PI58114: ClassCastException when an equals comparison query is run on an entity with a composite @EmbeddedId

Fixes are available

APAR status

Closed as program error.

Error description

Customer is seeing following exception :

Caused by: java.lang.ClassCastException:
nl.belastingdienst.openjpa.
domein.SubjectKey incompatible with [Ljava.lang.Object;
 at
org.apache.openjpa.jdbc.kernel.exps.Param.appendTo(Param.java:14
9)
 at
org.apache.openjpa.jdbc.kernel.exps.EqualExpression.appendTo
(EqualExpression.java:73)
 at
org.apache.openjpa.jdbc.kernel.exps.CompareEqualExpression.appen
dTo
(CompareEqualExpression.java:108)
 at
org.apache.openjpa.jdbc.kernel.exps.SelectConstructor.buildWhere

(SelectConstructor.java:312)
 at
org.apache.openjpa.jdbc.kernel.exps.SelectConstructor.evaluate
(SelectConstructor.java:94)
 at
org.apache.openjpa.jdbc.kernel.JDBCStoreQuery.createWhereSelects

(JDBCStoreQuery.java:360)
 at org.apache.openjpa.jdbc.kernel.JDBCStoreQuery.executeQuery

Local fix

```
N/A
```

Problem summary

****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V8.0.0, V8.5.0, V8.5.5, and V9.0.0   *
*                  who make use of an @EmbeddedId in their     *
*                  JPA entity.                                 *
****************************************************************
* PROBLEM DESCRIPTION: ClassCastException occurs when an       *
*                      equals comparison query is executed     *
*                      on an entity with a composite           *
*                      @EmbeddedId.                            *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Take the following JPA entity:
@Entity
public class Subject implements Serializable {
@EmbeddedId
private SubjectKey key;
.......
Where SubjectKey class is as follows:
@Embeddable
public class SubjectKey implements Serializable {
private Integer subjectNummer;
private String subjectTypeCode;
......
As can be seen we have a composite primary key. With
this, take this query:
TypedQuery<Subject> query = em.createQuery("select s from
Subject s where s = :subject", Subject.class);
query.setParameter("subject", s);
Subject s2 = query.getSingleResult();
This query will yield the following exception:
java.lang.ClassCastException:
org.apache.openjpa.persistence.embed.compositepk.SubjectKey
cannot be cast to [Ljava.lang.Object;]
at
org.apache.openjpa.jdbc.kernel.exps.Param.appendTo(Param.java:14
9)
If a corresponding 'em.find' of Subject is run, this
exception doesn't occur. Furthermore, if the same
query is run for an entity with an @EmbeddedId that only
contains one field, all will work as expected. The issue here
is with an equals query where the entity contains an
@EmbeddableId with more than two fields.

Problem conclusion

With this fix, code has been added to OpenJPA to properly
handle the case where an equals comparision is performed on a
composite primary key.

The fix for this APAR is currently targeted for
inclusion in Service Levels (Fix Packs) 8.0.0.13, 8.5.5.11,
and 9.0.0.2 of WebSphere Application Server versions 8.0.0,
8.5.5 and 9.0.0.  It is also included in WebSphere Liberty
16.0.0.3.

Please refer to the recommended updates page for delivery
information:
http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980

Temporary fix

Comments

APAR Information

APAR number
PI58114
Reported component name
WEBSPHERE APP S
Reported component ID
5724J0800
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-02-25
Closed date
2016-07-14
Last modified date
2017-06-26

APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name
WEBSPHERE APP S
Fixed component ID
5724J0800

Applicable component levels

R800 PSY
UP
R850 PSY
UP
R900 PSY
UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.0","Line of Business":{"code":"LOB45","label":"Automation"}}]

Document Information

Modified date:
04 May 2022

Tips

PI58114: ClassCastException when an equals comparison query is run on an entity with a composite @EmbeddedId

Fixes are available

Subscribe

APAR status

Closed as program error.

Error description

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

APAR number

Reported component name

Reported component ID

Reported release

Status

PE

HIPER

Special Attention

Submitted date

Closed date

Last modified date

APAR is sysrouted FROM one or more of the following:

APAR is sysrouted TO one or more of the following:

Fix information

Fixed component name

Fixed component ID

Applicable component levels

R800 PSY

R850 PSY

R900 PSY

Document Information

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