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comparison Implab.ServiceHost/Unity/TypeResolutionContext.cs @ 278:6691aff01de1 v3

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Implab: added XmlDefaultSeializer (SerializersPool is now obsolete) Implab.ServiceHost: rewritten TypeReference (added support for nested types), stable API
author cin
date Thu, 03 May 2018 09:59:44 +0300
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277:963b17c275be 278:6691aff01de1
1 using System;
2 using System.Collections.Generic;
3 using Implab.Diagnostics;
4
5 namespace Implab.ServiceHost.Unity {
6 using static Trace<TypeResolver>;
7
8 /// <summary>
9 /// Позволяет обойти вложенные типы и собрать цеочку из типов и параметров генериков, которые они предлагают
10 /// </summary>
11 internal class TypeResolutionContext {
12 readonly TypeResolver m_resolver;
13
14
15 readonly List<Type> m_genericParameters = new List<Type>();
16
17 public IEnumerable<Type> GenericParameters { get { return m_genericParameters; } }
18
19 public Type ResolvedType { get; private set; }
20
21
22 public int ArrayRank { get; private set; }
23
24
25 public bool ThrowOnFail { get; private set; }
26
27 public TypeResolutionContext(TypeResolver resolver, bool throwOnFail) {
28 m_resolver = resolver;
29 ThrowOnFail = throwOnFail;
30 }
31
32 public Type MakeType() {
33 return m_genericParameters.Count > 0 ?
34 ResolvedType?.MakeGenericType(m_genericParameters.ToArray()) :
35 ResolvedType;
36 }
37
38 public void Visit(SpecializedTypeReference typeReference) {
39 typeReference.GenericType.Visit(this);
40
41 if (ResolvedType != null) {
42 foreach (var genericParamRef in typeReference.GenericParameters) {
43 var context = new TypeResolutionContext(m_resolver, ThrowOnFail);
44 genericParamRef.Visit(context);
45 m_genericParameters.Add(context.MakeType());
46 }
47 }
48 }
49
50 public void Visit(NestedTypeReference typeReference) {
51 typeReference.DeclaringType.Visit(this);
52 if (ResolvedType != null)
53 ResolvedType = ResolvedType?.GetNestedType(typeReference.ClrName) ?? Failed(typeReference);
54 }
55
56 public void Visit(RootTypeReference typeReference) {
57 ResolvedType = m_resolver.Resolve(typeReference.Namespace, typeReference.ClrName) ?? Failed(typeReference);
58 }
59
60 public void Visit(ArrayTypeReference typeReference) {
61 var context = new TypeResolutionContext(m_resolver, ThrowOnFail);
62 typeReference.ItemsType.Visit(context);
63 ResolvedType = typeReference.Rank == 1 ?
64 context.MakeType()?.MakeArrayType() :
65 context.MakeType()?.MakeArrayType(typeReference.Rank);
66 }
67
68 Type Failed(TypeReference reference) {
69 Log($"Falied to resolve {reference}");
70 if (ThrowOnFail)
71 throw new Exception($"Failed to resolve {reference}");
72 return null;
73 }
74 }
75 }