| #region Copyright notice and license |
| // Protocol Buffers - Google's data interchange format |
| // Copyright 2015 Google Inc. All rights reserved. |
| // https://developers.google.com/protocol-buffers/ |
| // |
| // 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. |
| #endregion |
| |
| using System; |
| using System.Reflection; |
| |
| #if !NET35 |
| namespace Google.Protobuf.Compatibility |
| { |
| /// <summary> |
| /// Provides extension methods on Type that just proxy to TypeInfo. |
| /// These are used to support the new type system from .NET 4.5, without |
| /// having calls to GetTypeInfo all over the place. While the methods here are meant to be |
| /// broadly compatible with the desktop framework, there are some subtle differences in behaviour - but |
| /// they're not expected to affect our use cases. While the class is internal, that should be fine: we can |
| /// evaluate each new use appropriately. |
| /// </summary> |
| internal static class TypeExtensions |
| { |
| /// <summary> |
| /// See https://msdn.microsoft.com/en-us/library/system.type.isassignablefrom |
| /// </summary> |
| internal static bool IsAssignableFrom(this Type target, Type c) |
| { |
| return target.GetTypeInfo().IsAssignableFrom(c.GetTypeInfo()); |
| } |
| |
| /// <summary> |
| /// Returns a representation of the public property associated with the given name in the given type, |
| /// including inherited properties or null if there is no such public property. |
| /// Here, "public property" means a property where either the getter, or the setter, or both, is public. |
| /// </summary> |
| internal static PropertyInfo GetProperty(this Type target, string name) |
| { |
| // GetDeclaredProperty only returns properties declared in the given type, so we need to recurse. |
| while (target != null) |
| { |
| var typeInfo = target.GetTypeInfo(); |
| var ret = typeInfo.GetDeclaredProperty(name); |
| if (ret != null && ((ret.CanRead && ret.GetMethod.IsPublic) || (ret.CanWrite && ret.SetMethod.IsPublic))) |
| { |
| return ret; |
| } |
| target = typeInfo.BaseType; |
| } |
| return null; |
| } |
| |
| /// <summary> |
| /// Returns a representation of the public method associated with the given name in the given type, |
| /// including inherited methods. |
| /// </summary> |
| /// <remarks> |
| /// This has a few differences compared with Type.GetMethod in the desktop framework. It will throw |
| /// if there is an ambiguous match even between a private method and a public one, but it *won't* throw |
| /// if there are two overloads at different levels in the type hierarchy (e.g. class Base declares public void Foo(int) and |
| /// class Child : Base declares public void Foo(long)). |
| /// </remarks> |
| /// <exception cref="AmbiguousMatchException">One type in the hierarchy declared more than one method with the same name</exception> |
| internal static MethodInfo GetMethod(this Type target, string name) |
| { |
| // GetDeclaredMethod only returns methods declared in the given type, so we need to recurse. |
| while (target != null) |
| { |
| var typeInfo = target.GetTypeInfo(); |
| var ret = typeInfo.GetDeclaredMethod(name); |
| if (ret != null && ret.IsPublic) |
| { |
| return ret; |
| } |
| target = typeInfo.BaseType; |
| } |
| return null; |
| } |
| } |
| } |
| #endif |