private static IReadOnlyDictionary <string, object?> GetExportMetadata(MemberInfo member)
{
Requires.NotNull(member, nameof(member));
var result = ImmutableDictionary.CreateBuilder <string, object?>();
foreach (var attribute in member.GetAttributes <Attribute>())
{
var exportMetadataAttribute = attribute as ExportMetadataAttribute;
if (exportMetadataAttribute != null)
{
if (exportMetadataAttribute.IsMultiple)
{
result[exportMetadataAttribute.Name] = AddElement(result.GetValueOrDefault(exportMetadataAttribute.Name) as Array, exportMetadataAttribute.Value, null);
}
else
{
result.Add(exportMetadataAttribute.Name, exportMetadataAttribute.Value);
}
}
else
{
Type attrType = attribute.GetType();
// Perf optimization, relies on short circuit evaluation, often a property attribute is an ExportAttribute
if (attrType != typeof(ExportAttribute) && attrType.GetTypeInfo().IsAttributeDefined <MetadataAttributeAttribute>(true))
{
var usage = attrType.GetTypeInfo().GetFirstAttribute <AttributeUsageAttribute>(true);
var properties = attribute.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach (var property in properties.Where(p => p.DeclaringType != typeof(Attribute) && p.DeclaringType != typeof(ExportAttribute)))
{
if (usage != null && usage.AllowMultiple)
{
result[property.Name] = AddElement(result.GetValueOrDefault(property.Name) as Array, property.GetValue(attribute), ReflectionHelpers.GetMemberType(property));
}
else
{
if (result.ContainsKey(property.Name))
{
string memberName = member.MemberType.HasFlag(MemberTypes.TypeInfo) || member.MemberType.HasFlag(MemberTypes.NestedType)
? ((TypeInfo)member).FullName !
: $"{member.DeclaringType?.FullName}.{member.Name}";
throw new NotSupportedException(string.Format(CultureInfo.CurrentCulture, Strings.DiscoveredIdenticalPropertiesInMetadataAttributesForPart, memberName, property.Name));
}
result.Add(property.Name, property.GetValue(attribute));
}
}
}
}
}
return(result.ToImmutable());
}
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);
}
}
BindingFlags instanceLocal = BindingFlags.DeclaredOnly | BindingFlags.Instance | this.PublicVsNonPublicFlags;
var declaredProperties = partTypeInfo.GetProperties(instanceLocal);
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> >();
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());
}
}
var imports = ImmutableList.CreateBuilder <ImportDefinitionBinding>();
AddImportsFromMembers(declaredProperties, partTypeRef, imports);
Type?baseType = partTypeInfo.BaseType;
while (baseType != null && baseType != typeof(object))
{
AddImportsFromMembers(baseType.GetProperties(instanceLocal), partTypeRef, imports);
baseType = baseType.GetTypeInfo().BaseType;
}
void AddImportsFromMembers(PropertyInfo[] declaredProperties, TypeRef partTypeRef, IList <ImportDefinitionBinding> imports)
{
foreach (var member in declaredProperties)
{
try
{
var importAttribute = member.GetFirstAttribute <ImportAttribute>();
var importManyAttribute = member.GetFirstAttribute <ImportManyAttribute>();
Requires.Argument(!(importAttribute != null && importManyAttribute != null), nameof(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,
partTypeRef,
MemberRef.Get(member, this.Resolver),
TypeRef.Get(member.PropertyType, this.Resolver),
TypeRef.Get(GetImportingSiteTypeWithoutCollection(importDefinition, member.PropertyType), this.Resolver));
imports.Add(importDefinitionBinding);
}
}
catch (Exception ex)
{
throw ThrowErrorScanningMember(member, ex);
}
}
}
// MEFv2 is willing to find `internal` OnImportsSatisfied methods, so we should too regardless of our NonPublic flag.
var onImportsSatisfied = ImmutableList.CreateBuilder <MethodRef>();
Type?currentType = partTypeInfo;
while (currentType is object && currentType != typeof(object))
{
foreach (var method in currentType.GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance))
{
try
{
if (method.IsAttributeDefined <OnImportsSatisfiedAttribute>())
{
Verify.Operation(method.GetParameters().Length == 0, Strings.OnImportsSatisfiedTakeNoParameters);
onImportsSatisfied.Add(MethodRef.Get(method, this.Resolver));
}
}
catch (Exception ex)
{
throw ThrowErrorScanningMember(method, ex);
}
}
currentType = currentType.GetTypeInfo().BaseType;
}
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,
onImportsSatisfied.ToImmutable(),
MethodRef.Get(importingCtor, this.Resolver),
importingConstructorParameters.ToImmutable(),
partCreationPolicy,
isSharingBoundaryInferred: false,
extraInputAssemblies: 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));
}
public IEnumerable <ComposedPartDiagnostic> Validate(IReadOnlyDictionary <Type, ExportDefinitionBinding> metadataViews)
{
Requires.NotNull(metadataViews, nameof(metadataViews));
if (this.Definition.ExportDefinitions.Any(ed => CompositionConfiguration.ExportDefinitionPracticallyEqual.Default.Equals(ExportProvider.ExportProviderExportDefinition, ed.Value)) &&
!this.Definition.Equals(ExportProvider.ExportProviderPartDefinition))
{
yield return(new ComposedPartDiagnostic(this, Strings.ExportOfExportProviderNotAllowed, this.Definition.Type.FullName));
}
var importsWithGenericTypeParameters = this.Definition.Imports
.Where(import => import.ImportingSiteElementType.GetTypeInfo().ContainsGenericParameters).ToList();
foreach (var import in importsWithGenericTypeParameters)
{
yield return(new ComposedPartDiagnostic(
this,
Strings.ImportsThatUseGenericTypeParametersNotSupported,
GetDiagnosticLocation(import)));
}
foreach (var pair in this.SatisfyingExports)
{
var importDefinition = pair.Key.ImportDefinition;
switch (importDefinition.Cardinality)
{
case ImportCardinality.ExactlyOne:
if (pair.Value.Count != 1)
{
yield return(new ComposedPartDiagnostic(
this,
Strings.ExpectedExactlyOneExportButFound,
GetDiagnosticLocation(pair.Key),
pair.Key.ImportingSiteElementType,
pair.Value.Count,
GetExportsList(pair.Value)));
}
break;
case ImportCardinality.OneOrZero:
if (pair.Value.Count > 1)
{
yield return(new ComposedPartDiagnostic(
this,
Strings.ExpectedOneOrZeroExportsButFound,
GetDiagnosticLocation(pair.Key),
pair.Key.ImportingSiteElementType,
pair.Value.Count,
GetExportsList(pair.Value)));
}
break;
}
foreach (var export in pair.Value)
{
if (ReflectionHelpers.IsAssignableTo(pair.Key, export) == ReflectionHelpers.Assignability.DefinitelyNot)
{
yield return(new ComposedPartDiagnostic(
this,
Strings.IsNotAssignableFromExportedMEFValue,
GetDiagnosticLocation(pair.Key),
GetDiagnosticLocation(export)));
}
// Some parts exist exclusively for their metadata and the parts themselves are not instantiable.
// But that only makes sense if all importers do it lazily. If this part imports one of these
// non-instantiable parts in a non-lazy fashion, it's doomed to fail at runtime, so call it a graph error.
if (!pair.Key.IsLazy && !export.IsStaticExport && !export.PartDefinition.IsInstantiable)
{
// Special case around our export provider.
if (export.ExportDefinition != ExportProvider.ExportProviderExportDefinition)
{
yield return(new ComposedPartDiagnostic(
this,
Strings.CannotImportBecauseExportingPartCannotBeInstantiated,
GetDiagnosticLocation(pair.Key),
GetDiagnosticLocation(export)));
}
}
}
if (pair.Key.ImportDefinition.Cardinality == ImportCardinality.ZeroOrMore && !pair.Key.ImportingParameterRef.IsEmpty && !IsAllowedImportManyParameterType(pair.Key.ImportingParameterRef.Resolve().ParameterType))
{
yield return(new ComposedPartDiagnostic(this, Strings.ImportingCtorHasUnsupportedParameterTypeForImportMany));
}
var metadataType = pair.Key.MetadataType;
if (metadataType != null && !metadataViews.ContainsKey(metadataType))
{
yield return(new ComposedPartDiagnostic(
this,
Strings.MetadataTypeNotSupported,
GetDiagnosticLocation(pair.Key),
metadataType.FullName));
}
}
}
public ImportDefinitionBinding(ImportDefinition importDefinition, TypeRef composablePartType, MemberRef importingMember)
: this(
importDefinition,
composablePartType,
importingMember,
TypeRef.Get(ReflectionHelpers.GetMemberType(importingMember.MemberInfo), importingMember.Resolver),
TypeRef.Get(importDefinition.Cardinality == ImportCardinality.ZeroOrMore ? PartDiscovery.GetElementTypeFromMany(ReflectionHelpers.GetMemberType(importingMember.MemberInfo)) : ReflectionHelpers.GetMemberType(importingMember.MemberInfo), importingMember.Resolver))
{
}
private ImmutableDictionary <string, object> GetExportMetadata(ICustomAttributeProvider member)
{
Requires.NotNull(member, nameof(member));
var result = ImmutableDictionary.CreateBuilder <string, object>();
var namesOfMetadataWithMultipleValues = new HashSet <string>(StringComparer.Ordinal);
foreach (var attribute in member.GetAttributes <Attribute>())
{
var attrType = attribute.GetType().GetTypeInfo();
var exportMetadataAttribute = attribute as ExportMetadataAttribute;
if (exportMetadataAttribute != null)
{
UpdateMetadataDictionary(result, namesOfMetadataWithMultipleValues, exportMetadataAttribute.Name, exportMetadataAttribute.Value, null);
}
else
{
// Perf optimization, relies on short circuit evaluation, often a property attribute is an ExportAttribute
if (attrType != typeof(ExportAttribute).GetTypeInfo() && attrType.IsAttributeDefined <MetadataAttributeAttribute>())
{
var properties = attrType.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
foreach (var property in properties.Where(p => p.DeclaringType != typeof(Attribute)))
{
UpdateMetadataDictionary(result, namesOfMetadataWithMultipleValues, property.Name, property.GetValue(attribute), ReflectionHelpers.GetMemberType(property));
}
}
}
}
return(result.ToImmutable());
}
private static XDocument CreateDgml(ISet <ComposedPart> parts)
{
Requires.NotNull(parts, nameof(parts));
XElement nodes, links;
var dgml = Dgml.Create(out nodes, out links, direction: "RightToLeft")
.WithStyle(
"ExportFactory",
new Dictionary <string, string>
{
{ "StrokeDashArray", "2,2" },
},
"Link")
.WithStyle(
"VsMEFBuiltIn",
new Dictionary <string, string>
{
{ "Visibility", "Hidden" },
});
foreach (string sharingBoundary in parts.Select(p => p.Definition.SharingBoundary).Distinct())
{
if (!string.IsNullOrEmpty(sharingBoundary))
{
nodes.Add(Dgml.Node(sharingBoundary, sharingBoundary, "Expanded"));
}
}
foreach (var part in parts)
{
var node = Dgml.Node(part.Definition.Id, ReflectionHelpers.GetTypeName(part.Definition.Type, false, true, null, null));
if (!string.IsNullOrEmpty(part.Definition.SharingBoundary))
{
node.ContainedBy(part.Definition.SharingBoundary, dgml);
}
string[] partDgmlCategories;
if (part.Definition.Metadata.TryGetValue(CompositionConstants.DgmlCategoryPartMetadataName, out partDgmlCategories))
{
node = node.WithCategories(partDgmlCategories);
}
nodes.Add(node);
foreach (var import in part.SatisfyingExports.Keys)
{
foreach (ExportDefinitionBinding export in part.SatisfyingExports[import])
{
string linkLabel = !export.ExportedValueTypeRef.Equals(export.PartDefinition.TypeRef)
? export.ExportedValueType.ToString()
: null;
var link = Dgml.Link(export.PartDefinition.Id, part.Definition.Id, linkLabel);
if (import.IsExportFactory)
{
link = link.WithCategories("ExportFactory");
}
links.Add(link);
}
}
}
return(dgml);
}
internal void GetInputAssemblies(ISet <AssemblyName> assemblies)
{
Requires.NotNull(assemblies, nameof(assemblies));
ReflectionHelpers.GetInputAssembliesFromMetadata(assemblies, this.Metadata);
}
private static ImmutableDictionary <string, MetadatumRequirement> GetRequiredMetadata(TypeRef metadataViewRef, Resolver resolver)
{
Requires.NotNull(metadataViewRef, nameof(metadataViewRef));
Requires.NotNull(resolver, nameof(resolver));
var metadataView = metadataViewRef.Resolve();
bool hasMetadataViewImplementation = MetadataViewImplProxy.HasMetadataViewImplementation(metadataView);
if (metadataView.GetTypeInfo().IsInterface&& !metadataView.Equals(typeof(IDictionary <string, object>)) && !metadataView.Equals(typeof(IReadOnlyDictionary <string, object>)))
{
var requiredMetadata = ImmutableDictionary.CreateBuilder <string, MetadatumRequirement>();
foreach (var property in metadataView.EnumProperties().WherePublicInstance())
{
bool required = !property.IsAttributeDefined <DefaultValueAttribute>();
// Ignore properties that have a default value and have a metadataview implementation.
if (required || !hasMetadataViewImplementation)
{
requiredMetadata.Add(property.Name, new MetadatumRequirement(TypeRef.Get(ReflectionHelpers.GetMemberType(property), resolver), required));
}
}
return(requiredMetadata.ToImmutable());
}
return(ImmutableDictionary <string, MetadatumRequirement> .Empty);
}
public void ToString(TextWriter writer)
{
var indentingWriter = IndentingTextWriter.Get(writer);
foreach (var requirement in this.Requirements)
{
indentingWriter.WriteLine("{0} = {1} (required: {2})", requirement.Key, ReflectionHelpers.GetTypeName(requirement.Value.MetadatumValueType, false, true, null, null), requirement.Value.IsMetadataumValueRequired);
}
}
