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270
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1 using System;
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2 using System.Collections.Generic;
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3 using System.Linq;
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4 using System.Text;
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5 using System.Text.RegularExpressions;
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6 using Implab.Diagnostics;
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7
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8 namespace Implab.ServiceHost.Unity
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9 {
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10 using static Trace<TypeResolver>;
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11 public class TypeResolver
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12 {
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13 readonly Dictionary<string, Type> m_cache = new Dictionary<string, Type>();
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14
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15 Regex _nsRx = new Regex(@"^\w+(\.\w+)*$", RegexOptions.Compiled);
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16 readonly LinkedList<string> m_namespases = new LinkedList<string>();
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17
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18 LinkedListNode<string> m_insertAt;
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19
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20 readonly TypeResolver m_parent;
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21
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22 public TypeResolver() : this(null) {
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23
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24 }
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25
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26 public TypeResolver(TypeResolver parent) {
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272
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27 m_parent = parent;
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270
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28 m_insertAt = new LinkedListNode<string>(string.Empty);
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29 m_namespases.AddFirst(m_insertAt);
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30 }
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31
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32 public void AddNamespace(string ns) {
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33 Safe.ArgumentMatch(ns, nameof(ns), _nsRx);
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34 if (m_insertAt != null)
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35 m_namespases.AddAfter(m_insertAt, ns);
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36 else
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37 m_namespases.AddFirst(ns);
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38 }
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39
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40 public void AddMapping(string typeName, Type type) {
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41 Safe.ArgumentNotEmpty(typeName, nameof(typeName));
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42 Safe.ArgumentNotNull(type, nameof(type));
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43
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44 m_cache[typeName] = type;
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45 }
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46
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47 public Type Resolve(TypeReference reference) {
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48 var args = reference.IsGeneric && !reference.IsOpenGeneric ? reference.GenericParameters?.Select(Resolve).ToArray() : null;
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49 var argc = reference.IsGeneric ? reference.GenericParameters.Length : 0;
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50
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51 Type resolved;
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52 if(!m_cache.TryGetValue(reference.ToString(), out resolved)) {
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53 resolved = ResolveInternal(reference, args, argc);
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54 if (resolved == null)
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55 throw new Exception($"Failed to resolve {reference}");
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56 m_cache[reference.ToString()] = resolved;
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57 }
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58
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59 return resolved;
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60 }
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61
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272
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62 public Type Resolve(string typeSpec) {
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63 return Resolve(TypeReference.Parse(typeSpec));
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64 }
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65
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270
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66 Type ResolveInternal(TypeReference reference, Type[] args, int argc) {
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67 var resolved = ProbeInNamespaces(
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68 String.Join(".", new [] { reference.Namespace, reference.TypeName }.Where(x => !string.IsNullOrEmpty(x)) ),
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69 args,
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70 argc,
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71 reference.IsArray,
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72 reference.ToString()
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73 );
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74
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75 if (resolved == null && m_parent != null)
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76 resolved = m_parent.Resolve(reference);
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77
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78 return resolved;
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79 }
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80
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81 public Type ProbeInNamespaces(string localName, Type[] args, int argc, bool isArray, string referenceName) {
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82 foreach (var ns in m_namespases) {
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83 var typeName = FormatName(new [] { ns, localName}, argc, args, isArray);
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84
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85 var resolved = Probe(typeName);
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86 if (resolved != null) {
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87 Log("Probe succeed {0} in '{1}': {2} -> {3}", referenceName, ns, typeName, resolved.AssemblyQualifiedName);
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88 return resolved;
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89 } else {
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90 Log("Probe failed {0} in '{1}': {2}", referenceName, ns, typeName);
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91 }
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92 }
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93
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94 return null;
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95 }
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96
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97 Type Probe(string typeName) {
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98 var assemblies = AppDomain.CurrentDomain.GetAssemblies();
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99
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100 foreach(var assembly in assemblies) {
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101 var type = assembly.GetType(typeName);
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102 if (type != null)
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103 return type;
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104 }
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105 return null;
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106 }
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107
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108 string FormatName(string[] parts, int argc, Type[] args, bool isArray) {
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109 var builder = new StringBuilder();
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110
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111 builder.Append(String.Join(".", parts.Where(x => !string.IsNullOrEmpty(x))));
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112 if (argc > 0) {
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113 builder.Append('`');
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114 builder.Append(argc);
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115 }
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116
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117 if (args!= null && args.Length > 0) {
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118 builder.Append('[');
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119 builder.Append(string.Join(",", args.Select(x => $"[{x.AssemblyQualifiedName}]")));
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120 builder.Append(']');
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121 }
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122
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123 if(isArray)
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124 builder.Append("[]");
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125
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126 return builder.ToString();
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127 }
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128 }
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129 } |
