Creating class via reflection

Hi,
Is there a possibility to create dynamically class and add to it methods/fileds/annotaions etc.
What I am thinking of is to create jpa entity class dynamiclly and use jpa provider to create table for it.

Not with reflection, no. You need something like BCEL or ASM for that. But what are you hoping to achieve? You create a JPA entity "dynamically". Fine. Then what? How does your code know what to do with it? How will data get into it? What's caused you to come up with this idea?

Similar Messages

Loading a class via reflection without knowing the full qualified path ?

Hi there
I d like to load a class via reflection and call the constructor of the class object. My problem is that I dont know the full qulified name e.g. org.xyz.Classname bur only the Classname.
I tried different things but none seem to work:
 1. Class c = Class.forName("Classname"); //does not suffice, full qualified name required
2. ClassLoader classloader = java.lang.ClassLoader.getSystemClassLoader();
 try {
 Class cl = classloader.loadClass(stripFileType(Filename));//if i do not pass the full qualified name i get a ClassNotFoundException
3. I tried to consruct a class object with my own classloader , calling:
 Class cl = super.defineClass(null, b, 0, b.length ); b is of type byte[]This almost works. I get a class Object without knowing the full qulified path. I can transform a filename into a raw array of bytes and I get the class out of it. But there is still a problem: If there are more than on classes defined in the same textfile I get an InvocationTargetException.
It looks like this:
package org.eml.adaptiveUI.demo;
import com.borland.jbcl.layout.*;
import java.awt.*;
import org.eml.adaptiveUI.layout.*;
import javax.swing.*;
import java.awt.event.*;
* Title: 
* Description: 
* Copyright: Copyright (c) 2003
* Company: 
* @author not attributable
* @version 1.0
public class twoButtons extends JFrame {
SPanel sPanel1 = new SPanel();
JButton jButton1 = new JButton();
GridBagLayout gridBagLayout1 = new GridBagLayout();
GridBagLayout gridBagLayout2 = new GridBagLayout();
public twoButtons() throws HeadlessException {
 try {
 jbInit();
 catch(Exception e) {
 e.printStackTrace();
public static void main(String args[]){
 twoButtons twob = new twoButtons();
 twob.pack();
 twob.show();
private void jbInit() throws Exception {
 this.getContentPane().setLayout(gridBagLayout1);
 jButton1.setText("button 1");
 jButton1.addActionListener(new TransformationDemo_jButton1_actionAdapter(this));
 this.getContentPane().add(sPanel1, new GridBagConstraints(0, 0, 1, 1, 1.0, 1.0
 ,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(57, 52, 94, 108), 35, 44));
 sPanel1.add(jButton1, new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0
 ,GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(5, 41, 0, 0), 0, 0));
void jButton1_actionPerformed(ActionEvent e) {
 System.out.println("button 1 source: " + e.getSource());
 System.out.println("d: " + e.getID());
 System.out.println("/n commmand: " + e.getActionCommand());
class TransformationDemo_jButton1_actionAdapter implements java.awt.event.ActionListener {
twoButtons adaptee;
TransformationDemo_jButton1_actionAdapter(twoButtons adaptee) {
 this.adaptee = adaptee;
public void actionPerformed(ActionEvent e) {
 adaptee.jButton1_actionPerformed(e);
}As you can see there is the class TransformationDemo_jButton1_actionAdapter class defined in the same classfile. The problem is now that the twoButtons constructor calls the TransfomationDemo_jButton1_actionAdapter constructor and this leads to InvocationTargetException. I dont know if this is a java bug because it should be possible.
Can you help me?

hi thanks at first,
the thing you mentioned could be a problem, but I dont think it is.
If I have the full qualified name (which I havent) then everything goes normal. I only have to load the "twoButtons" class and not the other (actionadapter class), so I dont think this is the point. In this case the twoButtons constructor constructs an object of the actionadapter class and everything goes well. The bad thing is though that I do not have the full qulified name :(
Invocation target exception tells me (in own words): Tried to acces the constructor of the actionadapter class (which is not public) out of class reflectionTest class .
reflectionTest is the class where the reflection stuff happens and the twoButttons class is defineClass() ed.
The problem is, only twoButtons class has the rights to call methods from the actionadapter class, the reflection class does not. BUT: I do not call the actionadapter methods from the reflection class. I call them only from the twoButtons class.
I hope somebody understands my problem :)

How to instantiate class via reflection

Hi, I want to generically instatiate classes, but obviously Class.newInstance only works if the class has a public no args constructor. Is there any way to instantiate classes without such a constructor via reflection? It would be sufficient for me if I could use a private no args constructor.
I already tried the following:
Class clazz = Class.forName( "classname" );
Constructor constructor =
clazz.getDeclaredConstructor( new Class[] { } );
constructor.setAccessible( true );
object = constructor.newInstance( new Object[] {} );
But it, too, yielded to an IllegalAccessException.

Class clazz = Class.forName( "classname" );
Constructor constructor =
clazz.getDeclaredConstructor( new Class[] { } );
constructor.setAccessible( true );
object = constructor.newInstance( new Object[] {} );
But it, too, yielded to an IllegalAccessException.constructor.setAccessible( true );
is the call that generates the IllegalAccessException. Your code must be allowed to supress access checks. This is always the case if you don't have a security manager, otherwise the security manger's checkPermission method is called with an ReflectPermission("supressAccessChecks") argument.
Either that or the getDeclaredConstructor throws the exception, in that case your code must be allowed to "check member access".
Hope it helped,
Daniel

Set fields of derived class in base class constructor via reflection?

Does the Java Language Specification explicitly allow setting of fields of a derived class from within the base class' constructor via reflection? The following test case runs green, but I would really like to know if this Java code is compatible among different VM implementations.
Many thanks for your feedback!
Norman
public class DerivedClassReflectionWorksInBaseClassConstructorTest extends TestCase {
abstract static class A {
    A() {
        try {
            getClass().getDeclaredField("x").setInt(this, 42);
        } catch (Exception e) {
            throw new RuntimeException(e);
static class B extends A {
    int x;
    B() {
    B(int x) {
        this.x = x;
public void testThatItWorks() {
    assertEquals(42, new B().x);
    assertEquals(99, new B(99).x);
}

why not just put a method in the superclass that the subclasses can call to initialize the subclass member variable?In derived classes (which are plug-ins), clients can use a field annotation which provides some parameter metadata such as validators and the default value. The framework must set the default value of fields, before the class' initializer or constructors are called. If the framework would do this after derived class' initializer or constructors are called, they would be overwritten:
Framework:
public abstract class Operator {
    public abstract void initialize();
}Plug-In:
public class SomeOperator extends Operator {
    @Parameter(defaultValue="42", interval="[0,100)")
    double threshold;
    @Parameter(defaultValue="C", valueSet="A,B,C")
    String mode;
    public void setThreshold(double threshold) {this.threshold = threshold;}
    public void setMode(String mode) {this.mode = mode;}
    // called by the framework after default values have been set
    public void initialize() {
}On the other hand, the default values and other metadata are also used to create GUIs and XML I/O for the derived operator class, without having it instantiated. So we cannot use the initial instance field values for that, because we don't have an instance.

Calling EJB facades via class instantiated via reflection?

We are loading plugins via Java reflection. Anything instantiated via newInstance() does not appear to have access to the Local interface.
Right now, to get to the session bean we must use the Remote interface. This is annoying due to the performance, and seems completely unnecessary when everything is operating in one JVM.
Tests were done to print out the JNDI namespace and the local interfaces don't seem to be accessible. Any advice?

My project consists of an EJB package and WAR. I have not had any problem calling the local facades from JSP, Servlet, or web service in the EJB package.
Further, I can use XStream reflection and do local EJB calls.
It baffles me why I can't do the local calls in some classes via InitialContext lookups.
I will post test code next week.

Unable to create Organization via amConsole

Hi I am unable to create Organization via amConsole, I log in as amAdmin and it has role of Top-Level Admin and has Full Access.
I am able to create users , Groups and other stuff, but Adding new Organization or Modifyin Organization fails, what could be the reason?

This is debug message in amSDK:
DataLayer.addEntry retry: 0
03/30/2007 12:13:48:261 PM EST: Thread[service-j2ee,5,main]
WARNING: Exception in DataLayer.addEntry for DN: o=zxvzxcxzz,dc=xyz,dc=com
netscape.ldap.LDAPException: error result (65); Object class violation
at netscape.ldap.LDAPConnection.checkMsg(LDAPConnection.java:4866)
at netscape.ldap.LDAPConnection.add(LDAPConnection.java:2851)
at netscape.ldap.LDAPConnection.add(LDAPConnection.java:2866)
at netscape.ldap.LDAPConnection.add(LDAPConnection.java:2816)
at com.iplanet.ums.DataLayer.addEntry(DataLayer.java:443)
at com.iplanet.ums.PersistentObject.addChild(PersistentObject.java:722)
at com.iplanet.am.sdk.ldap.DirectoryManager.createOrganization(DirectoryManager.java:1209)
at com.iplanet.am.sdk.ldap.DirectoryManager.createEntry(DirectoryManager.java:1532)
at com.iplanet.am.sdk.AMDirectoryManager.createEntry(AMDirectoryManager.java:651)
at com.iplanet.am.sdk.AMCacheManager.createEntry(AMCacheManager.java:337)
at com.iplanet.am.sdk.AMObjectImpl.create(AMObjectImpl.java:1009)
at com.iplanet.am.sdk.AMOrganizationImpl.createSubOrganizations(AMOrganizationImpl.java:137)
at com.iplanet.am.console.user.model.UMCreateOrgModelImpl.createOrganization(UMCreateOrgModelImpl.java:223)
at com.iplanet.am.console.user.UMCreateOrgViewBean.createOrg(UMCreateOrgViewBean.java:239)
at com.iplanet.am.console.user.UMCreateOrgViewBean.handleBtnCreateRequest(UMCreateOrgViewBean.java:188)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.iplanet.jato.view.command.DefaultRequestHandlingCommand.execute(DefaultRequestHandlingCommand.java:183)
at com.iplanet.jato.view.RequestHandlingViewBase.handleRequest(RequestHandlingViewBase.java:308)
at com.iplanet.jato.view.ViewBeanBase.dispatchInvocation(ViewBeanBase.java:802)
at com.iplanet.jato.view.ViewBeanBase.invokeRequestHandlerInternal(ViewBeanBase.java:740)
at com.iplanet.jato.view.ViewBeanBase.invokeRequestHandler(ViewBeanBase.java:571)
at com.iplanet.jato.ApplicationServletBase.dispatchRequest(ApplicationServletBase.java:957)
at com.iplanet.jato.ApplicationServletBase.processRequest(ApplicationServletBase.java:615)
at com.iplanet.jato.ApplicationServletBase.doPost(ApplicationServletBase.java:473)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:767)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:860)
at sun.reflect.GeneratedMethodAccessor75.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:249)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
at org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:282)
at org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:165)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:257)
at org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterChain.java:55)
at org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.java:161)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:263)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:173)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:551)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:933)
at com.sun.enterprise.web.connector.httpservice.HttpServiceProcessor.process(HttpServiceProcessor.java:226)
at com.sun.enterprise.web.HttpServiceWebContainer.service(HttpServiceWebContainer.java:2071)
03/30/2007 12:13:48:263 PM EST: Thread[service-j2ee,5,main]
Invoking _ldapPool.close(conn) : LDAPConnection {ldap://dir1.xyz.com:389 ldapVersion:3 bindDN:"cn=puser,ou=DSAME Users,dc=xyz,dc=com"}
03/30/2007 12:13:48:263 PM EST: Thread[service-j2ee,5,main]
Released Connection : LDAPConnection {ldap://dir1.xyz.com:389 ldapVersion:3 bindDN:"cn=puser,ou=DSAME Users,dc=xyz,dc=com"}

I dont understand creating classes they seem a waste of time and efficiency

I dont understand why we would want to create classes with constructors and get and set statements... I know that VB and Java did not create these just to have us writing extra code so I am missing something in my thinking.
I read about data hiding and that I understand I guess...but everytime my professors want me to create a class then create an object from that class to access it I dont really get it. I know how to do the basics of it but I can do all of it in my main or the primary class whats the benefit of creating a whole entire class such as the following?
Everytime I get an assignment and they are like create a class and I try to rack my head for a good idea but the nearest analogy I can come up with is this... creating your own class seems like one of those old straws you drink out of with all the loops, yes you can make it go around in a big loop but why waste time? you want to get to point A to point B so create the most efficient way to get there if possible.
I am sure the problem is I am not seeing something and there is some logic missing but I just am getting irritated as I am not seeing it and I am finding it, its like I add an extra obstacle course to my code for no other reason than to run through a bunch of extra tasks that I could perform in my main class or main.
input is welcome to help me arrive at some type of enlightenment thanks
Class may not be the correct wording for this as I know we have to have a class but what I mean is a non application class. The class I have below goes with another class that actually does a lot of stuff but I am forced to push data through this class that basically does nothing but run water through some different pipes if you will. To me thats a waste when I can do everything in my original class which was called menu that I am messing with and that creates an array for a user who wants to keep a list of his items and prices of those items in inventory.
public class Item
private String itemName;
private double itemPrice;
 public Item()
public Item (String item, double price)
setName(item);
setPrice(price);
public String getName()
 return itemName;
public void setName(String item)
 itemName = item;
public double getPrice()
 return itemPrice;
public void setPrice(double price)
 itemPrice= price;
Edited by: Bricatw on Oct 30, 2009 10:33 PM

What I was plugging into it and please forgive the code as its not finished... (I am still messing with it) its just for learning and I am required to have certain parts in the Item Class and Certain parts in the Menu class..... But you it pushes through the input to the java bean.... in a case like this I just dont see the need for doing it not that I can think of anyway.
import java.util.Scanner;//my imports for scanner so can read from the screen
import java.util.*;//imports for my array I used astrix to just import it all as the book said it does not have any negative affects.
public class Menu //My application class Menu that contains my main
 public static void main(String[] args)//Main method
 final int NUMBER_Of_Elements = 30; //created a symbolic constant so that I only have to change the constant
 //to edit the size of the array if I should want to change it.
 Item[]inventory = new Item[NUMBER_Of_Elements];//I create a new array object with the constant as the number of elements.
 Scanner sc = new Scanner (System.in);//created object from the scanner class used to get input from the console screen.
 System.out.println("Please enter Item on first line and price on second line.");//outputted text to prompt user and give instructions.
 System.out.println("Enter STOP to exit");//instructions on how to exit the program. I would have rather used a different
 //word than stop here. If my choice I would have used "exit" as its more widely used and to promote uniformity.
 int count;//count variable used to count my loops very important as we use it to control our arrays and loops here.
 double price;//our variable that we plug in values from the user via the console.
 String item;//same as previously mentioned for the "price"
 System.out.println("Wings Coffee Shop Menu");
 System.out.println("");
 System.out.println("Menu Item Price");
 for (count=0; count<inventory.length; ++count)//This is our for loop it uses the length method to control how many times
 //it runs. In this case inventory.length = 30 elements so would run 30 times unless it stopped early.
 item = sc.nextLine();//reads the input from console into the item variable.
 if(item.equalsIgnoreCase("STOP"))//if statement that states if = stop (ignores case sensitivity) then it will break out of the loop.
 break;//the break command which is executed if the if statement is true.
 price = Double.parseDouble(sc.nextLine());//
 inventory[count]= new Item(item, price);
 Item Call = new Item(item, price);
 System.out.printf("%-13s %.2f\n", Call.getName(), Call.getPrice());
 System.out.println("Wings Coffee Shop Menu");
 System.out.println("");
 System.out.println("Menu Item Price");
// for(int x = 0; x < count; ++x)
// System.out.printf("%15s\n",inventory[x].toString());
// System.out.printf("%-13s %.2f\n", Call.getName(), Call.getPrice());
// String[] namesOfItems = {"Coffee", "Milk", "Soda", "Bagel", "Croissant", "Donut"};
// double[] prices = {3.99, 2.99, 2.49, 2.99, 2.49, 1.99};
// for(int x = 0; x < prices.length; ++x)
// System.out.printf("%-13s %.2f\n", namesOfItems[x], prices[x]);
// Item arrayPrice = new Item(); HOW COME I CANNOT CREATE THIS OBJECT?
// Item call = new Item ();
// Item Call = new Item("item", 4.9);
Edited by: Bricatw on Oct 30, 2009 11:22 PM

Setting Fields value via reflection

I'm starting from a c# code:
 internal void RefreshFromObject(object objFromUpdate)
 if (this.GetType()==objFromUpdate.GetType())
 PropertyInfo[] fieldsFrom = objFromUpdate.GetType().GetProperties();
 PropertyInfo[] fieldsThis = this.GetType().GetProperties();
 for(int idxProp=0; idxProp<fieldsFrom.Length;idxProp++)
 if (fieldsThis[idxProp].CanWrite && fieldsFrom[idxProp].CanRead)
 fieldsThis[idxProp].SetValue(this, fieldsFrom[idxProp].GetValue(objFromUpdate,null),null);
 else
 throw new ObjectTypeNotValidException("Object type from which update current instance not valid. Use same type.");
Now I have to translate it in Java:
Class clazz = objFromUpdate.getClass();
Class thisClazz = this.getClass();
do {
 Field[] fieldsFrom = clazz.getDeclaredFields();
 Field[] fieldsThis = thisClazz.getDeclaredFields();
 try {
 fieldsThis[idxProp].set(thisClazz, fieldsFrom[idxProp].get(clazz));
 catch (IllegalAccessException iaccEx) {
 System.out.println("IllegalAccessException");
 catch (IllegalArgumentException iaccEx) {
 System.out.println("IllegalArgumentException");
clazz = clazz.getSuperclass();
thisClazz = thisClazz.getSuperclass();
} while (clazz != null && clazz != Object.class);
My problem is that I don't know if the field type is one of primitive, for which I should use the particular setters and getters.
My questions are:
1) is there in Java a more elegant way to set fields values via reflection?
2) how can I know if a field i changable (equivalent to the method CanWrite of c#?
Thanks a lot to each one that will answer me.
Marco

Hi georgemc,
thanks for replying. I-m new with java forum, so I don't know if it is correct the code tags...
Anyway... the problem is that the Field of reflected object could be both of Object types or primitive types. So I cannot use the general method "set" when changing Field's value.
Maybe somebody else had the same problem...
Seems in C# it is a very easy thing... not in java :(
Marco
Class clazz = objFromUpdate.getClass();
Class thisClazz = this.getClass();
do {
Field[] fieldsFrom = clazz.getDeclaredFields();
Field[] fieldsThis = thisClazz.getDeclaredFields();
try {
fieldsThis[idxProp].set(thisClazz, fieldsFrom[idxProp].get(clazz));
catch (IllegalAccessException iaccEx) {
System.out.println("IllegalAccessException");
catch (IllegalArgumentException iaccEx) {
System.out.println("IllegalArgumentException");
clazz = clazz.getSuperclass();
thisClazz = thisClazz.getSuperclass();
} while (clazz != null && clazz != Object.class);

How can I create classes dynamically?

Guys
My requirment is I want to create classes and their instancess too dynamically. First is it possible in Java?
If so, then my next question is how can I refer such dynamically created classes in my code to avoid compilation error.
Thanks in advance
Regards
Sunil

For other ways to generate classes on runtime you could also have a look at BCEL:
http://jakarta.apache.org/bcel
And dynamic proxies:
http://java.sun.com/j2se/1.4.2/docs/guide/reflection/proxy.html
If so, then my next question is how can I refer such
dynamically created classes in my code to avoid compilation
error.Generally the classes that you load should either implement some interface or extend some abstract class you know of at compile time so that the compiler knows what methods are available for use. If that's not possible you can only use reflection.

Create Class objects from an Array of File Objects

Hi There,
I'm having extreme difficulty in trying to convert an array of file objects to Class objects. My problem is as follows: I'm using Jfilechooser to select a directory and get an array of files of which are all .class files. I want to create Class objects from these .class files. Therefore, i can extract all the constructor, method and field information. I eventually want this class information to display in a JTree. Very similar to the explorer used in Netbeans. I've already created some code below, but it seems to be throwing a NoSuchMethodError exception. Can anyone please help??
Thanks in advance,
Vikash
/* the following is the class im using */
class FileClassLoader extends ClassLoader {
private File file;
public FileClassLoader (File ff) {
this.file = ff;
protected synchronized Class loadClass() throws ClassNotFoundException {
Class c = null;
try {
// Get size of class file
int size = (int)file.length();
// Reserve space to read
byte buff[] = new byte[size];
// Get stream to read from
FileInputStream fis = new FileInputStream(file);
DataInputStream dis = new DataInputStream (fis);
// Read in data
dis.readFully (buff);
// close stream
dis.close();
// get class name and remove ".class"
String classname = null;
String filename = file.getName();
int i = filename.lastIndexOf('.');
if(i>0 && i<filename.length()-1) {
classname = filename.substring(0,i);
// create class object from bytes
c = defineClass (classname, buff, 0, buff.length);
resolveClass (c);
} catch (java.io.IOException e) {
e.printStackTrace();
return c;
} // end of method loadClass
} // end of class FileClassLoader
/* The above class is used in the following button action in my gui */
/* At the moment im trying to output the data to standard output */
private void SelectPackage_but2ActionPerformed(java.awt.event.ActionEvent evt) {
final JFileChooser f = new JFileChooser();
f.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
int rVal = f.showOpenDialog(Remedy.this);
// selects directory
File dir = f.getSelectedFile();
// gets a list of files within the directory
File[] allfiles = dir.listFiles();
// for loop to filter out all the .class files
for (int k=0; k < allfiles.length; k++) {
if (allfiles[k].getName().endsWith(".class")) {
try {
System.out.println("File name: " + allfiles[k].getName()); // used for debugging
FileClassLoader loader = new FileClassLoader(allfiles[k]);
Class cl = loader.loadClass();
//Class cl = null;
Class[] interfaces = cl.getInterfaces();
java.lang.reflect.Method[] methods = cl.getDeclaredMethods();
java.lang.reflect.Field[] fields = cl.getDeclaredFields();
System.out.println("Class Name: " + cl.getName());
//print out methods
for (int m=0; m < methods.length; m++) {
System.out.println("Method: " + methods[m].getName());
// print out fields
for (int fld=0; fld < fields.length; fld++) {
System.out.println("Field: " + fields[fld].getName());
} catch (Exception e) {
e.printStackTrace();
} // end of if loop
} // end of for loop
packageName2.setText(dir.getPath());
}

It's throwing the exeption on the line:
FileClassLoader loader = new FileClassLoader(allfiles[k]);
I'm sure its something to do with the extended class i've created. but i cant seem to figure it out..
Thanks if you can figure it out

Error while creating class

Error while creating class java/util/LinkedHashMap$EntryIterator
ORA-29545: badly formed class: User has attempted to load a class (java.util
.LinkedHashMap$EntryIterator) into a restricted package. Permission can be grant
ed using dbms_java.grant_permission(<user>, LoadClassInPackage...
-----Any Suggestion?
regards,
Anjan

Anjan,
Pardon me for stating the obvious, but did you do what the error message suggested? In other words, did you grant the required permission?
Good Luck,
Avi.

Updating Requisition No while creating PO via FM-BAPI_PO_CREATE1

Hi ,
Our requirement is creating Po via FM BAPI_PO_CREATE1 and we are passing data from other Application through that BAPI. Tracking field of the Application with SAP is only Requisition No.
I want to know in which field of that BAPI I'll make the entry to update Requisition No. of PO?
Thanks & Regards,
Biswajit
Edited by: Biswajit Das on Jan 11, 2009 8:36 PM

Hi bisjwat.
In the tabpi u have table paremeters.
In that u chave poitem type BAPIMEPOITEM.
with in the BAPIMEPOITEM u have the field 'PREQ_NO'.
this is the field for the po requistion number.
I think it will solve u r problem.
Thanks

How to create a via from layer 1 to 3 on a 8 layer PCB?

I'm working on a design for a 8 layer PCB with Multisim/Ultiboard v10. In Multisim under sheet properties i selected the PCB to contain 8 layers, which makes Ultiboard to create this board with 4 layer pairs and 0 top/bottom build-ups. In the PCB properties of Ultiboard i enabled micro vias and buried/blind vias but i noticed that i'm not able to allow vias between some combinations of layers.
For example i can enable vias from top to the second layer (1st inner) and from top to the fourth layer (3rd inner), but not from top to the third layer (2nd inner).
When placing a via, i can select top for the start and the 3rd layer
for the end, but it will be created as via between top and the 4th
layer, which will -of course- shorten several traces on the 4th layer.
So my questions is: Why am i not allowed to create a via, that goes from the top layer to the third layer and how to enable all possible combinations of start and ending layers for the via?
Thanks for your help
fhn
PS: sorry for my bad english :/
Message Edited by fhn on 08-22-2008 04:39 AM

I am not 100% sure about this, but what I see happening here is that you can only select certain combinations of pairs. Once that selection is made it will gey out other selections as not valid. You might want to carefully look at the options in the via selection and make sure of which layers you want vias to be on. I don't know about enabling all layers in this selection. I would assume this would not be legal from a design rules standpoint, but since most of my boards are either single or double sided I do not have the necessary experience with multi-layers to give a proper answer to that.
This is the only thing I can advise as when I went through the process I was able tio select the vias for the layers you outlined in your post.
I hope this helps somewhat as this is all can tell you.
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Config settings to gray out "Reqted Qty" field while creating TO via LT03

Hi Experts,
Could anyone please me in this. I would like to gray out "Requested Quantity" field when creating TO via LT03 transaction. Can anyone please let me know where the config setting needs to be maintained inorder to gray out the "Requested Quantity" in LT03 transaction.
Thanks for your help.
Regards,
Nagarjun

Hi,
no there is not such a functionality.
From a field settings perspective you may work at account group level, =>OBD2 or OVT0
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You may also react per authorisation. See F_KNA1_EAN. In that case you may gray out fields individually.
BR
Alain

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