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https://issues.apache.org/jira/browse/OPENJPA-2083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13159685#comment-13159685
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Kevin Sutter commented on OPENJPA-2083:
---------------------------------------
FYI, the OpenJPA manual documents slightly different behavior:
"2.14. Persistent Field Defaults
In the absence of any of the annotations above, JPA defines the following
default behavior for declared fields:
o Fields declared static, transient, or final default to non-persistent.
o Fields of any primitive type, primitive wrapper type, java.lang.String,
byte[], Byte[], char[], Character[], java.math.BigDecimal,
java.math.BigInteger, java.util.Date, java.util.Calendar, java.sql.Date,
java.sql.Timestamp, or any Serializable type default to persistent, as if
annotated with @Basic.
o Fields of an embeddable type default to persistent, as if annotated with
@Embedded.
o All other fields default to non-persistent.
Note that according to these defaults, all relations between entities must be
annotated explicitly. Without an annotation, a relation field will default to
serialized storage if the related entity type is serializable, or will default
to being non-persistent if not."
At least this explains the OpenJPA behavior. But, now we have to resolve this
behavior against the JPA spec-defined behavior...
> Unmapped fields silently treated as transient
> ---------------------------------------------
>
> Key: OPENJPA-2083
> URL: https://issues.apache.org/jira/browse/OPENJPA-2083
> Project: OpenJPA
> Issue Type: Bug
> Components: jpa
> Affects Versions: 2.1.1
> Reporter: Harald Wellmann
> Priority: Minor
>
> The JPA 2.0 spec requires any non-static non-transient entity field to be
> persistent unless explicitly mapped as transient by a @Transient annotation
> or the equivalent XML.
> OpenJPA 2.1.1 silently treats some unmapped non-primitive fields as transient
> instead of throwing an exception or at least logging a warning.
> Example:
> @Entity
> public class City {
> @Id
> private String name;
> private Integer population;
> private java.util.concurrent.Executor executor;
> // getters and setters
> }
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