Patch: pluggable annotation support for stripes
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Key: STS-316
URL: http://mc4j.org/jira/browse/STS-316
Project: Stripes
Issue Type: New Feature
Components: Validation
Reporter: Ignacio Coloma
Assigned To: Tim Fennell
This is an attempt to give support for JPA annotations from inside Stripes.
Enclosed is a patch that does the following:
1.- Convert the annotation mechanism of stripes to be pluggable, and therefore
not limited to @Validate and @ValidateNestedProperties. In the line of
scratching my itch, I have implemented a @ValidateNestedJpaProperties (I know
the name sucks).
2.- There is an AnnotationConverter interface that translates any kind of
annotation to the internal Stripes representation (ValidationMetadata). For
example, the tag above will seek the nested attributes and convert standard JPA
annotations (required, length, etc) into stripes internal representation.
3.- These annotation converters are stackable, but I still have to figure the
desired behaviour. The idea is to allow this kind of situation:
@ValidateNestedJpaProperties
@ValidateNestedProperties(<fine tuning here>)
private PersistentObject instance;
Where the second annotation would override the first one(for example, changing
length or required of certain attributes). It is more or less implemented, but
I still don't have a very clear idea of the expected behaviour.
If this works, annotations would be pluggable: you can give support to
Hibernate Annotations, JPA annotations, webwork annotations, all inside stripes
and override certain parts.
Caveats: configuration is not finished (only provided a default config with
Validate and ValidateNestedProperties annotations) and haven't checked fully if
something broke. Some more tests should be implemented, but they are easy.
Anyways, I wanted to submit this to get some feedback (this is only a proposal
that might not be accepted). The big size is because I need an ejb3 jar file to
be able to test annotation support.
Tim, your code is great!! Amazingly easy to understand.
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