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From "Francesco Berardi (Jira)" <j...@apache.org>
Subject [jira] [Commented] (LUCENENET-602) Error using Lucene.Net.Facet 4.8.0-beta00005 with Xamarin.iOS
Date Thu, 30 Jan 2020 16:54:00 GMT

    [ https://issues.apache.org/jira/browse/LUCENENET-602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17026813#comment-17026813
] 

Francesco Berardi commented on LUCENENET-602:
---------------------------------------------

Hi Shad,

I create a new Xamarin.iOS project,  imported [J2N 2.0.0-beta-0001|https://www.nuget.org/packages/J2N/2.0.0-beta-0001] and
tested this code:
{code:java}
var linkedDictionary = new LinkedDictionary<int, string>();
for (int i = 0 ; i < 100; i++) {
 linkedDictionary.Add(i, i.ToString());
}
foreach(var entry in linkedDictionary) {
 Console.WriteLine($"Key: {entry.Key.ToString()} - Value: {entry.Value}");
}
foreach(var entry in linkedDictionary.Keys) {
 Console.WriteLine($"Key: {entry.ToString()}");
}
foreach(var entry in linkedDictionary.Values) {
 Console.WriteLine($"Value: {entry}");
}
using(var enumerator = linkedDictionary.GetEnumerator()) {
 while(enumerator.MoveNext()) {
 var current = enumerator.Current;
 Console.WriteLine($"Key: {current.Key.ToString()} - Value: {current.Value}");
 }
}{code}
   It works without problems. Let me know if it is enough or you need more tests.

> 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: Minor
>              Labels: AOT, Xamarin.iOS, lucene.net.facet
>             Fix For: Lucene.Net 4.8.0
>
>         Attachments: AppTestLucene.zip, image-2019-08-08-02-26-40-582.png
>
>   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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