internal static ComposablePartDefinition GetMetadataViewProviderPartDefinition(Type providerType, int orderPrecedence, Resolver resolver)
{
Requires.NotNull(providerType, nameof(providerType));
Requires.NotNull(resolver, nameof(resolver));
var exportDefinition = new ExportDefinition(
ContractNameServices.GetTypeIdentity(typeof(IMetadataViewProvider)),
PartCreationPolicyConstraint.GetExportMetadata(CreationPolicy.Shared)
.AddRange(ExportTypeIdentityConstraint.GetExportMetadata(typeof(IMetadataViewProvider)))
.SetItem("OrderPrecedence", orderPrecedence));
var partDefinition = new ComposablePartDefinition(
TypeRef.Get(providerType, resolver),
ImmutableDictionary <string, object> .Empty.Add(CompositionConstants.DgmlCategoryPartMetadataName, new[] { "VsMEFBuiltIn" }),
new[] { exportDefinition },
ImmutableDictionary <MemberRef, IReadOnlyCollection <ExportDefinition> > .Empty,
ImmutableList <ImportDefinitionBinding> .Empty,
string.Empty,
default(MethodRef),
MethodRef.Get(providerType.GetTypeInfo().GetConstructors(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance).Single(c => c.GetParameters().Length == 0), resolver),
ImmutableList <ImportDefinitionBinding> .Empty,
CreationPolicy.Shared,
false);
return(partDefinition);
}
public async Task StaticFactoryMethodCanCreateMEFPart()
{
var discoverer = new AttributedPartDiscovery(Resolver.DefaultInstance, isNonPublicSupported: true);
var someOtherExportPart = discoverer.CreatePart(typeof(SomeOtherExport));
var staticFactoryPart = discoverer.CreatePart(typeof(MEFPartWithStaticFactoryMethod));
var staticFactoryMethodRef = MethodRef.Get(typeof(MEFPartWithStaticFactoryMethod).GetTypeInfo().DeclaredMethods.Single(m => m.Name == nameof(MEFPartWithStaticFactoryMethod.Create)), Resolver.DefaultInstance);
staticFactoryPart = new ComposablePartDefinition(
staticFactoryPart.TypeRef,
staticFactoryPart.Metadata,
staticFactoryPart.ExportedTypes,
staticFactoryPart.ExportingMembers,
staticFactoryPart.ImportingMembers,
staticFactoryPart.SharingBoundary,
staticFactoryPart.OnImportsSatisfiedRef,
staticFactoryMethodRef,
staticFactoryPart.ImportingConstructorImports.Take(1).ToList(),
staticFactoryPart.CreationPolicy,
staticFactoryPart.IsSharingBoundaryInferred);
var catalog = ComposableCatalog.Create(Resolver.DefaultInstance)
.AddParts(new[] { someOtherExportPart, staticFactoryPart });
var configuration = CompositionConfiguration.Create(catalog);
if (!configuration.CompositionErrors.IsEmpty)
{
foreach (var error in configuration.CompositionErrors.Peek())
{
this.logger.WriteLine(error.Message);
}
configuration.ThrowOnErrors();
}
var container = await configuration.CreateContainerAsync(this.logger);
SomeOtherExport anotherExport = container.GetExportedValue <SomeOtherExport>();
MEFPartWithStaticFactoryMethod mefPart = container.GetExportedValue <MEFPartWithStaticFactoryMethod>();
Assert.NotNull(mefPart.SomeOtherExport);
Assert.Same(anotherExport, mefPart.SomeOtherExport);
Assert.True(mefPart.AnotherRandomValue);
}
public static ComposableCatalog WithDocumentTextDifferencingService(this ComposableCatalog catalog)
{
var assemblyQualifiedServiceTypeName = "Microsoft.CodeAnalysis.IDocumentTextDifferencingService, " + typeof(Workspace).GetTypeInfo().Assembly.GetName().ToString();
// Check to see if IDocumentTextDifferencingService is exported
foreach (var part in catalog.Parts)
{
foreach (var pair in part.ExportDefinitions)
{
var exportDefinition = pair.Value;
if (exportDefinition.ContractName != "Microsoft.CodeAnalysis.Host.IWorkspaceService")
{
continue;
}
if (!exportDefinition.Metadata.TryGetValue("ServiceType", out var value) ||
!(value is string serviceType))
{
continue;
}
if (serviceType != assemblyQualifiedServiceTypeName)
{
continue;
}
// The service is exported by default
return(catalog);
}
}
// If IDocumentTextDifferencingService is not exported by default, export it manually
var manualExportDefinition = new ExportDefinition(
typeof(IWorkspaceService).FullName,
metadata: new Dictionary <string, object?>
{
{ "ExportTypeIdentity", typeof(IWorkspaceService).FullName },
{ nameof(ExportWorkspaceServiceAttribute.ServiceType), assemblyQualifiedServiceTypeName },
{ nameof(ExportWorkspaceServiceAttribute.Layer), ServiceLayer.Default },
{ typeof(CreationPolicy).FullName, CreationPolicy.Shared },
{ "ContractType", typeof(IWorkspaceService) },
{ "ContractName", null },
});
var serviceImplType = typeof(Workspace).GetTypeInfo().Assembly.GetType("Microsoft.CodeAnalysis.DefaultDocumentTextDifferencingService");
return(catalog.AddPart(new ComposablePartDefinition(
TypeRef.Get(serviceImplType, Resolver.DefaultInstance),
new Dictionary <string, object?> {
{ "SharingBoundary", null }
},
new[] { manualExportDefinition },
new Dictionary <MemberRef, IReadOnlyCollection <ExportDefinition> >(),
Enumerable.Empty <ImportDefinitionBinding>(),
sharingBoundary: string.Empty,
default(MethodRef),
MethodRef.Get(serviceImplType.GetConstructors(BindingFlags.Instance | BindingFlags.Public).First(), Resolver.DefaultInstance),
new List <ImportDefinitionBinding>(),
CreationPolicy.Shared,
new[] { typeof(Workspace).GetTypeInfo().Assembly.GetName() },
isSharingBoundaryInferred: false)));
}
protected override ComposablePartDefinition?CreatePart(Type partType, bool typeExplicitlyRequested)
{
Requires.NotNull(partType, nameof(partType));
var partTypeInfo = partType.GetTypeInfo();
if (!typeExplicitlyRequested)
{
bool isPublic = partType.IsNested ? partTypeInfo.IsNestedPublic : partTypeInfo.IsPublic;
if (!this.IsNonPublicSupported && !isPublic)
{
// Skip non-public types.
return(null);
}
}
var declaredProperties = partTypeInfo.GetProperties(BindingFlags.Instance | this.PublicVsNonPublicFlags);
var exportingProperties = from member in declaredProperties
from export in member.GetAttributes <ExportAttribute>()
where member.GetMethod != null // MEFv2 quietly omits exporting properties with no getter
select new KeyValuePair <MemberInfo, ExportAttribute>(member, export);
var exportedTypes = from export in partTypeInfo.GetAttributes <ExportAttribute>()
select new KeyValuePair <MemberInfo, ExportAttribute>(partTypeInfo, export);
var exportsByMember = (from export in exportingProperties.Concat(exportedTypes)
group export.Value by export.Key into exportsByType
select exportsByType).Select(g => new KeyValuePair <MemberInfo, ExportAttribute[]>(g.Key, g.ToArray())).ToArray();
if (exportsByMember.Length == 0)
{
return(null);
}
// Check for PartNotDiscoverable only after we've established it's an interesting part.
// This optimizes for the fact that most types have no exports, in which case it's not a discoverable
// part anyway. Checking for the PartNotDiscoverableAttribute first, which is rarely defined,
// doesn't usually pay for itself in terms of short-circuiting. But it does add an extra
// attribute to look for that we don't need to find for all the types that have no export attributes either.
if (!typeExplicitlyRequested && partTypeInfo.IsAttributeDefined <PartNotDiscoverableAttribute>())
{
return(null);
}
foreach (var exportingMember in exportsByMember)
{
this.ThrowOnInvalidExportingMember(exportingMember.Key);
}
TypeRef partTypeRef = TypeRef.Get(partType, this.Resolver);
Type? partTypeAsGenericTypeDefinition = partTypeInfo.IsGenericType ? partType.GetGenericTypeDefinition() : null;
string?sharingBoundary = null;
var sharedAttribute = partTypeInfo.GetFirstAttribute <SharedAttribute>();
if (sharedAttribute != null)
{
sharingBoundary = sharedAttribute.SharingBoundary ?? string.Empty;
}
CreationPolicy partCreationPolicy = sharingBoundary != null ? CreationPolicy.Shared : CreationPolicy.NonShared;
var allExportsMetadata = ImmutableDictionary.CreateRange(PartCreationPolicyConstraint.GetExportMetadata(partCreationPolicy));
var exportsOnType = ImmutableList.CreateBuilder <ExportDefinition>();
var exportsOnMembers = ImmutableDictionary.CreateBuilder <MemberRef, IReadOnlyCollection <ExportDefinition> >();
var imports = ImmutableList.CreateBuilder <ImportDefinitionBinding>();
foreach (var export in exportsByMember)
{
var member = export.Key;
var memberExportMetadata = allExportsMetadata.AddRange(this.GetExportMetadata(member));
if (member is TypeInfo)
{
foreach (var exportAttribute in export.Value)
{
Type exportedType = exportAttribute.ContractType ?? partTypeAsGenericTypeDefinition ?? partType;
ExportDefinition exportDefinition = CreateExportDefinition(memberExportMetadata, exportAttribute, exportedType);
exportsOnType.Add(exportDefinition);
}
}
else // property
{
var property = (PropertyInfo)member;
Verify.Operation(!partTypeInfo.IsGenericTypeDefinition, Strings.ExportsOnMembersNotAllowedWhenDeclaringTypeGeneric);
var exportDefinitions = ImmutableList.CreateBuilder <ExportDefinition>();
foreach (var exportAttribute in export.Value)
{
Type exportedType = exportAttribute.ContractType ?? property.PropertyType;
ExportDefinition exportDefinition = CreateExportDefinition(memberExportMetadata, exportAttribute, exportedType);
exportDefinitions.Add(exportDefinition);
}
exportsOnMembers.Add(MemberRef.Get(member, this.Resolver), exportDefinitions.ToImmutable());
}
}
foreach (var member in declaredProperties)
{
var importAttribute = member.GetFirstAttribute <ImportAttribute>();
var importManyAttribute = member.GetFirstAttribute <ImportManyAttribute>();
Requires.Argument(!(importAttribute != null && importManyAttribute != null), "partType", Strings.MemberContainsBothImportAndImportMany, member.Name);
var importConstraints = GetImportConstraints(member);
ImportDefinition?importDefinition;
if (this.TryCreateImportDefinition(ReflectionHelpers.GetMemberType(member), member, importConstraints, out importDefinition))
{
var importDefinitionBinding = new ImportDefinitionBinding(
importDefinition,
TypeRef.Get(partType, this.Resolver),
MemberRef.Get(member, this.Resolver),
TypeRef.Get(member.PropertyType, this.Resolver),
TypeRef.Get(GetImportingSiteTypeWithoutCollection(importDefinition, member.PropertyType), this.Resolver));
imports.Add(importDefinitionBinding);
}
}
MethodInfo?onImportsSatisfied = null;
foreach (var method in partTypeInfo.GetMethods(this.PublicVsNonPublicFlags | BindingFlags.Instance))
{
if (method.IsAttributeDefined <OnImportsSatisfiedAttribute>())
{
Verify.Operation(method.GetParameters().Length == 0, Strings.OnImportsSatisfiedTakeNoParameters);
Verify.Operation(onImportsSatisfied == null, Strings.OnlyOneOnImportsSatisfiedMethodIsSupported);
onImportsSatisfied = method;
}
}
var importingConstructorParameters = ImmutableList.CreateBuilder <ImportDefinitionBinding>();
var importingCtor = GetImportingConstructor <ImportingConstructorAttribute>(partType, publicOnly: !this.IsNonPublicSupported);
Verify.Operation(importingCtor != null, Strings.NoImportingConstructorFound);
foreach (var parameter in importingCtor.GetParameters())
{
var import = this.CreateImport(parameter, GetImportConstraints(parameter));
if (import.ImportDefinition.Cardinality == ImportCardinality.ZeroOrMore)
{
Verify.Operation(PartDiscovery.IsImportManyCollectionTypeCreateable(import), Strings.CollectionMustBePublicAndPublicCtorWhenUsingImportingCtor);
}
importingConstructorParameters.Add(import);
}
var partMetadata = ImmutableDictionary.CreateBuilder <string, object?>();
foreach (var partMetadataAttribute in partTypeInfo.GetAttributes <PartMetadataAttribute>())
{
partMetadata[partMetadataAttribute.Name] = partMetadataAttribute.Value;
}
var assemblyNamesForMetadataAttributes = ImmutableHashSet.CreateBuilder <AssemblyName>(ByValueEquality.AssemblyName);
foreach (var export in exportsByMember)
{
GetAssemblyNamesFromMetadataAttributes <MetadataAttributeAttribute>(export.Key, assemblyNamesForMetadataAttributes);
}
return(new ComposablePartDefinition(
TypeRef.Get(partType, this.Resolver),
partMetadata.ToImmutable(),
exportsOnType.ToImmutable(),
exportsOnMembers.ToImmutable(),
imports.ToImmutable(),
sharingBoundary,
MethodRef.Get(onImportsSatisfied, this.Resolver),
MethodRef.Get(importingCtor, this.Resolver),
importingConstructorParameters.ToImmutable(),
partCreationPolicy,
assemblyNamesForMetadataAttributes));
}
protected override ComposablePartDefinition?CreatePart(Type partType, bool typeExplicitlyRequested)
{
Requires.NotNull(partType, nameof(partType));
var partTypeInfo = partType.GetTypeInfo();
// We want to ignore abstract classes, but we want to consider static classes.
// Static classes claim to be both abstract and sealed. So to ignore just abstract
// ones, we check that they are not sealed.
if (partTypeInfo.IsAbstract && !partTypeInfo.IsSealed)
{
return(null);
}
BindingFlags everythingLocal = BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic;
BindingFlags instanceLocal = BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic;
// If the type is abstract only find local static exports
var exportBindingFlags = everythingLocal;
if (partTypeInfo.IsAbstract)
{
exportBindingFlags &= ~BindingFlags.Instance;
}
var declaredMethods = partType.GetMethods(exportBindingFlags); // methods can only export, not import
var declaredProperties = partType.GetProperties(everythingLocal);
var declaredFields = partType.GetFields(everythingLocal);
var allLocalMembers = declaredMethods.Concat <MemberInfo>(declaredProperties).Concat(declaredFields);
var exportingMembers = from member in allLocalMembers
from export in member.GetAttributes <ExportAttribute>()
select new KeyValuePair <MemberInfo, ExportAttribute>(member, export);
var exportedTypes = from export in partTypeInfo.GetAttributes <ExportAttribute>()
select new KeyValuePair <MemberInfo, ExportAttribute>(partTypeInfo, export);
var inheritedExportedTypes = from baseTypeOrInterface in partType.GetInterfaces().Concat(partType.EnumTypeAndBaseTypes().Skip(1))
where baseTypeOrInterface != typeof(object)
from export in baseTypeOrInterface.GetTypeInfo().GetAttributes <InheritedExportAttribute>()
select new KeyValuePair <MemberInfo, ExportAttribute>(baseTypeOrInterface.GetTypeInfo(), export);
var exportsByMember = (from export in exportingMembers.Concat(exportedTypes).Concat(inheritedExportedTypes)
group export.Value by export.Key into exportsByType
select exportsByType).Select(g => new KeyValuePair <MemberInfo, ExportAttribute[]>(g.Key, g.ToArray())).ToArray();
if (exportsByMember.Length == 0)
{
return(null);
}
// Check for PartNotDiscoverable only after we've established it's an interesting part.
// This optimizes for the fact that most types have no exports, in which case it's not a discoverable
// part anyway. Checking for the PartNotDiscoverableAttribute first, which is rarely defined,
// doesn't usually pay for itself in terms of short-circuiting. But it does add an extra
// attribute to look for that we don't need to find for all the types that have no export attributes either.
if (!typeExplicitlyRequested && partTypeInfo.IsAttributeDefined <PartNotDiscoverableAttribute>())
{
return(null);
}
foreach (var exportingMember in exportsByMember)
{
this.ThrowOnInvalidExportingMember(exportingMember.Key);
}
TypeRef partTypeRef = TypeRef.Get(partType, this.Resolver);
Type? partTypeAsGenericTypeDefinition = partTypeInfo.IsGenericType ? partType.GetGenericTypeDefinition() : null;
// Collect information for all imports.
var imports = ImmutableList.CreateBuilder <ImportDefinitionBinding>();
this.AddImportsFromMembers(declaredProperties, declaredFields, partTypeRef, imports);
Type?baseType = partTypeInfo.BaseType;
while (baseType != null && baseType != typeof(object))
{
this.AddImportsFromMembers(baseType.GetProperties(instanceLocal), baseType.GetFields(instanceLocal), partTypeRef, imports);
baseType = baseType.GetTypeInfo().BaseType;
}
var partCreationPolicy = CreationPolicy.Any;
var partCreationPolicyAttribute = partTypeInfo.GetFirstAttribute <PartCreationPolicyAttribute>();
if (partCreationPolicyAttribute != null)
{
partCreationPolicy = (CreationPolicy)partCreationPolicyAttribute.CreationPolicy;
}
var allExportsMetadata = ImmutableDictionary.CreateRange(PartCreationPolicyConstraint.GetExportMetadata(partCreationPolicy));
var inheritedExportContractNamesFromNonInterfaces = ImmutableHashSet.CreateBuilder <string>();
var exportDefinitions = ImmutableList.CreateBuilder <KeyValuePair <MemberInfo, ExportDefinition> >();
foreach (var export in exportsByMember)
{
var memberExportMetadata = allExportsMetadata.AddRange(GetExportMetadata(export.Key));
if (export.Key is MethodInfo method)
{
var exportAttributes = export.Value;
if (exportAttributes.Any())
{
foreach (var exportAttribute in exportAttributes)
{
Type exportedType = exportAttribute.ContractType ?? ReflectionHelpers.GetContractTypeForDelegate(method);
string contractName = string.IsNullOrEmpty(exportAttribute.ContractName) ? GetContractName(exportedType) : exportAttribute.ContractName;
var exportMetadata = memberExportMetadata
.Add(CompositionConstants.ExportTypeIdentityMetadataName, ContractNameServices.GetTypeIdentity(exportedType));
var exportDefinition = new ExportDefinition(contractName, exportMetadata);
exportDefinitions.Add(new KeyValuePair <MemberInfo, ExportDefinition>(export.Key, exportDefinition));
}
}
}
else
{
MemberInfo exportingTypeOrPropertyOrField = export.Key;
Verify.Operation(export.Key is TypeInfo || !partTypeInfo.IsGenericTypeDefinition, Strings.ExportsOnMembersNotAllowedWhenDeclaringTypeGeneric);
Type exportSiteType = ReflectionHelpers.GetMemberType(exportingTypeOrPropertyOrField);
foreach (var exportAttribute in export.Value)
{
Type exportedType = exportAttribute.ContractType ?? partTypeAsGenericTypeDefinition ?? exportSiteType;
string contractName = string.IsNullOrEmpty(exportAttribute.ContractName) ? GetContractName(exportedType) : exportAttribute.ContractName;
if (export.Key is TypeInfo && exportAttribute is InheritedExportAttribute)
{
if (inheritedExportContractNamesFromNonInterfaces.Contains(contractName))
{
// We already have an export with this contract name on this type (from a more derived type)
// using InheritedExportAttribute.
continue;
}
if (!((TypeInfo)export.Key).IsInterface)
{
inheritedExportContractNamesFromNonInterfaces.Add(contractName);
}
}
var exportMetadata = memberExportMetadata
.Add(CompositionConstants.ExportTypeIdentityMetadataName, ContractNameServices.GetTypeIdentity(exportedType));
var exportDefinition = new ExportDefinition(contractName, exportMetadata);
exportDefinitions.Add(new KeyValuePair <MemberInfo, ExportDefinition>(export.Key, exportDefinition));
}
}
}
MethodInfo?onImportsSatisfied = null;
if (typeof(IPartImportsSatisfiedNotification).IsAssignableFrom(partType))
{
onImportsSatisfied = OnImportsSatisfiedMethodInfo;
}
var importingConstructorParameters = ImmutableList.CreateBuilder <ImportDefinitionBinding>();
var importingCtor = GetImportingConstructor <ImportingConstructorAttribute>(partType, publicOnly: false);
if (importingCtor != null) // some parts have exports merely for metadata -- they can't be instantiated
{
foreach (var parameter in importingCtor.GetParameters())
{
var import = this.CreateImport(parameter);
if (import.ImportDefinition.Cardinality == ImportCardinality.ZeroOrMore)
{
Verify.Operation(PartDiscovery.IsImportManyCollectionTypeCreateable(import), Strings.CollectionMustBePublicAndPublicCtorWhenUsingImportingCtor);
}
importingConstructorParameters.Add(import);
}
}
var partMetadata = ImmutableDictionary.CreateBuilder <string, object?>();
foreach (var partMetadataAttribute in partTypeInfo.GetAttributes <PartMetadataAttribute>())
{
partMetadata[partMetadataAttribute.Name] = partMetadataAttribute.Value;
}
var exportsOnType = exportDefinitions.Where(kv => kv.Key is TypeInfo).Select(kv => kv.Value).ToArray();
var exportsOnMembers = (from kv in exportDefinitions
where !(kv.Key is TypeInfo)
group kv.Value by kv.Key into byMember
select byMember).ToDictionary(g => MemberRef.Get(g.Key, this.Resolver), g => (IReadOnlyCollection <ExportDefinition>)g.ToArray());
var assemblyNamesForMetadataAttributes = ImmutableHashSet.CreateBuilder <AssemblyName>(ByValueEquality.AssemblyName);
foreach (var export in exportsByMember)
{
GetAssemblyNamesFromMetadataAttributes <MetadataAttributeAttribute>(export.Key, assemblyNamesForMetadataAttributes);
}
return(new ComposablePartDefinition(
TypeRef.Get(partType, this.Resolver),
partMetadata.ToImmutable(),
exportsOnType,
exportsOnMembers,
imports.ToImmutable(),
partCreationPolicy != CreationPolicy.NonShared ? string.Empty : null,
MethodRef.Get(onImportsSatisfied, this.Resolver),
MethodRef.Get(importingCtor, this.Resolver),
importingCtor != null ? importingConstructorParameters.ToImmutable() : null, // some MEF parts are only for metadata
partCreationPolicy,
assemblyNamesForMetadataAttributes,
partCreationPolicy != CreationPolicy.NonShared));
}