[8295] | 1 | // Protocol Buffers - Google's data interchange format
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| 2 | // Copyright 2008 Google Inc. All rights reserved.
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| 3 | // http://github.com/jskeet/dotnet-protobufs/
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| 4 | // Original C++/Java/Python code:
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| 5 | // http://code.google.com/p/protobuf/
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| 6 | //
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| 7 | // Redistribution and use in source and binary forms, with or without
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| 8 | // modification, are permitted provided that the following conditions are
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| 9 | // met:
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| 10 | //
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| 11 | // * Redistributions of source code must retain the above copyright
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| 12 | // notice, this list of conditions and the following disclaimer.
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| 13 | // * Redistributions in binary form must reproduce the above
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| 14 | // copyright notice, this list of conditions and the following disclaimer
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| 15 | // in the documentation and/or other materials provided with the
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| 16 | // distribution.
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| 17 | // * Neither the name of Google Inc. nor the names of its
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| 18 | // contributors may be used to endorse or promote products derived from
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| 19 | // this software without specific prior written permission.
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| 20 | //
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| 21 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 22 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 23 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 24 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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| 25 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 26 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 27 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 28 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 29 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 30 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 31 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 32 | using System;
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| 33 | using System.Reflection;
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| 34 |
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| 35 | namespace Google.ProtocolBuffers.FieldAccess
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| 36 | {
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| 37 | /// <summary>
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| 38 | /// Access for a non-repeated field of a "primitive" type (i.e. not another message or an enum).
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| 39 | /// </summary>
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| 40 | internal class SinglePrimitiveAccessor<TMessage, TBuilder> : IFieldAccessor<TMessage, TBuilder>
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| 41 | where TMessage : IMessage<TMessage, TBuilder>
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| 42 | where TBuilder : IBuilder<TMessage, TBuilder>
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| 43 | {
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| 44 | private readonly Type clrType;
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| 45 | private readonly Func<TMessage, object> getValueDelegate;
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| 46 | private readonly Action<TBuilder, object> setValueDelegate;
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| 47 | private readonly Func<TMessage, bool> hasDelegate;
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| 48 | private readonly Func<TBuilder, IBuilder> clearDelegate;
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| 49 |
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| 50 | internal static readonly Type[] EmptyTypes = new Type[0];
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| 51 |
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| 52 | /// <summary>
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| 53 | /// The CLR type of the field (int, the enum type, ByteString, the message etc).
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| 54 | /// As declared by the property.
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| 55 | /// </summary>
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| 56 | protected Type ClrType
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| 57 | {
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| 58 | get { return clrType; }
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| 59 | }
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| 60 |
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| 61 | internal SinglePrimitiveAccessor(string name)
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| 62 | {
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| 63 | PropertyInfo messageProperty = typeof (TMessage).GetProperty(name);
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| 64 | PropertyInfo builderProperty = typeof (TBuilder).GetProperty(name);
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| 65 | if (builderProperty == null)
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| 66 | {
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| 67 | builderProperty = typeof (TBuilder).GetProperty(name);
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| 68 | }
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| 69 | PropertyInfo hasProperty = typeof (TMessage).GetProperty("Has" + name);
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| 70 | MethodInfo clearMethod = typeof (TBuilder).GetMethod("Clear" + name, EmptyTypes);
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| 71 | if (messageProperty == null || builderProperty == null || hasProperty == null || clearMethod == null)
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| 72 | {
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| 73 | throw new ArgumentException("Not all required properties/methods available");
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| 74 | }
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| 75 | clrType = messageProperty.PropertyType;
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| 76 | hasDelegate =
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| 77 | (Func<TMessage, bool>)
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| 78 | Delegate.CreateDelegate(typeof (Func<TMessage, bool>), null, hasProperty.GetGetMethod());
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| 79 | clearDelegate =
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| 80 | (Func<TBuilder, IBuilder>) Delegate.CreateDelegate(typeof (Func<TBuilder, IBuilder>), null, clearMethod);
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| 81 | getValueDelegate = ReflectionUtil.CreateUpcastDelegate<TMessage>(messageProperty.GetGetMethod());
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| 82 | setValueDelegate = ReflectionUtil.CreateDowncastDelegate<TBuilder>(builderProperty.GetSetMethod());
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| 83 | }
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| 84 |
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| 85 | public bool Has(TMessage message)
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| 86 | {
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| 87 | return hasDelegate(message);
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| 88 | }
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| 89 |
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| 90 | public void Clear(TBuilder builder)
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| 91 | {
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| 92 | clearDelegate(builder);
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| 93 | }
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| 94 |
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| 95 | /// <summary>
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| 96 | /// Only valid for message types - this implementation throws InvalidOperationException.
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| 97 | /// </summary>
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| 98 | public virtual IBuilder CreateBuilder()
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| 99 | {
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| 100 | throw new InvalidOperationException();
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| 101 | }
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| 102 |
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| 103 | public virtual object GetValue(TMessage message)
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| 104 | {
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| 105 | return getValueDelegate(message);
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| 106 | }
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| 107 |
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| 108 | public virtual void SetValue(TBuilder builder, object value)
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| 109 | {
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| 110 | setValueDelegate(builder, value);
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| 111 | }
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| 112 |
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| 113 | #region Methods only related to repeated values
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| 114 |
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| 115 | public int GetRepeatedCount(TMessage message)
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| 116 | {
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| 117 | throw new InvalidOperationException();
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| 118 | }
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| 119 |
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| 120 | public object GetRepeatedValue(TMessage message, int index)
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| 121 | {
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| 122 | throw new InvalidOperationException();
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| 123 | }
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| 124 |
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| 125 | public void SetRepeated(TBuilder builder, int index, object value)
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| 126 | {
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| 127 | throw new InvalidOperationException();
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| 128 | }
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| 129 |
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| 130 | public void AddRepeated(TBuilder builder, object value)
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| 131 | {
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| 132 | throw new InvalidOperationException();
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| 133 | }
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| 134 |
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| 135 | public object GetRepeatedWrapper(TBuilder builder)
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| 136 | {
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| 137 | throw new InvalidOperationException();
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| 138 | }
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| 139 |
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| 140 | #endregion
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| 141 | }
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| 142 | } |
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