getting "SecurityException" while using JAXB generated Java classes from different project

Amit Jain <>
Thu, 6 Aug 2009 05:16:55 -0700 (PDT)
Hi All,
Again help needed :)

I am getting following exception while unmarshalling.
---- Stack Trace Starts ----
java.lang.SecurityException: class "javax.xml.bind.JAXBElement"'s
signer information does not match signer information of other classes
in the same package
at java.lang.ClassLoader.checkCerts(
    at java.lang.ClassLoader.preDefineClass(
    at java.lang.ClassLoader.defineClass(
    at Method)
    at java.lang.ClassLoader.loadClass(
    at sun.misc.Launcher$AppClassLoader.loadClass(
    at java.lang.ClassLoader.loadClass(
    at java.lang.ClassLoader.loadClassInternal(
---- Stack Trace Ends ----
After analyzing stack trace its seems problem occur while trying to
access classes from different project. But if its a requirement that
we need to separte the "generate JAXB Java classes from an XML schema"
with those class which are used to traverse the xmls.

I am using to Java project "JAXBDemo" and "JAXB-USE"
1. In first project (JAXBDemo) I Generate JAXB Java classes from an
XML schema.
2. In second project (JAXB-USE) I am trying to read
"booking_detail.xml" using JAXB java classes (generated file from
first project).

---- build.xml (to generate jaxb classes) ----
<project name="JAXBDemo" default="main" basedir=".">
    <taskdef name="xjc" classname="">
    <fileset dir="C:\lib\XML_API\JAXB_Libs" includes="*.jar" />
    <fileset dir="C:\jwsdp1.4\jwsdp-shared\lib" includes="*.jar" />
    <pathelement location="classes"/>
     <target name="generate">
          <xjc target="src" removeOldOutput="yes"
                <schema dir="C:\Workspace\JAXBDemo\xsd"
      <target name="main" depends="generate"></target>

---- Java Code Starts-----

public class JaxbImpl {
public static void main(String[] args) {
   JAXBContext jaxbContext;
   try {
       jaxbContext = JAXBContext.newInstance("");
       Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
       JAXBElement<CourseBooking> bookingElement =
unmarshaller.unmarshal(new File("C:/Workspace/JAXB-USE/xml/
   }catch( JAXBException je ) {

------- Java Code Ends --------

Thank U in Advance...

Amit Jain

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