diff options
Diffstat (limited to 'src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs')
-rw-r--r-- | src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs | 302 |
1 files changed, 159 insertions, 143 deletions
diff --git a/src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs b/src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs index 6bae59cb..0c2cdfcf 100644 --- a/src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs +++ b/src/ProtocolBuffers/FieldAccess/RepeatedPrimitiveAccessor.cs @@ -1,144 +1,160 @@ -// 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 = (Func<TBuilder, IBuilder>)Delegate.CreateDelegate(typeof(Func<TBuilder, IBuilder>), null, clearMethod); - countDelegate = (Func<TMessage, int>)Delegate.CreateDelegate - (typeof(Func<TMessage, int>), null, 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); - } - } +// 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 =
+ (Func<TBuilder, IBuilder>) Delegate.CreateDelegate(typeof (Func<TBuilder, IBuilder>), null, clearMethod);
+ countDelegate = (Func<TMessage, int>) Delegate.CreateDelegate
+ (typeof (Func<TMessage, int>), null, 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);
+ }
+ }
}
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