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If the AssertionAttributeValidator fails to load a National implementation then it will fallback to instanciating the DefaultPolicyManagerImpl.  This is useful for testing purposes and as an example of how to build the implementation.

We use the same approach for the Integration between Protocol Teminators and the National Connector Please refer to that page for more information about the ServiceLoader.

Packaging

It is the responsibility of the PN to develop scripts to package the National implementation.  The recommended approach is to package the class (and any supporting classes) into a jar file.  This jar file must be bundled into the lib directory in the epsos-server.war.  The Swedish team have Maven scripts which fetch the war from joinup, extract, add the National jars and then create a new war.