ClassCastException in org.apache.axis.Message.setup()
-----------------------------------------------------
Key: AXIS-2775
URL: https://issues.apache.org/jira/browse/AXIS-2775
Project: Axis
Issue Type: Bug
Components: Basic Architecture
Affects Versions: 1.2
Environment: Windows, Weblogic Server 10.0 MP1
Reporter: Oumar Aziz OUATTARA
There is a class cast exception in this Class of Axis when casting to
"Attachments".
java.lang.ClassCastException: org.apache.axis.attachments.AttachmentsImpl
at org.apache.axis.Message.setup(Message.java:344)
at org.apache.axis.Message.(Message.java:246)
at
org.apache.axis.soap.MessageFactoryImpl.createMessage(MessageFactoryImpl.java:54)
at test.TestBean.testingMethod(TestBean.java:38)
In fact the bug has been noticed on an old axis but it's still on the svn trunk
:
<quotes>
attachImpl = ClassUtils.forName(attachImpName);
....
Constructor attachImplConstr = attachImpl.getConstructors()[0];
try {
mAttachments = (Attachments) attachImplConstr.newInstance(
new Object[] { initialContents,
contentType, contentLocation});
....
</quotes>
The ClassUtils class is using dynamic classloading. and implements it well. The
problem is, using this mechanism, you can retrieve a Class object that doesn't
come from the current class loader. Then casting to Attachments, will try to
cast to a Class from a different class loader.
To handle such a case, the JDK included a class called Proxy (
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/reflect/Proxy.html ). Using
this class should easily solve the issue.
Best Regards
wattazoum
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