1 files changed, 158 insertions, 0 deletions
diff --git a/csharp/src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs b/csharp/src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs
new file mode 100644
index 00000000..d3b926bc
--- /dev/null
+++ b/csharp/src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs
@@ -0,0 +1,158 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// http://github.com/jskeet/dotnet-protobufs/
+// Original C++/Java/Python code:
+// http://code.google.com/p/protobuf/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+using System;
+using System.Collections;
+using System.Reflection;
+
+namespace Google.ProtocolBuffers.FieldAccess
+{
+    /// <summary>
+    /// Accessor for a repeated field of type int, ByteString etc.
+    /// </summary>
+    internal class RepeatedPrimitiveAccessor<TMessage, TBuilder> : IFieldAccessor<TMessage, TBuilder>
+        where TMessage : IMessage<TMessage, TBuilder>
+        where TBuilder : IBuilder<TMessage, TBuilder>
+    {
+        private readonly Type clrType;
+        private readonly Func<TMessage, object> getValueDelegate;
+        private readonly Func<TBuilder, IBuilder> clearDelegate;
+        private readonly Action<TBuilder, object> addValueDelegate;
+        private readonly Func<TBuilder, object> getRepeatedWrapperDelegate;
+        private readonly Func<TMessage, int> countDelegate;
+        private readonly MethodInfo getElementMethod;
+        private readonly MethodInfo setElementMethod;
+
+        // Replacement for Type.EmptyTypes which apparently isn't available on the compact framework
+        internal static readonly Type[] EmptyTypes = new Type[0];
+
+        /// <summary>
+        /// The CLR type of the field (int, the enum type, ByteString, the message etc).
+        /// This is taken from the return type of the method used to retrieve a single
+        /// value.
+        /// </summary>
+        protected Type ClrType
+        {
+            get { return clrType; }
+        }
+
+        internal RepeatedPrimitiveAccessor(string name)
+        {
+            PropertyInfo messageProperty = typeof(TMessage).GetProperty(name + "List");
+            PropertyInfo builderProperty = typeof(TBuilder).GetProperty(name + "List");
+            PropertyInfo countProperty = typeof(TMessage).GetProperty(name + "Count");
+            MethodInfo clearMethod = typeof(TBuilder).GetMethod("Clear" + name, EmptyTypes);
+            getElementMethod = typeof(TMessage).GetMethod("Get" + name, new Type[] {typeof(int)});
+            clrType = getElementMethod.ReturnType;
+            MethodInfo addMethod = typeof(TBuilder).GetMethod("Add" + name, new Type[] {ClrType});
+            setElementMethod = typeof(TBuilder).GetMethod("Set" + name, new Type[] {typeof(int), ClrType});
+            if (messageProperty == null
+                || builderProperty == null
+                || countProperty == null
+                || clearMethod == null
+                || addMethod == null
+                || getElementMethod == null
+                || setElementMethod == null)
+            {
+                throw new ArgumentException("Not all required properties/methods available");
+            }
+            clearDelegate = ReflectionUtil.CreateDelegateFunc<TBuilder, IBuilder>(clearMethod);
+            countDelegate = ReflectionUtil.CreateDelegateFunc<TMessage, int>(countProperty.GetGetMethod());
+            getValueDelegate = ReflectionUtil.CreateUpcastDelegate<TMessage>(messageProperty.GetGetMethod());
+            addValueDelegate = ReflectionUtil.CreateDowncastDelegateIgnoringReturn<TBuilder>(addMethod);
+            getRepeatedWrapperDelegate = ReflectionUtil.CreateUpcastDelegate<TBuilder>(builderProperty.GetGetMethod());
+        }
+
+        public bool Has(TMessage message)
+        {
+            throw new InvalidOperationException();
+        }
+
+        public virtual IBuilder CreateBuilder()
+        {
+            throw new InvalidOperationException();
+        }
+
+        public virtual object GetValue(TMessage message)
+        {
+            return getValueDelegate(message);
+        }
+
+        public void SetValue(TBuilder builder, object value)
+        {
+            // Add all the elements individually.  This serves two purposes:
+            // 1) Verifies that each element has the correct type.
+            // 2) Insures that the caller cannot modify the list later on and
+            //    have the modifications be reflected in the message.
+            Clear(builder);
+            foreach (object element in (IEnumerable) value)
+            {
+                AddRepeated(builder, element);
+            }
+        }
+
+        public void Clear(TBuilder builder)
+        {
+            clearDelegate(builder);
+        }
+
+        public int GetRepeatedCount(TMessage message)
+        {
+            return countDelegate(message);
+        }
+
+        public virtual object GetRepeatedValue(TMessage message, int index)
+        {
+            return getElementMethod.Invoke(message, new object[] {index});
+        }
+
+        public virtual void SetRepeated(TBuilder builder, int index, object value)
+        {
+            ThrowHelper.ThrowIfNull(value, "value");
+            setElementMethod.Invoke(builder, new object[] {index, value});
+        }
+
+        public virtual void AddRepeated(TBuilder builder, object value)
+        {
+            ThrowHelper.ThrowIfNull(value, "value");
+            addValueDelegate(builder, value);
+        }
+
+        /// <summary>
+        /// The builder class's accessor already builds a read-only wrapper for
+        /// us, which is exactly what we want.
+        /// </summary>
+        public object GetRepeatedWrapper(TBuilder builder)
+        {
+            return getRepeatedWrapperDelegate(builder);
+        }
+    }
+}
+\ No newline at end of file