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Differences between JPA and JPA2 [closed]

Tags:

java

jpa

jakarta-ee

jpa-2.0

Does anyone have a list of the changes between JPA 1 and JPA 2? I have read about the Criteria queries and other changes, but I would like a "what's new" kind of reference. Thanks

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Guillermo Vasconcelos Avatar asked Aug 27 '09 15:08

Guillermo Vasconcelos

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1 Answers

Google returns many results, including this and this blog posts. The summary (copied from the former) is:

  • Added support for persistently ordered lists using OrderColumn and provider-managed ordering column
  • Defined support for foreign key mapping strategy for unidirectional one-to-many relationships
  • Added clear method to EntityManager interface to allow entities to be evicted from the persistence context; added CLEAR cascade option.
  • Added Cache interface.
  • Added support for pessimistic locking and new lock mode types.
  • Added overloaded find and refresh methods added to support locking with standardized and vendor-specific properties and hints.
  • Added standardized hint javax.persistence.lock.timeout for use in locking configuration.
  • Added the standardized properties javax.persistence.jdbc.driver, javax.persistence.jdbc.url, javax.persistence.jdbc.user, javax.persistence.jdbc.password for use in persistence unit and entity manager factory configuration.
  • Added Query getNamedParameters and getPositionalParameters methods.
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ChssPly76 Avatar answered Sep 18 '22 20:09

ChssPly76
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