Use DecoderFallback.ExceptionFallback to match Java's CodingErrorAction.REPORT, #1076

.gitignore

@@ -65,4 +65,5 @@ websites/apidocs/api/**/*.manifest
 svn-*/
 
 # vscode files
-.vscode/
+.vscode/
+.idea/**/misc.xml

Directory.Build.targets

@@ -37,6 +37,13 @@
 
   </PropertyGroup>
 
+  <!-- Features in .NET 8.x and .NET 9.x only -->
+  <PropertyGroup Condition=" $(TargetFramework.StartsWith('net8.')) Or $(TargetFramework.StartsWith('net9.')) ">
+
+    <DefineConstants>$(DefineConstants);FEATURE_UTF8_TOUTF16</DefineConstants>
+
+  </PropertyGroup>
+
   <!-- Features in .NET 6.x, .NET 7.x, .NET 8.x, and .NET 9.x only -->
   <PropertyGroup Condition=" $(TargetFramework.StartsWith('net6.')) Or $(TargetFramework.StartsWith('net7.')) Or $(TargetFramework.StartsWith('net8.')) Or $(TargetFramework.StartsWith('net9.')) ">
 

src/Lucene.Net.Analysis.Common/Analysis/Hunspell/Dictionary.cs

@@ -746,7 +746,7 @@ private static Encoding GetSystemEncoding(string encoding) // LUCENENET: CA1822:
             }
             if ("ISO8859-14".Equals(encoding, StringComparison.OrdinalIgnoreCase))
             {
-                return new ISO8859_14Encoding();
+                return ISO8859_14Encoding.Default;
             }
             // .NET doesn't recognize the encoding without a dash between ISO and the number
             // https://msdn.microsoft.com/en-us/library/system.text.encodinginfo.getencoding(v=vs.110).aspx

src/Lucene.Net.Analysis.Common/Analysis/Hunspell/ISO8859_14Decoder.cs

@@ -28,6 +28,11 @@ namespace Lucene.Net.Analysis.Hunspell
     [ExceptionToClassNameConvention]
     internal sealed class ISO8859_14Encoding : Encoding
     {
+        /// <summary>
+        /// The default singleton instance of the <see cref="ISO8859_14Encoding"/> class.
+        /// </summary>
+        public static new ISO8859_14Encoding Default { get; } = new ISO8859_14Encoding();
+
         private static readonly Decoder decoder = new ISO8859_14Decoder();
         public override Decoder GetDecoder()
         {
@@ -119,4 +124,4 @@ public override int GetChars(byte[] bytesIn, int byteIndex, int byteCount, char[
             return writeCount;
         }
     }
-}
+}

src/Lucene.Net.Analysis.Common/Analysis/Synonym/FSTSynonymFilterFactory.cs

@@ -1,6 +1,7 @@
 // Lucene version compatibility level 4.8.1
 using Lucene.Net.Analysis.Core;
 using Lucene.Net.Analysis.Util;
+using Lucene.Net.Support.Text;
 using Lucene.Net.Util;
 using System;
 using System.Collections.Generic;
@@ -117,7 +118,7 @@ public void Inform(IResourceLoader loader)
         /// </summary>
         private SynonymMap LoadSynonyms(IResourceLoader loader, string cname, bool dedup, Analyzer analyzer)
         {
-            Encoding decoder = Encoding.UTF8;
+            Encoding decoder = Encoding.UTF8.WithDecoderExceptionFallback();
 
             SynonymMap.Parser parser;
             Type clazz = loader.FindType(cname /*, typeof(SynonymMap.Parser) */);
@@ -165,4 +166,4 @@ private TokenizerFactory LoadTokenizerFactory(IResourceLoader loader, string cna
             }
         }
     }
-}
+}

src/Lucene.Net.Analysis.Common/Analysis/Util/AbstractAnalysisFactory.cs

@@ -1,6 +1,7 @@
 // Lucene version compatibility level 4.8.1
 using Lucene.Net.Analysis.Core;
 using Lucene.Net.Support;
+using Lucene.Net.Support.Text;
 using Lucene.Net.Util;
 using System;
 using System.Collections.Generic;
@@ -385,8 +386,9 @@ protected CharArraySet GetSnowballWordSet(IResourceLoader loader, string wordFil
                 words = new CharArraySet(m_luceneMatchVersion, files.Count * 10, ignoreCase);
                 foreach (string file in files)
                 {
+                    Encoding decoder = Encoding.UTF8.WithDecoderExceptionFallback();
                     using (Stream stream = loader.OpenResource(file.Trim()))
-                    using (TextReader reader = new StreamReader(stream, Encoding.UTF8))
+                    using (TextReader reader = new StreamReader(stream, decoder))
                     {
                         WordlistLoader.GetSnowballWordSet(reader, words);
                     }

src/Lucene.Net.Analysis.Kuromoji/JapaneseTokenizerFactory.cs

@@ -1,5 +1,6 @@
 using Lucene.Net.Analysis.Ja.Dict;
 using Lucene.Net.Analysis.Util;
+using Lucene.Net.Support.Text;
 using Lucene.Net.Util;
 using System;
 using System.Collections.Generic;
@@ -88,7 +89,7 @@ public virtual void Inform(IResourceLoader loader)
                 {
                     encoding = Encoding.UTF8.WebName;
                 }
-                Encoding decoder = Encoding.GetEncoding(encoding);
+                Encoding decoder = Encoding.GetEncoding(encoding).WithDecoderExceptionFallback();
                 TextReader reader = new StreamReader(stream, decoder);
                 userDictionary = new UserDictionary(reader);
             }

src/Lucene.Net.Analysis.Kuromoji/Tools/ConnectionCostsBuilder.cs

@@ -1,5 +1,6 @@
 using J2N.Text;
 using Lucene.Net.Diagnostics;
+using Lucene.Net.Support.Text;
 using System.Globalization;
 using System.IO;
 using System.Text;
@@ -31,7 +32,8 @@ public static class ConnectionCostsBuilder // LUCENENET specific: CA1052 Static
         public static ConnectionCostsWriter Build(string filename)
         {
             using Stream inputStream = new FileStream(filename, FileMode.Open, FileAccess.Read);
-            using StreamReader streamReader = new StreamReader(inputStream, Encoding.ASCII, detectEncodingFromByteOrderMarks: true, bufferSize: 1024, leaveOpen: true); // LUCENENET: CA2000: Use using statement
+            Encoding decoder = Encoding.ASCII.WithDecoderExceptionFallback();
+            using StreamReader streamReader = new StreamReader(inputStream, decoder, detectEncodingFromByteOrderMarks: true, bufferSize: 1024, leaveOpen: true); // LUCENENET: CA2000: Use using statement
 
             string line = streamReader.ReadLine();
             string[] dimensions = whiteSpaceRegex.Split(line).TrimEnd();

src/Lucene.Net.Analysis.Kuromoji/Tools/TokenInfoDictionaryBuilder.cs

@@ -1,5 +1,6 @@
 using J2N.Text;
 using Lucene.Net.Support;
+using Lucene.Net.Support.Text;
 using Lucene.Net.Util;
 using Lucene.Net.Util.Fst;
 using Lucene.Net.Util.Packed;
@@ -71,7 +72,7 @@ public virtual TokenInfoDictionaryWriter BuildDictionary(IList<string> csvFiles)
             foreach (string file in csvFiles)
             {
                 using Stream inputStream = new FileStream(file, FileMode.Open, FileAccess.Read);
-                Encoding decoder = Encoding.GetEncoding(encoding);
+                Encoding decoder = Encoding.GetEncoding(encoding).WithDecoderExceptionFallback();
                 using TextReader reader = new StreamReader(inputStream, decoder, detectEncodingFromByteOrderMarks: true, bufferSize: 1024, leaveOpen: true); // LUCENENET: CA2000: Use using statement
 
                 string line = null;

src/Lucene.Net.Analysis.Kuromoji/Tools/UnknownDictionaryBuilder.cs

@@ -1,5 +1,6 @@
 using J2N.Text;
 using Lucene.Net.Analysis.Ja.Dict;
+using Lucene.Net.Support.Text;
 using System;
 using System.Collections.Generic;
 using System.Globalization;
@@ -55,7 +56,7 @@ public virtual UnknownDictionaryWriter ReadDictionaryFile(string filename, strin
             UnknownDictionaryWriter dictionary = new UnknownDictionaryWriter(5 * 1024 * 1024);
 
             JCG.List<string[]> lines = new JCG.List<string[]>();
-            Encoding decoder = Encoding.GetEncoding(encoding);
+            Encoding decoder = Encoding.GetEncoding(encoding).WithDecoderExceptionFallback();
             using (Stream inputStream = new FileStream(filename, FileMode.Open, FileAccess.Read))
             using (TextReader reader = new StreamReader(inputStream, decoder))
             {

src/Lucene.Net.Analysis.SmartCn/Hhmm/AbstractDictionary.cs

@@ -32,14 +32,17 @@ namespace Lucene.Net.Analysis.Cn.Smart.Hhmm
     /// </summary>
     internal abstract class AbstractDictionary
     {
+        // LUCENENET specific: cached GB2312 encoding to avoid repeated calls to Encoding.GetEncoding("GB2312")
+        protected static readonly Encoding gb2312Encoding = Encoding.GetEncoding("GB2312");
+
         /// <summary>
         /// First Chinese Character in GB2312 (15 * 94)
         /// Characters in GB2312 are arranged in a grid of 94 * 94, 0-14 are unassigned or punctuation.
         /// </summary>
         public const int GB2312_FIRST_CHAR = 1410;
 
         /// <summary>
-        /// Last Chinese Character in GB2312 (87 * 94). 
+        /// Last Chinese Character in GB2312 (87 * 94).
         /// Characters in GB2312 are arranged in a grid of 94 * 94, 88-94 are unassigned.
         /// </summary>
         public const int GB2312_CHAR_NUM = 87 * 94;
@@ -98,7 +101,7 @@ public virtual string GetCCByGB2312Id(int ccid)
             try
             {
                 //String cchar = new String(buffer, "GB2312");
-                string cchar = Encoding.GetEncoding("GB2312").GetString(buffer);
+                string cchar = gb2312Encoding.GetString(buffer); // LUCENENET specific: use cached encoding instance
                 return cchar;
             }
             catch (Exception e) when (e.IsUnsupportedEncodingException()) // Encoding is not supported by the platform
@@ -117,15 +120,15 @@ public virtual short GetGB2312Id(char ch)
             try
             {
                 //byte[] buffer = Character.ToString(ch).getBytes("GB2312");
-                byte[] buffer = Encoding.GetEncoding("GB2312").GetBytes(ch.ToString());
+                byte[] buffer = gb2312Encoding.GetBytes(ch.ToString()); // LUCENENET specific: use cached encoding instance
                 //byte[] buffer = Encoding.GetEncoding("hz-gb-2312").GetBytes(ch.ToString());
                 if (buffer.Length != 2)
                 {
                     // Should be a two-byte character
                     return -1;
                 }
                 int b0 = (buffer[0] & 0x0FF) - 161; // Code starts from A1, therefore subtract 0xA1=161
-                int b1 = (buffer[1] & 0x0FF) - 161; // There is no Chinese char for the first and last symbol. 
+                int b1 = (buffer[1] & 0x0FF) - 161; // There is no Chinese char for the first and last symbol.
                                                     // Therefore, each code page only has 16*6-2=94 characters.
                 return (short)(b0 * 94 + b1);
             }

src/Lucene.Net.Analysis.SmartCn/Hhmm/BigramDictionary.cs

@@ -302,7 +302,7 @@ public virtual void LoadFromFile(string dctFilePath)
                         byte[] lchBuffer = new byte[length];
                         dctFile.Read(lchBuffer, 0, lchBuffer.Length);
                         //tmpword = new String(lchBuffer, "GB2312");
-                        tmpword = Encoding.GetEncoding("GB2312").GetString(lchBuffer);
+                        tmpword = gb2312Encoding.GetString(lchBuffer); // LUCENENET specific: use cached encoding instance from base class
                         //tmpword = Encoding.GetEncoding("hz-gb-2312").GetString(lchBuffer);
                         if (i != 3755 + GB2312_FIRST_CHAR)
                         {

src/Lucene.Net.Analysis.SmartCn/Hhmm/WordDictionary.cs

@@ -395,7 +395,7 @@ private int LoadMainDataFromFile(string dctFilePath)
                         {
                             byte[] lchBuffer = new byte[length];
                             dctFile.Read(lchBuffer, 0, lchBuffer.Length);
-                            tmpword = Encoding.GetEncoding("GB2312").GetString(lchBuffer);
+                            tmpword = gb2312Encoding.GetString(lchBuffer); // LUCENENET specific: use cached encoding instance from base class
                             wordItem_charArrayTable[i][j] = tmpword.ToCharArray();
                         }
                         else

src/Lucene.Net.Benchmark/ByTask/Feeds/ContentItemsSource.cs

@@ -32,15 +32,15 @@ namespace Lucene.Net.Benchmarks.ByTask.Feeds
     /// Base class for source of data for benchmarking.
     /// </summary>
     /// <remarks>
-    /// Keeps track of various statistics, such as how many data items were generated, 
+    /// Keeps track of various statistics, such as how many data items were generated,
     /// size in bytes etc.
     /// <para/>
     /// Supports the following configuration parameters:
     /// <list type="bullet">
     ///     <item><term>content.source.forever</term><description>specifies whether to generate items forever (<b>default=true</b>).</description></item>
     ///     <item><term>content.source.verbose</term><description>specifies whether messages should be output by the content source (<b>default=false</b>).</description></item>
     ///     <item><term>content.source.encoding</term><description>
-    ///         specifies which encoding to use when 
+    ///         specifies which encoding to use when
     ///         reading the files of that content source. Certain implementations may define
     ///         a default value if this parameter is not specified. (<b>default=null</b>).
     ///     </description></item>
@@ -199,7 +199,7 @@ public virtual void SetConfig(Config config)
             }
             else
             {
-                m_encoding = Encoding.GetEncoding(0); // Default system encoding
+                m_encoding = Encoding.Default; // Default system encoding
             }
         }
 

src/Lucene.Net.Benchmark/ByTask/Tasks/CreateIndexTask.cs

@@ -215,7 +215,7 @@ public static IndexWriter ConfigureWriter(Config config, PerfRunData runData, Op
                 else
                 {
                     FileInfo f = new FileInfo(infoStreamVal);
-                    iwc.SetInfoStream(new StreamWriter(new FileStream(f.FullName, FileMode.Create, FileAccess.Write), Encoding.GetEncoding(0)));
+                    iwc.SetInfoStream(new StreamWriter(new FileStream(f.FullName, FileMode.Create, FileAccess.Write), Encoding.Default));
                 }
             }
             IndexWriter writer = new IndexWriter(runData.Directory, iwc);

src/Lucene.Net.Benchmark/Quality/Trec/QueryDriver.cs

@@ -77,10 +77,13 @@ public static void Main(string[] args)
             string fieldSpec = args.Length == 5 ? args[4] : "T"; // default to Title-only if not specified.
             IndexSearcher searcher = new IndexSearcher(reader);
 
-            int maxResults = 1000;
-            string docNameField = "docname";
+            const int maxResults = 1000;
+            const string docNameField = "docname";
 
-            TextWriter logger = Console.Out; //new StreamWriter(Console, Encoding.GetEncoding(0));
+            using TextWriter logger = new StreamWriter(System.Console.OpenStandardOutput(), Encoding.Default)
+            {
+                AutoFlush = true,
+            };
 
             // use trec utilities to read trec topics into quality queries
             TrecTopicsReader qReader = new TrecTopicsReader();

src/Lucene.Net.TestFramework/Util/LineFileDocs.cs

@@ -2,6 +2,7 @@
 using J2N.Threading.Atomic;
 using Lucene.Net.Documents;
 using Lucene.Net.Support.IO;
+using Lucene.Net.Support.Text;
 using Lucene.Net.Support.Threading;
 using RandomizedTesting.Generators;
 using System;
@@ -236,7 +237,8 @@ private void Open(Random random)
                     } while (b >= 0 && b != 13 && b != 10);
                 }
 
-                reader = new StreamReader(@is, Encoding.UTF8, detectEncodingFromByteOrderMarks: false, bufferSize: BUFFER_SIZE);
+                Encoding decoder = Encoding.UTF8.WithDecoderExceptionFallback();
+                reader = new StreamReader(@is, decoder, detectEncodingFromByteOrderMarks: false, bufferSize: BUFFER_SIZE);
 
                 if (seekTo > 0L)
                 {
@@ -399,4 +401,4 @@ internal static string MaybeCreateTempFile(bool removeAfterClass = true)
             return result;
         }
     }
-}
+}

src/Lucene.Net.Tests.AllProjects/Support/ExceptionHandling/ExceptionScanningTestCase.cs

@@ -13,6 +13,7 @@
 using System.Reflection;
 using System.Resources;
 using System.Security;
+using System.Text;
 using Assert = Lucene.Net.TestFramework.Assert;
 
 namespace Lucene.Net.Support.ExceptionHandling
@@ -184,6 +185,8 @@ private static IEnumerable<Type> LoadKnownErrorExceptionTypes()
                 typeof(UnauthorizedAccessException),
                 typeof(ObjectDisposedException),
                 typeof(Lucene.AlreadyClosedException),
+                typeof(EncoderFallbackException), // In Java, CharacterCodingException subclasses IOException
+                typeof(DecoderFallbackException),
             }.Union(AllIOExceptionTypes)
             // .NET Framework only - Subclasses UnauthorizedAccessException
             .Union(new[] { PrivilegeNotHeldExceptionType });
@@ -221,8 +224,6 @@ private static IEnumerable<Type> LoadKnownErrorExceptionTypes()
             // Subclasses
             typeof(System.DuplicateWaitObjectException),
             typeof(System.Globalization.CultureNotFoundException),
-            typeof(System.Text.DecoderFallbackException),
-            typeof(System.Text.EncoderFallbackException),
         };
 
         public static readonly IEnumerable<Type> KnownIllegalArgumentExceptionTypes_TestEnvironment = new Type[] {
@@ -234,8 +235,6 @@ private static IEnumerable<Type> LoadKnownErrorExceptionTypes()
             // Subclasses
             typeof(System.DuplicateWaitObjectException),
             typeof(System.Globalization.CultureNotFoundException),
-            typeof(System.Text.DecoderFallbackException),
-            typeof(System.Text.EncoderFallbackException),
         };
 
         public static readonly IEnumerable<Type> KnownRuntimeExceptionTypes = LoadKnownRuntimeExceptionTypes();
@@ -367,8 +366,6 @@ private static IEnumerable<Type> LoadKnownRuntimeExceptionTypes()
                 typeof(System.Runtime.Serialization.SerializationException),
                 typeof(System.Security.Cryptography.CryptographicException),
                 typeof(System.Security.VerificationException),
-                typeof(System.Text.DecoderFallbackException), // LUCENENET TODO: Need to be sure about this one
-                typeof(System.Text.EncoderFallbackException), // LUCENENET TODO: Need to be sure about this one
                 typeof(System.Threading.AbandonedMutexException),
                 typeof(System.Threading.SemaphoreFullException),
                 typeof(System.Threading.SynchronizationLockException),