Implement support for the new Java 8 temporal Java types (JSR 310).
The initial implementation defines the following Types:
org.hibernate.type.DurationType - Maps a java.time.Duration to a SQL BIGINT (Long) representing the duration-in-nanoseconds.
org.hibernate.type.InstantType - Maps a java.time.Instant to a SQL TIMESTAMP
org.hibernate.type.LocalDateTimeType - Maps a java.time.LocalDateTime to a SQL TIMESTAMP
org.hibernate.type.LocalDateType - Maps a java.time.LocalDate to a SQL DATE
org.hibernate.type.LocalTimeType - Maps a java.time.LocalTime to a SQL TIME
org.hibernate.type.OffsetDateTimeType - Maps a java.time.OffsetDateTime to a SQL TIMESTAMP
org.hibernate.type.OffsetTimeType - Maps a java.time.OffsetTime to a SQL TIME
org.hibernate.type.ZonedDateTimeType - Maps a java.time.ZonedDateTime to a SQL TIMESTAMP
As this relies on Java 8 and Hibernate still maintains compatibility back to Java 6, a new module hibernate-java8 was added to isolate the Java 8 compatibility to just these classes. We will fold the classes from this module into hibernate-core once we baseline one Java 8.
It would be cool to be able to persist the date time types newly introduced in Java 8 in a reasonable way. Currently the values are persisted as blobs effectively.
There are already a user type implementations for the backport project of JSR-310 but they unfortunately don't work with the types from the java.time package. The support has also been requested in the user forums.