diff options
Diffstat (limited to 'csharp/src/ProtocolBuffers/FieldAccess/ReflectionUtil.cs')
| -rw-r--r-- | csharp/src/ProtocolBuffers/FieldAccess/ReflectionUtil.cs | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/csharp/src/ProtocolBuffers/FieldAccess/ReflectionUtil.cs b/csharp/src/ProtocolBuffers/FieldAccess/ReflectionUtil.cs deleted file mode 100644 index 798f0dd7..00000000 --- a/csharp/src/ProtocolBuffers/FieldAccess/ReflectionUtil.cs +++ /dev/null @@ -1,189 +0,0 @@ -// 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.Reflection;
-
-namespace Google.ProtocolBuffers.FieldAccess
-{
- /// <summary>
- /// The methods in this class are somewhat evil, and should not be tampered with lightly.
- /// Basically they allow the creation of relatively weakly typed delegates from MethodInfos
- /// which are more strongly typed. They do this by creating an appropriate strongly typed
- /// delegate from the MethodInfo, and then calling that within an anonymous method.
- /// Mind-bending stuff (at least to your humble narrator) but the resulting delegates are
- /// very fast compared with calling Invoke later on.
- /// </summary>
- internal static class ReflectionUtil
- {
- /// <summary>
- /// Empty Type[] used when calling GetProperty to force property instead of indexer fetching.
- /// </summary>
- internal static readonly Type[] EmptyTypes = new Type[0];
-
- /// <summary>
- /// Creates a delegate which will execute the given method and then return
- /// the result as an object.
- /// </summary>
- public static Func<T, object> CreateUpcastDelegate<T>(MethodInfo method)
- {
- // The tricky bit is invoking CreateCreateUpcastDelegateImpl with the right type parameters
- MethodInfo openImpl = typeof(ReflectionUtil).GetMethod("CreateUpcastDelegateImpl");
- MethodInfo closedImpl = openImpl.MakeGenericMethod(typeof(T), method.ReturnType);
- return (Func<T, object>) closedImpl.Invoke(null, new object[] {method});
- }
-
- /// <summary>
- /// Method used solely for implementing CreateUpcastDelegate. Public to avoid trust issues
- /// in low-trust scenarios.
- /// </summary>
- public static Func<TSource, object> CreateUpcastDelegateImpl<TSource, TResult>(MethodInfo method)
- {
- // Convert the reflection call into an open delegate, i.e. instead of calling x.Method()
- // we'll call getter(x).
- Func<TSource, TResult> getter = ReflectionUtil.CreateDelegateFunc<TSource, TResult>(method);
-
- // Implicit upcast to object (within the delegate)
- return delegate(TSource source) { return getter(source); };
- }
-
- /// <summary>
- /// Creates a delegate which will execute the given method after casting the parameter
- /// down from object to the required parameter type.
- /// </summary>
- public static Action<T, object> CreateDowncastDelegate<T>(MethodInfo method)
- {
- MethodInfo openImpl = typeof(ReflectionUtil).GetMethod("CreateDowncastDelegateImpl");
- MethodInfo closedImpl = openImpl.MakeGenericMethod(typeof(T), method.GetParameters()[0].ParameterType);
- return (Action<T, object>) closedImpl.Invoke(null, new object[] {method});
- }
-
- public static Action<TSource, object> CreateDowncastDelegateImpl<TSource, TParam>(MethodInfo method)
- {
- // Convert the reflection call into an open delegate, i.e. instead of calling x.Method(y) we'll
- // call Method(x, y)
- Action<TSource, TParam> call = ReflectionUtil.CreateDelegateAction<TSource, TParam>(method);
-
- return delegate(TSource source, object parameter) { call(source, (TParam) parameter); };
- }
-
- /// <summary>
- /// Creates a delegate which will execute the given method after casting the parameter
- /// down from object to the required parameter type.
- /// </summary>
- public static Action<T, object> CreateDowncastDelegateIgnoringReturn<T>(MethodInfo method)
- {
- MethodInfo openImpl = typeof(ReflectionUtil).GetMethod("CreateDowncastDelegateIgnoringReturnImpl");
- MethodInfo closedImpl = openImpl.MakeGenericMethod(typeof(T), method.GetParameters()[0].ParameterType,
- method.ReturnType);
- return (Action<T, object>) closedImpl.Invoke(null, new object[] {method});
- }
-
- public static Action<TSource, object> CreateDowncastDelegateIgnoringReturnImpl<TSource, TParam, TReturn>(
- MethodInfo method)
- {
- // Convert the reflection call into an open delegate, i.e. instead of calling x.Method(y) we'll
- // call Method(x, y)
- Func<TSource, TParam, TReturn> call = ReflectionUtil.CreateDelegateFunc<TSource, TParam, TReturn>(method);
-
- return delegate(TSource source, object parameter) { call(source, (TParam) parameter); };
- }
-
- /// <summary>
- /// Creates a delegate which will execute the given static method and cast the result up to IBuilder.
- /// </summary>
- public static Func<IBuilder> CreateStaticUpcastDelegate(MethodInfo method)
- {
- MethodInfo openImpl = typeof(ReflectionUtil).GetMethod("CreateStaticUpcastDelegateImpl");
- MethodInfo closedImpl = openImpl.MakeGenericMethod(method.ReturnType);
- return (Func<IBuilder>) closedImpl.Invoke(null, new object[] {method});
- }
-
- public static Func<IBuilder> CreateStaticUpcastDelegateImpl<T>(MethodInfo method)
- {
- Func<T> call = ReflectionUtil.CreateDelegateFunc<T>(method);
- return delegate { return (IBuilder) call(); };
- }
-
-
- internal static Func<TResult> CreateDelegateFunc<TResult>(MethodInfo method)
- {
-#if !CF20
- object tdelegate = Delegate.CreateDelegate(typeof(Func<TResult>), null, method);
- return (Func<TResult>)tdelegate;
-#else
- return delegate() { return (TResult)method.Invoke(null, null); };
-#endif
- }
-
- internal static Func<T, TResult> CreateDelegateFunc<T, TResult>(MethodInfo method)
- {
-#if !CF20
- object tdelegate = Delegate.CreateDelegate(typeof(Func<T, TResult>), null, method);
- return (Func<T, TResult>)tdelegate;
-#else
- if (method.IsStatic)
- {
- return delegate(T arg1) { return (TResult) method.Invoke(null, new object[] {arg1}); };
- }
- return delegate(T arg1) { return (TResult)method.Invoke(arg1, null); };
-#endif
- }
-
- internal static Func<T1, T2, TResult> CreateDelegateFunc<T1, T2, TResult>(MethodInfo method)
- {
-#if !CF20
- object tdelegate = Delegate.CreateDelegate(typeof(Func<T1, T2, TResult>), null, method);
- return (Func<T1, T2, TResult>)tdelegate;
-#else
- if (method.IsStatic)
- {
- return delegate(T1 arg1, T2 arg2) { return (TResult) method.Invoke(null, new object[] {arg1, arg2}); };
- }
- return delegate(T1 arg1, T2 arg2) { return (TResult)method.Invoke(arg1, new object[] { arg2 }); };
-#endif
- }
-
- internal static Action<T1, T2> CreateDelegateAction<T1, T2>(MethodInfo method)
- {
-#if !CF20
- object tdelegate = Delegate.CreateDelegate(typeof(Action<T1, T2>), null, method);
- return (Action<T1, T2>)tdelegate;
-#else
- if (method.IsStatic)
- {
- return delegate(T1 arg1, T2 arg2) { method.Invoke(null, new object[] {arg1, arg2}); };
- }
- return delegate(T1 arg1, T2 arg2) { method.Invoke(arg1, new object[] { arg2 }); };
-#endif
- }
- }
-}
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