TypeResolver.cs
128 lines
| 4.3 KiB
| text/x-csharp
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r270 | using System; | |
| using System.Collections.Generic; | |||
| using System.Linq; | |||
| using System.Text; | |||
| using System.Text.RegularExpressions; | |||
| using Implab.Diagnostics; | |||
| namespace Implab.ServiceHost.Unity | |||
| { | |||
| using static Trace<TypeResolver>; | |||
| public class TypeResolver | |||
| { | |||
| readonly Dictionary<string, Type> m_cache = new Dictionary<string, Type>(); | |||
| Regex _nsRx = new Regex(@"^\w+(\.\w+)*$", RegexOptions.Compiled); | |||
| readonly LinkedList<string> m_namespases = new LinkedList<string>(); | |||
| LinkedListNode<string> m_insertAt; | |||
| readonly TypeResolver m_parent; | |||
| public TypeResolver() : this(null) { | |||
| } | |||
| public TypeResolver(TypeResolver parent) { | |||
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r272 | m_parent = parent; | |
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r270 | m_insertAt = new LinkedListNode<string>(string.Empty); | |
| m_namespases.AddFirst(m_insertAt); | |||
| } | |||
| public void AddNamespace(string ns) { | |||
| Safe.ArgumentMatch(ns, nameof(ns), _nsRx); | |||
| if (m_insertAt != null) | |||
| m_namespases.AddAfter(m_insertAt, ns); | |||
| else | |||
| m_namespases.AddFirst(ns); | |||
| } | |||
| public void AddMapping(string typeName, Type type) { | |||
| Safe.ArgumentNotEmpty(typeName, nameof(typeName)); | |||
| Safe.ArgumentNotNull(type, nameof(type)); | |||
| m_cache[typeName] = type; | |||
| } | |||
| public Type Resolve(TypeReference reference) { | |||
| var args = reference.IsGeneric && !reference.IsOpenGeneric ? reference.GenericParameters?.Select(Resolve).ToArray() : null; | |||
| var argc = reference.IsGeneric ? reference.GenericParameters.Length : 0; | |||
| Type resolved; | |||
| if(!m_cache.TryGetValue(reference.ToString(), out resolved)) { | |||
| resolved = ResolveInternal(reference, args, argc); | |||
| if (resolved == null) | |||
| throw new Exception($"Failed to resolve {reference}"); | |||
| m_cache[reference.ToString()] = resolved; | |||
| } | |||
| return resolved; | |||
| } | |||
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r272 | public Type Resolve(string typeSpec) { | |
| return Resolve(TypeReference.Parse(typeSpec)); | |||
| } | |||
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r270 | Type ResolveInternal(TypeReference reference, Type[] args, int argc) { | |
| var resolved = ProbeInNamespaces( | |||
| String.Join(".", new [] { reference.Namespace, reference.TypeName }.Where(x => !string.IsNullOrEmpty(x)) ), | |||
| args, | |||
| argc, | |||
| reference.IsArray, | |||
| reference.ToString() | |||
| ); | |||
| if (resolved == null && m_parent != null) | |||
| resolved = m_parent.Resolve(reference); | |||
| return resolved; | |||
| } | |||
| public Type ProbeInNamespaces(string localName, Type[] args, int argc, bool isArray, string referenceName) { | |||
| foreach (var ns in m_namespases) { | |||
| var typeName = FormatName(new [] { ns, localName}, argc, args, isArray); | |||
| var resolved = Probe(typeName); | |||
| if (resolved != null) { | |||
| Log("Probe succeed {0} in '{1}': {2} -> {3}", referenceName, ns, typeName, resolved.AssemblyQualifiedName); | |||
| return resolved; | |||
| } else { | |||
| Log("Probe failed {0} in '{1}': {2}", referenceName, ns, typeName); | |||
| } | |||
| } | |||
| return null; | |||
| } | |||
| Type Probe(string typeName) { | |||
| var assemblies = AppDomain.CurrentDomain.GetAssemblies(); | |||
| foreach(var assembly in assemblies) { | |||
| var type = assembly.GetType(typeName); | |||
| if (type != null) | |||
| return type; | |||
| } | |||
| return null; | |||
| } | |||
| string FormatName(string[] parts, int argc, Type[] args, bool isArray) { | |||
| var builder = new StringBuilder(); | |||
| builder.Append(String.Join(".", parts.Where(x => !string.IsNullOrEmpty(x)))); | |||
| if (argc > 0) { | |||
| builder.Append('`'); | |||
| builder.Append(argc); | |||
| } | |||
| if (args!= null && args.Length > 0) { | |||
| builder.Append('['); | |||
| builder.Append(string.Join(",", args.Select(x => $"[{x.AssemblyQualifiedName}]"))); | |||
| builder.Append(']'); | |||
| } | |||
| if(isArray) | |||
| builder.Append("[]"); | |||
| return builder.ToString(); | |||
| } | |||
| } | |||
| } |