90 lines
3.1 KiB
C#
90 lines
3.1 KiB
C#
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#if !NO_RUNTIME
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#if PORTABLE
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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namespace ProtoBuf.Serializers
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{
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/// <summary>
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/// Manipulates with uris via reflection rather than strongly typed objects.
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/// This is because in PCLs, the Uri type may not match (WinRT uses Internal/Uri, .Net uses System/Uri)
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/// </summary>
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sealed class ReflectedUriDecorator : ProtoDecoratorBase
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{
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private readonly Type expectedType;
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private readonly PropertyInfo absoluteUriProperty;
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private readonly ConstructorInfo typeConstructor;
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public ReflectedUriDecorator(Type type, ProtoBuf.Meta.TypeModel model, IProtoSerializer tail) : base(tail)
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{
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expectedType = type;
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#if PROFILE259
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absoluteUriProperty = expectedType.GetRuntimeProperty("AbsoluteUri");
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IEnumerable<ConstructorInfo> constructors = expectedType.GetTypeInfo().DeclaredConstructors;
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typeConstructor = null;
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foreach(ConstructorInfo constructor in constructors)
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{
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ParameterInfo[] parameters = constructor.GetParameters();
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ParameterInfo parameterFirst = parameters.FirstOrDefault();
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Type stringType = typeof(string);
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if (parameterFirst != null &&
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parameterFirst.ParameterType == stringType)
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{
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typeConstructor = constructor;
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break;
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}
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}
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#else
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absoluteUriProperty = expectedType.GetProperty("AbsoluteUri");
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typeConstructor = expectedType.GetConstructor(new Type[] { typeof(string) });
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#endif
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}
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public override Type ExpectedType { get { return expectedType; } }
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public override bool RequiresOldValue { get { return false; } }
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public override bool ReturnsValue { get { return true; } }
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public override void Write(object value, ProtoWriter dest)
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{
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Tail.Write(absoluteUriProperty.GetValue(value, null), dest);
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}
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public override object Read(object value, ProtoReader source)
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{
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Helpers.DebugAssert(value == null); // not expecting incoming
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string s = (string)Tail.Read(null, source);
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return s.Length == 0 ? null : typeConstructor.Invoke(new object[] { s });
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}
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#if FEAT_COMPILER
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protected override void EmitWrite(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
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{
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ctx.LoadValue(valueFrom);
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ctx.LoadValue(absoluteUriProperty);
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Tail.EmitWrite(ctx, null);
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}
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protected override void EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
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{
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Tail.EmitRead(ctx, valueFrom);
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ctx.CopyValue();
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Compiler.CodeLabel @nonEmpty = ctx.DefineLabel(), @end = ctx.DefineLabel();
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ctx.LoadValue(typeof(string).GetProperty("Length"));
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ctx.BranchIfTrue(@nonEmpty, true);
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ctx.DiscardValue();
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ctx.LoadNullRef();
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ctx.Branch(@end, true);
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ctx.MarkLabel(@nonEmpty);
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ctx.EmitCtor(expectedType, ctx.MapType(typeof(string)));
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ctx.MarkLabel(@end);
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}
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#endif
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}
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}
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#endif
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#endif
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