It is possible to fail loading some vertices

[Riduidel]

Obtained when loading a bnode corresponding to an "old-style" (read pre-0.3) Map$Entry value. Obviously this is not a tolerable behaviour, as it broke our entire application.

Caused by: com.dooapp.gaedo.blueprints.UnableToCreateException: unable to create an instance of type null
    at com.dooapp.gaedo.blueprints.GraphUtils.createInstance(GraphUtils.java:178)
    at com.dooapp.gaedo.blueprints.MapLazyLoader.loadMap(MapLazyLoader.java:55)
    at com.dooapp.gaedo.blueprints.BluePrintsPersister.loadMap(BluePrintsPersister.java:520)
    at com.dooapp.gaedo.blueprints.BluePrintsPersister.loadObjectProperties(BluePrintsPersister.java:488)
    at com.dooapp.gaedo.blueprints.BluePrintsPersister.loadObject(BluePrintsPersister.java:467)
    at com.dooapp.gaedo.blueprints.BluePrintsPersister.loadObject(BluePrintsPersister.java:441)
    at com.dooapp.gaedo.blueprints.AbstractBluePrintsBackedFinderService.loadObject(AbstractBluePrintsBackedFinderService.java:521)
    at com.dooapp.gaedo.blueprints.queries.DataTypeIterable$DataTypeIterator.next(DataTypeIterable.java:38)
    ... 108 more
Caused by: java.lang.NullPointerException
    at com.sun.enterprise.v3.server.APIClassLoaderServiceImpl$APIClassLoader.convertToResourceName(APIClassLoaderServiceImpl.java:279)
    at com.sun.enterprise.v3.server.APIClassLoaderServiceImpl$APIClassLoader.loadClass(APIClassLoaderServiceImpl.java:178)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:295)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:295)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:295)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:295)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:295)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at com.dooapp.gaedo.blueprints.transformers.EnumLiteralTransformer.canHandle(EnumLiteralTransformer.java:29)
    at com.dooapp.gaedo.blueprints.transformers.Literals.canHandle(Literals.java:67)
    at com.dooapp.gaedo.blueprints.transformers.Transformers.containsKey(Transformers.java:48)
    at com.dooapp.gaedo.blueprints.transformers.Literals.containsKey(Literals.java:48)
    at com.dooapp.gaedo.blueprints.GraphUtils.createInstance(GraphUtils.java:163)
    ... 145 more