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https://issues.apache.org/jira/browse/POLYGENE-105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15897622#comment-15897622
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Paul Merlin commented on POLYGENE-105:
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Most of this is already fixed. There's no more "Value module finder" concept,
the deserialization api was changed to pass the module to use.
What is missing is changing the deserialization implementations so that they
use the looked up value type's module as a starting point when deserializing
nested values. BTW, JSONEntityState suffers from the same flaw.
I'm having a hard time coming up with a test case that fail with the actual
implementation.
[~niclas], I could use a hand here, any chance you could express this in
(pseudo) code?
If you want to actually write it in code, it should be doable on the develop
branch, I'll adapt it to my serialization-3 branch.
> ValueSerialization Type Lookup is wrong.
> ----------------------------------------
>
> Key: POLYGENE-105
> URL: https://issues.apache.org/jira/browse/POLYGENE-105
> Project: Polygene
> Issue Type: Sub-task
> Affects Versions: 2.0, 2.1
> Reporter: Niclas Hedhman
> Fix For: 3.0
>
>
> The ValueSerialization extensions are dependent on type lookup when
> deserializing values, but they go about it in the wrong way. They make the
> type lookup relative to their own Module, which completely breaks everything,
> and it can't even be worked around in many cases.
> Entities that has values in them, are not prone to this, since a slightly
> different approach is done in the entity store, although I am not sure it is
> immune to this Visibility/TypeLookup issue.
> There is even a "Values Module Finder" feature in the whole subsystem, which
> is a hack-ish work-around the short-comings of the actual API.
> At a minimum, a Module needs to be provided for which the Visibility should
> be computed from. It is likely that the Module used is dynamic, and changes
> as the Value Type tree is traversed, i.e. when a nested type is "found" its
> Module (i.e. the module it was found in) should be used for its further
> TypeLookup operations. This mimics the UnitOfWork to a much closer degree.
> The necessary model elements are present, and to correct the implementations
> shouldn't be too hard, but there will be a change in the ValueSerialization
> API/SPI, and we should simply delay the change until 3.0. There might be many
> over wanted changes that could affect the new design.
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