[8295] | 1 | #region Copyright notice and license
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| 2 |
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| 3 | // Protocol Buffers - Google's data interchange format
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| 4 | // Copyright 2008 Google Inc. All rights reserved.
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| 5 | // http://github.com/jskeet/dotnet-protobufs/
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| 6 | // Original C++/Java/Python code:
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| 7 | // http://code.google.com/p/protobuf/
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| 8 | //
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| 9 | // Redistribution and use in source and binary forms, with or without
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| 10 | // modification, are permitted provided that the following conditions are
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| 11 | // met:
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| 12 | //
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| 13 | // * Redistributions of source code must retain the above copyright
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| 14 | // notice, this list of conditions and the following disclaimer.
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| 15 | // * Redistributions in binary form must reproduce the above
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| 16 | // copyright notice, this list of conditions and the following disclaimer
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| 17 | // in the documentation and/or other materials provided with the
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| 18 | // distribution.
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| 19 | // * Neither the name of Google Inc. nor the names of its
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| 20 | // contributors may be used to endorse or promote products derived from
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| 21 | // this software without specific prior written permission.
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| 22 | //
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| 23 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 24 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 25 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 26 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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| 27 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 28 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 29 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 30 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 31 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 32 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 33 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 34 |
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| 35 | #endregion
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| 36 |
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| 37 | using System.Collections;
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| 38 | using System.Collections.Generic;
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| 39 | using Google.ProtocolBuffers.Descriptors;
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| 40 |
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| 41 | namespace Google.ProtocolBuffers
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| 42 | {
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| 43 | public interface IGeneratedExtensionLite
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| 44 | {
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| 45 | int Number { get; }
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| 46 | object ContainingType { get; }
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| 47 | IMessageLite MessageDefaultInstance { get; }
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| 48 | IFieldDescriptorLite Descriptor { get; }
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| 49 | }
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| 50 |
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| 51 | public class ExtensionDescriptorLite : IFieldDescriptorLite
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| 52 | {
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| 53 | private readonly string fullName;
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| 54 | private readonly IEnumLiteMap enumTypeMap;
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| 55 | private readonly int number;
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| 56 | private readonly FieldType type;
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| 57 | private readonly bool isRepeated;
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| 58 | private readonly bool isPacked;
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| 59 | private readonly MappedType mapType;
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| 60 | private readonly object defaultValue;
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| 61 |
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| 62 | public ExtensionDescriptorLite(string fullName, IEnumLiteMap enumTypeMap, int number, FieldType type,
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| 63 | object defaultValue, bool isRepeated, bool isPacked)
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| 64 | {
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| 65 | this.fullName = fullName;
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| 66 | this.enumTypeMap = enumTypeMap;
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| 67 | this.number = number;
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| 68 | this.type = type;
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| 69 | this.mapType = FieldMappingAttribute.MappedTypeFromFieldType(type);
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| 70 | this.isRepeated = isRepeated;
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| 71 | this.isPacked = isPacked;
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| 72 | this.defaultValue = defaultValue;
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| 73 | }
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| 74 |
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| 75 | public string Name
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| 76 | {
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| 77 | get
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| 78 | {
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| 79 | string name = fullName;
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| 80 | int offset = name.LastIndexOf('.');
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| 81 | if (offset >= 0)
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| 82 | {
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| 83 | name = name.Substring(offset);
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| 84 | }
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| 85 | return name;
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| 86 | }
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| 87 | }
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| 88 |
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| 89 | public string FullName
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| 90 | {
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| 91 | get { return fullName; }
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| 92 | }
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| 93 |
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| 94 | public bool IsRepeated
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| 95 | {
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| 96 | get { return isRepeated; }
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| 97 | }
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| 98 |
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| 99 | public bool IsRequired
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| 100 | {
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| 101 | get { return false; }
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| 102 | }
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| 103 |
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| 104 | public bool IsPacked
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| 105 | {
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| 106 | get { return isPacked; }
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| 107 | }
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| 108 |
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| 109 | public bool IsExtension
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| 110 | {
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| 111 | get { return true; }
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| 112 | }
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| 113 |
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| 114 | /// <summary>
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| 115 | /// This is not supported and assertions are made to ensure this does not exist on extensions of Lite types
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| 116 | /// </summary>
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| 117 | public bool MessageSetWireFormat
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| 118 | {
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| 119 | get { return false; }
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| 120 | }
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| 121 |
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| 122 | public int FieldNumber
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| 123 | {
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| 124 | get { return number; }
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| 125 | }
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| 126 |
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| 127 | public IEnumLiteMap EnumType
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| 128 | {
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| 129 | get { return enumTypeMap; }
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| 130 | }
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| 131 |
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| 132 | public FieldType FieldType
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| 133 | {
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| 134 | get { return type; }
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| 135 | }
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| 136 |
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| 137 | public MappedType MappedType
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| 138 | {
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| 139 | get { return mapType; }
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| 140 | }
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| 141 |
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| 142 | public object DefaultValue
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| 143 | {
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| 144 | get { return defaultValue; }
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| 145 | }
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| 146 |
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| 147 | public int CompareTo(IFieldDescriptorLite other)
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| 148 | {
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| 149 | return FieldNumber.CompareTo(other.FieldNumber);
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| 150 | }
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| 151 | }
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| 152 |
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| 153 | public class GeneratedRepeatExtensionLite<TContainingType, TExtensionType> :
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| 154 | GeneratedExtensionLite<TContainingType, IList<TExtensionType>>
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| 155 | where TContainingType : IMessageLite
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| 156 | {
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| 157 | public GeneratedRepeatExtensionLite(string fullName, TContainingType containingTypeDefaultInstance,
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| 158 | IMessageLite messageDefaultInstance, IEnumLiteMap enumTypeMap, int number,
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| 159 | FieldType type, bool isPacked) :
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| 160 | base(
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| 161 | fullName, containingTypeDefaultInstance, new List<TExtensionType>(),
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| 162 | messageDefaultInstance, enumTypeMap, number, type, isPacked)
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| 163 | {
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| 164 | }
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| 165 |
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| 166 | public override object ToReflectionType(object value)
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| 167 | {
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| 168 | IList<object> result = new List<object>();
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| 169 | foreach (object element in (IEnumerable) value)
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| 170 | {
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| 171 | result.Add(SingularToReflectionType(element));
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| 172 | }
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| 173 | return result;
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| 174 | }
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| 175 |
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| 176 | public override object FromReflectionType(object value)
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| 177 | {
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| 178 | // Must convert the whole list.
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| 179 | List<TExtensionType> result = new List<TExtensionType>();
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| 180 | foreach (object element in (IEnumerable) value)
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| 181 | {
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| 182 | result.Add((TExtensionType) SingularFromReflectionType(element));
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| 183 | }
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| 184 | return result;
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| 185 | }
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| 186 | }
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| 187 |
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| 188 | public class GeneratedExtensionLite<TContainingType, TExtensionType> : IGeneratedExtensionLite
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| 189 | where TContainingType : IMessageLite
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| 190 | {
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| 191 | private readonly TContainingType containingTypeDefaultInstance;
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| 192 | private readonly TExtensionType defaultValue;
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| 193 | private readonly IMessageLite messageDefaultInstance;
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| 194 | private readonly ExtensionDescriptorLite descriptor;
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| 195 |
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| 196 | // We can't always initialize a GeneratedExtension when we first construct
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| 197 | // it due to initialization order difficulties (namely, the default
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| 198 | // instances may not have been constructed yet). So, we construct an
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| 199 | // uninitialized GeneratedExtension once, then call internalInit() on it
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| 200 | // later. Generated code will always call internalInit() on all extensions
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| 201 | // as part of the static initialization code, and internalInit() throws an
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| 202 | // exception if called more than once, so this method is useless to users.
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| 203 | protected GeneratedExtensionLite(
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| 204 | TContainingType containingTypeDefaultInstance,
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| 205 | TExtensionType defaultValue,
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| 206 | IMessageLite messageDefaultInstance,
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| 207 | ExtensionDescriptorLite descriptor)
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| 208 | {
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| 209 | this.containingTypeDefaultInstance = containingTypeDefaultInstance;
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| 210 | this.messageDefaultInstance = messageDefaultInstance;
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| 211 | this.defaultValue = defaultValue;
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| 212 | this.descriptor = descriptor;
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| 213 | }
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| 214 |
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| 215 | /** For use by generated code only. */
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| 216 |
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| 217 | public GeneratedExtensionLite(
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| 218 | string fullName,
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| 219 | TContainingType containingTypeDefaultInstance,
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| 220 | TExtensionType defaultValue,
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| 221 | IMessageLite messageDefaultInstance,
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| 222 | IEnumLiteMap enumTypeMap,
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| 223 | int number,
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| 224 | FieldType type)
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| 225 | : this(containingTypeDefaultInstance, defaultValue, messageDefaultInstance,
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| 226 | new ExtensionDescriptorLite(fullName, enumTypeMap, number, type, defaultValue,
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| 227 | false /* isRepeated */, false /* isPacked */))
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| 228 | {
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| 229 | }
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| 230 |
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| 231 | private static readonly IList<object> Empty = new object[0];
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| 232 | /** Repeating fields: For use by generated code only. */
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| 233 |
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| 234 | protected GeneratedExtensionLite(
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| 235 | string fullName,
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| 236 | TContainingType containingTypeDefaultInstance,
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| 237 | TExtensionType defaultValue,
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| 238 | IMessageLite messageDefaultInstance,
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| 239 | IEnumLiteMap enumTypeMap,
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| 240 | int number,
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| 241 | FieldType type,
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| 242 | bool isPacked)
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| 243 | : this(containingTypeDefaultInstance, defaultValue, messageDefaultInstance,
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| 244 | new ExtensionDescriptorLite(fullName, enumTypeMap, number, type, Empty,
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| 245 | true /* isRepeated */, isPacked))
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| 246 | {
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| 247 | }
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| 248 |
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| 249 | /// <summary>
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| 250 | /// Returns information about this extension
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| 251 | /// </summary>
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| 252 | public IFieldDescriptorLite Descriptor
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| 253 | {
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| 254 | get { return descriptor; }
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| 255 | }
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| 256 |
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| 257 | /// <summary>
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| 258 | /// Returns the default value for this extension
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| 259 | /// </summary>
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| 260 | public TExtensionType DefaultValue
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| 261 | {
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| 262 | get { return defaultValue; }
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| 263 | }
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| 264 |
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| 265 | /// <summary>
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| 266 | /// used for the extension registry
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| 267 | /// </summary>
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| 268 | object IGeneratedExtensionLite.ContainingType
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| 269 | {
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| 270 | get { return ContainingTypeDefaultInstance; }
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| 271 | }
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| 272 |
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| 273 | /**
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| 274 | * Default instance of the type being extended, used to identify that type.
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| 275 | */
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| 276 |
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| 277 | public TContainingType ContainingTypeDefaultInstance
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| 278 | {
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| 279 | get { return containingTypeDefaultInstance; }
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| 280 | }
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| 281 |
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| 282 | /** Get the field number. */
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| 283 |
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| 284 | public int Number
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| 285 | {
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| 286 | get { return descriptor.FieldNumber; }
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| 287 | }
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| 288 |
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| 289 | /**
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| 290 | * If the extension is an embedded message, this is the default instance of
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| 291 | * that type.
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| 292 | */
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| 293 |
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| 294 | public IMessageLite MessageDefaultInstance
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| 295 | {
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| 296 | get { return messageDefaultInstance; }
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| 297 | }
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| 298 |
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| 299 | /// <summary>
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| 300 | /// Converts from the type used by the native accessors to the type
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| 301 | /// used by reflection accessors. For example, the reflection accessors
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| 302 | /// for enums use EnumValueDescriptors but the native accessors use
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| 303 | /// the generated enum type.
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| 304 | /// </summary>
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| 305 | public virtual object ToReflectionType(object value)
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| 306 | {
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| 307 | return SingularToReflectionType(value);
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| 308 | }
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| 309 |
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| 310 | /// <summary>
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| 311 | /// Like ToReflectionType(object) but for a single element.
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| 312 | /// </summary>
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| 313 | public object SingularToReflectionType(object value)
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| 314 | {
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| 315 | return descriptor.MappedType == MappedType.Enum
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| 316 | ? descriptor.EnumType.FindValueByNumber((int) value)
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| 317 | : value;
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| 318 | }
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| 319 |
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| 320 | public virtual object FromReflectionType(object value)
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| 321 | {
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| 322 | return SingularFromReflectionType(value);
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| 323 | }
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| 324 |
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| 325 | public object SingularFromReflectionType(object value)
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| 326 | {
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| 327 | switch (Descriptor.MappedType)
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| 328 | {
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| 329 | case MappedType.Message:
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| 330 | if (value is TExtensionType)
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| 331 | {
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| 332 | return value;
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| 333 | }
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| 334 | else
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| 335 | {
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| 336 | // It seems the copy of the embedded message stored inside the
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| 337 | // extended message is not of the exact type the user was
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| 338 | // expecting. This can happen if a user defines a
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| 339 | // GeneratedExtension manually and gives it a different type.
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| 340 | // This should not happen in normal use. But, to be nice, we'll
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| 341 | // copy the message to whatever type the caller was expecting.
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| 342 | return MessageDefaultInstance.WeakCreateBuilderForType()
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| 343 | .WeakMergeFrom((IMessageLite) value).WeakBuild();
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| 344 | }
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| 345 | case MappedType.Enum:
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| 346 | // Just return a boxed int - that can be unboxed to the enum
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| 347 | IEnumLite enumValue = (IEnumLite) value;
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| 348 | return enumValue.Number;
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| 349 | default:
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| 350 | return value;
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| 351 | }
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| 352 | }
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| 353 | }
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| 354 | } |
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