1b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer#region Copyright notice and license 2b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// Protocol Buffers - Google's data interchange format 3b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// Copyright 2015 Google Inc. All rights reserved. 4b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// https://developers.google.com/protocol-buffers/ 5b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// 6b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// Redistribution and use in source and binary forms, with or without 7b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// modification, are permitted provided that the following conditions are 8b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// met: 9b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// 10b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// * Redistributions of source code must retain the above copyright 11b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// notice, this list of conditions and the following disclaimer. 12b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// * Redistributions in binary form must reproduce the above 13b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// copyright notice, this list of conditions and the following disclaimer 14b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// in the documentation and/or other materials provided with the 15b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// distribution. 16b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// * Neither the name of Google Inc. nor the names of its 17b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// contributors may be used to endorse or promote products derived from 18b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// this software without specific prior written permission. 19b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// 20b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer#endregion 32b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer 33b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammerusing System; 34b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammerusing System.Reflection; 35b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammerusing Google.Protobuf.Compatibility; 36b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer 37b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammernamespace Google.Protobuf.Reflection 38b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer{ 39b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// <summary> 40b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// Reflection access for a oneof, allowing clear and "get case" actions. 41b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// </summary> 42b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer public sealed class OneofAccessor 43b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer { 44b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer private readonly Func<IMessage, int> caseDelegate; 45b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer private readonly Action<IMessage> clearDelegate; 46b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer private OneofDescriptor descriptor; 47b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer 48b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer internal OneofAccessor(PropertyInfo caseProperty, MethodInfo clearMethod, OneofDescriptor descriptor) 49b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer { 50b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer if (!caseProperty.CanRead) 51b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer { 52b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer throw new ArgumentException("Cannot read from property"); 53b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer } 54b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer this.descriptor = descriptor; 55b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer caseDelegate = ReflectionUtil.CreateFuncIMessageT<int>(caseProperty.GetGetMethod()); 56b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer 57b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer this.descriptor = descriptor; 58b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer clearDelegate = ReflectionUtil.CreateActionIMessage(clearMethod); 59b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer } 60b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer 61b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// <summary> 62b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// Gets the descriptor for this oneof. 63b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// </summary> 64b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// <value> 65b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// The descriptor of the oneof. 66b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// </value> 67b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer public OneofDescriptor Descriptor { get { return descriptor; } } 68b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer 69b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// <summary> 70b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// Clears the oneof in the specified message. 71b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// </summary> 72b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer public void Clear(IMessage message) 73b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer { 74b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer clearDelegate(message); 75b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer } 76b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer 77b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// <summary> 78b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// Indicates which field in the oneof is set for specified message 79b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer /// </summary> 80b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer public FieldDescriptor GetCaseFieldDescriptor(IMessage message) 81b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer { 82b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer int fieldNumber = caseDelegate(message); 83b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer if (fieldNumber > 0) 84b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer { 85b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer return descriptor.ContainingType.FindFieldByNumber(fieldNumber); 86b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer } 87b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer return null; 88b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer } 89b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer } 90b0575e93e4c39dec69365b850088a1eb7f82c5b3Tamas Berghammer} 91