public ClassWeavingContext(TypeDefinition typeDefinition, References references)
{
TypeDefinition = typeDefinition;
References = references;
}
public static bool IsEligibleForWeaving(this MethodDefinition methodDefinition, References references)
{
if (methodDefinition == null)
{
throw new ArgumentNullException(nameof(methodDefinition));
}
if (references == null)
{
throw new ArgumentNullException(nameof(references));
}
TypeDefinition typeDefinition = references.CompilerGeneratedAttributeType.Resolve();
if (methodDefinition.ReturnType.Equals(methodDefinition.Module.TypeSystem.Void))
{
return(false);
}
bool isSpecialName = methodDefinition.IsSpecialName || methodDefinition.IsGetter || methodDefinition.IsSetter ||
methodDefinition.IsConstructor;
bool hasCompilerGeneratedAttribute =
methodDefinition.CustomAttributes.Any(attribute => attribute.AttributeType.Resolve().Equals(typeDefinition));
return(!isSpecialName && !hasCompilerGeneratedAttribute);
}
public static References Init(ModuleWeaver moduleWeaver)
{
if (moduleWeaver == null)
{
throw new ArgumentNullException(nameof(moduleWeaver));
}
References references = new References(moduleWeaver);
TypeDefinition cacheAttributeType = moduleWeaver.FindTypeDefinition("SpatialFocus.MethodCache.CacheAttribute");
references.CacheAttributeType = moduleWeaver.ModuleDefinition.ImportReference(cacheAttributeType);
TypeDefinition noCacheAttributeType = moduleWeaver.FindTypeDefinition("SpatialFocus.MethodCache.NoCacheAttribute");
references.NoCacheAttributeType = moduleWeaver.ModuleDefinition.ImportReference(noCacheAttributeType);
TypeDefinition type = moduleWeaver.FindTypeDefinition(typeof(Type).FullName);
references.TypeType = moduleWeaver.ModuleDefinition.ImportReference(type);
TypeDefinition compilerGeneratedAttributeType = moduleWeaver.FindTypeDefinition(typeof(CompilerGeneratedAttribute).FullName);
references.CompilerGeneratedAttributeType = moduleWeaver.ModuleDefinition.ImportReference(compilerGeneratedAttributeType);
references.GetTypeFromHandleMethod =
moduleWeaver.ModuleDefinition.ImportReference(type.Methods.Single(x => x.Name == nameof(Type.GetTypeFromHandle)));
TypeDefinition timeSpanType = moduleWeaver.FindTypeDefinition(typeof(TimeSpan).FullName);
references.TimeSpanType = moduleWeaver.ModuleDefinition.ImportReference(timeSpanType);
references.TimeSpanFromSecondsMethod =
moduleWeaver.ModuleDefinition.ImportReference(timeSpanType.Methods.Single(x => x.Name == nameof(TimeSpan.FromSeconds)));
TypeDefinition nullableType = moduleWeaver.FindTypeDefinition(typeof(Nullable <>).FullName);
references.NullableTimeSpanConstructor =
moduleWeaver.ModuleDefinition.ImportReference(nullableType.GetConstructors()
.Single()
.MakeHostInstanceGeneric(references.TimeSpanType));
TypeDefinition memoryCacheInterface = moduleWeaver.FindTypeDefinition("Microsoft.Extensions.Caching.Memory.IMemoryCache");
references.MemoryCacheInterface = moduleWeaver.ModuleDefinition.ImportReference(memoryCacheInterface);
TypeDefinition cacheExtensions = moduleWeaver.FindTypeDefinition("Microsoft.Extensions.Caching.Memory.CacheExtensions");
references.CacheExtensionsType = moduleWeaver.ModuleDefinition.ImportReference(cacheExtensions);
TypeDefinition memoryCacheEntryOptions =
moduleWeaver.FindTypeDefinition("Microsoft.Extensions.Caching.Memory.MemoryCacheEntryOptions");
references.MemoryCacheEntryOptionsType = moduleWeaver.ModuleDefinition.ImportReference(memoryCacheEntryOptions);
references.MemoryCacheEntryOptionsConstructor =
moduleWeaver.ModuleDefinition.ImportReference(memoryCacheEntryOptions.GetConstructors().Single(x => !x.Parameters.Any()));
references.MemoryCacheEntryOptionsAbsoluteExpirationRelativeToNowSetter =
moduleWeaver.ModuleDefinition.ImportReference(memoryCacheEntryOptions.Properties
.Single(x => x.Name == "AbsoluteExpirationRelativeToNow")
.SetMethod);
references.MemoryCacheEntryOptionsSlidingExpirationSetter =
moduleWeaver.ModuleDefinition.ImportReference(memoryCacheEntryOptions.Properties.Single(x => x.Name == "SlidingExpiration")
.SetMethod);
references.MemoryCacheEntryOptionsPrioritySetter =
moduleWeaver.ModuleDefinition.ImportReference(
memoryCacheEntryOptions.Properties.Single(x => x.Name == "Priority").SetMethod);
references.TryGetValueMethod =
moduleWeaver.ModuleDefinition.ImportReference(cacheExtensions.Methods.Single(x => x.Name == "TryGetValue"));
references.SetMethod =
moduleWeaver.ModuleDefinition.ImportReference(cacheExtensions.Methods.Single(x =>
x.Name == "Set" && x.HasParameters && x.Parameters.Count == 3));
references.SetMethodWithMemoryCacheEntryOptions = moduleWeaver.ModuleDefinition.ImportReference(
cacheExtensions.Methods.Single(x =>
x.Name == "Set" && x.HasParameters && x.Parameters.Count == 4 &&
moduleWeaver.ModuleDefinition.ImportReference(x.Parameters.Last().ParameterType).Resolve() ==
references.MemoryCacheEntryOptionsType.Resolve()));
return(references);
}
