Enums

Default Behavior

By default, Java enums are serialized/deserialized as strings. That is, for serialization, the toString method will be used on the specified enum constant. For deserialization, Enum.valueOf is used.

Individual References

In case the enum is used as an object property value and its constants are mapped using the @Individual annotation from JOPA, they will be mapped to the corresponding individuals. See the JOPA Wiki for details on enum mapping in entities if necessary.

For example, if the enum looks as follows:

public enum OwlPropertyType {
  @Individual(iri = "http://www.w3.org/2002/07/owl#AnnotationProperty")
  ANNOTATION_PROPERTY,
  @Individual(iri = "http://www.w3.org/2002/07/owl#DatatypeProperty")
  DATATYPE_PROPERTY,
  @Individual(iri = "http://www.w3.org/2002/07/owl#ObjectProperty")
  OBJECT_PROPERTY;
}

and a class contains an attribute with OwlPropertyType as value:

@OWLObjectProperty(iri = "http://example.org/attributes/has-property-type")
OwlPropertyType propertyType;

A value of DATATYPE_PROPERTY will be serialized as (assuming serialization without context):

"http://example.org/attributes/has-property-type": {
  "@id": "http://www.w3.org/2002/07/owl#DatatypeProperty"
}

Deserialization works conversely.