changelog.txt

人力资源管理系统 系统把几乎所有与人力资源相关的数据统一管理

* query language identifiers now case sensitive (bugfix for case sensitive SQL dialects)
* username/password now optional for datasource (contributed by Emmanuel Bourg)
* much improved API documentation
* binary types now saved using streams if hibernate.use_streams_for_binary=true (contributed by Jon Lipsky)
* MySQL Strings now mapped to TEXT columns if length > 255 (contributed by Christoph Beck)

Changes in version 0.9.14 (4.6.2002)
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* lifecycle objects - properties now have a cascade attribute to cascade save, update, delete
* composite id properties may now be used in queries eg. foo.id.bar (contributed by Jon Lipsky)
* slightly changed semantics of update() so it now also save()s new transient instances
* Session now flushes() itself less often before query execution (performance enhancement)
* fixed problem where Session.save() returned null instead of the natively generated id
* fixed bug with object identity for cached classes
* fixed bug where delete(x) could not be called after update(x)
* MUCH improved Exception hierarchy
* deprecated create()
* added sql-type attribute to <column> tag to allow user to override default type mapping
* deeper fetching with use_outer_join
* new ConnectionProvider framework
* fixed a bug where blocking cache could return stale data
* now working again in JDK1.2.2
* fixed problem with not-null associations + native key generation
* minor changes to PersistentLifecycle interface
* initial, minimal version of new Transaction mechanism
* MUCH improved documentation

Changes in version 0.9.13 (25.5.2002)
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* Datastore.storeResource() to load mapping files from classpath
* fixed a problem executing under JDK1.3 when compiled from JDK1.4
* documentation improvements

Changes in version 0.9.12 (24.5.2002)
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* Session.update() methods to update a persistent instance from transient copy (as requested by many users)
* discriminator column name, type, length, etc now configurable by <discriminator> tag in mapping file
* discriminator column values configurable by discriminator-value attribute of <class> and <subclass> tags
* added Session.insert(object, id) for classes with no identifier property
* fixed another bad bug with connection handling (fix by Anton van Straaten)
* fixed a problem with deferred loading
* fixed a problem with sorted collections (fix by Anton van Straaten)
* nested collections of objects now require 2 SQL SELECTs to load, rather than size+1
* session is NO LONGER atomic - application should discard session when exception occurs
* fixed problem where character type was mapped to VARCHAR column
* arrays of proxies now possible by using new element-class attribute of <array> tag
* fixed various problems with proxies
* added proxy generation tool
* proxy unit tests
* replaced two RuntimeExceptions with checked exceptions
* made hibernate.username/hibernate.password optional for DriverManager
* CodeGenerator now supports all hibernate basic types
* much improved caching algorithm for compiled queries
* may now specify properties simply by placing hibernate.properties in classpath
* documentation improvements + fixes
* --abstract switch to MapGenerator (contributed by Eric Everman)

Changes in version 0.9.11 (12.5.2002)
------------------------------------
* fixed major bug with connection handling (fix by Anton van Straaten)

Changes in version 0.9.10 (11.5.2002)
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* set a default schema name using SessionFactory property hibernate.default_schema
* code generator tool contributed by Brad Clow (www.workingmouse.com)
* lazy object initialization under JDK 1.3 and above
* fixed some error messages to go to logging framework, not stdout
* new system property hibernate.show_sql=true logs all executed SQL to stdout
* integration of bugfixes in c3p0
* wrap IllegalArgumentExceptions in HibernateExceptions
* added ObjectNotFoundException and StaleObjectStateException
* fixed a bug when using schemas
* new caching strategy (and documented cache feature)

Changes in version 0.9.9 (25.4.2002)
-----------------------------------
* sorted sets and maps (thanks to Doug Currie)
* mapping files may now be loaded using getResourceAsStream() (thanks to Markus Meissner)
* hibernate messages now logged by Apache commons-logging
* default hi/lo generator table now has column named "next_id", instead of "next"
* query language may now refer to identifier property name (eg. foo.fooKey as alternative to foo.id)
* hibernate.jndi_class, hibernate.jndi_url now optional when using datasource
* hibernate now throws an exception if you try to persist an object with a reference to a transient object
* improved connection pooling algorithm (hibernate.pool_size limits pooled conections)
* very experimental integration of c3p0 JDBC connection pool (http://sourceforge.net/projects/c3p0)
* now compiles under JDK 1.2.2
* fixed bug persisting null components
* fixed bug where cached prepared statements were not cleaned up after disconnect() session
* fixed a null pointer exception in MappingByReflection

Changes in version 0.9.8 (13.3.2002)
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* supports database native key generation in Sybase, MS SQL, MySQL, DB2, Hypersonic (contributed by Christoph Sturm)
* supports Mckoi (dialect contributed by Doug Currie)
* supports Progress (dialect contributed by Phillip Baird)
* added exceptions to catch Session reentrancy from PersistentLifecycle.load() + store()
* experimental cross-transaction cache
* Session.lock() and Session.loadWithLock() for pessimistic locking
* HiLoGenerators may now use their own DriverManager connection properties + may now use same table across diff mapping files
* Session.flush(), Session.close() and Session.connection() replace Session.commit(), Session.cancel()
* Session.disconnect() and Session.reconnect() for long transactions
* added single JVM id generators vm.long, vm.hex
* added unique column constraints to mappings
* extensions to IDGenerator framework
* support sequence-style ID generation in Oracle, PostgreSQL, DB2, Interbase

* fixed problem where subcollections of a collection that changed roles would be deleted
* changed class loading strategy to be compatible with JBoss
* stopped queries retrieving unnecessary columns
* mutable types (binary + serializable) now always detected as dirty

Changes in version 0.9.7 (26.2.2002)
-----------------------------------
* save() now safe from foreign key violations (so create() is no longer preferred method of adding data)
* delete() now completely safe from foreign key violations - it no longer matters what order objects are deleted in
* removed Session.copy()
* hilo generators now NOT for use with application server datasources

* fixed two intermittent bugs in queries
* fixed a problem where components not detected as dirty
* fixed broken hilo generator which was not updating database
* fixed a minor bug when hibernate.use_outer_join was set

Changes in version 0.9.6 (24.2.2002)
-----------------------------------
* experimental XML generation
* added support for bi-directional associations (one-to-set, set-to-set) with <set readonly="true"> config
* reflective generation of mappings tool was contributed by Doug Currie
* Session operations now atomic, so exceptions are recoverable
* made ID properties optional in persistent classes
* support for multiple schemas through schema attribute of <hibernate-mapping>, <class>, <set>, <map>, etc.
* auto-creation of tables for hilo id generators (restriction: cannot use same table from more than one mapping file)
* added some more assertions to catch user "mistakes" like deleting transient or saving persistent objects

* major rework of collections and fixed some bad bugs
* lazy initialization re-enabled for one-to-many associations (thanks to Georg Schneemayer)
* fixed a problem in the mapping DTD to allow nested components in collections
* fixed a BAD bug in RelationalDatabaseSession when loading objects with PersistentLifecycle callbacks (thanks to Paul Szego)
* fixed problems with quoted strings in query language
* fixed a bug where a stack overflow occurred instead of HibernateException thrown (thanks to Georg Schneemayer)
* fixed a bug deleting updated versioned data
* fixed some problems with name generation for indexes + foreign keys
* fixed problem in Sun JDK 1.4 (only?) where IllegalArgumentException was not handled
* minor improvements to handling of dates and times
* HiLoGenerator now safe for all transaction isolation levels + safe when rollback occurs
* noticed and fixed obscure piece of nonthreadsafe code outside of core persistence engine
* removed unnecessary drop constraints for some dialects

* MUCH more comprehensive test suite

* changed some terminology used in documentation
* added javadoc for API classes
* commented the mapping DTD

Changes in version 0.9.5 (8.2.2002)
-----------------------------------
* supports HypersonicSQL (dialect contributed by Phillip Baird)
* supports Microsoft SQL server (with third party JDBC driver)
* proper command-line tool for schema generation and export
* deprecated the interface cirrus.hibernate.Persistent (due to popular demand)
* changes to hibernate-mapping DTD (required to support optional Persistent interface):
- deprecated <property type="package.PersistentClassName"/> in favor of <many-to-one class="package.PersistentClassName"/>
- deprecated <element type="package.PersistentClassName"/> in favor of <many-to-many class="package.PersistentClassName"/>
- deprecated <property role="..."/> in favor of <collection role="..."/>
- deprecated <element role=".."/> in favor of <subcollection role="..."/>
- deprecated <association> in favor of <one-to-many>
* class attribute optional in <component> and <composite-id> tags (determined by reflection)
* querying components of components now supported
* one-shot table creation (no use of unportable "alter table")
* time dataype support
* reflective mappings of java.sql.Time, java.sql.Timestamp, java.sql.Date
* fixed error msg thrown when class is missing a method but has a superclass
* property names now conform to JavaBean spec ("foo" instead of "Foo"). Note that "Foo" still works
* constructors of persistent classes may now be non-public
* collection indexes now mapped to not-null columns
* fixed obscure bug with querying collections inside components of components
* fixed potential bug related to cacheing of compiled queries
* major rewrite of code relating to O-R mappings
* Session.copy() and Session.equals() as convenience for users
* fixed repeated invocations of hasNext() on iterator + iterators now always work with distinct SQL resultsets
* McKoi dialect was contributed by Gabe Hicks

Changes in version 0.9.4 (29.1.2002)
------------------------------------
* fixed BAD bug where XML parsing would not work for parsers other than Xerces - thanks to Christian Winkler
* added some more assertions to catch user "mistakes" like changing ids or reusing existing ids

Changes in version 0.9.3 (27.1.2002)
------------------------------------
* repackaged (corrupted DatasourceConnectionProvider.class)
* better exception reporting using datasource
* added Datastore.storeClass() which looks for mapping file in classpath (class foo.Bar -> foo/Bar.hbm.xml)
* improved documentation

Changes in version 0.9.2 (25.1.2002)
------------------------------------
* iterate over query results (lazy instantiation of query results)
* added "select foo, bar" style queries returning multiple objects per row
* delete by query
* composite key support
* outer joins for faster (?) loading of associated objects ( set "hibernate.use_outer_join" to "true" )
* connection pooling when using DriverManager
* foreign key constraint from unkeyed collection table to owner entity table
* improved drop tables script execution (still not infallible)
* added <composite-element> tag
* added not-null properties and elements
* added an optimisation for dates and components
* made some XML attributes optional
* fixed errors in documentation + documented some extra features
* bugfix: store() not getting called on lifecycle interface
* bugfix: schema generation for indexed associations
* added many tests

Changes in version 0.9.1 (20.1.2002)
------------------------------------
Too many to list

version 0.8.1
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Initial alpha version