Hello; I asked this question before and got crickets.
What is the best way to customize a ReverseMappingTool run such that for
every table mapped I create a MappedSuperclass that it inherits from?
I am using OpenJPA 1.2.1 and generating annotations, not XML.
So if I have a database table named Person, then I want a
PersonMappedSuperclass.java and a Person.java class that inherits from it.
I am so close it is maddening, but cannot cross the final chasm.
The first thing I do is to set my ReverseCustomizer to change the incoming
ClassMapping to setEmbeddedOnly(true), and rename it to
xyzMappedSuperclass. Then I generate a new class, set the MappedSuperclass
as its parent, and install the new mapping directly into the repository,
like so (inside customize(ClassMapping)):
mapping.setEmbeddedOnly(true);
final Class<?> mappingClass = mapping.getDescribedType();
final String mappingClassName = mappingClass.getName();
final String newClassName = mappingClassName.substring(0,
mappingClassName.length() - "MappedSuperclass".length());
final Class<?> newClass = this.tool.generateClass(newClassName,
mappingClass);
final MappingRepository mappingRepository = this.tool.getRepository();
final ClassMapping newMapping =
(ClassMapping)mappingRepository.addMetaData(newClass);
newMapping.setPCSuperclass(mappingClass);
newMapping.setTable(mapping.getTable()); // ? maybe?
newMapping.setEmbeddedOnly(false);
This does more or less what I want: at the end of this run, I get a mapped
superclass and an entity class that extends from it. However, none of the
mapped superclass field information is filled in. That is, I get things
like:
@Basic
Instead of
@Basic
@Column(name="pmt_no", length=16)
Bug 1360 seems to be related to this (
http://issues.apache.org/jira/browse/OPENJPA-1360). It would appear that in
the 1.2.x line, anyhow, it is impossible to create a MappedSuperclass whose
field annotations are properly filled in, thus of course defeating the
entire purpose of a MappedSuperclass. I would be interested to learn if
ANYONE has ever generated MappedSuperclasses using this tool.
Best,
Laird
