[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3181) Legacy databases: Advanced handling of missing foreign key values

[Heinz Huber (JIRA)]

Legacy databases: Advanced handling of missing foreign key values
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                 Key: HHH-3181
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3181
             Project: Hibernate3
          Issue Type: New Feature
    Affects Versions: 3.2.6
         Environment: Hibernate 3.2.6
Oracle 10i (irrelevant)
            Reporter: Heinz Huber
         Attachments: not-found-keep.zip

"keep" as valid value for attribute not-found of many-to-one/many.
Effect: If the referenced object can't be found, a dummy object with the given key is constructed.
Example: Account.currency contains the value XYZ. This currency can't be found in the corresponding code table. After loading the account contains a currency object XYZ nontheless.

Extent:
src/org/hibernate/hibernate-mapping-3.0.dtd
src/org/hibernate/cfg/HbmBinder.java
src/org/hibernate/engine/ForeignKeys.java
src/org/hibernate/mapping/ManyToOne.java
src/org/hibernate/mapping/OneToMany.java
src/org/hibernate/type/EntityType.java
src/org/hibernate/type/ManyToOneType.java
src/org/hibernate/type/OneToOneType.java
src/org/hibernate/type/TypeFactory.java


There are some TODOs left:
- The handling of proxies should be improved.
- Currently works only per target entity (see comment in test).
But it works for 

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