Exception in thread "main" java.lang.RuntimeException: The root object can neither be an abstract class nor interface: "javax.xml.datatype.XMLGregorianCalendar
at io.protostuff.runtime.RuntimeSchema.createFrom(RuntimeSchema.java:212)
at io.protostuff.runtime.RuntimeSchema.createFrom(RuntimeSchema.java:187)
at io.protostuff.runtime.IdStrategy.newSchema(IdStrategy.java:115)
at io.protostuff.runtime.DefaultIdStrategy$Lazy.getSchema(DefaultIdStrategy.java:708)
at io.protostuff.runtime.RuntimeSchema.getSchema(RuntimeSchema.java:149)
at io.protostuff.runtime.RuntimeSchema.getSchema(RuntimeSchema.java:140)
at Main.main(Main.java:20)
