Generating subclass in a single file, even super class source code is not
avaliable
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Key: XDP-210
URL: http://jira.codehaus.org/browse/XDP-210
Project: XDoclet 2 Plugins
Issue Type: New Feature
Components: hibernate
Environment: XDoclet2
Reporter: Alan She
Since Hibernate support putting subclass in a single mapping file, it should
better be supported in plugin-hibernate.
A typical use case is separating a system into several modules.
While developers of 'module B' do not need to see the code of 'module A' even B
depends A.
When it comes to generating the hbm files. 'Module B' don't have the source of
A, but it is
possible that some classes in B (e.g. Student) is a subclass of a class in
module A (e.g. Person). At this time, putting <subclass> tag in the hbm of
Person does not make sense (and impossible, because it don't have module A' s
source now).
It is obvisously that in this case we should use a single hbm file which define
the subclass Student and put this in module B.
Therefore, it is suggested that add a "extend" attribute for
@hibernate.subclass, @hibernate.joined-subclass and @hibernate.union-subclass,
and these tags are scaned for generating a hbm file if the "extend" attribute
is provided.
While the "extend" attribute is provided, no matter the super class source file
in or not in the fileset, a hbm file can be generated.
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