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Hibernate 3 -

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maximkr

Post subject: Hibernate 3 -

Posted: Mon Mar 28, 2005 7:22 am

Newbie

Joined: Tue Nov 04, 2003 7:00 am
Posts: 1

After upgrade from Hibernate 2.1.8 to 3.0 rc1 got the following exception:

Code:

java.lang.UnsupportedOperationException: cannot perform lookups on timestamps
   at org.hibernate.type.TimestampType.getHashCode(TimestampType.java:99)
   at org.hibernate.cache.QueryKey.hashCode(QueryKey.java:76)
   at java.util.HashMap.hash(HashMap.java:261)
   at java.util.HashMap.containsKey(HashMap.java:339)
   at org.apache.commons.collections.SequencedHashMap.containsKey(Unknown Source)
   at org.apache.commons.collections.LRUMap.get(Unknown Source)
   at java.util.Collections$SynchronizedMap.get(Collections.java:1942)
   at net.sf.swarmcache.LRUCache.get(LRUCache.java:119)
   at net.sf.swarmcache.HybridCache.get(HybridCache.java:73)
   at net.sf.swarmcache.MultiCache.get(MultiCache.java:72)
   at gran.tools.cache.QueryCachedSwarmCache.get(QueryCachedSwarmCache.java:33)
   at org.hibernate.cache.StandardQueryCache.get(StandardQueryCache.java:74)
   at org.hibernate.loader.Loader.list(Loader.java:1454)
   at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:111)
   at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1246)
   at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:299)
   at gran.app.filter.PreFilter.addResult(PreFilter.java:294)

Database: HSQL 1.7.2

It seems like it cannot execute the following code:
cr.add(Expression.le(column, new Timestamp(now.getTimeInMillis())));

As mentioned before, this works in 2.1.x

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imario

Post subject:

Posted: Mon Mar 28, 2005 9:29 am

Regular

Joined: Thu Dec 11, 2003 4:14 pm
Posts: 86
Location: Hibernate 3 + annotations, Oracle 9i, PostgreSQL 8.0, Java 1.5.0

One side-effect of this change is it isnt possible to cache criterias using a timestamp-expression

see: http://forum.hibernate.org/viewtopic.php?t=938289

If possible define of the hibernate types listed here:
http://www.hibernate.org/hib_docs/v3/reference/en/html/mapping.html#mapping-types-basictypes

The only one which is able to handle date AND time beside timestamp is calendar an then you have to use the java-Calendar instead of Date.

Maybe you might have more luck if you create your own UserType.

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