| #region Copyright notice and license |
| // Protocol Buffers - Google's data interchange format |
| // Copyright 2008 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, |
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| // (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.Collections.ObjectModel; |
| |
| namespace Google.Protobuf.Reflection |
| { |
| /// <summary> |
| /// Provides access to fields in generated messages via reflection. |
| /// </summary> |
| public sealed class FieldAccessorTable |
| { |
| private readonly ReadOnlyCollection<IFieldAccessor> accessors; |
| private readonly ReadOnlyCollection<OneofAccessor> oneofs; |
| private readonly MessageDescriptor descriptor; |
| |
| /// <summary> |
| /// Constructs a FieldAccessorTable for a particular message class. |
| /// Only one FieldAccessorTable should be constructed per class. |
| /// </summary> |
| /// <param name="type">The CLR type for the message.</param> |
| /// <param name="descriptor">The type's descriptor</param> |
| /// <param name="propertyNames">The Pascal-case names of all the field-based properties in the message.</param> |
| public FieldAccessorTable(Type type, MessageDescriptor descriptor, string[] propertyNames, string[] oneofPropertyNames) |
| { |
| this.descriptor = descriptor; |
| var accessorsArray = new IFieldAccessor[descriptor.Fields.Count]; |
| for (int i = 0; i < accessorsArray.Length; i++) |
| { |
| var field = descriptor.Fields[i]; |
| var name = propertyNames[i]; |
| accessorsArray[i] = |
| field.IsMap ? new MapFieldAccessor(type, name, field) |
| : field.IsRepeated ? new RepeatedFieldAccessor(type, name, field) |
| : (IFieldAccessor) new SingleFieldAccessor(type, name, field); |
| } |
| accessors = new ReadOnlyCollection<IFieldAccessor>(accessorsArray); |
| var oneofsArray = new OneofAccessor[descriptor.Oneofs.Count]; |
| for (int i = 0; i < oneofsArray.Length; i++) |
| { |
| var oneof = descriptor.Oneofs[i]; |
| oneofsArray[i] = new OneofAccessor(type, oneofPropertyNames[i], oneof); |
| } |
| oneofs = new ReadOnlyCollection<OneofAccessor>(oneofsArray); |
| } |
| |
| // TODO: Validate the name here... should possibly make this type a more "general reflection access" type, |
| // bearing in mind the oneof parts to come as well. |
| /// <summary> |
| /// Returns all of the field accessors for the message type. |
| /// </summary> |
| public ReadOnlyCollection<IFieldAccessor> Accessors { get { return accessors; } } |
| |
| public ReadOnlyCollection<OneofAccessor> Oneofs { get { return oneofs; } } |
| |
| // TODO: Review this, as it's easy to get confused between FieldNumber and Index. |
| // Currently only used to get an accessor related to a oneof... maybe just make that simpler? |
| public IFieldAccessor this[int fieldNumber] |
| { |
| get |
| { |
| FieldDescriptor field = descriptor.FindFieldByNumber(fieldNumber); |
| return accessors[field.Index]; |
| } |
| } |
| } |
| } |