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= 5.5 Migration Guide
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2015-08-20 15:29:48 -04:00
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:toc:
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This guide discusses migration from Hibernate ORM version 5.4 to version 5.5. For migration from
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earlier versions, see any other pertinent migration guides as well.
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2016-05-03 13:21:11 -04:00
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== Background
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2018-01-17 23:02:35 -05:00
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== Known changes
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This version is very similar to Hibernate ORM 5.4; essentially it includes all bugfixes that have been
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applied to the 5.4 maintenance releases, and on top of this it introduces support for the Jakarta Persistence
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API (in addition the the JPA APIs we already support).
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=== Dom4J based XML mapping
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The implementation of Hibernate's parsing of XML mapping definitions has been entirely reimplemented based on
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JAXB rather than DOM4J, making progress to remove this ancient dependency.
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No specific issues are known at this time.
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=== Removed the ability to disable "enhanced proxies"
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The "enhanced proxies" feature has been introduced as a performance improving feature in 5.3 initially, at
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which time it was optional.
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Since then, many more corner cases have been fixed and this feature is now always enabled. Enjoy the improvements!
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No changes are expected to be needed in user code to benefit from this.
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