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annotate Implab.ServiceHost/Unity/TypeResolver.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 8714471e8d78
children
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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 using System.Diagnostics;
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10 using static Trace<TypeResolver>;
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11 public class TypeResolver {
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12 readonly Dictionary<string, Type> m_cache = new Dictionary<string, Type>();
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13
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14 Regex _nsRx = new Regex(@"^\w+(\.\w+)*$", RegexOptions.Compiled);
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15 readonly LinkedList<string> m_namespases = new LinkedList<string>();
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16
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17 internal Type Resolve(string ns, string typeName) {
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18 var fullName = string.IsNullOrEmpty(ns) ? typeName : $"{ns}.{typeName}";
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20 return ProbeInNamespaces(fullName);
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21 }
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22
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23 public Type Resolve(TypeReference typeReference, bool throwOnFail) {
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24 var context = new TypeResolutionContext(this, throwOnFail);
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25 typeReference.Visit(context);
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26 return context.MakeType();
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27 }
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29 public Type Resolve(string typeSpec, bool throwOnFail) {
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30 Safe.ArgumentNotEmpty(typeSpec, nameof(typeSpec));
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31 var typeReference = TypeReference.Parse(typeSpec);
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32 return Resolve(typeReference, throwOnFail);
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33 }
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34
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35 LinkedListNode<string> m_insertAt;
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36
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37 readonly TypeResolver m_parent;
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39 public TypeResolver() : this(null) {
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40 }
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41
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42 public TypeResolver(TypeResolver parent) {
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43 m_parent = parent;
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44 m_insertAt = new LinkedListNode<string>(string.Empty);
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45 m_namespases.AddFirst(m_insertAt);
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46 }
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47
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48 public void AddNamespace(string ns) {
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49 Safe.ArgumentMatch(ns, nameof(ns), _nsRx);
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50 if (m_insertAt != null)
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51 m_namespases.AddAfter(m_insertAt, ns);
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52 else
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53 m_namespases.AddFirst(ns);
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54 }
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55
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56 public void AddMapping(string typeName, Type type) {
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57 Safe.ArgumentNotEmpty(typeName, nameof(typeName));
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58 Safe.ArgumentNotNull(type, nameof(type));
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59
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60 m_cache[typeName] = type;
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61 }
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62
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63 Type ProbeInNamespaces(string localName) {
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65 Type resolved;
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66 if (!m_cache.TryGetValue(localName, out resolved)) {
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67 foreach (var ns in m_namespases) {
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68 var typeName = string.IsNullOrEmpty(ns) ? localName : $"{ns}.{localName}";
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69 resolved = Probe(typeName);
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70 if (resolved != null) {
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71 Log($"Probe '{localName}' -> '{resolved.FullName}'");
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72 break;
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73 }
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74 }
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76 if (resolved == null && m_parent != null)
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77 resolved = m_parent.ProbeInNamespaces(localName);
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79 if(resolved == null)
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80 Log($"Probe '{localName}' failed");
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81
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82 m_cache[localName] = resolved;
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83 }
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84
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85 return resolved;
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86 }
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87
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88 Type Probe(string typeName) {
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89 var assemblies = AppDomain.CurrentDomain.GetAssemblies();
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90
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91 foreach (var assembly in assemblies) {
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92 var type = assembly.GetType(typeName);
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93 if (type != null)
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94 return type;
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95 }
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96 return null;
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97 }
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98 }
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99 }