changelog.txt

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Hibernate Changelog
===================
Changes in version 2.1.2 (4.2.2004)
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* fixed a very obscure concurrency problem with read-write cache for inverse collections
* deprecated Criteria.returnMaps() / Criteria.returnRootEntities() in favor of new ResultTransformer framework
* don't cache objects with dynamic-update="true" or <joined-subclass> mappings immediately after insert/update
* added version checking to saveOrUpdateCopy()
* fixed constraint violations that occurred when mixing identity columns with other id generation strategies
* added Sybase 11.9.2 dialect to support older versions of Sybase that do not support ANSI joins (Colm O' Flaherty)
* added Informix9Dialect (Finn McCann and Max Andersen)
* added DB2400Dialect (Peter DeGregorio)
* fixed a problem where mapping validation failure was reported as duplicate import (Michael Gloegl)
* fixed a problem with Expression.not() in MySQL (Michael Gloegl)
* added support for ResultSet.getGeneratedKeys() (David Morris, John Kristian)
* added check attribute to allow check constraints in DDL
* implicit polymorphism for Criteria queries (Shorn Tolley)
* use IF EXISTS for dropping hilo tables (Michael Gloegl)
* better exception report if deleted object is resaved by cascade
* support nested components in Example queries (Emmanuel Bernard)
* fixed a minor problem with onDelete() callbacks
* fixed an obscure problem with select-before-update
* added SunONETransactionManagerLookup (Robert Davidson)
* fixed a problem with replicate() and <joined-subclass> mappings
* made setParameterList() accept empty lists and deny null values (Max Andersen)
* validation check on query parameters now allows setParameter(x, null) (Max Andersen)
* added default-access to DTD. (Max Andersen)
* made Query.setParameterList() accept empty lists and deny null values (Max Andersen)
* allow Query.setParameter(x, null) (Max Andersen)
* queries with "select new" now cacheable
* throw meaningful exception when lazy initialization occurs on disconnected session
* added default-access to <hibernate-mapping> (Max Andersen)
* added -text support to SchemaUpdate (Max Andersen, Matt Hall)
* fixed broken implementation of embedded composite keys with createSQLQuery() (Max Andersen)
* added hibernate.cache.use_minimal_puts config property to reduce unnecessary second-level cache puts
* optimized performance of orphan delete detection (Bertrand Renuart)
* fixed problem where unnecessary UPDATE occurred after INSERT for versioned objects with collections
* WebSphereTransactionManagerLookup for WAS 5.1 (Edina Pimp)
* Criteria queries now cacheable (Mario Ivankovits)
* fixed problem with ordered, paginated queries in DB2 (Tim Collins)
* fixed a bug caching <idbag>s
* lazy="true" collections are now lazy even when available in cache
* fixed a problem with version unsaved-value="negative"
* added hibernate.cache.region_prefix config property (William Drai)
* fixed problem where configuration input streams were not closed (Rajesh Patel)

Changes in version 2.1.1 (17.12.2003)
-------------------------------------
* added optional package attribute to <hibernate-mapping>
* added <meta-value> element to allow simpler <any> mapping
* native SQL queries are now cacheable - added <synchronize> element to allow correct result set expiry
* fixed a bug in CGLIB2 integration (Chris Nockleberg)
* added NamingStrategy
* don't cache objects with formula properties immediately after insert/update
* log generated SQL to a special category
* type of property with access="field" may now be guessed using reflection

Changes in version 2.1 final (12.12.2003)
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* fixed a problem with CGLIB2 proxies and method calls inside constructors
* fixed a bug running SchemaExportTask with mappings in jar files (Tom McCune)
* allow custom persister declaration for subclasses (Nick Johnson)
* fixed handling of sequences in SchemaUpdate on Oracle (Andrew Delpha)
* fixed a bug where Iterator did not handle single null values correctly
* detect and throw exception in the case of a duplicate property mapping
* don't auto-create indexes for collection foreign keys (roll back to 2.0.x)

Changes in version 2.1 rc1 (29.11.2003)
---------------------------------------
* long identifier and discriminator column names are now safely aliased (Max Andersen)
* cleaned up mapping package to allow applications to manipulate metamodel programmatically
* fixed a recent bug where collection sort order was lost in second-level cache
* formula attribute now supported for joined-subclass mappings
* formula properties may now be used anywhere in queries
* dialect-specific query pagination for SQL Server
* fixed a bug where a long path expression ending in collection access by index missed some tables in SQL FROM clause
* fixed a very ancient performance problem where null one-to-one associations caused n+1 selects
* added Session.saveOrUpdateCopy()
* fixed some bugs in Example queries
* fixed some minor bugs in dialect-specific query pagination
* immutable entity passed to update() is now lock()ed instead
* reworked the semantics of nonstrict-read-write
* JCS cache support now deprecated
* fixed some obscure bugs in collection handling
* migrated to CGLIB2 (thanks to Chris Nockleberg)
* fixed bugs in replicate()
* fixed a bug affecting joined-subclass mappings with dynamic-update=true
* performance improvements to boolean type mappings (Bertrand Renuart)
* integrated JBoss TreeCache clustered cache (thanks to Bela Ban and Ben Wang)
* fixed a bug in new query parameter validation (Steve Ebersole)
* fixed a bug where <any> mappings caused unnecessary ObjectDeletedException at flush time
* fixed a bug where associations with property-ref mappings were not properly cached
* throw PropertyValueException when not-null properties are null at flush time
* added unsaved-value attribute to version property mapping (Emmanuel Bernard)
* tolerate classnames containing $ (Steve Ebersole)

Changes in version 2.1 beta 6 (5.11.2003)
-----------------------------------------
* added Session.cancelQuery()
* improvements to transaction handling for failed commit (thanks to Juergen Hoeller)
* added cascade="delete-orphan"
* fixed an exception that occurred when a property was declared not-null="true" update="false" (thanks to John Kristian)
* support multiple named query cache regions (Mikheil Kapanadze)
* some improvements to collection reattachment
* fixed a bad bug with adds to an uninitialized bag or list
* removed support for <dynabean/> components
* added <dynamic-component/> mapping for properties of type Map
* fixed a bug where schema export generated index names that were too long for DB2
* allow per-region expiry policies in OSCache (Matthias Bogaert)
* fixed a stack overflow that could occur while initializing nonlazy collections
* fixed a bug in case-insensitive like for Example queries
* fixed a bug in ScrollableResults.setRowNumber() (Martin Priekopa)
* improvements to the cache concurrency strategies

Changes in version 2.1 beta 5 (30.10.2003)
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* Support for custom CollectionPersister (Nick Johnson, Max Andersen)
* Support for named SQL queries (Max Andersen)
* duplicate named queries now throws MappingException instead of just logging warning (Max Andersen)
* fixed problems with WebSphereTransactionManagerLookup (Ralf Taugerbeck, Daniel Bradby)
* added support for custom collection persisters (thanks to Max Anderson, Nick Johnson)
* fixed a performance problem during query compilation (Bulent Erdemir)
* composite keys now supported in createSQLQuery() (Max Andersen)
* fixed JCA adaptor to run in WebLogic (Daniel Bradby)
* integrated SwarmCache (Jason Carreira)
* integrated OSCache (Matthias Bogaert)
* fixed an NPE that could occur with lists and orphan delete
* allow nullable one-to-one with property-ref
* improved usage of Dialect-specific limit SQL
* fixed problem where non-lazy collections held by cached objects were not immediately initialized
* fixed getReturnTypes() for native SQL queries (Max Andersen)
* fixed problems with Criterions that applied to multi-column properties
* check of rowcounts when JDBC batch updates enabled
* added named SQL queries using <sql-query> element (Max Andersen)
* added some extra validations so Hibernate fails earlier when user makes mistakes
* allow lazy="true" as an alternative to proxy="ClassName"
* removed dependency to commons-lang
* SchemaExport now creates indexes for collection foreign key columns if specified by Dialect
* fixed a bug parsing named parameters in setParameterList()
* select new Foo(...) will now tolerate null values if the constructor accepts a wrapper type
* fixed a problem detecting Proxool
* added logging of persistent object states during flush()
* allow "not null" as a discriminator value
* added "parameters" config param to "sequence" generator (Matthias Bogaert)

Changes in version 2.1 beta 4 (3.10.2003)
-----------------------------------------
* fixed a bug where <any> mappings did not handle proxies correctly
* implemented new optimistic-lock strategies
* fixed several bugs in Criteria query API
* fixed a bug caching property-ref associations
* improvements to XML Databinder (Ara Abrahamian)
* added Session.replicate() and ReplicationMode
* added ScrollableResults.setRowNumber() / ScrollableResults.getRowNumber()
* added query cache and Query.setCacheable()
* added Criteria.returnMaps()
* fixed some problems with CGLIB proxies
* fixed an NPE that occurred when a joined-subclass of a versioned entity defined only collections
* added the access attribute, direct field access and the PropertyAccessor extension point
* added MatchMode for use with Criteria queries (thanks to Michael Gloegl)
* fixed a bug where some lazy="false" collections were not immediately initialized
* fixed problem with WebSphere 5 TransactionManager
* support schema attribute in MySQL, by using an underscore in the table name (Chris Hane)
* now seperate Dialects for Interbase and Firebird (Reha Cenani, Max Andersen)
* removed built-in PreparedStatement cache
* added Session.getSessionFactory()
* fixed problem with native SQL queries and Query.setProperties() (Max Andersen)
* Query now fully validates parameters against the query string before passing them to JDBC (Max Andersen)
* fixed an NPE in SessionFactory.close()
* fixed an NPE that occurred when using <idbag>s
* added SQL-level query results paging to DB2Dialect
* "foreign" id generator now handles detached instances

Changes in version 2.1 beta 3 (7.9.2003)
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* added Example queries
* fixed an exception that occurred at startup with <key-many-to-one> and <joined-subclass>
* fixed a bug where composite-elements were not being updated if a property not in the equals() was changed
* <parent> property of a composite-element may now be used in equals()
* named parameters may now be used in HQL order by clause
* null value of version property now indicates unsaved instance
* added select-before-update attribute
* two-phase loading now use for components
* better implementation of equals()/hashCode() for proxies
* added property-ref attribute to <many-to-one>
* renamed result() to uniqueResult()
* added Session.get()
* added HashtableCacheProvider
* JTA TransactionManager now used even when not using Hibernate Transaction API
* always bypass process-level cache for LockMode.READ

Changes in version 2.1 beta 2 (27.8.2003)
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* <subclass> and <joined-subclass> may now appear outside of a <class> element, by providing the extends attribute (Max Andersen)
* fixed an NPE at startup that was introduced in beta 1
* fixed a bug in Map.putAll()
* new pluggable cache API
- deprecated <jcs-cache> in favor of <cache>
- net.sf.hibernate.cache.CacheProvider settable via hibernate.cache.provider_class
* more aggressive caching
* added Hibernate.close(Iterator)
* Criteria queries may now include joins
- Criteria.addJoin()
- Criteria.createCriteria()
* hibernate.transaction.manager_lookup_class should now ALWAYS be specified in JTA environment when using jcs caching
* fixed a bug caching <key-many-to-one>
* fixed bug where cached component did not get <parent> property populated
* added hibernate.max_fetch_depth property
* smarter outer-join fetching
* transient object may now be associated with session using Session.lock()
* added Query.result(), Criteria.result()

Changes in version 2.1 beta 1 (10.8.2003)
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* batch-size attribute for collection and class mappings, to allow batch loading
* collections of "value types" (including composite-elements) may now appear in HQL from clause
* more efficient loading of collections, and better handling of non-lazy collections
* added HQL index() function to allow access to collection element index
* added Session.createSQLQuery() (Max Andersen)
* added outer-join attribute to collection mappings
* Criteria.setFetchMode() now applies to collection-valued path expressions
* added property-ref attribute to <one-to-one>, enabling unique foreign key associations
* added hibernate.max_fetch_depth config property
* added hibernate.hbm2ddl.auto config property
* fixed a bug with combination of <jcs-cache> and <key-many-to-one>