Hello,
I'm reviving this as @MapKeyEnumerated has been introduced recently which
seemed addressing this issue.
Unfortunately, if I use enum as a key where Source is amended with following
annotation for the map:
@OneToMany(mappedBy = "source",cascade={ CascadeType.ALL },fetch =
FetchType.LAZY, orphanRemoval = true)
@MapKeyEnumerated(EnumType.ORDINAL)
@MapKey(name = "tsType")
objects are committed gracefully and generated data and schema looks ok, but
the exception reappears during retrieval:
java.lang.ClassCastException: TSType cannot be cast to
org.apache.openjpa.util.ObjectId
gaia.cu7.omimpl.ClassificationResultsImpl.pcCopyKeyFieldsToObjectId(ClassificationResultsImpl.java)
org.apache.openjpa.enhance.PCRegistry.copyKeyFieldsToObjectId(PCRegistry.java:172)
org.apache.openjpa.util.ApplicationIds.fromPKValues(ApplicationIds.java:219)
org.apache.openjpa.jdbc.meta.ClassMapping.getObjectId(ClassMapping.java:216)
org.apache.openjpa.jdbc.meta.ClassMapping.getObjectId(ClassMapping.java:147)
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:934)
org.apache.openjpa.jdbc.sql.AbstractResult.load(AbstractResult.java:280)
org.apache.openjpa.jdbc.sql.SelectImpl$SelectResult.load(SelectImpl.java:2349)
org.apache.openjpa.jdbc.meta.strats.RelationToManyInverseKeyFieldStrategy.loadElement(RelationToManyInverseKeyFieldStrategy.java:87)
org.apache.openjpa.jdbc.meta.strats.StoreCollectionFieldStrategy.load(StoreCollectionFieldStrategy.java:554)
org.apache.openjpa.jdbc.meta.FieldMapping.load(FieldMapping.java:919)
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.load(JDBCStoreManager.java:641)
org.apache.openjpa.kernel.DelegatingStoreManager.load(DelegatingStoreManager.java:116)
org.apache.openjpa.kernel.ROPStoreManager.load(ROPStoreManager.java:78)
org.apache.openjpa.kernel.StateManagerImpl.loadFields(StateManagerImpl.java:3035)
org.apache.openjpa.kernel.StateManagerImpl.loadField(StateManagerImpl.java:3113)
org.apache.openjpa.kernel.StateManagerImpl.beforeAccessField(StateManagerImpl.java:1606)
org.apache.openjpa.kernel.StateManagerImpl.accessingField(StateManagerImpl.java:1591)
Source.pcGetclassificationResultsMap(SourceImpl.java)
2.0.0 trunk version.
Is is possible to use enumeration as a Key in a directly mapped (no join
table), bidirectional Map? Anybody with a workaround?
Best regards,
Krzysztof
Krzysztof wrote:
>
> Indeed, changing the map to be keyed on a plain type does not solve the
> problem until the owning 'source' field becomes plain type too.
> So,
>
> <Source>
> ...
> @OneToMany(mappedBy="source",cascade=CascadeType.ALL)
> @MapKey(name="tsType")
>
> private Map<Integer, TSImpl> tsMap;
> ...
> </Source>
> <TSimpl>
> @Id
> @Basic(optional=false)
> @Enumerated(EnumType.ORDINAL)
> @Column(name="tsType",updatable=false)
> private TSType tsType; //stays as enum, same exception thrown
> </TSImpl>
> gives exactly same cast exception, but if we change this part of Id to int
> it works. Also calling persist on root persists map elements properly.
> @Id
> @Basic(optional=false)
> // @Enumerated(EnumType.ORDINAL)
> @Column(name="tsType",updatable=false)
> // private TSType tsType;
> private int tsType;
>
> This is not really elegant and affects a lot of code. Could you please
> suggest any workaround so enum could be used as a key and is compatible
> with ObjectId? Annotating enum as Embeddable gives enhancer error and
> creating class wrapping an enum is also questionable in this particular
> case.
>
> Best regards,
> Krzysztof
>
>
>
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