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https://issues.apache.org/jira/browse/IGNITE-3422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15874371#comment-15874371
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Vladimir Ozerov commented on IGNITE-3422:
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[~daradurvs],
Is it correct that special constructor will be called only in case object
implements {{Binarylizable}} interface? This logic looks over-restricted to me,
because in order to properly initialize {{final}} fields user will have to
implement {{readBinary}} and {{writeBinary}} methods, what looks strange as you
will have to write two routines - constructor and {{writeBinary}}.
All in all, we have a kind of consistency problem here. In .NET custom write is
implemented as separate method, while read is implemented as special
constructor. In Java we follow {{Externalizable}} ideas where both read and
write happen in separate methods. If we add another constructor which also
perform reads, then we will split read logic between two methods - {{ctor}} and
{{readBinary}}. This looks overcomplicated to me. Moreover, this doesn't fit
well to {{BinarySerializer}} interface.
[~dmagda],
Do you really think we need this? Honestly, I've never see any serious demand
for this feature from user side.
> No way to control object initialization during deserialization/unmarshalling
> -----------------------------------------------------------------------------
>
> Key: IGNITE-3422
> URL: https://issues.apache.org/jira/browse/IGNITE-3422
> Project: Ignite
> Issue Type: Improvement
> Components: binary, general
> Affects Versions: 1.6
> Reporter: Denis Magda
> Assignee: Vyacheslav Daradur
>
> Presently there is no way to control instantiation of a {{BinaryObject}} that
> is being deserialized. The object is created using
> {{BinaryClassDescriptor#newInstance}} all the time.
> It makes sense to add {{BinaryConfiguration.setInitializationFactory()}}
> method that will provide with such support.
> Use case and details are provided in this discussion
> http://apache-ignite-users.70518.x6.nabble.com/Properly-Immutable-Keys-values-with-Binary-objects-tp6082.html
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