ServiceLocator serviceLocator;
    private web.ServiceLocator getServiceLocator() {
        // service locator code
    private classc.ClassCRemote lookupClassCBean() {
        // lookup code
import classa.ClassA;
public class ClassC implements SessionBean, ClassCRemoteBusiness {
    private ClassA o;
    // SET METHODS
    public void setClassAObject(ClassA object) {
        o = object;
    // UPDATE
    public void updateClassAObjectID(Integer ID) {
        o.setClassAID(ID);
    public void updateClassAObjectName(String name) {
        o.setClassAName(name);
}

Passing an ActiveX reference from TestStand to Labview

How can I pass and ActiveX reference (for a dll) created and used in a TestStand sequence (under Locals) to a VI running within that sequence so that I can then call the same instance of the dll from Labview?
(I know this isn't the best approach to programming but I'm more interested in proving the point than anything else)
Cheers
Dan

Here's what I think you are tyring to do. Within your sequence, instantiate an object from an ActiveX DLL, storing a reference to it within a TS variable. Then, within a VI called by this sequence, call a method of the intantiated object.
To do this, when specifying your module on your LV step you must check the Sequence Context ActiveX Pointer check box. In the called VI you must have the a Sequence Context control on your front panel and have it wired to your connector pane along with a TestData cluster control and a LV Error Out cluster control.
Within the VI you use an invoke node to invoke the AsPropertyObject method on the SequenceContext (Make sure you use the ActiveX close function on this new reference when you are done with it.). Use another invoke node to call GetValInterface method on the sequence context property object reference (you could probably also use the GetValIDispatch method. See the help). For this invoke node you will want to use a lookupstring that reference the variable, relative to yo sequence context, in which you stored the refernce to the instantiated object in your sequence file. This will return a variant reference. You must convert this reference to a LV reference using the "To G Data" function in the ActiveX palette. The "To G Data" function requires a type input. You will need an ActiveX Automation Refnum control as the input to this (see ActiveX control palette). You will need to right click on this automation refnum control and browse the ActiveX automation server until you find the DLL ActiveX server from which you instantiated your object within your sequence. Once selected, also select the object that you instantiated. The "To G Data" function will then give you a reference to you object on which you can happily used in your desired manner. Make sure to close this reference with an ActiveX Automation close function when you are done with it.
I would definitely clean this up with a subVI to perhaps generalize the solution.

Passing object between dialogs. please help

I have a panel which displays student's info.
There is a button called "Create New Student"
When the button is clicked, a new Dialog will shows up, where users can enter basic info for new student.
My question is, after a user finish entering data for new student, a new Student Object will be created.
How do I pass this Student Object back to original frame?
The basic question would be how do I pass object from a Dialog to its' caller Panel.
Thanks

Put your Student object in global scope or in sucha
scope that both the dialog boxes can access it!
That is not a good idea. I think there is some misunderstanding here.
Putting Student object at global scope has nothing to
do with encapsulation. Furthermore, it is a
requirement! In OP's main panel he/she needs
reference to Student object. In Student
creation dialog, we need to create a new
Student. These two requirements necessitate the
accesibility of Student class.Yes, they both need to see the class. But it would be a bad idea to make the object that is in the main panel a global variable for the dialog to update.

Passing objects to running threads..

May anybody give me an idea on how to pass an object to an already running thread??
i only know how to pass an object to the thread's constructor.

I guess you are trying to assign a variable dynamically. What you can do is a keep a reference in your thread class (you may have probably done it because you have mentioned about passing an object to your threads constructor). Then give a public setter method to assign an object to that variable. Then you can change that even after you invoke start() of your Thread object.
example:
public class MyThread extends Thread{
private Object obj;
public void setObject(Object obj){
this.obj = obj;
public void run(){
//your code for the thread
Then from the class you invoke the thread you can do the following:
MyThread t = new MyThread();
t.start();
Object obj = "your object";
t.setObject(obj);
Note: However if your thread is not alive when you assign the object then there will be no use of the passed object to the code inside run() method

Will passing object as parameter increase memory usage?

Hi,
Will passing an object as a parameter increase the mmory usage? will it affect the performance of the application any means. Please share your view.
Regards,
A.

Ananth.durai wrote:
Hi ,
Just to precise my question, suppose i have an object called Student.I want to pass the Student Object to a method called addStudent().Now rather than passing Student Object, i am passing it's super class "Object". (i.e)
addStudent(Object object) instead of addStudent(Student student)will it make any difference in performance?Those are declarations, not method passing. You'd still be passing the same thing, if it's just a question about how you declare the method.
And it will make no difference in performance, except when you start getting bugs. You might start getting bugs because you declared the parameter with a more general type than is really necessary. If the method takes a Student, then declare it as taking a Student. Making it say it takes an Object will just make things worse.
But as per Cogniac,
when you pass a parameter or use an accessor function (get() function) or something of that sort, it's actually just passing a pointer that points to the memory location of the Object you want, not actually passing the Object itself to you, nor is it instantiating a new instance of the Object for your use.if i pass Object itself instead of Student,which memory address it will point out?That question makes no sense. You pass what you pass. If it's a Student object, then the reference the method gets will point to that object, regardless of whether the method knows that it's a Student or just an Object generally.

Passing object as parameter in JSF using h:commandLink tag

Hi ,
I have a scenario in which i need to pass objects from one jsp to another using h:commandLink. i read balusC article "Communication in JSF" and found a basic idea of achieving it. Thanks to BalusC for the wonderful article. But i am not fully clear on the concepts and the code is giving some error. The code i have is
My JSP:
This commandlink is inside a <h:column> tag of <h:dataTable>
<h:commandLink id="ol3"action="ManageAccount" actionListener="#{admincontroller.action}" >
               <f:param id="ag" name="account" value="#{admincontroller.account}" />
               <h:outputText id="ot3" value="Manage Account" rendered="#{adminbean.productList!=null}" />
               </h:commandLink>
Also a binding in h:dataTable tag with the binding="#{admincontroller.dataTable}"
                  My Backing Bean:
public class CompanyAdminController {
          private HtmlDataTable dataTable;
          private Account account=new Account();
public HtmlDataTable getDataTable() {
        return dataTable;
public Account getAccount() {
         return this.account;
public void setAccount(Account account) {
          this.account = account;
      public void action(){
            account= (Account)this.getDataTable().getRowData();
       } faces-config.xml
<navigation-rule>
    <from-view-id>/compadmin.jsp</from-view-id>
    <navigation-case>
      <from-outcome>ManageAccount</from-outcome>
      <to-view-id>/manageAccount.jsp</to-view-id>
    </navigation-case>
</navigation-rule>
<managed-bean>
          <managed-bean-name>admincontroller</managed-bean-name>
          <managed-bean-class>com.forrester.AdminController</managed-bean-class>
          <managed-bean-scope>request</managed-bean-scope>
          <managed-property>
               <property-name>account</property-name>
               <property-class>com.model.Account</property-class>
               <value>#{param.account}</value>
         </managed-property>
     </managed-bean>My account object:
public class Account {
string name;
public String getName()
    return this.name;
public void setName(String name)
       this.name=name;
}I need to display #{admincontroller.account.name} in my forwarded jsp. But I am not sure whether the code i wrote in commandlink is correct. I get an error if i use <f:setActionListener> . No tag "setPropertyActionListener" defined in tag library imported with prefix "f"
Please advise.
Edited by: twisai on Oct 18, 2009 11:46 AM
Edited by: twisai on Oct 18, 2009 11:47 AM
Edited by: twisai on Oct 18, 2009 11:48 AM

Yes.. iam removed the managedproperty from faces-config. But still i get the null pointer exception on main jsp itself and i am taken to second jsp manageaccount.jsp. Did you find anything wrong in my navigation case in the action method??
                                 public String loadAccount(){
           Account account = (Account)this.getDataTable().getRowData();
            return "ManageAcct";And also can you please answer this question i have
The AdminController is the backing bean of 1st JSP and manageAccontController is the backing bean of forwarded JSP .
Can i put this action method and dataTable binding in a 2nd manageAccontController backing bean instead of AdminController. But if i do that way dataList binding in h:dataTable tag will be in first JSP backing bean and dataTable binding to 2nd JSP. Not sure how to deal with this.
{

Memory leak problem while passing Object to stored procedure from C++ code

Hi,
I am facing memory leak problem while passing object to oracle stored procedure from C++ code.Here I am writing brief description of the code :
1) created objects in oracle with the help of "create or replace type as objects"
2) generated C++ classes corresponding to oracle objects with the help of OTT utility.
3) Instantiating classes in C++ code and assigning values.
4) calling oracle stored procedure and setting object in statement with the help of setObject function.
5) deleted objects.
this is all I am doing ,and getting memory leak , if you need the sample code then please write your e-mail id , so that I can attach files in reply.
TIA
Jagendra

just to correct my previous reply , adding delete statement
Hi,
I am using oracle 10.2.0.1 and compiling the code with Sun Studio 11, following is the brief dicription of my code :
1) create oracle object :
create or replace type TEST_OBJECT as object
( field1 number(10),
field2 number(10),
field3 number(10) )
2) create table :
create table TEST_TABLE (
f1 number(10),f2 number (10),f3 number (10))
3) create procedure :
CREATE OR REPLACE PROCEDURE testProc
data IN test_object)
IS
BEGIN
insert into TEST_TABLE( f1,f2,f3) values ( data.field1,data.field2,data.field3);
commit;
end;
4) generate C++ classes along with map file for database object TEST_OBJECT by using Oracle OTT Utility
5) C++ code :
// include OTT generate files here and other required header files
int main()
int x = 0;
int y = 0;
int z =0;
Environment *env = Environment::createEnvironment(Environment::DEFAULT);
Connection* const pConn =
env->createConnection"stmprf","stmprf","spwtrgt3nms");
const string sqlStmt("BEGIN testProc(:1) END;");
Statement * pStmt = pConn->createStatement(sqlStmt);
while(1)
TEST_OBJECT* pObj = new TEST_OBJECT();
pObj->field1 = x++;
pObj->field2 = y++;
pObj->field3 = z++;
pStmt->setObject(1,pObj);
pStmt->executeUpdate();
pConn->commit();
delete pObj;
}

Hoe to pass object as a parameter thru webSerive

I need to pass Object as a parameter to web service:
example:
public calss returnCodes{
int ret_code;
String ret_string;
public retrunCodes(int ret_code, String ret_string){
this.ret_code = ret_code;
this.ret_string = ret_string;
public int getret_code()
return this.ret_code;
public String getret_string {
return this,ret_string
and other repc holder class to hold returnCodes
public class retrunCodesHolder implents javax.xml.rpc.Holder
returnCode value;
pubic returnCodesHolder(){
public returnCodesHolder(returnCodes value) {
this.value = value;
In Webservice I use returnCodesHolder as parameter.
WebService getReturnCodesWs I have
returnCodes retCodes = new returnCodes(04,"Good return code)
returnCodesHolder retholder = new returnCodesHolder(retCodes)
return myString;
When I am calling above webService in servlet I have code:
org.test.mytest.returnCodesHolder retHolder = new org.test.mytest.returnCodesHolder();
String result = port.getReturnCodesWs(retHolder);
How to I access /get values of returnCodes class in my calling servlet?
I am using Tomcat v 6.0

I believe (although have never used, so if I'm wrong,
correct me please!) you can do it with implicit
dynamic cursors, such as:
For rec in 'select col1, col2 from table 1 '||lstr
loop
Not really:
michaels> declare
   lstr   varchar2 (30) := ' where empno = 7788';
begin
   for rec in 'select * from emp e ' || lstr
   loop
      null;
   end loop;
end;
Error at line 1
ORA-06550: line 5, column 4:
PLS-00103: Encountered the symbol "LOOP" when expecting one of the following:
   . ( * @ % & - + / at mod remainder rem .. <an exponent (**)>
   ||

Can we pass objects to pl/sql block

hi,
can we pass objects to pl/sql block.i think we can.how to pass it.help me in getting the examples of "passing objects to pl/sql block"

What exactly do you mean ? You can pass objects like any other parameters
into and out from procedures/functions:
SQL> create or replace procedure get_object(myobj in out nocopy my_obj)
2 is
3 begin
4   dbms_output.put_line('ID : ' || myobj.empno);
5   dbms_output.put_line('Salary : ' || myobj.sal);
6   dbms_output.put_line('Department : ' || myobj.deptno);
7   myobj.sal := myobj.sal*2;
8 end;
9 /
Procedure created.
SQL> declare
2   mo my_obj := my_obj(1,1000,10);
3 begin
4   get_object(mo);
5   dbms_output.put_line('New salary : ' || mo.sal);
6 end;
7 /
ID : 1
Salary : 1000
Department : 10
New salary : 2000
PL/SQL procedure successfully completed.Rgds.

Passing objects by reference

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