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annotate Implab.ServiceHost/Unity/TypeResolutionContext.cs @ 280:f07be402ab02 v3

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Added Trace<T>.Debug(...) method for debug messages Added ContainerBuilde.LoadConfig(Uri) method
author cin
date Fri, 25 May 2018 19:15:26 +0300
parents 6691aff01de1
children
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1 using System;
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2 using System.Collections.Generic;
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3 using Implab.Diagnostics;
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4
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5 namespace Implab.ServiceHost.Unity {
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6 using static Trace<TypeResolver>;
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7
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8 /// <summary>
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9 /// Позволяет обойти вложенные типы и собрать цеочку из типов и параметров генериков, которые они предлагают
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10 /// </summary>
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11 internal class TypeResolutionContext {
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12 readonly TypeResolver m_resolver;
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14
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15 readonly List<Type> m_genericParameters = new List<Type>();
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16
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17 public IEnumerable<Type> GenericParameters { get { return m_genericParameters; } }
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18
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19 public Type ResolvedType { get; private set; }
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21
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22 public int ArrayRank { get; private set; }
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24
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25 public bool ThrowOnFail { get; private set; }
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26
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27 public TypeResolutionContext(TypeResolver resolver, bool throwOnFail) {
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28 m_resolver = resolver;
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29 ThrowOnFail = throwOnFail;
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30 }
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31
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32 public Type MakeType() {
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33 return m_genericParameters.Count > 0 ?
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34 ResolvedType?.MakeGenericType(m_genericParameters.ToArray()) :
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35 ResolvedType;
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36 }
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37
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38 public void Visit(SpecializedTypeReference typeReference) {
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39 typeReference.GenericType.Visit(this);
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40
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41 if (ResolvedType != null) {
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42 foreach (var genericParamRef in typeReference.GenericParameters) {
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43 var context = new TypeResolutionContext(m_resolver, ThrowOnFail);
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44 genericParamRef.Visit(context);
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45 m_genericParameters.Add(context.MakeType());
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46 }
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47 }
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48 }
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49
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50 public void Visit(NestedTypeReference typeReference) {
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51 typeReference.DeclaringType.Visit(this);
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52 if (ResolvedType != null)
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53 ResolvedType = ResolvedType?.GetNestedType(typeReference.ClrName) ?? Failed(typeReference);
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54 }
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55
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56 public void Visit(RootTypeReference typeReference) {
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57 ResolvedType = m_resolver.Resolve(typeReference.Namespace, typeReference.ClrName) ?? Failed(typeReference);
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58 }
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59
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60 public void Visit(ArrayTypeReference typeReference) {
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61 var context = new TypeResolutionContext(m_resolver, ThrowOnFail);
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62 typeReference.ItemsType.Visit(context);
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63 ResolvedType = typeReference.Rank == 1 ?
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64 context.MakeType()?.MakeArrayType() :
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65 context.MakeType()?.MakeArrayType(typeReference.Rank);
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66 }
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67
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68 Type Failed(TypeReference reference) {
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69 Log($"Falied to resolve {reference}");
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70 if (ThrowOnFail)
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71 throw new Exception($"Failed to resolve {reference}");
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72 return null;
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73 }
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74 }
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75 }