[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-4257) map key type no longer inferred correctly, throws exception at runtime

[Strong Liu (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-4257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=35186#action_35186 ] 

Strong Liu commented on HHH-4257:
---------------------------------

https://jira.jboss.org/jira/browse/JBPAPP-3384

> map key type no longer inferred correctly, throws exception at runtime
> ----------------------------------------------------------------------
>
>                 Key: HHH-4257
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4257
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: annotations
>         Environment: hib. 3.2, annotaions 3.3.1GA, em 3.3.1GA, oracle 10r2, tomcat 5.5, linux, spring 2.0
>            Reporter: David Mansfield
>             Fix For: 3.5.0-Beta-3
>
>         Attachments: hib-anno-set-map-key-type.patch
>
>   Original Estimate: 15 minutes
>  Remaining Estimate: 15 minutes
>
> after upgrading from annotations 3.3.0GA to 3.3.1GA, my mapped collection (ManyToMany) is broken.  i've identified the commit that broke it:
> http://fisheye.jboss.com/browse/Hibernate/annotations/trunk/src/java/org/hibernate/cfg/annotations/MapBinder.java?r1=12963&r2=14425
> The issue is that unless the type is given now expliticly in the @MapKey's @Type, the code now assumes a 'Serializable' type, and attempts to deserialize an object stream from the database column value.  the exact exception is:
> java.io.StreamCorruptedException: invalid stream header
> 	at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
> 	at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
> 	at org.hibernate.util.SerializationHelper$CustomObjectInputStream.<init>(SerializationHelper.java:252)
> 	at org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:209)
> 	at org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:240)
> 	at org.hibernate.type.SerializableType.fromBytes(SerializableType.java:82)
> 	at org.hibernate.type.SerializableType.get(SerializableType.java:39)
> 	at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:163)
> ...
> The fix is simple: if @Type is NOT given in the @MapKey annotation, keep the old behavior which at least tries to set the type, even if it may not work in all situations.  The attached patch fixes the problem for me.
> In my particular situation, the map key type is a java.lang.Enum.  Here's what my annotated property looks like:
>    @ManyToMany
>     @JoinTable(
> 	name="chargeback_owner"
> 	,joinColumns=@JoinColumn(name="person_id",referencedColumnName="person_id")
> 	,inverseJoinColumns=@JoinColumn(name="owner_person_id")
>     )
>     @MapKey(columns=@Column(name="owner_type_cd"),targetElement=ChargebackOwnerType.class)
>     @Enumerated(EnumType.STRING)
>     @Sort(type=SortType.NATURAL)
>     private SortedMap<ChargebackOwnerType,Person> owners = new TreeMap<ChargebackOwnerType, Person>();

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira