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From "Axel Borge (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENENET-602) Error using Lucene.Net.Facet 4.8.0-beta00005 with Xamarin.iOS
Date Thu, 08 Aug 2019 00:10:00 GMT

    [ https://issues.apache.org/jira/browse/LUCENENET-602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16902555#comment-16902555
] 

Axel Borge commented on LUCENENET-602:
--------------------------------------

I must admit, I only did a quick and dirty hack to verify that the problem was in the LurchTable
implementation. I have not carefully chosen an alternative, and I'm surly not technically
competent to properly compare the different implementations out there, against the features
needed in this project.

With your knowledge of the necessary features, I has hoping you could find a propper alternative,
that hopefully could support the correct frameworks. There seems to be a few candidates according
to Google: [lrucache c#|https://www.google.com/search?client=safari&rls=en&ei=5mZLXaeJCuGErwSI-pf4AQ&q=lrucache+c%23&oq=lrucache+c%23&gs_l=psy-ab.3..0i203j0i22i30j0i8i13i30l3j0i13i5i30.21758.24036..24957...0.0..0.66.376.6......0....1..gws-wiz.......35i39j0i22i10i30j0i22i30i19j0i13i30i19j0i13j0i13i30j0i13i10i30.k5ImsuUmSJk&ved=&uact=5] 
If you find one you think looks OK, I'm happy to try it on a few physical IOS gadgets.

And, no. I haven't  verified that all of the Facet tests pass...

> Error using Lucene.Net.Facet 4.8.0-beta00005  with Xamarin.iOS
> --------------------------------------------------------------
>
>                 Key: LUCENENET-602
>                 URL: https://issues.apache.org/jira/browse/LUCENENET-602
>             Project: Lucene.Net
>          Issue Type: Bug
>          Components: Lucene.Net.Facet
>    Affects Versions: Lucene.Net 4.8.0
>         Environment: Xamarin Forms 3.0.0.561731
> Ios 10.3.3 and Higher
> Lucene.Net.Facet 4.8.0-beta00005
>            Reporter: Enrico Caltran
>            Priority: Blocker
>              Labels: AOT, Xamarin.iOS, lucene.net.facet
>             Fix For: Lucene.Net 4.8.0
>
>         Attachments: AppTestLucene.zip
>
>   Original Estimate: 120h
>  Remaining Estimate: 120h
>
> I'm using Lucene.Net.Facet 4.8.0-beta00005 in a big Xamarin project.
> +With Xamarin.Android and Xamarin.UWP it's all right.+
> *+But With Xamarin.iOS on device (Ipad)+*, i'm receiving this error:
>  _Attempting to JIT compile method 'Lucene.Net.Support.LurchTable2&lt;Lucene.Net.Facet.Taxonomy.FacetLabel,
Lucene.Net.Facet.Taxonomy.Directory.DirectoryTaxonomyReader/Int32Class&gt;:InternalInsert&lt;Lucene.Net.Support.LurchTable2/Add2Info<Lucene.Net.Facet.Taxonomy.FacetLabel,
Lucene.Net.Facet.Taxonomy.Directory.DirectoryTaxonomyReader/Int32Class>> (int,Lucene.Net.Facet.Taxonomy.FacetLabel,int&,Lucene.Net.Support.LurchTable`2/Add2Info<Lucene.Net.Facet.Taxonomy.FacetLabel,
Lucene.Net.Facet.Taxonomy.Directory.DirectoryTaxonomyReader/Int32Class>&)' while running
in aot-only mode. See [https://developer.xamarin.com/guides/ios/advanced_topics/limitations/]
for more information._
> _{color:#d04437}at Lucene.Net.Support.LurchTable2[TKey,TValue].Insert[T] (TKey key, T&amp;
value) &lt;0x2570f48 + 0x000e0&gt; in &lt;063e095c95d945a4ace32ab83d1227eb#2ae0fea9ea4eacaef83bf2e9713bb8ea&gt;:0
at (wrapper unknown) System.Object.gsharedvt_in() at Lucene.Net.Support.LurchTable2[TKey,TValue].AddOrUpdate
(TKey key, TValue addValue, Lucene.Net.Support.KeyValueUpdate2[TKey,TValue] fnUpdate) &lt;0x232824c
+ 0x0013b&gt; in &lt;063e095c95d945a4ace32ab83d1227eb#2ae0fea9ea4eacaef83bf2e9713bb8ea&gt;:0
at Lucene.Net.Facet.Taxonomy.LRUHashMap2[TKey,TValue].Put (TKey key, TValue value) <0x2c487f8
+ 0x0015b> in <79d3a7b905954d0993025c09c5d087ce#2ae0fea9ea4eacaef83bf2e9713bb8ea>:0
at Lucene.Net.Facet.Taxonomy.Directory.DirectoryTaxonomyReader.GetOrdinal (Lucene.Net.Facet.Taxonomy.FacetLabel
cp) <0x2c51970 + 0x0019b> in <79d3a7b905954d0993025c09c5d087ce#2ae0fea9ea4eacaef83bf2e9713bb8ea>:0
at Lucene.Net.Facet.Taxonomy.Int32TaxonomyFacets.GetTopChildren{color} (System.Int32 topN,
System.String dim, System.String[] path) <0x2c481dc + 0x0008f> in <79d3a7b905954d0993025c09c5d087ce#2ae0fea9ea4eacaef83bf2e9713bb8ea>:0
at Login.MyMB.Lucene.Client.LuceneArticoliSearcher.GetListaArticoloXRicercaAvanzataConRicercaSemplice
(System.Collections.Generic.List1[T] listParametri) &lt;0x224add0 + 0x001bb&gt; in
&lt;8f49891e0f0546e185aba7424d294ef7#2ae0fea9ea4eacaef83bf2e9713bb8ea&gt;:0 at Login.MyMB.Lucene.Client.LuceneArticoliSearcher.GetListaArticoloConRicercaSemplice
(System.Collections.Generic.List1[T] listParametri) <0x224afbc + 0x0009f> in <8f49891e0f0546e185aba7424d294ef7#2ae0fea9ea4eacaef83bf2e9713bb8ea>:0
at MyMB.Forms.RicercaLucene.RicercaArticoloLucene.GetListaArticoliXRicercaSemplice (Login.MyMB.Interface.IAmbiente
ambiente, Login.MyMB.Lucene.Client.LuceneArticoliSearcher las, System.Collections.Generic.List`1[T]
ListParametri, System.Boolean isAbilitataRicercaBarcode) <0xe47fc0 + 0x000e7> in <f1bb3149abe145459612794f1a096634#2ae0fea9ea4eacaef83bf2e9713bb8ea>:0
..............................._
> At the link [https://docs.microsoft.com/it-it/xamarin/ios/internals/limitations] , I
found the problem cause (I suppose...):
> _Value types as Dictionary Keys Using a value type as a Dictionary<TKey, TValue>
key is problematic, as the default Dictionary constructor attempts to use EqualityComparer<TKey>.Default.
EqualityComparer<TKey>.Default, in turn, attempts to use Reflection to instantiate a
new type which implements the IEqualityComparer<TKey> interface. This works for reference
types (as the reflection+create a new type step is skipped), but for value types it crashes
and burns rather quickly once you attempt to use it on the device. Workaround: Manually implement
the IEqualityComparer<TKey> interface in a new type and provide an instance of that
type to the Dictionary<TKey, TValue> (IEqualityComparer<TKey>) constructor._
> So, what can I do? Thank you in advance, Enrico Caltran +393357485560 [enrico.caltran@timegroup.it|mailto:enrico.caltran@timegroup.it]



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