Create instance of class

Hi all,
I have problem with creating static fields in class. I have separate packages in my project and I need to have instances for all classes in this packages. I create instance of class using next code:
public class Digest
   private static Digest digest = null;
   protected Digest ()
public static Digest getInstance()
         if(digest == null)
          digest = new Digest();
        return digest;
public static void clearInstacePool()
         digest = null;
}But I have problem with deleting my packages and applet after I call Digest.getInstance(). I need to implement clearInstacePool() method to set reference of digest to null in unistall() method of my applet. Question is: how to create instance of class without implementing clearInstacePool()?

Question is: how to create instance of class without implementing clearInstacePool()?That question doesn't make sense,or at least it is ambiguous. 'Create instance' usually involves the 'new' operator, which has nothing to do with what methods are implemented. Do you mean how to code the class without implementing clearInstancePool()?

Similar Messages

Trying to access methods from a .class file by creating instance of class

Hey all,
I'm hoping you can help. I've been given a file "Input.class" with methods such as readInt(), readString(), etc. I have tried creating instances of this class to make use of it, but I receive the error "cannot find symbol : class Input".
If you could help at all, I would greatly appreciate it.
Here's my code. The first is the base program, the second is the driver.
import java.util.*;
public class CarObject
     private String makeType = "";
     private String modelType = "";
     private int yearOfRelease = 0;
     private double numOfMiles = 0.0;
     public void setFilmTitle(String make)
          makeType = make;
     public void setMediaType(String model)
          modelType = model;
     public void setYearOfRelease(int year)
          yearOfRelease = year;
     public void setNumOfMiles(double miles)
          numOfMiles = miles;
     public String getMakeType()
          return makeType;
     public String getModelType()
          return modelType;
     public int getYearOfRelease()
          return yearOfRelease;
     public double getNumOfMiles()
          return numOfMiles;
The program is used by a rental car company and the object takes on desired attributes.
import java.util.*;
public class TestCarObject
     static Scanner keyboard = new Scanner(System.in);
     public static void main(String[] args)
          System.out.println("Please answer the following questions regarding your rental car order.");
          Input carinput = new Input();
          String makeType = carinput.readString("Enter your desired make of car: ");
          String modelType = carinput.readString("Enter your desired model of car: ");
          int yearOfRelease = carinput.readInt("Enter the oldest acceptable year of release to rent: ");
          double numOfMiles = carinput.readDouble("Enter the highest acceptable number of miles: ");
          System.out.println("Make: " + makeType);
          System.out.println("Model: " + makeType);
          System.out.println("Year: " + makeType);
          System.out.println("Mileage: " + makeType);
}

No, I don't know the package name....Is there a way
to import the Input.class by itself without importing
the entire packge?
I tried extending the driver program too...It didn't
work either...
Message was edited by:
BoxMan56How do you know you have a class called Input.class ?
You got a jar file which contains it ? or just a simple .class file ?
You have to set the classpath in either case.
But for the former, you should also need to explicitly telling which package containing the class file you looking for (i.e. Input.class)
e.g. java.util.Vector which is a class called Vector inside java.util package.
You don't have to import the whole package, but you should tell which package this class belongs to.

Coldfusion create instance of class from data element when cosuming a webservice

I am calling the following wsdl via cfobject https://services-staging.labcorpsolutions.com/webservice/services/LabcorpOTS/wsdl/LabcorpO TS.wsdl
I am attempting to call the following method registerDonor(java.lang.String, java.lang.String, com.labcorp.ots.ws.data.CreateRegistrationRequest) which references the CreateRegistrationRequest data element.
I haven't been successful in creating an instance of the CreateRegistrationRequest class and setting values of its members, as well as the Phone class which is also a data element.
Any assistance would be greatly appreciated in creating instances of methods located in the targetNamespace="http://data.ws.ots.labcorp.com" of the wsdl.
Thanks

Thanks for the explanation and example. At first, I didn't understand what you were getting at, but after reading "Using Top-Level Containers" and "How to Use Root Panes" java tutorials it made much more sense. Unfortunately, the books I've read up to this point, did not cover those topics at all. The books simply stated that the first step in creating a Swing gui was to extend the JFrame, or JApplet, or etc.
Unfortunately, my original problem persists. I continue to get compile-time errors such as:
TestUserInterface.java:5: cannot find symbol
symbol: class UserInterface
location: class projects.web.TestUserInterface
                      UserInterface ui = new UserInterface(); Anyone know why?
Both the classes are in the same named packaged. Below is my code:
package projects.web;
import java.awt.*;
import javax.swing.*;
public class UserInterface extends JFrame{
     JPanel menuPanel = new JPanel();
     JPanel contentPanel = new JPanel();
     JPanel selectionPanel = new JPanel();
     JButton save = new JButton("Save");
     JButton addFiles = new JButton("Add");
     public UserInterface(){
     super("File Upload");
     setSize(500, 500);
     menuPanel.add(addFiles);
     selectionPanel.add(save);
     setLayout(new BorderLayout());
     add(menuPanel, BorderLayout.NORTH);
     add(contentPanel, BorderLayout.CENTER);
     add(selectionPanel, BorderLayout.SOUTH);
     } // end constructor
} // end UserInterface class
package projects.web;
public class TestUserInterface{
     public static void main(String[] args){
          UserInterface ui = new UserInterface();
} // end TestUserInterface class

Error creating instance of class from same package

When I try to create an instance of a class that is in the same package, my IDE indicates that the constructor can not be found. Can anyone tell me what is wrong? Thanks. Below are the codes for both classes:
package com.practice;
import java.applet.*;
import java.awt.*;
import javax.swing.*;
public class WebProject extends Applet{
     public void init(){
                // The following line is where the IDE indicates there is an error
          UserInterface gui = new UserInterface();
     } // end init()
     public void start(){
     } // end start()
     public void stop(){
     } // end stop()
     public void destroy(){
     } // end destory()
} // end class
package com.practice;
import java.applet.*;
import java.awt.*;
import javax.swing.*;
public class UserInterface extends Applet{
     JPanel menuPanel = new JPanel();
     JPanel contentPanel = new JPanel();
     JPanel savePanel = new JPanel();
     ImageIcon saveIcon = new ImageIcon("workspace/images/toolbarButtongraphics/general/Save24");
     JButton saveButton = new JButton("Save", saveIcon);
     public UserInterface(){
          savePanel.add(saveButton);
          setLayout(new BorderLayout());
          add(menuPanel, BorderLayout.NORTH);
          add(contentPanel, BorderLayout.CENTER);
          add(savePanel, BorderLayout.SOUTH);
} // end UserInterface class

Thanks for the explanation and example. At first, I didn't understand what you were getting at, but after reading "Using Top-Level Containers" and "How to Use Root Panes" java tutorials it made much more sense. Unfortunately, the books I've read up to this point, did not cover those topics at all. The books simply stated that the first step in creating a Swing gui was to extend the JFrame, or JApplet, or etc.
Unfortunately, my original problem persists. I continue to get compile-time errors such as:
TestUserInterface.java:5: cannot find symbol
symbol: class UserInterface
location: class projects.web.TestUserInterface
                      UserInterface ui = new UserInterface(); Anyone know why?
Both the classes are in the same named packaged. Below is my code:
package projects.web;
import java.awt.*;
import javax.swing.*;
public class UserInterface extends JFrame{
     JPanel menuPanel = new JPanel();
     JPanel contentPanel = new JPanel();
     JPanel selectionPanel = new JPanel();
     JButton save = new JButton("Save");
     JButton addFiles = new JButton("Add");
     public UserInterface(){
     super("File Upload");
     setSize(500, 500);
     menuPanel.add(addFiles);
     selectionPanel.add(save);
     setLayout(new BorderLayout());
     add(menuPanel, BorderLayout.NORTH);
     add(contentPanel, BorderLayout.CENTER);
     add(selectionPanel, BorderLayout.SOUTH);
     } // end constructor
} // end UserInterface class
package projects.web;
public class TestUserInterface{
     public static void main(String[] args){
          UserInterface ui = new UserInterface();
} // end TestUserInterface class

Creating Instances of class within its definition

Hi,
I am a newbie to Java and am doing a course on Java. In one my assignments it asks us to develop the following method for a Class called CraftStock:
"Define a new helper method void increaseStockCapacity() that creates a
new expanded array as follows. It should create a temporary instance of
CraftStock by using its single-argument constructor ? the value of the argument n is determined by the current size of the original craft stock array plus the
extraCapacity constant. All items in the original array must be copied from the
original array to the temporary instance of CraftStock. The array reference in the
original array instance of CraftStock must then be reassigned to the new
temporary array instance."
My question is - is this possible - can one create an instance of a class from within its definition? I can't find anyhting on this from the books.
Any help would be appreciated.
Thanks
Dev

Isn't there a caveat to all this?
If one creates an instance of a class within its own
definition, doesn't one face the potential danger of
attempting to access some part of the object which
has not yet been constructed?nope. why would it? we're creating a new instance of the class, from scratch. we're not accessing any part of the object, we're creating a new one. the fact that this is being done within the definition of the class is irrelevant. by the time anything comes to call on a static method of the class, the class is initialized already. remember, static methods don't have any dependency on a particular instance
sorry, that doesn't read very well, does it! what I mean is that the class itself is not the same thing as an instance of that class
Message was edited by:
georgemc

Using Class and Constructor to create instances on the fly

hi,
i want to be able to create instances of classes as specified by the user of my application. i hold the class names as String objects in a LinkedList, check to see if the named class exists and then try and create an instance of it as follows.
the problem im having is that the classes i want to create are held in a directory lower down the directory hierarchy than where the i called this code from.
ie. the classes are held in "eccs/model/behaviours" but the VM looks for them in the eccs directory.
i cannot move the desired classes to this folder for other reasons and if i try to give the Path name to Class.forName() it will not find them. instead i think it looks for a class called "eccs/model/behaviours/x" in the eccs dir and not navigate to the eccs/model/behaviours dir for the class x.
any ideas please? heres my code for ye to look at in case im not making any sense:)
//iterator is the Iterator of the LinkedList that holds all the names of the
//classes we want to create.
//while there is another element in the list.
while(iterator.hasNext())
//get the name of the class to create from the list.
String className = (String) iterator.next();
//check to see if the file exists.
if(!doesFileExist(className))
System.out.println("File cannot be found!");
//breake the loop and move onto the next element in the list.
continue;
//create an empty class.
Class dynamicClass = Class.forName(className);
//get the default constructor of the class.
Constructor constructor = dynamicClass.getConstructor(new Class[] {});
//create an instance of the desired class.
Behaviour beh = (Behaviour) constructor.newInstance(new Object[] {});
private boolean doesFileExist(String fileName)
//append .class to the file name.
fileName += ".class";
//get the file.
File file = new File(fileName);
//check if it exists.
if(file.exists())
return true;
else
return false;
}

ok ive changed it now to "eccs.model.behaviours" and it seems to work:) many thanks!!!
by the following you mean that instead of using the method "doesFileExist(fileName)" i just catch the exception and throw it to something like the System.out.println() ?
Why don't you simply try to call Class.forName() and catch the exception if it doesn't exist? Because as soon as you package up your class files in a jar file (which you should) your approach won't work at all.i dont think il be creating a JAR file as i want the user to be able to create his/her own classes and add them to the directory to be used in the application. is this the correct way to do this??
again many thanks for ye're help:)

Why cannot create instance to an abstract class?

Dear Developers....
abstract class can create be its own constructor but why they didn't create object

We cann't create an object for abstract class
because they have abstract methods which depends on
its subclass for its implementation. if it is
possible to create the object for abstract class
means then you can call a method which has no
implementation(abstract methods) which is a illegal
one thats what the ruleWhat about classes with no abstract members?
public abstract class A {}No danger of accessing anything illegal here.
The rule is far more simple. By declaring a class as abstract, the creator defines that no instances of this class may exist. Period. If you could create instances, the class wouldn't be abstract anymore, per definition. It's like asking why a green light doesn't shine red. If it would, it wouldn't be green anymore.

Creating instances using a string identifier

Is there a way to create an instance of a class given it's
class name as a string( for example). I know I could do it simply
by using conditional logic, but I'd like this to be extensible and
don't want to have to keep adding conditions as the system grows.
In other languages I've used, this is possible in many ways
and was wondering if there is a way to do this in AS 3.0
Thanks.

Thanks for the heads up Ed!
One way to be ableto get around your issue (not that this
exists in AS 3.0) is to be able to "register" a class so the
compiler/linker can link it into the swf and you get compile time
checking.
This is the way Delphi allows for this. The C# complier is
kind of in between in that you are still liable to get a runtime
error in the case that you creat an instance of a class using (say)
Activator.CreateInstance() which is the equivalent.
One way to get around this in AS 3.0 (I think) would be to
simply declare a variables of the types you intend to create
instances of dynamically. This should force the linker to link in
the class definition.
Of course in both C# and Delphi you can create instances of
classes unknown to you at complie time. From the looks of it, AS
3.0 can't do this.

No instances can be created from abstract classes

Dear SAPGurus,
I have developed a oData Service in my backend system & able to register the service in the gateway hub system. When i try to execute the metadata of the service from gateway system i am able to see the metadata with list of entity types availble in the data model.
But when i try to execute with entity set i am getting the following error.
"The class 'ZCL_ZGRC_DATA_MODEL_DPC' is abstract. No instances can be created from abstract classes."
Where my data model provider class name is 'ZCL_ZGRC_DATA_MODEL_DPC'
Kindly help me.
Thanks & Regards,
Rumeshbabu S

Hello Rumesh,
I do not think the error which u are getting is because of System Alias setting in SPRO.
Its something else which is really strange.
However the below is the setting to be maintained in GW SPRO system alias when u have a environment setup like u have now.
I mean the way u have created service and registered -
In ECC system u have created service using builder.
In GW system u have registered it and trying to access now via an RFC destination.
We have the same setup like u have now and we do not have any issues. We have also maintained the System Alias like i have shared in screen shot.
Check your System Alias config once in SPRO. But i dont think this is causing problem in your case. Still check once.
As per my understanding, from GW its trying to hit the DPC class and hence i feel system alias setting is correct in your case.
Problem is something else which is really strange.
Check error logs and see if it can. Share the error log please.
Regards,
Ashwin

Problem with creating my own class...

Hi all,
Purpose with this program:
I want to create my own class StringThing which take a string parameter and transform the content toUpperCase().
I have created a simple class StringThing which look like this:
class StringThing {
public String upperize (String u) {
u.toUpperCase();
return u;
}And my class where I use the StringThing looks like this:
import java.io.*;
class UseStringThing{
public static void main (String arg[]) throws Exception {
BufferedReader keyboard = new BufferedReader(
new InputStreamReader(System.in));
String s,p;
System.out.prinln("write a sentence!");
s=keyboard.readLine();
StringThing thing = new StringThing();
p=thing.upperize(s);
System.out.println(p);
}Am I not supposed to transform my string parameter in my class by using for instance toUpperCase()? Or is there some fundamental rule or piece of code which I forgot?
Thanks in advance,
/Beginner-T-who-ripps-his-hear-over-this-small-problem

Strings cannot be modified. What this line does:
u.toUpperCase();
is to create a new String object. toUpperCase() returns the newly created string and you are ignoring the returned value. What you want to do is:
return u.toUpperCase();
or
u = u.toUpperCase();

How to get instance of Class with its type parameters

Hi,
Have any of you folks been dealing with generics long enough to show me how this should be written? Or point me to the answer (I have searched as well as I could).
I boiled down my situation to the included sample code, which is long only because of the inserted comments. And while boiling I accidentally came across a surprise solution (a bug?), but would obviously prefer a smoother solution.
My Questions (referred to in the code comments):
#1. Is there a way to get my parameterized type (classarg) without resorting to using the bogus (proto) object?
#2. Can anyone understand why the "C" and "D" attempts are different? (All I did was use an intermediate variable????) Is this a bug?
Thanks so much for any input.
/Mel
class GenericWeird
   /* a generic class -- just an example */
   static class CompoundObject<T1,T2>
      CompoundObject(T1 primaryObject, T2 secondaryObject)
   /* another generic class -- its main point is that its constr requires its type class */
   static class TypedThing<ValueType>
      TypedThing(Class<ValueType> valuetypeclass)
   // here I just try to create a couple of TypedThings
   public static void main(String[] args)
      // take it for granted that I need to instantiate these two objects:
      TypedThing<String>                        stringTypedThing = null;
      TypedThing<CompoundObject<String,String>> stringstringTypedThing = null;
      // To instantiate stringTypedThing is easy...
      stringTypedThing = new TypedThing<String>(String.class);
      // ...but to instantiate stringstringTypedThing is more difficult to call the constructor
      Class<CompoundObject<String,String>> classarg = null;
      // classarg has got to be declared to this type
      //    otherwise there will rightfully be compiler error about the constructor call below
      // This method body illustrates my questions
      classarg = exploringHowToGetTheArg();
      // the constructor call
      stringstringTypedThing = new TypedThing<CompoundObject<String,String>>(classarg);
   } // end main method
   // try compiling this method with only one of A,B,C,D sections uncommented at a time
   private static Class<CompoundObject<String,String>> exploringHowToGetTheArg()
      Class<CompoundObject<String,String>> classarg = null;
      /* Exhibit A: */
////     classarg = CompoundObject.class;
         results in compiler error "incompatible types"
         found   : java.lang.Class<GenericWeird.CompoundObject>
         required: java.lang.Class<GenericWeird.CompoundObject<java.lang.String,java.lang.String>>
               classarg = CompoundObject.class;
                                        ^
         I understand this. But how to get the type information?
      /* It's obnoxious, but it looks like I will have to construct a temporary
          prototype instance of type
             CompoundObject<String,String>
          in order to get an instance of
             Class<CompoundObject<String,String>>
          (see my Question #1) */
      CompoundObject<String,String> proto = new CompoundObject<String,String>("foo", "fum");
      /* Exhibit B: */
////     classarg = proto.getClass();
         results in compiler error: "incompatible types"
         found   : java.lang.Class<capture of ? extends GenericWeird.CompoundObject>
         required: java.lang.Class<GenericWeird.CompoundObject<java.lang.String,java.lang.String>>
               classarg = proto.getClass();
                                        ^
      /* Exhibit C: */
////     classarg = proto.getClass().asSubclass(proto.getClass());
         results in compiler error: "incompatible types"
         found   : java.lang.Class<capture of ? extends capture of ? extends GenericWeird.CompoundObject>
         required: java.lang.Class<GenericWeird.CompoundObject<java.lang.String,java.lang.String>>
               classarg = proto.getClass().asSubclass(proto.getClass());
                                                     ^
      /* Exhibit D: (notice the similarity to C!): */
////     Class tmp1 = proto.getClass();
////     classarg = tmp1.asSubclass(tmp1);
      /* It compiles (see my Question #2) */
      return classarg;
   } // end method exploringHowToGetTheArg()
} // end class GenericWeird

Thanks so much, Bruce. (Oh my goodness, how would I have ever come up with that on my own?)
So in summary
This doesn't compile:
      classarg = (Class<CompoundObject<String,String>>)CompoundObject.class;but these do compile:
      classarg = (Class<CompoundObject<String,String>>)(Class)CompoundObject.class;or
      Class coclass = (Class)CompoundObject.class;
      classarg = (Class<CompoundObject<String,String>>)coclass;And this doesn't compile:
       classarg = proto.getClass().asSubclass(proto.getClass());but this does:
       Class tmp1 = proto.getClass();
       classarg = tmp1.asSubclass(tmp1);

Javax.servlet.ServletException: Cannot create bean of class

People,
HELP!! I am getting desperate!!!
I am a newbie when it comes to TOMCAT, but i have been using Blazix before.
My current system is using APACHE/TOMCAT on a Solaris machine and I keep hitting the same problem. I have gone through the archives but the only thing it states is to check the directory which i have done.
I keep getting:
Error 500
Internal Error
javax.servlet.ServletException: Cannot create bean of class MyClass
The code used to work on the Blazix server so i am assuming it is something to do with a config parameter somewhere - but i do not know where. I have checked the directory/package structure and they seem to work. It even serves it when they are html pages not jsp, but obviously wont use the bean. :(
I can post code if necessary.
Please help
Steve

The FormData.class file is in examples/WEB-INF/classes/ directory.
Is this wrong? then should it be in a package called examples.steve???
<TITLE> Poc </TITLE>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="Mozilla/4.61 [en] (WinNT; I) [Netscape]">
<META NAME="Author" CONTENT="Steve Brodie">
<META NAME="Proof of Concept order entry system" CONTENT="">
<META NAME="PROOF OF CONCEPT ORDER ENTRY SYSTEM " CONTENT="">
</HEAD>
<%@ page import="steve.FormData" %>
<jsp:useBean id="user" class="steve.FormData"/>
<jsp:setProperty name="user" property="*"/>
<FORM METHOD=POST ACTION="SaveDetails.jsp">
<CENTER>
<H1>
POC CNS demo <BR>
POC Order Entry System <BR></H1>
<H2><CENTER>PROOF OF CONCEPT ORDER ENTRY SYSTEM <BR>
in order to illustrate the use of an new product<BR></H1>
</CENTER>
<BODY>
Please enter the following details: <BR>
Second name <INPUT TYPE=TEXT NAME=secondName SIZE=20><BR>
First name <INPUT TYPE=TEXT NAME=firstName SIZE=20><BR>
Address <INPUT TYPE=TEXT NAME=address1 SIZE=20><BR>
Address <INPUT TYPE=TEXT NAME=address2 SIZE=20><BR>
Post Code <INPUT TYPE=TEXT NAME=postCode SIZE=10><BR>
Phone NO. <INPUT TYPE=TEXT NAME=phone SIZE=10><BR>
<BR>
Credit Card<INPUT TYPE=TEXT NAME=credit SIZE=15><BR>
<BR>
Quality of Service:
<SELECT TYPE=TEXT NAME="QoS">
<OPTION SELECTED TYPE=TEXT NAME=Gold>Gold <BR>
<OPTION TYPE=TEXT NAME=Silver>Silver <BR>
<OPTION TYPE=TEXT NAME=Bronze>Bronze <BR>
</SELECT>
<BR>
<BR>
<INPUT TYPE=RESET>
<P><INPUT TYPE=SUBMIT>
<BR>
<BR>
<IMG SRC=../images/Cisco.gif>
</FORM>
</BODY>
</HTML>
package steve;
* @author Steven Brodie
* @date
* @version 0.0
import java.io.*;
import java.lang.*;
import java.util.*;
public class FormData {
     String secondName = null;
     String firstName = null;
     String address1 = null;
     String address2 = null;
     String postCode = null;
     int credit = 0;
     int phone = 0;
     String qos = null;
     String file = "out";
     String filex = "xout";
     PrintWriter pout = null;
     PrintWriter xout = null;
     FormData() {
          try {
               pout = new PrintWriter(new BufferedWriter(new FileWriter(file + ".txt")));
               xout = new PrintWriter(new BufferedWriter(new FileWriter(filex + ".xml")));
          xout.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
          xout.println("<OrderEntry xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"");
          xout.println("xsi:noNamespaceSchemaLocation=\"http://machine2.com:8080/xml/xsd/OrderEntry.xsd\">");
          } catch (IOException ioe) {
               System.err.println("DataFileWriter error ioe on init");
               ioe.printStackTrace();
               System.exit(1);
public void setFirstName( String value ) {
firstName = value;
          System.out.println(firstName);
          pout.println(firstName);
          xout.println("<firstname value= \"" + firstName + "\"/>");
public void setSecondName( String value ) {
secondName = value;
          System.out.println(secondName);
          pout.println(secondName);
          xout.println("<secondname value= \"" + secondName + "\"/>");
public void setAddress1( String value ) {
address1 = value;
          System.out.println(address1);
     pout.println(address1);
          xout.println("<address1 value= \"" + address1 + "\"/>");
public void setAddress2( String value ) {
address2 = value;
          System.out.println(address2);
          pout.println(address2);
          xout.println("<address2 value= \"" + address2 + "\"/>");
public void setPostCode( String value ) {
postCode = value;
          System.out.println(postCode);
          pout.println(postCode);
          xout.println("<postCode value= \"" + postCode + "\"/>");
public void setCredit( int value ) {
credit = value;
          System.out.println(credit);
          pout.println(credit);
          xout.println("<creditCard value= \"" + credit + "\"/>");
     public void setPhone( int value) {
          phone = value;
          System.out.println("0" + phone);
          pout.println("0" + phone);
          xout.println("<phoneNo value= \"0" + phone + "\"/>");
public void setQoS( String value ) {
qos = value;
          System.out.println(qos);
          pout.println(qos);
          xout.println("<QoS value= \"" + qos + "\"/>");
          xout.println("</OrderEntry>");
          pout.flush();
          pout.close();
          xout.flush();
          xout.close();
public String getFirstName() {
          return firstName;
public String getSecondName() {
          return secondName;
public String getAddress1() {
          return address1;
public String getAddress2() {
          return address2;
public String getPostCode() {
          return postCode;
public int getCredit() {
          return credit;
     public int getPhone() {
          return phone;
     public String getQoS() {
          return qos;

Creating instances of Document subclass

I have two new classed, one extends Document (call it CustomDoc) and the other extends Folder (call it CustomFolder).
Is there any way to use the iFS webui to create these instead of the standard Document and Folder objects?

Do you want all iFS Files to be stored as an instance of Custom-Doc, or only certain kinds of file. In order to redirect a particular kind of file (identified by it's file extension) to a custom content type you can use the ClassSelectionParser.
See attached an example that maps BMP, JPG and TIF to the SimpleImage type.
<?xml version="1.0" standalone="yes"?>
<OBJECTLIST>
<PROPERTYBUNDLE>
<UPDATE RefType="valuedefault">ParserLookupByFileExtension</UPDATE>
<PROPERTIES>
<PROPERTY ACTION="add">
<NAME>tif</NAME>
<VALUE DataType="String">oracle.ifs.beans.parsers.ClassSelectionParser</VALUE>
</PROPERTY>
<PROPERTY ACTION="add">
<NAME>bmp</NAME>
<VALUE DataType="String">oracle.ifs.beans.parsers.ClassSelectionParser</VALUE>
</PROPERTY>
<PROPERTY ACTION="add">
<NAME>jpg</NAME>
<VALUE DataType="String">oracle.ifs.beans.parsers.ClassSelectionParser</VALUE>
</PROPERTY>
</PROPERTIES>
</PROPERTYBUNDLE>
<PROPERTYBUNDLE>
<UPDATE RefType="valuedefault">IFS.PARSER.ObjectTypeLookupByFileExtension</UPDATE>
<PROPERTIES>
<PROPERTY ACTION="add">
<NAME>tif</NAME>
<VALUE DataType="String">SimpleImage</VALUE>
</PROPERTY>
<PROPERTY ACTION="add">
<NAME>jpg</NAME>
<VALUE DataType="String">SimpleImage</VALUE>
</PROPERTY>
<PROPERTY ACTION="add">
<NAME>bmp</NAME>
<VALUE DataType="String">SimpleImage</VALUE>
</PROPERTY>
</PROPERTIES>
</PROPERTYBUNDLE>
</OBJECTLIST>
I do not know of any way to create instances of custom folders except via XML, or the API,
Here is an example of how to create an an instance of a custom folder using an XML file
<PressReleaseFolder>
<NAME>Oracle8i Press Release</NAME>
<FOLDERPATH>/PublishedPressReleases</FOLDERPATH>
<ACL reftype="name" classname="SystemAccessControlList">LockedContent</ACL>
</PressReleaseFolder>
null

Create a Exception Class

hi all ,,
can any one tell me how to create a exception class in ABAP OOPS concept ??
if possible can give link also for document

HI Jayakumar,
Please go thru this document
Exceptions are represented by objects that are instances of exception classes. Defining an exception is, therefore, the same as creating an exception class.
All exception classes must inherit from the common superclass CX_ROOT and one of its subordinate classes:
CX_STATIC_CHECK
CX_DYNAMIC_CHECK
CX_NO_CHECK
. The assignment of exception classes to one of these three paths of the inheritance hierarchy determines the way in which the associated exceptions are propagated. There is a record of predefined exception classes CX_SY_... whose exceptions are raised in error situations in the runtime environment. These classes all inherit from CX_DYNAMIC_CHECK or CX_NO_CHECK but not from CX_STATIC_CHECK (see hierarchy in the ABAP keyword documentation).
All exception classes must begin with the prefix CX_. They are usually defined globally with the Class Builder of the ABAP Workbench. Local exception classes can, however, also be defined.
Individual (abstract) exception classes that are used as the superclass of further exception classes can be defined. The exceptions of the subordinate classes can be handled together using a superclass.
Exception classes have the following features:
Constructor
The constructor must have a predefined structure and a specific interface. With global classes, the Class Builder generates the correct constructor and sets it to an unchangeable status. The constructor has two IMPORTING parameters:
TEXTID of the SOTR_CONC type
This parameter can be used to determine which of your exception texts the exception will use.
PREVIOUS of the CX_ROOT type
This parameter can be used to assign the PREVIOUS attribute a previous exception.
Methods
In exception classes, you can define your own methods. The following two predefined methods are inherited from the root class CX_ROOT:
GET_TEXT
Sends back the exception texts of a class (controlled by the TEXTID attribute) as a string.
GET_SOURCE_POSITION
Returns the program name, the name of a possible include program, and the line number of the statement that raised the exception.
Attributes
The attributes of exception classes are used to transport additional information on an error situation to the handler. The main piece of information is, however, always the fact that an exception of a particular class has occurred. The following attributes are inherited from CX_ROOT:
TEXTID
Used to specify the exception of a class more precisely by using several exception texts. Is evaluated in the GET_TEXT method.
PREVIOUS
If an exception is mapped to another exception, a reference to the original exception can be defined in this attribute via the EXPORTING addition of the RAISE EXCEPTION statement and by means of the constructor IMPORTING PARAMETER with the same name. This can result in a chain of exception objects. In the event of a runtime error, the exception texts of all the exceptions in the chain are output. Mapping an exception to another exception is only beneficial if the context in which the original exception occurred is important for characterizing the error situation.
KERNEL_ERRID
The name of the associated runtime error is stored in this attribute if the exception was raised by the runtime environment, for example, COMPUTE_INT_ZERODIVIDE with a division by zero. If the exception is not handled, precisely this runtime error occurs.
Parameters cannot be transferred to the constructor for this attribute. If the exception is raised with RAISE EXCEPTION, the attribute is set to initial.
Global Exception Classes
Global exception classes are defined and managed in the Class Builder. If the correct naming convention (prefix CX_) and the class type Exception Class is chosen when a new class is created, the Class Builder automatically becomes the Exception Builder.
The Exception Builder offers precisely the functionality required to define exception classes and generates independently-defined components that must not be changed. When classes are created, the category of the exception must be specified, in other words, whether it is to inherit from CX_STATIC_CHECK, CX_DYNAMIC_CHECK, or CX_NOCHECK.
Tab Pages of the Exception Builder
The Exception Builder has the tab pages Properties, Attributes, Methods, and Texts.
The properties do not normally need to be changed.
Except for the four inherited attributes mentioned above, further public attributes can be generated by the Exception Builder. The contents of these attributes specify the exception more clearly and manage the exception texts.
All of the methods are inherited from CX_ROOT. New methods cannot be added. The instance constructor is generated automatically. It ensures that, when an exception is raised, the attributes have the right values. It also transfers the text of the superclass for an exception class whose exception text is not specified explicitly.
The instance constructor is generated on the basis of the attributes, which are set up on the basis of the exception texts. Changing the attributes in superclasses can, therefore, invalidate the constructors of subordinate classes. The constructors of subordinate classes can be regenerated under Utilities ® CleanUp ® Constructor.
Texts are a special feature of exception classes and the Exception Builder. For further information, refer to Exception Texts.
Local Exception Classes
Local exception classes can be defined for specific exceptions that only occur within one single ABAP program. The condition for a local exception class is that it inherits from one of the three classes CX_STATIC_CHECK, CX_DYNAMIC_CHECK, or CX_NO_CHECK, or from their subordinate classes. An individual constructor and individual attributes can be created. Individual methods should not be created, however, and the methods of superclasses should not be redefined.
Examples of Local Exception Classes
report DEMO_LOCAL_EXCEPTION_1.
class CX_LOCAL_EXCEPTION definition
                        inheriting from CX_STATIC_CHECK.
endclass.
start-of-selection.
    try.
      raise exception type CX_LOCAL_EXCEPTION.
    catch CX_LOCAL_EXCEPTION.
      message 'Local Exception!' type 'I'.
endtry.
This example shows a minimal local exception class, which is simply the local representation of one of the three direct subordinate classes of CX_ROOT. It can be used in the program.
report DEMO_LOCAL_EXCEPTION_2.
class CX_LOCAL_EXCEPTION definition
                        inheriting from CX_STATIC_CHECK.
public section.
    data LOCAL_TEXT type STRING.
    methods CONSTRUCTOR importing TEXT type STRING.
endclass.
class CX_LOCAL_EXCEPTION implementation.
method CONSTRUCTOR.
    SUPER->CONSTRUCTOR( ).
    LOCAL_TEXT = TEXT.
endmethod.
endclass.
data OREF type ref to CX_LOCAL_EXCEPTION.
start-of-selection.
    try.
      raise exception type CX_LOCAL_EXCEPTION
                      exporting TEXT = `Local Exception`.
    catch CX_LOCAL_EXCEPTION into OREF.
      message OREF->LOCAL_TEXT type 'I'.
endtry.
In this example, the exception class from the previous example is extended to include an individual attribute and constructor. The IMPORTING parameter of the constructor must be supplied when the exception is raised (it is required here). The attribute can be evaluated in the handler of the exception.
report DEMO_LOCAL_EXCEPTION_3.
class CX_LOCAL_EXCEPTION definition
      inheriting from CX_SY_ARITHMETIC_ERROR.
public section.
    methods CONSTRUCTOR importing SITUATION type STRING.
endclass.
class CX_LOCAL_EXCEPTION implementation.
method CONSTRUCTOR.
    SUPER->CONSTRUCTOR( OPERATION = SITUATION ).
endmethod.
endclass.
data OREF type ref to CX_LOCAL_EXCEPTION.
data TEXT type STRING.
start-of-selection.
    try.
      raise exception type CX_LOCAL_EXCEPTION
            exporting SITUATION = `START-OF-SELECTION`.
    catch CX_LOCAL_EXCEPTION into OREF.
      TEXT = OREF->GET_TEXT( ).
      message TEXT type 'I'.
endtry.
In this example, an exception class is derived from one of the predefined exception classes for error situations in the runtime environment. An individual constructor is defined with an individual IMPORTING parameter that supplies the superclass constructor with this parameter. When the exception is handled, the exception text, as defined in the superclass, is read with GET_TEXT.

Creating instances in Java Papi

Hi all,
Actually,I am a newbie to aqualogic bpm.I have written a papi code in java to get process instances directly from studio workspace.Now, I want to crate process instances in java papi code itself and then getting those instances.I don't know how to do that.Can anybody help please?

Hi Dan,
That's pretty good but it is exposing all methods and that's a WSDL file.. Here is some PAPI-WS code that somebody on some other thread put up.. But it does not work properly.. Do you know what files to import to the JAVA project to make it to work?
import java.net.MalformedURLException;
import java.rmi.RemoteException;
import javax.xml.rpc.ServiceException;
import com.bea.albpm.PapiWebService.OperationException;
public class CreateInstances {
public static void main(String[] args) throws MalformedURLException, ServiceException, OperationException, RemoteException {
java.net.URL url = null;
org.apache.axis.EngineConfiguration config = null;
com.bea.albpm.PapiWebService.PapiWebServicePortBindingStub binding = null;
com.bea.albpm.PapiWebService.InstanceInfoBean value = null;
//String processId = "/Proceso1";
//String processId = "/ActividadesExternas";
String processId = "/PAPIWS";
String argumentsSetName = "BeginIn";
//Binding
//url = new java.net.URL("http", "localhost", 8686, "/papiws/PapiWebServiceEndpoint");
url = new java.net.URL("http", "localhost", 8585, "/papiws/PapiWebServiceEndpoint");
config = new org.apache.axis.configuration.FileProvider("client_deploy.wsdd");
binding = (com.bea.albpm.PapiWebService.PapiWebServicePortBindingStub) new com.bea.albpm.PapiWebService.PapiWebService_ServiceLocator(config).getPapiWebServicePort(url);
binding.setTimeout(60000);
//Arguments
com.bea.albpm.PapiWebService.ArgumentsBeanArgumentsEntry argumentsBeanArgumentsEntry[] = new com.bea.albpm.PapiWebService.ArgumentsBeanArgumentsEntry[1];
argumentsBeanArgumentsEntry[0] = new com.bea.albpm.PapiWebService.ArgumentsBeanArgumentsEntry();
argumentsBeanArgumentsEntry[0].setKey("entradaArg");
argumentsBeanArgumentsEntry[0].setValue("Instancia creada de forma externa mediante PAPI-WS 2.0");
com.bea.albpm.PapiWebService.ArgumentsBean argumentsBean = new com.bea.albpm.PapiWebService.ArgumentsBean(argumentsBeanArgumentsEntry);
com.bea.albpm.PapiWebService.holders.ArgumentsBeanHolder argumentsBeanHolder = new com.bea.albpm.PapiWebService.holders.ArgumentsBeanHolder(argumentsBean);
//Create instance
value = binding.processCreateInstance(processId, argumentsSetName, argumentsBeanHolder);
System.out.println("Created instance -> InstanceInfo.id = " + value.getId());
Edited by: user8752903 on Oct 28, 2009 8:49 AM

Create instance of class

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