Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / Tools / System.Activities.Presentation / System / Activities / Presentation / Base / Core / Metadata / MetadataStore.cs / 1305376 / MetadataStore.cs
using System.Diagnostics.CodeAnalysis;
namespace System.Activities.Presentation.Metadata
{
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Globalization;
using System.Reflection;
using System.Activities.Presentation.Internal.Metadata;
using System.Runtime;
using System.Activities.Presentation;
///
/// The MetadataStore is a container of custom attribute metadata.
/// Custom attributes may be defined in an attribute table and added
/// to the metadata store. Once added, these attributes will appear
/// in calls made to TypeDescriptor.
///
public static class MetadataStore {
private static object _syncLock = new object();
private static MetadataStoreProvider _objectProvider;
private static Dictionary _interfaces;
private static Hashtable _typeAttributeCache;
[SuppressMessage("Microsoft.Performance", "CA1810:InitializeReferenceTypeStaticFieldsInline")]
static MetadataStore()
{
TypeDescriptor.Refreshed += TypeDescriptor_Refreshed;
}
static void TypeDescriptor_Refreshed(RefreshEventArgs e) {
_typeAttributeCache = null;
}
///
/// Adds the given table to the current AppDomain�s attribute store.
/// Once added, calls to TypeDescriptor will use attributes defined
/// in the newly added table. Multiple tables may be added to the
/// attribute store. In the case of conflicts, attributes in the
/// most recently added table win.
///
/// if table is null
public static void AddAttributeTable(AttributeTable table) {
if (table == null) throw FxTrace.Exception.ArgumentNull("table");
lock (_syncLock) {
if (_objectProvider == null) {
_objectProvider = new MetadataStoreProvider(table);
TypeDescriptor.AddProvider(_objectProvider, typeof(object));
}
else {
_objectProvider.AddTable(table);
}
foreach (Type t in table.AttributedTypes) {
// If there are any interface types in the given
// table, we must add providers specifically for those
// types because interfaces do not derive from object and
// are therefore missed by our global hook.
if (t.IsInterface) {
if (_interfaces == null) {
_interfaces = new Dictionary();
}
if (!_interfaces.ContainsKey(t)) {
TypeDescriptor.AddProvider(_objectProvider, t);
_interfaces.Add(t, t);
}
}
}
}
// Now invalidate the types.
foreach (Type t in table.AttributedTypes) {
TypeDescriptor.Refresh(t);
}
#if DEBUG
table.DebugValidateProvider();
#endif
}
//
// This type description provider is used for all objects and
// interfaces.
//
private class MetadataStoreProvider : TypeDescriptionProvider {
private Dictionary _metadataTypeCache;
private Dictionary _attributeCache;
private Dictionary _descriptorCache;
private AttributeTable[] _tables;
private object _syncLock = new object();
internal MetadataStoreProvider(AttributeTable table)
: base(TypeDescriptor.GetProvider(typeof(object))) {
_tables = new AttributeTable[] { table };
}
//
// Called by the metadata store to add a new table to our
// provider. Guarded by a lock on the metadata store.
//
internal void AddTable(AttributeTable table) {
// We don't expect a huge number of tables,
// so creating a new array here is fine. Also,
// this has the added benefit of allowing code
// that eumerates tables to be thread-safe
// without taking any locks. Caller is responsible
// for ensuring AddTable is synchronized.
AttributeTable[] newTables;
newTables = new AttributeTable[_tables.Length + 1];
_tables.CopyTo(newTables, 1);
newTables[0] = table;
_tables = newTables;
if (_attributeCache != null) _attributeCache.Clear();
// Clear all metadata types that will change as
// a result of adding this new table
if (_metadataTypeCache != null) {
List toRemove = null;
foreach (Type t in table.AttributedTypes) {
foreach (Type cached in _metadataTypeCache.Keys) {
Type realCachedType = cached.UnderlyingSystemType;
if (t.IsAssignableFrom(realCachedType)) {
if (toRemove == null) toRemove = new List();
toRemove.Add(realCachedType);
}
}
}
if (toRemove != null) {
foreach (Type t in toRemove) {
_metadataTypeCache.Remove(t);
}
}
}
}
//
// Private helper that creates an attribute collection given an array of attributes.
// This does the appropriate pairing down of attributes with matching TypeIds so
// the collection contains no redundant attributes. Attributes should be ordered
// from most derived to least derived, so the first attribute reported wins.
//
private static AttributeCollection CreateAttributeCollection(Attribute[] attrArray) {
Dictionary dict = new Dictionary(attrArray.Length);
// Attrs array is ordered by priority, first one in
// wins.
int finalCount = attrArray.Length;
for (int idx = 0; idx < attrArray.Length; idx++) {
Attribute a = attrArray[idx];
if (dict.ContainsKey(a.TypeId)) {
attrArray[idx] = null;
finalCount--;
}
else {
dict.Add(a.TypeId, a);
}
}
Attribute[] finalArray;
if (finalCount != attrArray.Length) {
finalArray = new Attribute[finalCount];
int finalIdx = 0;
for (int idx = 0; idx < attrArray.Length; idx++) {
if (attrArray[idx] != null) {
finalArray[finalIdx++] = attrArray[idx];
}
}
}
else {
finalArray = attrArray;
}
return new AttributeCollection(finalArray);
}
//
// Returns a cached attribute collection for the given
// object type and member. Member can be null to get
// attributes for the class.
//
private AttributeCollection GetAttributes(Type objectType) {
Fx.Assert(objectType != null, "objectType parameter should not be null");
AttributeCollection attributes;
// Dictionary does not support thread-safe reads. We need to lock on
// all access.
lock (_syncLock) {
if (_attributeCache == null) _attributeCache = new Dictionary();
if (!_attributeCache.TryGetValue(objectType, out attributes)) {
attributes = CreateAttributeCollection(GetRawAttributes(objectType, null, null, false));
_attributeCache[objectType] = attributes;
}
}
return attributes;
}
//
// Raw API to return attributes. This is used by GetAttributes to
// populate the AttributeCollection (which is cached), and by
// the Attributes property on property and event descriptors (where
// caching is handled by the Member Descriptor). Attributes
// are returned from this ordered so the highest priority attributes
// are first (first in wins).
//
private static Attribute[] GetRawAttributes(Type objectType, string member, MemberDescriptor parentDescriptor, bool isEvent) {
Fx.Assert(objectType != null, "objectType parameter should not be null");
Type reflectType = TypeDescriptor.GetReflectionType(objectType);
// There is a bug in CLR reflection that does not respect the "inherit"
// flag for event or property infos. Our custom metadata type does respect
// this flag and correctly does the right thing. If the object type we
// are passed is not a metadata type, just use the default behavior of the
// parent member descriptor. It will be right, and since we're not a metadata
// type that means we have no overrides anyway.
//
// The reason we have to call our type with inherit, instead of just using
// one code path is we need to support the interleaving of CLR and
// metadata table attributes up the inheritance hierarchy. MetadataType
// does that for us.
if (parentDescriptor != null && !(reflectType is MetadataType)) {
AttributeCollection attrs = parentDescriptor.Attributes;
Attribute[] attrArray = new Attribute[attrs.Count];
// CLR property descriptor reverses attribute order. Fix it.
for (int idx = 0; idx < attrArray.Length; idx++) {
attrArray[idx] = attrs[attrArray.Length - idx - 1];
}
return attrArray;
}
MemberInfo reflectMember;
Type reflectMemberType = null;
Attribute[] attributes;
if (member == null) {
reflectMember = reflectType;
}
else if (isEvent) {
EventInfo info = null;
MemberInfo[] infos = reflectType.GetMember(member, MemberTypes.Event, BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public);
if (infos.Length > 0) {
info = infos[0] as EventInfo;
}
reflectMember = info;
if (info != null) reflectMemberType = TypeDescriptor.GetReflectionType(info.EventHandlerType);
}
else {
PropertyInfo info = null;
MemberInfo[] infos = reflectType.GetMember(member, MemberTypes.Property, BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public);
if (infos.Length > 0) {
info = infos[0] as PropertyInfo;
}
reflectMember = info;
if (info != null) reflectMemberType = TypeDescriptor.GetReflectionType(info.PropertyType);
}
if (reflectMember == null) {
Debug.Fail("Member " + member + " is not a member of type " + objectType.Name);
attributes = new Attribute[0];
}
else {
// Cannot simply cast to Attribute[]
Object[] attrs = reflectMember.GetCustomAttributes(typeof(Attribute), true);
List attrList = new List(attrs);
Hashtable cache = _typeAttributeCache;
if (cache == null) {
cache = new Hashtable();
_typeAttributeCache = cache;
}
// Get the base type attributes if we have them
if (reflectMemberType != null) {
reflectType = reflectMemberType;
attrs = (object[])cache[reflectType];
if (attrs == null) {
attrs = reflectType.GetCustomAttributes(typeof(Attribute), true);
lock (cache.SyncRoot) {
cache[reflectType] = attrs;
}
}
attrList.AddRange(attrs);
}
// Get interface attributes too.
foreach (Type iface in reflectType.GetInterfaces()) {
attrs = (object[])cache[iface];
if (attrs == null) {
attrs = iface.GetCustomAttributes(typeof(Attribute), false);
lock (cache.SyncRoot) {
cache[iface] = attrs;
}
}
attrList.AddRange(attrs);
}
// Now go through the attributes and expand those that are
// AttributeProviderAttributes
for (int idx = 0; idx < attrList.Count; idx++) {
AttributeProviderAttribute a = attrList[idx] as AttributeProviderAttribute;
if (a != null) {
reflectType = Type.GetType(a.TypeName);
if (reflectType != null) {
reflectType = TypeDescriptor.GetReflectionType(reflectType);
reflectMember = reflectType;
if (a.PropertyName != null && a.PropertyName.Length > 0) {
MemberInfo[] infos = reflectType.GetMember(a.PropertyName);
if (infos != null && infos.Length > 0) {
reflectMember = infos[0];
}
}
attrList.AddRange(reflectMember.GetCustomAttributes(typeof(Attribute), true));
}
}
}
attributes = new Attribute[attrList.Count];
for (int idx = 0; idx < attrList.Count; idx++) {
attributes[idx] = (Attribute)attrList[idx];
}
}
return attributes;
}
//
// Access to our descriptor cache
//
private MemberDescriptor GetCachedDescriptor(Type objectType, MemberDescriptor descriptor) {
MemberDescriptor cached;
DescriptorKey key = new DescriptorKey(objectType, descriptor);
lock (_syncLock) {
if (_descriptorCache == null || !_descriptorCache.TryGetValue(key, out cached)) {
cached = null;
}
}
return cached;
}
//
// Access to our descriptor cache
//
private void CacheDescriptor(Type objectType, MemberDescriptor descriptor, MemberDescriptor cache) {
lock (_syncLock) {
if (_descriptorCache == null) {
_descriptorCache = new Dictionary();
}
DescriptorKey key = new DescriptorKey(objectType, descriptor);
// Caller may ---- and this cache slot may already be allocated.
// That's OK; we'll just replace it.
_descriptorCache[key] = cache;
}
}
//
// Takes a collection of events and merges them with our own descriptors.
//
private EventDescriptorCollection MergeEvents(Type objectType, EventDescriptorCollection incoming) {
EventDescriptor[] array = new EventDescriptor[incoming.Count];
for (int idx = 0; idx < array.Length; idx++) {
EventDescriptor theirs = incoming[idx];
EventDescriptor ours = (EventDescriptor)GetCachedDescriptor(objectType, theirs);
if (ours == null) {
ours = new MetadataStoreEventDescriptor(objectType, theirs);
CacheDescriptor(objectType, theirs, ours);
}
array[idx] = ours;
}
return new EventDescriptorCollection(array, true);
}
//
// Takes a collection of properties and merges them with our own descriptors.
//
private PropertyDescriptorCollection MergeProperties(Type objectType, PropertyDescriptorCollection incoming) {
PropertyDescriptor[] array = new PropertyDescriptor[incoming.Count];
for (int idx = 0; idx < array.Length; idx++) {
PropertyDescriptor theirs = incoming[idx];
PropertyDescriptor ours = (PropertyDescriptor)GetCachedDescriptor(objectType, theirs);
if (ours == null) {
ours = new MetadataStorePropertyDescriptor(objectType, theirs);
CacheDescriptor(objectType, theirs, ours);
}
array[idx] = ours;
}
return new PropertyDescriptorCollection(array, true);
}
//
// Looks at objectType and returns a wrapped type if needed. The
// parameter may be null, in which case this API returns null.
//
internal Type MergeType(Type objectType) {
if (objectType == null) return null;
return MergeTypeInternal(objectType, null);
}
//
// Helper method for both MergeType and GetReflectionType
//
private Type MergeTypeInternal(Type objectType, object instance) {
// If the incoming object type is already one of our wrapped types,
// there is nothing more for us to do
if (objectType is MetadataType) return objectType;
Type baseReflectionType = base.GetReflectionType(objectType, instance);
Type reflectionType;
lock (_syncLock) {
if (_metadataTypeCache == null || !_metadataTypeCache.TryGetValue(baseReflectionType, out reflectionType)) {
// See if we need to build a custom type for this objectType
bool containsAttributes = false;
foreach (AttributeTable table in _tables) {
if (table.ContainsAttributes(objectType)) {
containsAttributes = true;
break;
}
}
// If we failed to find attributes quickly, we need
// to check base classes and interfaces.
if (!containsAttributes) {
foreach (AttributeTable table in _tables) {
foreach (Type t in table.AttributedTypes) {
if (t.IsAssignableFrom(objectType)) {
containsAttributes = true;
break;
}
}
}
}
// If we have a table that contains attributes for this type, we need
// to wrap the type in our own reflection type. If not, we will
// store baseReflectionType in the cache slot.
if (containsAttributes) {
reflectionType = new MetadataType(baseReflectionType, _tables, this);
}
else {
reflectionType = baseReflectionType;
}
if (_metadataTypeCache == null) {
_metadataTypeCache = new Dictionary();
}
_metadataTypeCache[baseReflectionType] = reflectionType;
}
}
return reflectionType;
}
//
// This method is the metadata store's "master hook". It will return a custom
// "MetadataType" for all types that have custom metadata declared in the
// attribute table. By infusing our custom metadata at this low level,
// everything that builds on top of reflection can be accomodated.
//
public override Type GetReflectionType(Type objectType, object instance) {
if (objectType == null) throw FxTrace.Exception.ArgumentNull("objectType");
return MergeTypeInternal(objectType, instance);
}
//
// Returns a custom type descriptor for the given object
//
public override ICustomTypeDescriptor GetTypeDescriptor(Type objectType, object instance) {
ICustomTypeDescriptor descriptor = base.GetTypeDescriptor(objectType, instance);
descriptor = new MetadataStoreTypeDescriptor(this, objectType, descriptor);
return descriptor;
}
//
// A descriptor key is a dictionary key used by
// our member descriptor cache. The key consists of a type
// and a member descriptor.
//
private struct DescriptorKey : IEquatable {
internal readonly Type Type;
internal readonly MemberDescriptor Member;
internal DescriptorKey(Type type, MemberDescriptor member) {
Type = type;
Member = member;
}
public override int GetHashCode() {
int hash = Type.GetHashCode();
if (Member != null) {
hash ^= Member.GetHashCode();
}
return hash;
}
public override bool Equals(object obj) {
return Equals((DescriptorKey)obj);
}
public static bool operator ==(DescriptorKey a, DescriptorKey b) {
return a.Equals(b);
}
public static bool operator !=(DescriptorKey a, DescriptorKey b) {
return !a.Equals(b);
}
#if DEBUG
public override string ToString() {
string v = Type.FullName;
if (Member != null) v = string.Concat(v, ".", Member);
return v;
}
#endif
// IEquatable Members
public bool Equals(DescriptorKey other) {
if (Type != other.Type) return false;
return object.ReferenceEquals(Member, other.Member);
}
}
//
// This type descriptor is what provides additional metadata.
// We implement ICustomTypeDescriptor ourselves, rather than
// derive from the helper CustomTypeDescriptor class because
// we want this implementation to be built on a struct for
// performance reasons.
//
private struct MetadataStoreTypeDescriptor : ICustomTypeDescriptor {
private MetadataStoreProvider _provider;
private Type _objectType;
private ICustomTypeDescriptor _parent;
internal MetadataStoreTypeDescriptor(MetadataStoreProvider provider, Type objectType, ICustomTypeDescriptor parent) {
_provider = provider;
_objectType = objectType;
_parent = parent;
}
// ICustomTypeDescriptor Members
// Calls that just forward the the parent API
string ICustomTypeDescriptor.GetClassName() { return _parent.GetClassName(); }
string ICustomTypeDescriptor.GetComponentName() { return _parent.GetComponentName(); }
TypeConverter ICustomTypeDescriptor.GetConverter() { return _parent.GetConverter(); }
EventDescriptor ICustomTypeDescriptor.GetDefaultEvent() { return _parent.GetDefaultEvent(); }
PropertyDescriptor ICustomTypeDescriptor.GetDefaultProperty() { return _parent.GetDefaultProperty(); }
object ICustomTypeDescriptor.GetEditor(Type editorBaseType) { return _parent.GetEditor(editorBaseType); }
object ICustomTypeDescriptor.GetPropertyOwner(PropertyDescriptor pd) { return _parent.GetPropertyOwner(pd); }
//
// Override to provide merged metadata
//
AttributeCollection ICustomTypeDescriptor.GetAttributes() {
return _provider.GetAttributes(_objectType);
}
//
// Override to provide merged metadata
//
EventDescriptorCollection ICustomTypeDescriptor.GetEvents(Attribute[] attributes) {
return _provider.MergeEvents(_objectType, _parent.GetEvents(attributes));
}
//
// Override to provide merged metadata
//
EventDescriptorCollection ICustomTypeDescriptor.GetEvents() {
return _provider.MergeEvents(_objectType, _parent.GetEvents());
}
//
// Override to provide merged metadata
//
PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties(Attribute[] attributes) {
return _provider.MergeProperties(_objectType, _parent.GetProperties(attributes));
}
//
// Override to provide merged metadata
//
PropertyDescriptorCollection ICustomTypeDescriptor.GetProperties() {
return _provider.MergeProperties(_objectType, _parent.GetProperties());
}
}
//
// A property descriptor that adds additional metadata to an existing
// property descriptor.
//
private class MetadataStorePropertyDescriptor : PropertyDescriptor {
private static readonly object _noValue = new object();
private static readonly object _invalidValue = new object();
private Type _objectType;
private PropertyDescriptor _parent;
private AttributeCollection _attributes;
private Attribute[] _rawAttributes;
private object _defaultValue = _invalidValue;
private object _ambientValue = _invalidValue;
// There are simpler base ctors we can invoke that do attribute merging for us. However,
// they do it all up front instead of deferring. We want to defer until someone actually
// asks for attributes.
internal MetadataStorePropertyDescriptor(Type objectType, PropertyDescriptor parent)
: base(parent.Name, null) {
_objectType = objectType;
_parent = parent;
}
//
// Return our attribute collection. We cache it
// for speed.
//
public override AttributeCollection Attributes {
get {
CheckAttributesValid();
if (_attributes == null) {
_attributes = MetadataStoreProvider.CreateAttributeCollection(_rawAttributes);
}
return _attributes;
}
}
//
// DefaultValue and AmbientValue are two values that are used by
// ReflectTypeDescriptionProvider in ResetValue(), CanResetValue(),
// and ShouldSerializeValue() in such a way that by-passes any additional
// values provided by the MetadataStore. As such, we manually look up
// these two attributes ourselves to keep the MetadataStore functionality
// intact.
//
private object DefaultValue {
get {
if (_defaultValue == _invalidValue) {
DefaultValueAttribute dva = (DefaultValueAttribute) Attributes[typeof(DefaultValueAttribute)];
if (dva != null) {
_defaultValue = dva.Value;
}
else {
_defaultValue = _noValue;
}
}
return _defaultValue;
}
}
//
// See comment for DefaultValue
//
private object AmbientValue {
get {
if (_ambientValue == _invalidValue) {
AmbientValueAttribute ava = (AmbientValueAttribute)Attributes[typeof(AmbientValueAttribute)];
if (ava != null) {
_ambientValue = ava.Value;
}
else {
_ambientValue = _noValue;
}
}
return _ambientValue;
}
}
//
// This is a little strange and merits some explanation.
// We want to cache our attribute collection, but we need
// to know when to invalidate the cache. MemberDescriptor
// has an internal version stamp that it compares with
// TypeDescriptor's metadata version and automatically invalidates
// its own cached values for attributes. The trick is
// we need to know when MemberDescriptor invalidated its
// cached values. We do this by keying off the fact that
// MemberDescriptor will call FillAttributes when its cache
// needs to be repopulated. But, in oder to get MemberDescriptor
// to look at its cache we must access an API that requires
// cached data. AttributeArray does this in the lightest
// possible way. The actual set of attributes in the array
// is always an empty set, but we don't care; we only need
// to access the property. The return value of the API
// and the check for length are only here so the compiler
// and FXCop do not complain about us calling a property
// and not using the return value. The attribute array
// always contains zero elements.
//
private bool CheckAttributesValid() {
Fx.Assert(AttributeArray.Length == 0, "Attribute array should always contain zero elements");
return AttributeArray.Length == 0 && _attributes != null;
}
//
// This method is called when we need to populate the raw set of
// attributes for this property.
//
protected override void FillAttributes(IList attributeList) {
_attributes = null;
_defaultValue = _invalidValue;
_ambientValue = _invalidValue;
_rawAttributes = MetadataStoreProvider.GetRawAttributes(_objectType, Name, _parent, false);
base.FillAttributes(attributeList);
}
// PropertyDescriptor API.
public override bool CanResetValue(object component) {
if (DefaultValue != _noValue) {
object currentValue = GetValue(component);
return !object.Equals(currentValue, DefaultValue);
}
else if (AmbientValue != _noValue) {
object currentValue = GetValue(component);
return !object.Equals(currentValue, AmbientValue);
}
else {
return _parent.CanResetValue(component);
}
}
public override void ResetValue(object component) {
if (DefaultValue != _noValue) {
SetValue(component, DefaultValue);
}
else if (AmbientValue != _noValue) {
SetValue(component, AmbientValue);
}
else {
_parent.ResetValue(component);
}
}
public override bool ShouldSerializeValue(object component) {
if (DefaultValue != _noValue) {
object currentValue = GetValue(component);
return !object.Equals(currentValue, DefaultValue);
}
else if (AmbientValue != _noValue) {
object currentValue = GetValue(component);
return !object.Equals(currentValue, AmbientValue);
}
else {
return _parent.ShouldSerializeValue(component);
}
}
public override void AddValueChanged(object component, EventHandler handler) { _parent.AddValueChanged(component, handler); }
public override Type ComponentType { get { return _parent.ComponentType; } }
[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes", Justification = "Propagating the error might cause VS to crash")]
[SuppressMessage("Reliability", "Reliability108", Justification = "Propagating the error might cause VS to crash")]
public override object GetValue(object component)
{
object retValue = null;
try
{
retValue = _parent.GetValue(component);
}
catch (System.Exception)
{
// GetValue throws an exception if Value is not available
}
return retValue;
}
public override bool IsReadOnly { get { return _parent.IsReadOnly || Attributes.Contains(ReadOnlyAttribute.Yes); } }
public override Type PropertyType { get { return _parent.PropertyType; } }
public override void SetValue(object component, object value) { _parent.SetValue(component, value); }
public override void RemoveValueChanged(object component, EventHandler handler) { _parent.RemoveValueChanged(component, handler); }
public override bool SupportsChangeEvents { get { return _parent.SupportsChangeEvents; } }
}
//
// An event descriptor that adds additional metadata to an existing
// event descriptor.
//
private class MetadataStoreEventDescriptor : EventDescriptor {
private Type _objectType;
private EventDescriptor _parent;
// There are simpler base ctors we can invoke that do attribute merging for us. However,
// they do it all up front instead of deferring. We want to defer until someone actually
// asks for attributes.
internal MetadataStoreEventDescriptor(Type objectType, EventDescriptor parent)
: base(parent.Name, null) {
_objectType = objectType;
_parent = parent;
}
//
// We override this so we can merge in our additional attributes.
// By overriding here, we wait until someone actually asks for
// attributes before merging.
//
protected override AttributeCollection CreateAttributeCollection() {
Attribute[] attrs = MetadataStoreProvider.GetRawAttributes(_objectType, Name, _parent, true);
// We must let MemberDescriptor build its attributes, even if we're going
// to replace them. The reason for this is that MemberDescriptor keeps an
// internal version stamp. This version stamp changes when someone adds
// a new TypeDescriptionProvider. If we don't let MemberDescriptor maintain
// this version stamp it won't invalidate metadata when someone adds or removes
// a TypeDescriptionProvider, which can cause us to return stale data.
AttributeArray = attrs;
AttributeCollection attributes = base.CreateAttributeCollection(); // do not delete this
attributes = MetadataStoreProvider.CreateAttributeCollection(attrs);
return attributes;
}
// EventDescriptor API
public override void AddEventHandler(object component, Delegate value) { _parent.AddEventHandler(component, value); }
public override Type ComponentType { get { return _parent.ComponentType; } }
public override Type EventType { get { return _parent.EventType; } }
public override bool IsMulticast { get { return _parent.IsMulticast; } }
public override void RemoveEventHandler(object component, Delegate value) { _parent.RemoveEventHandler(component, value); }
}
}
//
// This type is the core of our metadata store. We offer this through our type
// description provider as the "reflection type" that should be used during
// reflection operations. All things within TypeDescriptor will use this
// type to get metadata, which gives us a big hook into their mechanism.
// By hooking at this low level we can be sure to cover all of our bases.
//
private class MetadataType : Type {
private Type _baseReflectionType;
private AttributeTable[] _tables;
private MetadataStoreProvider _provider;
private Dictionary _memberCache;
private Hashtable _seenAttributes;
private AttributeMergeCache _cache;
private object _syncLock = new object();
internal MetadataType(Type baseReflectionType, AttributeTable[] tables, MetadataStoreProvider provider) {
_baseReflectionType = baseReflectionType;
_tables = tables;
_provider = provider;
}
// Type Forward APIs
//
// The majority of Type's API is just forwarded to our base reflection
// type.
//
public override Guid GUID { get { return _baseReflectionType.GUID; } }
public override Assembly Assembly { get { return _baseReflectionType.Assembly; } }
public override string AssemblyQualifiedName { get { return _baseReflectionType.AssemblyQualifiedName; } }
public override bool ContainsGenericParameters { get { return _baseReflectionType.ContainsGenericParameters; } }
public override MethodBase DeclaringMethod { get { return _baseReflectionType.DeclaringMethod; } }
public override RuntimeTypeHandle TypeHandle { get { return _baseReflectionType.TypeHandle; } }
public override int GetHashCode() { return _baseReflectionType.GetHashCode(); }
public override string FullName { get { return _baseReflectionType.FullName; } }
public override GenericParameterAttributes GenericParameterAttributes { get { return _baseReflectionType.GenericParameterAttributes; } }
public override int GenericParameterPosition { get { return _baseReflectionType.GenericParameterPosition; } }
public override int GetArrayRank() { return _baseReflectionType.GetArrayRank(); }
protected override TypeAttributes GetAttributeFlagsImpl() { return _baseReflectionType.Attributes; }
protected override ConstructorInfo GetConstructorImpl(BindingFlags bindingAttr, Binder binder, CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers) { return _baseReflectionType.GetConstructor(bindingAttr, binder, callConvention, types, modifiers); }
public override ConstructorInfo[] GetConstructors(BindingFlags bindingAttr) { return _baseReflectionType.GetConstructors(bindingAttr); }
public override FieldInfo GetField(string name, BindingFlags bindingAttr) { return _baseReflectionType.GetField(name, bindingAttr); }
public override FieldInfo[] GetFields(BindingFlags bindingAttr) { return _baseReflectionType.GetFields(bindingAttr); }
protected override bool HasElementTypeImpl() { return _baseReflectionType.HasElementType; }
public override object InvokeMember(string name, BindingFlags invokeAttr, Binder binder, object target, object[] args, ParameterModifier[] modifiers, System.Globalization.CultureInfo culture, string[] namedParameters) { return _baseReflectionType.InvokeMember(name, invokeAttr, binder, target, args, modifiers, culture, namedParameters); }
protected override bool IsArrayImpl() { return _baseReflectionType.IsArray; }
protected override bool IsByRefImpl() { return _baseReflectionType.IsByRef; }
protected override bool IsCOMObjectImpl() { return _baseReflectionType.IsCOMObject; }
protected override bool IsPointerImpl() { return _baseReflectionType.IsPointer; }
protected override bool IsPrimitiveImpl() { return _baseReflectionType.IsPrimitive; }
public override Module Module { get { return _baseReflectionType.Module; } }
public override string Namespace { get { return _baseReflectionType.Namespace; } }
public override Type UnderlyingSystemType { get { return _baseReflectionType.UnderlyingSystemType; } }
public override string Name { get { return _baseReflectionType.Name; } }
public override InterfaceMapping GetInterfaceMap(Type interfaceType) { return _baseReflectionType.GetInterfaceMap(interfaceType); }
public override bool IsAssignableFrom(Type c) { return _baseReflectionType.IsAssignableFrom(c); }
protected override bool IsContextfulImpl() { return _baseReflectionType.IsContextful; }
public override bool IsGenericParameter { get { return _baseReflectionType.IsGenericParameter; } }
public override bool IsGenericType { get { return _baseReflectionType.IsGenericType; } }
public override bool IsGenericTypeDefinition { get { return _baseReflectionType.IsGenericTypeDefinition; } }
public override bool IsInstanceOfType(object o) { return _baseReflectionType.IsInstanceOfType(o); }
protected override bool IsMarshalByRefImpl() { return _baseReflectionType.IsMarshalByRef; }
public override bool IsSubclassOf(Type c) { return _baseReflectionType.IsSubclassOf(c); }
protected override bool IsValueTypeImpl() { return _baseReflectionType.IsValueType; }
public override Type MakeArrayType() { return _baseReflectionType.MakeArrayType(); }
public override Type MakeArrayType(int rank) { return _baseReflectionType.MakeArrayType(rank); }
public override Type MakeByRefType() { return _baseReflectionType.MakeByRefType(); }
public override Type MakeGenericType(params Type[] typeArguments) { return _baseReflectionType.MakeGenericType(typeArguments); }
public override Type MakePointerType() { return _baseReflectionType.MakePointerType(); }
public override MemberTypes MemberType { get { return _baseReflectionType.MemberType; } }
public override int MetadataToken { get { return _baseReflectionType.MetadataToken; } }
public override Type ReflectedType { get { return _baseReflectionType.ReflectedType; } }
public override System.Runtime.InteropServices.StructLayoutAttribute StructLayoutAttribute { get { return _baseReflectionType.StructLayoutAttribute; } }
public override string ToString() { return _baseReflectionType.ToString(); }
// Type APIs
//
// Wrap returned types
//
public override Type GetElementType() {
return _provider.MergeType(_baseReflectionType.GetElementType());
}
//
// Wrap returned types
//
public override Type DeclaringType {
get { return _provider.MergeType(_baseReflectionType.DeclaringType); }
}
//
// Wrap returned types
//
public override Type[] FindInterfaces(TypeFilter filter, object filterCriteria) {
Type[] ifaces = _baseReflectionType.FindInterfaces(filter, filterCriteria);
for (int idx = 0; idx < ifaces.Length; idx++) {
ifaces[idx] = _provider.MergeType(ifaces[idx]);
}
return ifaces;
}
//
// Wrap returned types
//
public override Type BaseType {
get { return _provider.MergeType(_baseReflectionType.BaseType); }
}
//
// Wrap returned types
//
public override Type GetInterface(string name, bool ignoreCase) {
return _provider.MergeType(_baseReflectionType.GetInterface(name, ignoreCase));
}
//
// Wrap returned types
//
public override Type[] GetInterfaces() {
Type[] ifaces = _baseReflectionType.GetInterfaces();
for (int idx = 0; idx < ifaces.Length; idx++) {
ifaces[idx] = _provider.MergeType(ifaces[idx]);
}
return ifaces;
}
//
// Wrap returned types
//
public override Type GetNestedType(string name, BindingFlags bindingAttr) {
return _provider.MergeType(_baseReflectionType.GetNestedType(name, bindingAttr));
}
//
// Wrap returned types
//
public override Type[] GetNestedTypes(BindingFlags bindingAttr) {
Type[] ifaces = _baseReflectionType.GetNestedTypes(bindingAttr);
for (int idx = 0; idx < ifaces.Length; idx++) {
ifaces[idx] = _provider.MergeType(ifaces[idx]);
}
return ifaces;
}
//
// Wrap returned types
//
public override Type[] GetGenericArguments() {
Type[] ifaces = _baseReflectionType.GetGenericArguments();
for (int idx = 0; idx < ifaces.Length; idx++) {
ifaces[idx] = _provider.MergeType(ifaces[idx]);
}
return ifaces;
}
//
// Wrap returned types
//
public override Type[] GetGenericParameterConstraints() {
Type[] ifaces = _baseReflectionType.GetGenericParameterConstraints();
for (int idx = 0; idx < ifaces.Length; idx++) {
ifaces[idx] = _provider.MergeType(ifaces[idx]);
}
return ifaces;
}
//
// Wrap returned types
//
public override Type GetGenericTypeDefinition() {
return _provider.MergeType(_baseReflectionType.GetGenericTypeDefinition());
}
//
// Custom attribute access
//
public override object[] GetCustomAttributes(bool inherit) {
return MergeAttributes(null, _baseReflectionType, inherit, ref _cache);
}
//
// Custom attribute access
//
public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
return MergeAttributes(attributeType, _baseReflectionType, inherit, ref _cache);
}
//
// Custom attribute access
//
public override bool IsDefined(Type attributeType, bool inherit) {
bool isDefined = _baseReflectionType.IsDefined(attributeType, inherit);
if (!isDefined) isDefined = IsDefinedInTable(attributeType, null, inherit);
return isDefined;
}
//
// Member access
//
public override MemberInfo[] FindMembers(MemberTypes memberType, BindingFlags bindingAttr, MemberFilter filter, object filterCriteria) {
MemberInfo[] infos = _baseReflectionType.FindMembers(memberType, bindingAttr, filter, filterCriteria);
return MergeMembers(infos);
}
//
// Member access
//
public override MemberInfo[] GetDefaultMembers() {
MemberInfo[] infos = _baseReflectionType.GetDefaultMembers();
return MergeMembers(infos);
}
//
// Member access
//
public override MemberInfo[] GetMember(string name, MemberTypes type, BindingFlags bindingAttr) {
MemberInfo[] infos = _baseReflectionType.GetMember(name, type, bindingAttr);
return MergeMembers(infos);
}
//
// Member access
//
public override MemberInfo[] GetMember(string name, BindingFlags bindingAttr) {
MemberInfo[] infos = _baseReflectionType.GetMember(name, bindingAttr);
return MergeMembers(infos);
}
//
// Member access
//
public override MemberInfo[] GetMembers(BindingFlags bindingAttr) {
MemberInfo[] infos = _baseReflectionType.GetMembers(bindingAttr);
return MergeMembers(infos);
}
//
// Event access
//
public override EventInfo GetEvent(string name, BindingFlags bindingAttr) {
EventInfo info = _baseReflectionType.GetEvent(name, bindingAttr);
return MergeEvent(info);
}
//
// Event access
//
public override EventInfo[] GetEvents() {
EventInfo[] infos = _baseReflectionType.GetEvents();
return MergeEvents(infos);
}
//
// Event access
//
public override EventInfo[] GetEvents(BindingFlags bindingAttr) {
EventInfo[] infos = _baseReflectionType.GetEvents(bindingAttr);
return MergeEvents(infos);
}
//
// Method access
//
protected override MethodInfo GetMethodImpl(string name, BindingFlags bindingAttr, Binder binder, CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers) {
MethodInfo info;
if (types == null) {
info = _baseReflectionType.GetMethod(name, bindingAttr);
}
else {
info = _baseReflectionType.GetMethod(name, bindingAttr, binder, callConvention, types, modifiers);
}
if (info != null) {
info = MergeMethod(info);
}
return info;
}
//
// Method access
//
public override MethodInfo[] GetMethods(BindingFlags bindingAttr) {
MethodInfo[] infos = _baseReflectionType.GetMethods(bindingAttr);
return MergeMethods(infos);
}
//
// Property access
//
public override PropertyInfo[] GetProperties(BindingFlags bindingAttr) {
PropertyInfo[] infos = _baseReflectionType.GetProperties(bindingAttr);
return MergeProperties(infos);
}
//
// Property access
//
protected override PropertyInfo GetPropertyImpl(string name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers) {
PropertyInfo info;
if (types != null) {
info = _baseReflectionType.GetProperty(name, bindingAttr, binder, returnType, types, modifiers);
}
else {
info = _baseReflectionType.GetProperty(name, bindingAttr);
}
return MergeProperty(info);
}
// Merging APIs
//
// Returns true if the given attribute type is defined in any attribute table.
// This can take null for the member, in which case it searches type attributes.
// Table is assigned at construction and read-only, so no locking required.
//
private bool IsDefinedInTable(Type attributeType, MemberInfo member, bool inherit) {
bool isDefined = false;
for (Type t = UnderlyingSystemType; t != null && !isDefined; t = t.BaseType) {
foreach (AttributeTable table in _tables) {
IEnumerable attrEnum;
if (member == null) {
attrEnum = table.GetCustomAttributes(t);
}
else {
attrEnum = table.GetCustomAttributes(t, member);
}
foreach (object a in attrEnum) {
if (attributeType.IsInstanceOfType(a)) {
isDefined = true;
break;
}
}
if (isDefined) break;
}
if (!inherit) break;
}
return isDefined;
}
//
// Merging of an array of attributes. This is called from
// GetCustomAttributes for both types and members. Attributes
// must be merged so the most derived and highest priority
// attributes are first in the list. Metadata store attributes
// always take higher precidence than CLR attributes.
//
[SuppressMessage("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")]
private object[] MergeAttributes(Type filterType, MemberInfo member, bool inherit, ref AttributeMergeCache cache) {
Type currentType = UnderlyingSystemType;
MemberInfo currentMember = member;
if (cache == null) cache = new AttributeMergeCache();
if (cache.FilterType != filterType ||
cache.Member != member ||
cache.Inherit != inherit) {
cache.FilterType = filterType;
cache.Member = member;
cache.Inherit = inherit;
if (cache.Cache != null) cache.Cache.Clear();
}
else if (cache.Cache != null) {
// Cache is valid; return it
return (object[])cache.Cache.ToArray(filterType ?? typeof(object));
}
// Cache is invalid or null. Walk attributes.
if (cache.Cache == null) cache.Cache = new ArrayList();
ArrayList compiledAttributes = cache.Cache;
lock (_syncLock) {
if (_seenAttributes == null) {
_seenAttributes = new Hashtable();
}
else {
_seenAttributes.Clear();
}
bool firstIteration = true;
bool isType = member is Type;
bool includeClrAttributes = (isType || currentMember.DeclaringType == currentType);
while (currentType != null && currentMember != null) {
foreach (object attr in MergeAttributesIterator(currentType, currentMember, includeClrAttributes)) {
if (filterType != null && !filterType.IsAssignableFrom(attr.GetType()))
continue;
AttributeData attrData = AttributeDataCache.GetAttributeData(attr.GetType());
bool haveSeenBefore = _seenAttributes.ContainsKey(attrData.AttributeType);
// Can we have more than one?
if (haveSeenBefore &&
!attrData.AllowsMultiple)
continue;
// Is this attribute inheritable?
if (!firstIteration &&
!attrData.IsInheritable)
continue;
// We do a scan here for TypeDescriptionProviderAttribute. Because we
// are creating a custom type here and gathering metadata from
// our base type, it is very important that we don't offer this attribute.
// Doing so could cause TypeDescriptor to add a provider for this type
// and create a cycle
if (attrData.AttributeType.Equals(typeof(TypeDescriptionProviderAttribute)))
continue;
compiledAttributes.Add(attr);
_seenAttributes[attrData.AttributeType] = attr;
}
// Continue?
if (!inherit)
break;
// Advance up the type hierarchy
//
// Note: CLR attributes key off of currentMember. MetadataStore attributes key
// off of currentType and memberName. Because we advance currentType independent of
// currentMember, it is possible for the currentMember to belong to some
// ancestor of currentType. As such, we wait with advancing currentMember until
// currentType catches up. While we wait, we do not include the CLR attributes in
// the mix because they would be added multiple times as a result.
// Is currentType caught up to currentMember.DeclaringType?
if (isType || currentMember.DeclaringType == currentType) {
currentMember = AttributeDataCache.GetBaseMemberInfo(currentMember);
}
currentType = currentType.BaseType;
if (isType || currentMember == null || currentMember.DeclaringType == currentType) {
includeClrAttributes = true;
}
else {
includeClrAttributes = false;
}
firstIteration = false;
}
}
return (object[])compiledAttributes.ToArray(filterType ?? typeof(object));
}
//
// Enumerates through values contained in the attribute cache in
// an order that returns the MetadataStore attributes before returning
// the CLR attributes (if requested)
//
private IEnumerable MergeAttributesIterator(Type type, MemberInfo member, bool includeClrAttributes) {
// MetadataStore uses member name string, instead of MemberInfo to store custom attributes,
// so figure out what the member name is. For types, it will be null.
string memberName = GetMemberName(member);
// Go through the MetadataStore attributes first, as they take precedence over CLR attributes
foreach (object attr in AttributeDataCache.GetMetadataStoreAttributes(type, memberName, _tables))
yield return attr;
if (includeClrAttributes) {
// Go through the CLR attributes second
foreach (object attr in AttributeDataCache.GetClrAttributes(member))
yield return attr;
}
}
//
// Gets the member name from the specified MemberInfo that we use as key
// to get custom attributes from the MetadataStore. Types will return null.
//
private static string GetMemberName(MemberInfo member) {
if (member is Type)
return null;
// The only methods supported in metadata store are those related to
// Get methods for DependencyProperties and they start with a "Get..."
if (member.MemberType == MemberTypes.Method) {
Fx.Assert(
member.Name.StartsWith("Get", StringComparison.Ordinal) &&
member.Name.Length > 3,
"MetadataStore expects to only see Get[Foo] or Set[Foo] MethodInfos");
return member.Name.Substring(3);
}
return member.Name;
}
//
// Merging of an event.
//
private EventInfo MergeEvent(EventInfo info) {
if (info == null) return null;
MemberInfo cache;
lock (_syncLock) {
if (_memberCache == null || !_memberCache.TryGetValue(info, out cache)) {
if (_memberCache == null) {
_memberCache = new Dictionary();
}
EventInfo newInfo = new MetadataEventInfo(info, this);
_memberCache[info] = newInfo;
info = newInfo;
}
else {
info = (EventInfo)cache;
}
}
return info;
}
//
// Merging of an array of events.
//
private EventInfo[] MergeEvents(EventInfo[] infos) {
for (int idx = 0; idx < infos.Length; idx++) {
infos[idx] = MergeEvent(infos[idx]);
}
return infos;
}
//
// Merging a generic member calls down to specific
// merge functions based on the type of the member.
//
private MemberInfo MergeMember(MemberInfo info) {
MethodInfo m;
PropertyInfo p;
EventInfo e;
if ((m = info as MethodInfo) != null) {
return MergeMethod(m);
}
else if ((p = info as PropertyInfo) != null) {
return MergeProperty(p);
}
else if ((e = info as EventInfo) != null) {
return MergeEvent(e);
}
return info;
}
//
// Merging a generic member calls down to specific
// merge functions based on the type of the member.
//
private MemberInfo[] MergeMembers(MemberInfo[] infos) {
for (int idx = 0; idx < infos.Length; idx++) {
infos[idx] = MergeMember(infos[idx]);
}
return infos;
}
//
// Merging of a method. We only deal with
// static methods in the format Get
// so we can support attached properties. Otherwise,
// we let the method be.
//
private MethodInfo MergeMethod(MethodInfo info) {
if (info == null) return null;
if (info.IsStatic && info.Name.StartsWith("Get", StringComparison.Ordinal)) {
MemberInfo cache;
lock (_syncLock) {
if (_memberCache == null || !_memberCache.TryGetValue(info, out cache)) {
if (_memberCache == null) {
_memberCache = new Dictionary();
}
MethodInfo newInfo = new MetadataMethodInfo(info, this);
_memberCache[info] = newInfo;
info = newInfo;
}
else {
info = (MethodInfo)cache;
}
}
}
return info;
}
//
// Merging of an array of methods.
//
private MethodInfo[] MergeMethods(MethodInfo[] infos) {
for (int idx = 0; idx < infos.Length; idx++) {
infos[idx] = MergeMethod(infos[idx]);
}
return infos;
}
//
// Merging of a property.
//
private PropertyInfo MergeProperty(PropertyInfo info) {
if (info == null) return null;
MemberInfo cache;
lock (_syncLock) {
if (_memberCache == null || !_memberCache.TryGetValue(info, out cache)) {
if (_memberCache == null) {
_memberCache = new Dictionary();
}
PropertyInfo newInfo = new MetadataPropertyInfo(info, this);
_memberCache[info] = newInfo;
info = newInfo;
}
else {
info = (PropertyInfo)cache;
}
}
return info;
}
//
// Merging of an array of properties.
//
private PropertyInfo[] MergeProperties(PropertyInfo[] infos) {
for (int idx = 0; idx < infos.Length; idx++) {
infos[idx] = MergeProperty(infos[idx]);
}
return infos;
}
//
// A simple class that holds merged attribute data.
//
private class AttributeMergeCache {
internal Type FilterType;
internal bool Inherit;
internal ArrayList Cache;
internal MemberInfo Member;
}
//
// A property info that contains our custom metadata.
//
private class MetadataPropertyInfo : PropertyInfo {
private PropertyInfo _info;
private MetadataType _type;
private AttributeMergeCache _cache;
internal MetadataPropertyInfo(PropertyInfo info, MetadataType type) {
_info = info;
_type = type;
}
//
// PropertyInfo overrides
//
public override PropertyAttributes Attributes { get { return _info.Attributes; } }
public override bool CanRead { get { return _info.CanRead; } }
public override bool CanWrite { get { return _info.CanWrite; } }
public override MethodInfo[] GetAccessors(bool nonPublic) { return _info.GetAccessors(nonPublic); }
public override MethodInfo GetGetMethod(bool nonPublic) { return _info.GetGetMethod(nonPublic); }
public override ParameterInfo[] GetIndexParameters() { return _info.GetIndexParameters(); }
public override MethodInfo GetSetMethod(bool nonPublic) { return _info.GetSetMethod(nonPublic); }
public override object GetValue(object obj, BindingFlags invokeAttr, Binder binder, object[] index, CultureInfo culture) { return _info.GetValue(obj, invokeAttr, binder, index, culture); }
public override Type PropertyType { get { return _info.PropertyType; } }
public override void SetValue(object obj, object value, BindingFlags invokeAttr, Binder binder, object[] index, CultureInfo culture) { _info.SetValue(obj, value, invokeAttr, binder, index, culture); }
public override Type DeclaringType { get { return _info.DeclaringType; } }
public override string Name { get { return _info.Name; } }
public override Type ReflectedType { get { return _info.ReflectedType; } }
public override bool Equals(object obj) { return object.ReferenceEquals(this, obj); }
public override int GetHashCode() { return _info.GetHashCode(); }
public override object GetConstantValue() { return _info.GetConstantValue(); }
public override Type[] GetOptionalCustomModifiers() { return _info.GetOptionalCustomModifiers(); }
public override object GetRawConstantValue() { return _info.GetRawConstantValue(); }
public override Type[] GetRequiredCustomModifiers() { return _info.GetRequiredCustomModifiers(); }
public override object GetValue(object obj, object[] index) { return _info.GetValue(obj, index); }
public override MemberTypes MemberType { get { return _info.MemberType; } }
public override int MetadataToken { get { return _info.MetadataToken; } }
public override Module Module { get { return _info.Module; } }
public override void SetValue(object obj, object value, object[] index) { _info.SetValue(obj, value, index); }
public override string ToString() { return _info.ToString(); }
//
// Merges our custom attributes in with those of the member info.
//
public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
return _type.MergeAttributes(attributeType, _info, inherit, ref _cache);
}
//
// Merges our custom attributes in with those of the member info.
//
public override object[] GetCustomAttributes(bool inherit) {
return _type.MergeAttributes(null, _info, inherit, ref _cache);
}
//
// Determines if an attribute exists in the member info
// or in our own code.
//
public override bool IsDefined(Type attributeType, bool inherit) {
bool isDefined = _info.IsDefined(attributeType, inherit);
if (!isDefined) isDefined = _type.IsDefinedInTable(attributeType, _info, inherit);
return isDefined;
}
}
//
// An EventInfo that provides our custom attributes.
//
private class MetadataEventInfo : EventInfo {
private EventInfo _info;
private MetadataType _type;
private AttributeMergeCache _cache;
internal MetadataEventInfo(EventInfo info, MetadataType type) {
_info = info;
_type = type;
}
//
// EventInfo overrides
//
public override EventAttributes Attributes { get { return _info.Attributes; } }
public override string Name { get { return _info.Name; } }
public override Type ReflectedType { get { return _info.ReflectedType; } }
public override bool Equals(object obj) { return object.ReferenceEquals(this, obj); }
public override int GetHashCode() { return _info.GetHashCode(); }
public override MethodInfo[] GetOtherMethods(bool nonPublic) { return _info.GetOtherMethods(nonPublic); }
public override MemberTypes MemberType { get { return _info.MemberType; } }
public override int MetadataToken { get { return _info.MetadataToken; } }
public override Module Module { get { return _info.Module; } }
public override string ToString() { return _info.ToString(); }
public override MethodInfo GetAddMethod(bool nonPublic) { return _info.GetAddMethod(nonPublic); }
public override MethodInfo GetRaiseMethod(bool nonPublic) { return _info.GetRaiseMethod(nonPublic); }
public override MethodInfo GetRemoveMethod(bool nonPublic) { return _info.GetRemoveMethod(nonPublic); }
public override Type DeclaringType { get { return _info.DeclaringType; } }
//
// Merges our custom attributes in with those of the member info.
//
public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
return _type.MergeAttributes(attributeType, _info, inherit, ref _cache);
}
//
// Merges our custom attributes in with those of the member info.
//
public override object[] GetCustomAttributes(bool inherit) {
return _type.MergeAttributes(null, _info, inherit, ref _cache);
}
//
// Determines if an attribute exists in the member info
// or in our own code.
//
public override bool IsDefined(Type attributeType, bool inherit) {
bool isDefined = _info.IsDefined(attributeType, inherit);
if (!isDefined) isDefined = _type.IsDefinedInTable(attributeType, _info, inherit);
return isDefined;
}
}
//
// A MethodInfo that provides our custom attributes.
//
private class MetadataMethodInfo : MethodInfo {
private MethodInfo _info;
private MetadataType _type;
private AttributeMergeCache _cache;
internal MetadataMethodInfo(MethodInfo info, MetadataType type) {
_info = info;
_type = type;
}
//
// MethodInfo overrides
//
public override ICustomAttributeProvider ReturnTypeCustomAttributes { get { return _info.ReturnTypeCustomAttributes; } }
public override MethodAttributes Attributes { get { return _info.Attributes; } }
public override MethodImplAttributes GetMethodImplementationFlags() { return _info.GetMethodImplementationFlags(); }
public override ParameterInfo[] GetParameters() { return _info.GetParameters(); }
public override object Invoke(object obj, BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture) { return _info.Invoke(obj, invokeAttr, binder, parameters, culture); }
public override RuntimeMethodHandle MethodHandle { get { return _info.MethodHandle; } }
public override Type DeclaringType { get { return _info.DeclaringType; } }
public override string Name { get { return _info.Name; } }
public override Type ReflectedType { get { return _info.ReflectedType; } }
public override bool Equals(object obj) { return object.ReferenceEquals(this, obj); }
public override int GetHashCode() { return _info.GetHashCode(); }
public override CallingConventions CallingConvention { get { return _info.CallingConvention; } }
public override bool ContainsGenericParameters { get { return _info.ContainsGenericParameters; } }
public override MethodInfo GetBaseDefinition() { return _info.GetBaseDefinition(); }
public override Type[] GetGenericArguments() { return _info.GetGenericArguments(); }
public override MethodInfo GetGenericMethodDefinition() { return _info.GetGenericMethodDefinition(); }
public override MethodBody GetMethodBody() { return _info.GetMethodBody(); }
public override bool IsGenericMethod { get { return _info.IsGenericMethod; } }
public override bool IsGenericMethodDefinition { get { return _info.IsGenericMethodDefinition; } }
public override MethodInfo MakeGenericMethod(params Type[] typeArguments) { return _info.MakeGenericMethod(typeArguments); }
public override MemberTypes MemberType { get { return _info.MemberType; } }
public override int MetadataToken { get { return _info.MetadataToken; } }
public override Module Module { get { return _info.Module; } }
public override ParameterInfo ReturnParameter { get { return _info.ReturnParameter; } }
public override Type ReturnType { get { return _info.ReturnType; } }
public override string ToString() { return _info.ToString(); ; }
//
// Merges our custom attributes in with those of the member info.
//
public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
return _type.MergeAttributes(attributeType, _info, inherit, ref _cache);
}
//
// Merges our custom attributes in with those of the member info.
//
public override object[] GetCustomAttributes(bool inherit) {
return _type.MergeAttributes(null, _info, inherit, ref _cache);
}
//
// Determines if an attribute exists in the member info
// or in our own code.
//
public override bool IsDefined(Type attributeType, bool inherit) {
bool isDefined = _info.IsDefined(attributeType, inherit);
if (!isDefined) isDefined = _type.IsDefinedInTable(attributeType, _info, inherit);
return isDefined;
}
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
