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author | Jan Tattermusch <jtattermusch@users.noreply.github.com> | 2015-04-17 14:15:52 -0700 |
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committer | Jan Tattermusch <jtattermusch@users.noreply.github.com> | 2015-04-17 14:15:52 -0700 |
commit | 01c8c35ca3d3424a9473dd22ea2456933b3e8d36 (patch) | |
tree | de582cb9ef3e449f24015dec09f80e998806b26a /csharp/src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs | |
parent | 813d6d652d8091e9365bfbd01efb5f2ee8bdfbce (diff) | |
parent | 1eab56aee8dddcb656db67d9fb87a8cc6a2ac112 (diff) | |
download | protobuf-01c8c35ca3d3424a9473dd22ea2456933b3e8d36.tar.gz protobuf-01c8c35ca3d3424a9473dd22ea2456933b3e8d36.tar.bz2 protobuf-01c8c35ca3d3424a9473dd22ea2456933b3e8d36.zip |
Merge pull request #2 from jtattermusch/csharp_protobuf_imported
Pulling protobuf-csharp-port into csharp/ directory
Diffstat (limited to 'csharp/src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs')
-rw-r--r-- | csharp/src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs | 158 |
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 |