Java2 Security exception in ContributionHelper.getNestedJarUrls method

The following exception occurs when run with java2 security. This has cropped up because we are now trying to read nested jars within a jar contribution
java.lang.IllegalStateException: java.lang.reflect.InvocationTargetException

Caused by: java.security.AccessControlException: Access denied (java.io.FilePermission c:\opt\Moonstone\WAS\profiles\node1\installedAssets\calcSharedLib.jar\BASE\calcSharedLib.jar read)
at java.security.AccessController.checkPermission(AccessController.java:108)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:544)
at com.ibm.ws.security.core.SecurityManager.checkPermission(SecurityManager.java:208)
at java.lang.SecurityManager.checkRead(SecurityManager.java:883)
at java.io.File.isDirectory(File.java:763)
at org.apache.tuscany.sca.contribution.java.impl.ContributionHelper.getNestedJarUrls(ContributionHelper.java:41)
at org.apache.tuscany.sca.contribution.java.impl.ClassLoaderModelResolver.getContributionURLs(ClassLoaderModelResolver.java:72)
at org.apache.tuscany.sca.contribution.java.impl.ClassLoaderModelResolver.(ClassLoaderModelResolver.java:77)
at com.ibm.ws.soa.sca.oasis.contribution.java.WASSCAClassLoaderModelResolver.(WASSCAClassLoaderModelResolver.java:49)