[AXIS-2775] ClassCastException in org.apache.axis.Message.setup()

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.2
• Component/s: Basic Architecture
• Environment: Windows, Weblogic Server 10.0 MP1
• Assignee: Unassigned
• Reporter: Oumar Aziz OUATTARA
• Created: 04/Feb/09 09:23
• Updated: 04/Feb/09 09:23

Description

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