[beans] Make converters property aware
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Key: LABS-353
URL: https://issues.apache.org/jira/browse/LABS-353
Project: Labs
Issue Type: New Feature
Components: Magma
Affects Versions: Current
Reporter: Simone Gianni
Assignee: Simone Gianni
Fix For: Current
Converters were born to be unaware that they are working on a specific
property, and this is fine.
However, with LABS-351, now converters have a new role in the system, that is
not only to convert from one type to String, but also to convert it from some
intermediate "meta-types" to some generic final types, like byte[] or streams.
While the to-from String conversion can easily be handled without knowledge of
any other context, other conversions are not as simple.
Moreover, such converters could assolve another function, that is to "prepare"
the data as required by the user. For example, issue LABS-213 is about having
forbidden elements in a rich text HTML be removed from the HTML during the
conversion phase. Another example could be the image converter to resize images
to conform to requirements, or to convert them to different mime types than the
one uploaded by the user.
To do this, some converters requires access to the PropertyInfo object, where
validation and other informations are present.
As a rule however, converters must keep working when they are used not in the
context of a property.
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