Hi,
I'm trying to use XmlBeans (2.3) with different versions of a schema
in a web application.
Background story ... (what I want ...)
So lets say we have a schema for an element called "headstats",
which is also the root element. In all the schemas I would
introduce an attribute "version" in the root element and by
pre-parsing (or something else) I would know the version of
that xml beforehand.
The types would be suffixed with the version, so the element
headstats would belong to the headstats10 type.
The problem ...
The XmlBeans-Faq suggest to use multiple class loaders if
the elements have the same name in different schemas.
So what I've tried is to seperate the java classes and
the generated xsb files in two jars.
The java classes (headstats10-java.jar) go into the
WEB-INF/lib directory and will be in the classloader of
the calling webapp code.
The xsb files (headstats10-schema.jar) go into directory
not covered by the webapp-container.
This is how I wanted to get the xmlbean:
private void testClassLoaderInner() throws Exception {
ClassLoader ctxCL = Thread.currentThread().getContextClassLoader();
// maybe overwriting the context class loader here ???
URL urljava = ctxCL.getResource("WEB-INF/lib/headstats10-java.jar");
URL urlschema = ctxCL.getResource("WEB-INF/schema/headstats10-schema.jar");
ClassLoader myCL = new URLClassLoader(new URL[]{urlschema,urljava}, ctxCL);
SchemaTypeLoader stl = XmlBeans.typeLoaderForClassLoader(myCL);
TouchpointListType tlt =
(TouchpointListType)stl.newInstance(TouchpointListType.type, null);
TouchpointType tt = tlt.addNewTouchpoint();
}
... but in the generated code of the TouchpointListType there is a reference
on the webapp classloader (...class.getClassLoader()) and not my
SchemaTypeLoader
public interface TouchpointListType extends org.apache.xmlbeans.XmlObject
{
public static final org.apache.xmlbeans.SchemaType type =
(org.apache.xmlbeans.SchemaType)
org.apache.xmlbeans.XmlBeans.typeSystemForClassLoader(TouchpointListType.class.getClassLoader(),
"schemaorg_apache_xmlbeans.system.s83BE290BC2BDEAA4F2C07CDF89814312").resolveHandle("touchpointlisttypecf0atype");
... so I will get a NoClassDefFoundError or similar.
Any suggestions how solve that classloader problem or how to
support different versions of a schema?
Thanks for your help,
Andreas Beeker.
