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https://issues.apache.org/jira/browse/OPENJPA-1569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12844808#action_12844808
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Jerry Carter commented on OPENJPA-1569:
---------------------------------------
Chased this down into the code for a bit. In
SingleFieldManager.preFlush(FieldMetaData, int, int, int, boolean, boolean,
OpCallbacks), interfaces have a type of JavaTypes.PC_UNTYPED whereas classes
are JavaTypes.OBJECT. The decision logic for setting this value is not readily
apparent to the uninitiated.
> @Strategy triggers an InvalidStateException for fields which are declared as
> Java interfaces
> --------------------------------------------------------------------------------------------
>
> Key: OPENJPA-1569
> URL: https://issues.apache.org/jira/browse/OPENJPA-1569
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 2.0.0-beta2
> Environment: MacOS X, Spring 3.0, Maven
> Reporter: Jerry Carter
>
> The @Strategy annotation works fine for classes but does not work if the
> field is a Java interface. Consider:
> @Persistent
> @Strategy("SimpleHandler")
> @Column(name="address_packed")
> private BaseAddress address;
> public BaseAddress getAddress() { return address; }
> public void setAddress(BaseAddress address) { this.address = address; }
> This works perfectly if BaseAddress is defined as a class but results in an
> InvalidStateException if it is an interface:
> <openjpa-2.0.0-beta2-rexported fatal user error>
> org.apache.openjpa.persistence.InvalidStateException: Encountered unmanaged
> object in persistent field "com.example.SimpleEntity.address" during flush.
> However, this field does not allow cascade persist. Set the cascade attribute
> for this field to CascadeType.PERSIST or CascadeType.ALL (JPA annotations) or
> "persist" or "all" (JPA orm.xml), or enable cascade-persist globally, or
> manually persist the related field value prior to flushing. You cannot flush
> unmanaged objects or graphs that have persistent associations to unmanaged
> objects.
> FailedObject: com.example.usaddr...@4e0a39de
> at
> org.apache.openjpa.kernel.SingleFieldManager.preFlushPC(SingleFieldManager.java:767)
> at
> org.apache.openjpa.kernel.SingleFieldManager.preFlush(SingleFieldManager.java:614)
> at
> org.apache.openjpa.kernel.SingleFieldManager.preFlush(SingleFieldManager.java:575)
> at
> org.apache.openjpa.kernel.SingleFieldManager.preFlush(SingleFieldManager.java:491)
> at
> org.apache.openjpa.kernel.StateManagerImpl.preFlush(StateManagerImpl.java:2956)
> at org.apache.openjpa.kernel.PNewState.beforeFlush(PNewState.java:40)
> at
> org.apache.openjpa.kernel.StateManagerImpl.beforeFlush(StateManagerImpl.java:1048)
> at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:2051)
> at org.apache.openjpa.kernel.BrokerImpl.flushSafe(BrokerImpl.java:2011)
> at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:1782)
> at
> org.apache.openjpa.kernel.DelegatingBroker.flush(DelegatingBroker.java:1015)
> at
> org.apache.openjpa.persistence.EntityManagerImpl.flush(EntityManagerImpl.java:637)
> ... etc ...
> Here com.example.USAddress is a class which implements the BaseAddress
> interface.
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