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Alright, made some progress. When specifying after and before filters it seems to have effect, however I've found one issue when trying to setup a configuration simulating default classloading behavior for ear deployments.

For ear deployments default is parent-first="false" ie. parent-policy "AFTER_BUT_JAVA_BEFORE".

When setting up jboss-classloading-domain.xml this changes to parent-first="true" ie. parent-policy "BEFORE"

So what I tried was to modify jboss-classloading.xml to simulate the default behavior based on ParentPolicy class:

/** Java and Javax classes before, everything else after */
   public static final ParentPolicy AFTER_BUT_JAVA_BEFORE = new ParentPolicy(ClassFilterUtils.JAVA_ONLY, ClassFilterUtils.EVERYTHING, "AFTER_BUT_JAVA_BEFORE");

To start from the beginning, I've setup:

<?xml version="1.0" encoding="UTF-8"?>
<classloading-domain xmlns="urn:jboss:classloading-domain:1.0" name="jboss.j2ee:extension=LoaderRepository,service=EARDeployment,url=&apos;myapp.ear&apos;" parent-domain="DefaultDomain">
<parent-policy>
  <before-filter>
   <javabean xmlns="urn:jboss:javabean:2.0" class="org.jboss.classloader.plugins.filter.JavaOnlyClassFilter" />
  </before-filter>
  <after-filter>
   <javabean xmlns="urn:jboss:javabean:2.0" class="org.jboss.classloader.plugins.filter.EverythingClassFilter" />
  </after-filter>
</parent-policy>
</classloading-domain>

However both JavaOnlyClassFilter and EverythingClassFilter have private constructor so I'm getting:

java.lang.RuntimeException: Error constructing javabean

Caused by: java.lang.IllegalAccessException: Class org.jboss.reflect.plugins.introspection.ReflectionUtils can not access a member of class org.jboss.classloader.plugins.filter.JavaOnlyClassFilter with modifiers "private"

And by the way - specifying multiple beans within one filter will work?

like for example:

<before-filter>
   <javabean xmlns="urn:jboss:javabean:2.0" class="org.jboss.classloader.plugins.filter.JavaOnlyClassFilter" />
   <javabean xmlns="urn:jboss:javabean:2.0" class="org.jboss.classloader.plugins.filter.NegatingClassFilter">
    <constructor>
     <parameter>
      <javabean xmlns="urn:jboss:javabean:2.0" class="org.jboss.classloader.spi.filter.RecursivePackageClassFilter">
       <constructor>
        <parameter>org.hibernate</parameter>
       </constructor>
      </javabean>
     </parameter>
    </constructor>
   </javabean>
  </before-filter>