<typedef name="Status" class="com.foo.dao.GenericEnumUserType">
   <param name="enumClass">com.foo.model.Response$Status</param>
   <param name="identifierMethod">toInt</param>
   <param name="valueOfMethod">fromInt</param>
</typedef>
<class name="com.foo.model.Response" table="response">
.
.
.
   <property name="status" type="Status" column="response_status" />

org.hibernate.MappingException: Could not determine type for: com.foo.dao.GenericEnumUserType, for columns: [org.hibernate.mapping.Column(response_status)]
        at org.hibernate.mapping.SimpleValue.getType(SimpleValue.java:266)
        at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:253)
        at org.hibernate.mapping.Property.isValid(Property.java:185)
        at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:395)
        at org.hibernate.mapping.RootClass.validate(RootClass.java:192)
        at org.hibernate.cfg.Configuration.validate(Configuration.java:984)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1169)

public class Response implements Serializable {

    public enum Status implements Serializable {
        New(0), Read(1), Unknown(-1);
        int value;

        private Status(int value) {
            this.value = value;
        }

        public Status valueOf(int value) {
            switch (value) {
                case 0 : return New;
                case 1 : return Read;
                default: return Unknown;
            }
        }

        public int toInt() {
            return value;
        }
    }
.
.
.
}