Hibernate version: 3.6.0.Final
I just solved a very poorly handled and documented problem and figured someone else may benefit from the post.
I was experimenting with a formula to do a count:
Code:
@Formula("(SELECT count(*) FROM my_joined_table pl WHERE pl.parent_id=parent_id)")
private Number joinedCount;
And kept getting the exception:
Code:
org.hibernate.type.SerializationException: could not deserialize
at org.hibernate.util.SerializationHelper.doDeserialize(SerializationHelper.java:262)
at org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:306)
at org.hibernate.type.descriptor.java.SerializableTypeDescriptor.fromBytes(SerializableTypeDescriptor.java:130)
at org.hibernate.type.descriptor.java.SerializableTypeDescriptor.wrap(SerializableTypeDescriptor.java:116)
at org.hibernate.type.descriptor.java.SerializableTypeDescriptor.wrap(SerializableTypeDescriptor.java:39)
at org.hibernate.type.descriptor.sql.VarbinaryTypeDescriptor$2.doExtract(VarbinaryTypeDescriptor.java:62)
at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:64)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:253)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:249)
at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:229)
at org.hibernate.type.AbstractStandardBasicType.hydrate(AbstractStandardBasicType.java:330)
at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2265)
at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1527)
at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1455)
at org.hibernate.loader.Loader.getRow(Loader.java:1355)
at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:611)
at org.hibernate.loader.Loader.doQuery(Loader.java:829)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274)
at org.hibernate.loader.Loader.doList(Loader.java:2533)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2276)
at org.hibernate.loader.Loader.list(Loader.java:2271)
at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:119)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1716)
at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:347)
...
Caused by: java.io.EOFException
at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2298)
at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2767)
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:799)
at java.io.ObjectInputStream.<init>(ObjectInputStream.java:298)
at org.hibernate.util.SerializationHelper$CustomObjectInputStream.<init>(SerializationHelper.java:328)
at org.hibernate.util.SerializationHelper$CustomObjectInputStream.<init>(SerializationHelper.java:318)
at org.hibernate.util.SerializationHelper.doDeserialize(SerializationHelper.java:237)
... 51 more
Changing the type from Number to Long seemed to solve the issue:
Code:
@Formula("(SELECT count(*) FROM my_joined_table pl WHERE pl.parent_id=parent_id)")
private Long joinedCount;
p.
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