[jira] [Closed] (IGNITE-1644) .Net: DateTime.Kind is lost during serialization

["Vladimir Ozerov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-1644?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vladimir Ozerov closed IGNITE-1644.
-----------------------------------

> .Net: DateTime.Kind is lost during serialization
> ------------------------------------------------
>
>                 Key: IGNITE-1644
>                 URL: https://issues.apache.org/jira/browse/IGNITE-1644
>             Project: Ignite
>          Issue Type: Bug
>          Components: interop
>    Affects Versions: 1.5
>            Reporter: Pavel  Tupitsyn
>            Assignee: Vladimir Ozerov
>             Fix For: 1.5
>
>
> Add the following test to PortableSelfTest.cs:
> {code}
> [Test]
> public void TestWriteDate()
> {
>     DateTime time = DateTime.Now;
>     DateTime timeUtc = DateTime.UtcNow;
>     Assert.AreEqual(_marsh.Unmarshal<DateTime>(_marsh.Marshal(time)), time);
>     Assert.AreEqual(_marsh.Unmarshal<DateTime>(_marsh.Marshal(timeUtc)), timeUtc);
> }
> {code}
> Observe that it fails becuase we loose DateTimeKind. 
> This happens because we always write DateTime as UTC and lose DateTime.Kind, so on deserialization we do not know whether ToLocal should be called.
> DateTime must be serialized in portable form only in two cases:
> 1) IPortableWriter.WriteDate()
> 2) IPortableWriter.WriteDateArray()
> In these cases we should throw exception on a non-UTC date.
> In all other cases it should be serialized in some other form. E.g., we can introduce new wrapper type ".NET-specific" and wrap DateTime, Collections, Arrays (IGNITE-1779) in it.
> This will break queries to some extent.



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