1 files changed, 0 insertions, 150 deletions
diff --git a/csharp/ProtocolBuffers/MessageStreamIterator.cs b/csharp/ProtocolBuffers/MessageStreamIterator.cs
deleted file mode 100644
index 61dbf840..00000000
--- a/csharp/ProtocolBuffers/MessageStreamIterator.cs
+++ /dev/null
@@ -1,150 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-using System.Collections;
-using System.IO;
-using System.Reflection;
-
-namespace Google.ProtocolBuffers {
-
-  /// <summary>
-  /// Iterates over data created using a <see cref="MessageStreamWriter{T}" />.
-  /// Unlike MessageStreamWriter, this class is not usually constructed directly with
-  /// a stream; instead it is provided with a way of opening a stream when iteration
-  /// is started. The stream is closed when the iteration is completed or the enumerator
-  /// is disposed. (This occurs naturally when using <c>foreach</c>.)
-  /// </summary>
-  public class MessageStreamIterator<TMessage> : IEnumerable<TMessage>
-      where TMessage : IMessage<TMessage> {
-
-    private readonly StreamProvider streamProvider;
-    private readonly ExtensionRegistry extensionRegistry;
-
-    /// <summary>
-    /// Delegate created via reflection trickery (once per type) to create a builder
-    /// and read a message from a CodedInputStream with it. Note that unlike in Java,
-    /// there's one static field per constructed type.
-    /// </summary>
-    private static readonly Func<CodedInputStream, ExtensionRegistry, TMessage> messageReader = BuildMessageReader();
-
-    /// <summary>
-    /// Any exception (within reason) thrown within messageReader is caught and rethrown in the constructor.
-    /// This makes life a lot simpler for the caller.
-    /// </summary>
-    private static Exception typeInitializationException;
-
-    /// <summary>
-    /// Creates the delegate later used to read messages. This is only called once per type, but to
-    /// avoid exceptions occurring at confusing times, if this fails it will set typeInitializationException
-    /// to the appropriate error and return null.
-    /// </summary>
-    private static Func<CodedInputStream, ExtensionRegistry, TMessage> BuildMessageReader() {
-      try {
-        Type builderType = FindBuilderType();
-
-        // Yes, it's redundant to find this again, but it's only the once...
-        MethodInfo createBuilderMethod = typeof(TMessage).GetMethod("CreateBuilder", Type.EmptyTypes);
-        Delegate builderBuilder = Delegate.CreateDelegate(
-            typeof(Func<>).MakeGenericType(builderType), null, createBuilderMethod);
-
-        MethodInfo buildMethod = typeof(MessageStreamIterator<TMessage>)
-            .GetMethod("BuildImpl", BindingFlags.Static | BindingFlags.NonPublic)
-            .MakeGenericMethod(typeof(TMessage), builderType);
-
-        return (Func<CodedInputStream, ExtensionRegistry, TMessage>)Delegate.CreateDelegate(
-          typeof(Func<CodedInputStream, ExtensionRegistry, TMessage>), builderBuilder, buildMethod);
-      } catch (ArgumentException e) {
-        typeInitializationException = e;
-      } catch (InvalidOperationException e) {
-        typeInitializationException = e;
-      } catch (InvalidCastException e) {
-        // Can't see why this would happen, but best to know about it.
-        typeInitializationException = e;
-      }
-      return null;
-    }
-
-    /// <summary>
-    /// Works out the builder type for TMessage, or throws an ArgumentException to explain why it can't.
-    /// This will check 
-    /// </summary>
-    private static Type FindBuilderType() {
-      MethodInfo createBuilderMethod = typeof(TMessage).GetMethod("CreateBuilder", Type.EmptyTypes);
-      if (createBuilderMethod == null) {
-        throw new ArgumentException("Message type " + typeof(TMessage).FullName + " has no CreateBuilder method.");
-      }
-      if (createBuilderMethod.ReturnType == typeof(void)) {
-        throw new ArgumentException("CreateBuilder method in " + typeof(TMessage).FullName + " has void return type");
-      }
-      Type builderType = createBuilderMethod.ReturnType;
-      Type messageInterface = typeof(IMessage<,>).MakeGenericType(typeof(TMessage), builderType);
-      Type builderInterface = typeof(IBuilder<,>).MakeGenericType(typeof(TMessage), builderType);
-      if (Array.IndexOf(typeof(TMessage).GetInterfaces(), messageInterface) == -1) {
-        throw new ArgumentException("Message type " + typeof(TMessage) + " doesn't implement " + messageInterface.FullName);
-      }
-      if (Array.IndexOf(builderType.GetInterfaces(), builderInterface) == -1) {
-        throw new ArgumentException("Builder type " + typeof(TMessage) + " doesn't implement " + builderInterface.FullName);
-      }
-      return builderType;
-    }
-
-    /// <summary>
-    /// Method we'll use to build messageReader, with the first parameter fixed to TMessage.CreateBuilder. Note that we
-    /// have to introduce another type parameter (TMessage2) as we can't constrain TMessage for just a single method
-    /// (and we can't do it at the type level because we don't know TBuilder). However, by constraining TMessage2
-    /// to not only implement IMessage appropriately but also to derive from TMessage2, we can avoid doing a cast
-    /// for every message; the implicit reference conversion will be fine. In practice, TMessage2 and TMessage will
-    /// be the same type when we construct the generic method by reflection.
-    /// </summary>
-    private static TMessage BuildImpl<TMessage2, TBuilder>(Func<TBuilder> builderBuilder, CodedInputStream input, ExtensionRegistry registry) 
-        where TBuilder : IBuilder<TMessage2, TBuilder>
-        where TMessage2 : TMessage, IMessage<TMessage2, TBuilder> {
-      TBuilder builder = builderBuilder();
-      input.ReadMessage(builder, registry);
-      return builder.Build();
-    }
-    
-    private static readonly uint ExpectedTag = WireFormat.MakeTag(1, WireFormat.WireType.LengthDelimited);
-
-    private MessageStreamIterator(StreamProvider streamProvider, ExtensionRegistry extensionRegistry) {
-      if (messageReader == null) {
-        throw typeInitializationException;
-      }
-      this.streamProvider = streamProvider;
-      this.extensionRegistry = extensionRegistry;
-    }
-
-    /// <summary>
-    /// Creates a new instance which uses the same stream provider as this one,
-    /// but the specified extension registry.
-    /// </summary>
-    public MessageStreamIterator<TMessage> WithExtensionRegistry(ExtensionRegistry newRegistry) {
-      return new MessageStreamIterator<TMessage>(streamProvider, newRegistry);
-    }
-
-    public static MessageStreamIterator<TMessage> FromFile(string file) {
-      return new MessageStreamIterator<TMessage>(() => File.OpenRead(file), ExtensionRegistry.Empty);
-    }
-
-    public static MessageStreamIterator<TMessage> FromStreamProvider(StreamProvider streamProvider) {
-      return new MessageStreamIterator<TMessage>(streamProvider, ExtensionRegistry.Empty);
-    }
-
-    public IEnumerator<TMessage> GetEnumerator() {
-      using (Stream stream = streamProvider()) {
-        CodedInputStream input = CodedInputStream.CreateInstance(stream);
-        uint tag;
-        while ((tag = input.ReadTag()) != 0) {
-          if (tag != ExpectedTag) {
-            throw InvalidProtocolBufferException.InvalidMessageStreamTag();
-          }
-          yield return messageReader(input, extensionRegistry);
-        }
-      }
-    }
-
-    IEnumerator IEnumerable.GetEnumerator() {
-      return GetEnumerator();
-    }
-  }
-}