Java Persistence/What is new in JPA 2.1?

The JPA 2.1 specification adds several enhancements to the JPA 2.0 specification including:
 * Converters - allowing custom code conversions between database and object types.
 * Criteria Update/Delete - allows bulk updates and deletes through the Criteria API.
 * Stored Procedures - allows queries to be defined for database stored procedures.
 * ConstructorResult support for SQLResultSetMapping
 * Runtime creation of named queries
 * Injectable EntityListeners
 * Unsynchronized persistence contexts
 * DDL generation - automatic table, index and schema generation.
 * Entity Graphs - allow partial or specified fetching or merging of objects.
 * JPQL/Criteria enhancements - arithmetic sub-queries, generic database functions, join ON clause, TREAT option.

Resources

 * JPA 2.1 Spec
 * JPA 2.1 Reference Implementation (EclipseLink)

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