Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Attribute.cs / 1458001 / Attribute.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
namespace System {
using System;
using System.Reflection;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Globalization;
using System.Diagnostics.Contracts;
using System.Security;
using System.Security.Permissions;
[Serializable]
[AttributeUsageAttribute(AttributeTargets.All, Inherited = true, AllowMultiple=false)]
[ClassInterface(ClassInterfaceType.None)]
[ComDefaultInterface(typeof(_Attribute))]
[System.Runtime.InteropServices.ComVisible(true)]
public abstract class Attribute : _Attribute
{
#region Private Statics
#region PropertyInfo
private static Attribute[] InternalGetCustomAttributes(PropertyInfo element, Type type, bool inherit)
{
Contract.Requires(type != null);
Contract.Requires(type.IsSubclassOf(typeof(Attribute)) || type == typeof(Attribute));
// walk up the hierarchy chain
Attribute[] attributes = (Attribute[])element.GetCustomAttributes(type, inherit);
if (!inherit)
return attributes;
// create the hashtable that keeps track of inherited types
Dictionary types = new Dictionary(11);
// create an array list to collect all the requested attibutes
List attributeList = new List();
CopyToArrayList(attributeList, attributes, types);
PropertyInfo baseProp = GetParentDefinition(element);
while (baseProp != null)
{
attributes = GetCustomAttributes(baseProp, type, false);
AddAttributesToList(attributeList, attributes, types);
baseProp = GetParentDefinition(baseProp);
}
Array array = CreateAttributeArrayHelper(type, attributeList.Count);
Array.Copy(attributeList.ToArray(), 0, array, 0, attributeList.Count);
return (Attribute[])array;
}
private static bool InternalIsDefined(PropertyInfo element, Type attributeType, bool inherit)
{
// walk up the hierarchy chain
if (element.IsDefined(attributeType, inherit))
return true;
if (inherit)
{
AttributeUsageAttribute usage = InternalGetAttributeUsage(attributeType);
if (!usage.Inherited)
return false;
PropertyInfo baseProp = GetParentDefinition(element);
while (baseProp != null)
{
if (baseProp.IsDefined(attributeType, false))
return true;
baseProp = GetParentDefinition(baseProp);
}
}
return false;
}
private static PropertyInfo GetParentDefinition(PropertyInfo property)
{
Contract.Requires(property != null);
// for the current property get the base class of the getter and the setter, they might be different
// note that this only works for RuntimeMethodInfo
MethodInfo propAccessor = property.GetGetMethod(true);
if (propAccessor == null)
propAccessor = property.GetSetMethod(true);
RuntimeMethodInfo rtPropAccessor = propAccessor as RuntimeMethodInfo;
if (rtPropAccessor != null)
{
rtPropAccessor = rtPropAccessor.GetParentDefinition();
if (rtPropAccessor != null)
// There is a public overload of Type.GetProperty that takes both a BingingFlags enum and a return type.
// However, we cannot use that because it doesn't accept null for "types".
return rtPropAccessor.DeclaringType.GetProperty(
property.Name,
BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly,
property.PropertyType);
}
return null;
}
#endregion
#region EventInfo
private static Attribute[] InternalGetCustomAttributes(EventInfo element, Type type, bool inherit)
{
Contract.Requires(element != null);
Contract.Requires(type != null);
Contract.Requires(type.IsSubclassOf(typeof(Attribute)) || type == typeof(Attribute));
// walk up the hierarchy chain
Attribute[] attributes = (Attribute[])element.GetCustomAttributes(type, inherit);
if (inherit)
{
// create the hashtable that keeps track of inherited types
Dictionary types = new Dictionary(11);
// create an array list to collect all the requested attibutes
List attributeList = new List();
CopyToArrayList(attributeList, attributes, types);
EventInfo baseEvent = GetParentDefinition(element);
while (baseEvent != null)
{
attributes = GetCustomAttributes(baseEvent, type, false);
AddAttributesToList(attributeList, attributes, types);
baseEvent = GetParentDefinition(baseEvent);
}
Array array = CreateAttributeArrayHelper(type, attributeList.Count);
Array.Copy(attributeList.ToArray(), 0, array, 0, attributeList.Count);
return (Attribute[])array;
}
else
return attributes;
}
private static EventInfo GetParentDefinition(EventInfo ev)
{
Contract.Requires(ev != null);
// note that this only works for RuntimeMethodInfo
MethodInfo add = ev.GetAddMethod(true);
RuntimeMethodInfo rtAdd = add as RuntimeMethodInfo;
if (rtAdd != null)
{
rtAdd = rtAdd.GetParentDefinition();
if (rtAdd != null)
return rtAdd.DeclaringType.GetEvent(ev.Name);
}
return null;
}
private static bool InternalIsDefined (EventInfo element, Type attributeType, bool inherit)
{
Contract.Requires(element != null);
// walk up the hierarchy chain
if (element.IsDefined(attributeType, inherit))
return true;
if (inherit)
{
AttributeUsageAttribute usage = InternalGetAttributeUsage(attributeType);
if (!usage.Inherited)
return false;
EventInfo baseEvent = GetParentDefinition(element);
while (baseEvent != null)
{
if (baseEvent.IsDefined(attributeType, false))
return true;
baseEvent = GetParentDefinition(baseEvent);
}
}
return false;
}
#endregion
#region ParameterInfo
private static ParameterInfo GetParentDefinition(ParameterInfo param)
{
Contract.Requires(param != null);
// note that this only works for RuntimeMethodInfo
RuntimeMethodInfo rtMethod = param.Member as RuntimeMethodInfo;
if (rtMethod != null)
{
rtMethod = rtMethod.GetParentDefinition();
if (rtMethod != null)
{
// Find the ParameterInfo on this method
ParameterInfo[] parameters = rtMethod.GetParameters();
return parameters[param.Position]; // Point to the correct ParameterInfo of the method
}
}
return null;
}
private static Attribute[] InternalParamGetCustomAttributes(ParameterInfo param, Type type, bool inherit)
{
Contract.Requires(param != null);
// For ParameterInfo's we need to make sure that we chain through all the MethodInfo's in the inheritance chain that
// have this ParameterInfo defined. .We pick up all the CustomAttributes for the starting ParameterInfo. We need to pick up only attributes
// that are marked inherited from the remainder of the MethodInfo's in the inheritance chain.
// For MethodInfo's on an interface we do not do an inheritance walk so the default ParameterInfo attributes are returned.
// For MethodInfo's on a class we walk up the inheritance chain but do not look at the MethodInfo's on the interfaces that the
// class inherits from and return the respective ParameterInfo attributes
List disAllowMultiple = new List();
Object [] objAttr;
if (type == null)
type = typeof(Attribute);
objAttr = param.GetCustomAttributes(type, false);
for (int i =0;i < objAttr.Length;i++)
{
Type objType = objAttr[i].GetType();
AttributeUsageAttribute attribUsage = InternalGetAttributeUsage(objType);
if (attribUsage.AllowMultiple == false)
disAllowMultiple.Add(objType);
}
// Get all the attributes that have Attribute as the base class
Attribute [] ret = null;
if (objAttr.Length == 0)
ret = CreateAttributeArrayHelper(type,0);
else
ret = (Attribute[])objAttr;
if (param.Member.DeclaringType == null) // This is an interface so we are done.
return ret;
if (!inherit)
return ret;
ParameterInfo baseParam = GetParentDefinition(param);
while (baseParam != null)
{
objAttr = baseParam.GetCustomAttributes(type, false);
int count = 0;
for (int i =0;i < objAttr.Length;i++)
{
Type objType = objAttr[i].GetType();
AttributeUsageAttribute attribUsage = InternalGetAttributeUsage(objType);
if ((attribUsage.Inherited) && (disAllowMultiple.Contains(objType) == false))
{
if (attribUsage.AllowMultiple == false)
disAllowMultiple.Add(objType);
count++;
}
else
objAttr[i] = null;
}
// Get all the attributes that have Attribute as the base class
Attribute [] attributes = CreateAttributeArrayHelper(type,count);
count = 0;
for (int i =0;i < objAttr.Length;i++)
{
if (objAttr[i] != null)
{
attributes[count] = (Attribute)objAttr[i];
count++;
}
}
Attribute [] temp = ret;
ret = CreateAttributeArrayHelper(type,temp.Length + count);
Array.Copy(temp,ret,temp.Length);
int offset = temp.Length;
for (int i =0;i < attributes.Length;i++)
ret[offset + i] = attributes[i];
baseParam = GetParentDefinition(baseParam);
}
return ret;
}
private static bool InternalParamIsDefined(ParameterInfo param, Type type, bool inherit)
{
Contract.Requires(param != null);
Contract.Requires(type != null);
// For ParameterInfo's we need to make sure that we chain through all the MethodInfo's in the inheritance chain.
// We pick up all the CustomAttributes for the starting ParameterInfo. We need to pick up only attributes
// that are marked inherited from the remainder of the ParameterInfo's in the inheritance chain.
// For MethodInfo's on an interface we do not do an inheritance walk. For ParameterInfo's on a
// Class we walk up the inheritance chain but do not look at the MethodInfo's on the interfaces that the class inherits from.
if (param.IsDefined(type, false))
return true;
if (param.Member.DeclaringType == null || !inherit) // This is an interface so we are done.
return false;
ParameterInfo baseParam = GetParentDefinition(param);
while (baseParam != null)
{
Object[] objAttr = baseParam.GetCustomAttributes(type, false);
for (int i =0; i < objAttr.Length; i++)
{
Type objType = objAttr[i].GetType();
AttributeUsageAttribute attribUsage = InternalGetAttributeUsage(objType);
if ((objAttr[i] is Attribute) && (attribUsage.Inherited))
return true;
}
baseParam = GetParentDefinition(baseParam);
}
return false;
}
#endregion
#region Utility
private static void CopyToArrayList(List attributeList,Attribute[] attributes,Dictionary types)
{
for (int i = 0; i < attributes.Length; i++)
{
attributeList.Add(attributes[i]);
Type attrType = attributes[i].GetType();
if (!types.ContainsKey(attrType))
types[attrType] = InternalGetAttributeUsage(attrType);
}
}
private static void AddAttributesToList(List attributeList, Attribute[] attributes, Dictionary types)
{
for (int i = 0; i < attributes.Length; i++)
{
Type attrType = attributes[i].GetType();
AttributeUsageAttribute usage = null;
types.TryGetValue(attrType, out usage);
if (usage == null)
{
// the type has never been seen before if it's inheritable add it to the list
usage = InternalGetAttributeUsage(attrType);
types[attrType] = usage;
if (usage.Inherited)
attributeList.Add(attributes[i]);
}
else if (usage.Inherited && usage.AllowMultiple)
{
// we saw this type already add it only if it is inheritable and it does allow multiple
attributeList.Add(attributes[i]);
}
}
}
private static AttributeUsageAttribute InternalGetAttributeUsage(Type type)
{
// Check if the custom attributes is Inheritable
Object [] obj = type.GetCustomAttributes(typeof(AttributeUsageAttribute), false);
if (obj.Length == 1)
return (AttributeUsageAttribute)obj[0];
if (obj.Length == 0)
return AttributeUsageAttribute.Default;
throw new FormatException(
Environment.GetResourceString("Format_AttributeUsage", type));
}
[System.Security.SecuritySafeCritical]
private static Attribute[] CreateAttributeArrayHelper(Type elementType, int elementCount)
{
return (Attribute[])Array.UnsafeCreateInstance(elementType, elementCount);
}
#endregion
#endregion
#region Public Statics
#region MemberInfo
public static Attribute[] GetCustomAttributes(MemberInfo element, Type type)
{
return GetCustomAttributes(element, type, true);
}
public static Attribute[] GetCustomAttributes(MemberInfo element, Type type, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
if (type == null)
throw new ArgumentNullException("type");
if (!type.IsSubclassOf(typeof(Attribute)) && type != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
switch (element.MemberType)
{
case MemberTypes.Property:
return InternalGetCustomAttributes((PropertyInfo)element, type, inherit);
case MemberTypes.Event:
return InternalGetCustomAttributes((EventInfo)element, type, inherit);
default:
return element.GetCustomAttributes(type, inherit) as Attribute[];
}
}
public static Attribute[] GetCustomAttributes(MemberInfo element)
{
return GetCustomAttributes(element, true);
}
public static Attribute[] GetCustomAttributes(MemberInfo element, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
Contract.EndContractBlock();
switch (element.MemberType)
{
case MemberTypes.Property:
return InternalGetCustomAttributes((PropertyInfo)element, typeof(Attribute), inherit);
case MemberTypes.Event:
return InternalGetCustomAttributes((EventInfo)element, typeof(Attribute), inherit);
default:
return element.GetCustomAttributes(typeof(Attribute), inherit) as Attribute[];
}
}
public static bool IsDefined(MemberInfo element, Type attributeType)
{
return IsDefined(element, attributeType, true);
}
public static bool IsDefined(MemberInfo element, Type attributeType, bool inherit)
{
// Returns true if a custom attribute subclass of attributeType class/interface with inheritance walk
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
switch(element.MemberType)
{
case MemberTypes.Property:
return InternalIsDefined((PropertyInfo)element, attributeType, inherit);
case MemberTypes.Event:
return InternalIsDefined((EventInfo)element, attributeType, inherit);
default:
return element.IsDefined(attributeType, inherit);
}
}
public static Attribute GetCustomAttribute(MemberInfo element, Type attributeType)
{
return GetCustomAttribute(element, attributeType, true);
}
public static Attribute GetCustomAttribute(MemberInfo element, Type attributeType, bool inherit)
{
Attribute[] attrib = GetCustomAttributes(element, attributeType, inherit);
if (attrib == null || attrib.Length == 0)
return null;
if (attrib.Length == 1)
return attrib[0];
throw new AmbiguousMatchException(Environment.GetResourceString("RFLCT.AmbigCust"));
}
#endregion
#region ParameterInfo
public static Attribute[] GetCustomAttributes(ParameterInfo element)
{
return GetCustomAttributes(element, true);
}
public static Attribute[] GetCustomAttributes(ParameterInfo element, Type attributeType)
{
return (Attribute[])GetCustomAttributes(element, attributeType, true);
}
[System.Security.SecuritySafeCritical] // auto-generated
public static Attribute[] GetCustomAttributes(ParameterInfo element, Type attributeType, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
if (element.Member == null)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidParameterInfo"), "element");
Contract.EndContractBlock();
MemberInfo member = element.Member;
if (member.MemberType == MemberTypes.Method && inherit)
return InternalParamGetCustomAttributes(element, attributeType, inherit) as Attribute[];
return element.GetCustomAttributes(attributeType, inherit) as Attribute[];
}
[System.Security.SecuritySafeCritical] // auto-generated
public static Attribute[] GetCustomAttributes(ParameterInfo element, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
if (element.Member == null)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidParameterInfo"), "element");
Contract.EndContractBlock();
MemberInfo member = element.Member;
if (member.MemberType == MemberTypes.Method && inherit)
return InternalParamGetCustomAttributes(element, null, inherit) as Attribute[];
return element.GetCustomAttributes(typeof(Attribute), inherit) as Attribute[];
}
public static bool IsDefined(ParameterInfo element, Type attributeType)
{
return IsDefined(element, attributeType, true);
}
public static bool IsDefined(ParameterInfo element, Type attributeType, bool inherit)
{
// Returns true is a custom attribute subclass of attributeType class/interface with inheritance walk
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
MemberInfo member = element.Member;
switch(member.MemberType)
{
case MemberTypes.Method: // We need to climb up the member hierarchy
return InternalParamIsDefined(element, attributeType, inherit);
case MemberTypes.Constructor:
return element.IsDefined(attributeType, false);
case MemberTypes.Property:
return element.IsDefined(attributeType, false);
default:
Contract.Assert(false, "Invalid type for ParameterInfo member in Attribute class");
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidParamInfo"));
}
}
public static Attribute GetCustomAttribute(ParameterInfo element, Type attributeType)
{
return GetCustomAttribute(element, attributeType, true);
}
public static Attribute GetCustomAttribute(ParameterInfo element, Type attributeType, bool inherit)
{
// Returns an Attribute of base class/inteface attributeType on the ParameterInfo or null if none exists.
// throws an AmbiguousMatchException if there are more than one defined.
Attribute[] attrib = GetCustomAttributes(element, attributeType, inherit);
if (attrib == null || attrib.Length == 0)
return null;
if (attrib.Length == 0)
return null;
if (attrib.Length == 1)
return attrib[0];
throw new AmbiguousMatchException(Environment.GetResourceString("RFLCT.AmbigCust"));
}
#endregion
#region Module
public static Attribute[] GetCustomAttributes(Module element, Type attributeType)
{
return GetCustomAttributes (element, attributeType, true);
}
public static Attribute[] GetCustomAttributes(Module element)
{
return GetCustomAttributes(element, true);
}
public static Attribute[] GetCustomAttributes(Module element, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
Contract.EndContractBlock();
return (Attribute[])element.GetCustomAttributes(typeof(Attribute), inherit);
}
public static Attribute[] GetCustomAttributes(Module element, Type attributeType, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
return (Attribute[])element.GetCustomAttributes(attributeType, inherit);
}
public static bool IsDefined(Module element, Type attributeType)
{
return IsDefined(element, attributeType, false);
}
[System.Security.SecuritySafeCritical] // auto-generated
public static bool IsDefined(Module element, Type attributeType, bool inherit)
{
// Returns true is a custom attribute subclass of attributeType class/interface with no inheritance walk
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
return element.IsDefined(attributeType,false);
}
public static Attribute GetCustomAttribute(Module element, Type attributeType)
{
return GetCustomAttribute(element, attributeType, true);
}
public static Attribute GetCustomAttribute(Module element, Type attributeType, bool inherit)
{
// Returns an Attribute of base class/inteface attributeType on the Module or null if none exists.
// throws an AmbiguousMatchException if there are more than one defined.
Attribute[] attrib = GetCustomAttributes(element,attributeType,inherit);
if (attrib == null || attrib.Length == 0)
return null;
if (attrib.Length == 1)
return attrib[0];
throw new AmbiguousMatchException(Environment.GetResourceString("RFLCT.AmbigCust"));
}
#endregion
#region Assembly
public static Attribute[] GetCustomAttributes(Assembly element, Type attributeType)
{
return GetCustomAttributes(element, attributeType, true);
}
public static Attribute[] GetCustomAttributes(Assembly element, Type attributeType, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
return (Attribute[])element.GetCustomAttributes(attributeType, inherit);
}
public static Attribute[] GetCustomAttributes(Assembly element)
{
return GetCustomAttributes(element, true);
}
public static Attribute[] GetCustomAttributes(Assembly element, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
Contract.EndContractBlock();
return (Attribute[])element.GetCustomAttributes(typeof(Attribute), inherit);
}
public static bool IsDefined (Assembly element, Type attributeType)
{
return IsDefined (element, attributeType, true);
}
public static bool IsDefined (Assembly element, Type attributeType, bool inherit)
{
// Returns true is a custom attribute subclass of attributeType class/interface with no inheritance walk
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
return element.IsDefined(attributeType, false);
}
public static Attribute GetCustomAttribute(Assembly element, Type attributeType)
{
return GetCustomAttribute (element, attributeType, true);
}
public static Attribute GetCustomAttribute(Assembly element, Type attributeType, bool inherit)
{
// Returns an Attribute of base class/inteface attributeType on the Assembly or null if none exists.
// throws an AmbiguousMatchException if there are more than one defined.
Attribute[] attrib = GetCustomAttributes(element,attributeType,inherit);
if (attrib == null || attrib.Length == 0)
return null;
if (attrib.Length == 1)
return attrib[0];
throw new AmbiguousMatchException(Environment.GetResourceString("RFLCT.AmbigCust"));
}
#endregion
#endregion
#region Constructor
protected Attribute() { }
#endregion
#region Object Overrides
[System.Security.SecuritySafeCritical] // auto-generated
public override bool Equals(Object obj)
{
if (obj == null)
return false;
RuntimeType thisType = (RuntimeType)this.GetType();
RuntimeType thatType = (RuntimeType)obj.GetType();
if (thatType != thisType)
return false;
Object thisObj = this;
Object thisResult, thatResult;
FieldInfo[] thisFields = thisType.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
for (int i = 0; i < thisFields.Length; i++)
{
// Visibility check and consistency check are not necessary.
thisResult = ((RtFieldInfo)thisFields[i]).InternalGetValue(thisObj, false, false);
thatResult = ((RtFieldInfo)thisFields[i]).InternalGetValue(obj, false, false);
if (!AreFieldValuesEqual(thisResult, thatResult))
{
return false;
}
}
return true;
}
// Compares values of custom-attribute fields.
private static bool AreFieldValuesEqual(Object thisValue, Object thatValue)
{
if (thisValue == null && thatValue == null)
return true;
if (thisValue == null || thatValue == null)
return false;
if (thisValue.GetType().IsArray)
{
// Ensure both are arrays of the same type.
if (!thisValue.GetType().Equals(thatValue.GetType()))
{
return false;
}
Array thisValueArray = thisValue as Array;
Array thatValueArray = thatValue as Array;
if (thisValueArray.Length != thatValueArray.Length)
{
return false;
}
// Attributes can only contain single-dimension arrays, so we don't need to worry about
// multidimensional arrays.
Contract.Assert(thisValueArray.Rank == 1 && thatValueArray.Rank == 1);
for (int j = 0; j < thisValueArray.Length; j++)
{
if (!AreFieldValuesEqual(thisValueArray.GetValue(j), thatValueArray.GetValue(j)))
{
return false;
}
}
}
else
{
// An object of type Attribute will cause a stack overflow.
// However, this should never happen because custom attributes cannot contain values other than
// constants, single-dimensional arrays and typeof expressions.
Contract.Assert(!(thisValue is Attribute));
if (!thisValue.Equals(thatValue))
return false;
}
return true;
}
[System.Security.SecuritySafeCritical] // auto-generated
public override int GetHashCode()
{
Type type = GetType();
FieldInfo[] fields = type.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
Object vThis = null;
for (int i = 0; i < fields.Length; i++)
{
// Visibility check and consistency check are not necessary.
Object fieldValue = ((RtFieldInfo)fields[i]).InternalGetValue(this, false, false);
// The hashcode of an array ignores the contents of the array, so it can produce
// different hashcodes for arrays with the same contents.
// Since we do deep comparisons of arrays in Equals(), this means Equals and GetHashCode will
// be inconsistent for arrays. Therefore, we ignore hashes of arrays.
if (fieldValue != null && !fieldValue.GetType().IsArray)
vThis = fieldValue;
if (vThis != null)
break;
}
if (vThis != null)
return vThis.GetHashCode();
return type.GetHashCode();
}
#endregion
#region Public Virtual Members
public virtual Object TypeId { get { return GetType(); } }
public virtual bool Match(Object obj) { return Equals(obj); }
#endregion
#region Public Members
public virtual bool IsDefaultAttribute() { return false; }
#endregion
void _Attribute.GetTypeInfoCount(out uint pcTInfo)
{
throw new NotImplementedException();
}
void _Attribute.GetTypeInfo(uint iTInfo, uint lcid, IntPtr ppTInfo)
{
throw new NotImplementedException();
}
void _Attribute.GetIDsOfNames([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
{
throw new NotImplementedException();
}
void _Attribute.Invoke(uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
{
throw new NotImplementedException();
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
namespace System {
using System;
using System.Reflection;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Globalization;
using System.Diagnostics.Contracts;
using System.Security;
using System.Security.Permissions;
[Serializable]
[AttributeUsageAttribute(AttributeTargets.All, Inherited = true, AllowMultiple=false)]
[ClassInterface(ClassInterfaceType.None)]
[ComDefaultInterface(typeof(_Attribute))]
[System.Runtime.InteropServices.ComVisible(true)]
public abstract class Attribute : _Attribute
{
#region Private Statics
#region PropertyInfo
private static Attribute[] InternalGetCustomAttributes(PropertyInfo element, Type type, bool inherit)
{
Contract.Requires(type != null);
Contract.Requires(type.IsSubclassOf(typeof(Attribute)) || type == typeof(Attribute));
// walk up the hierarchy chain
Attribute[] attributes = (Attribute[])element.GetCustomAttributes(type, inherit);
if (!inherit)
return attributes;
// create the hashtable that keeps track of inherited types
Dictionary types = new Dictionary(11);
// create an array list to collect all the requested attibutes
List attributeList = new List();
CopyToArrayList(attributeList, attributes, types);
PropertyInfo baseProp = GetParentDefinition(element);
while (baseProp != null)
{
attributes = GetCustomAttributes(baseProp, type, false);
AddAttributesToList(attributeList, attributes, types);
baseProp = GetParentDefinition(baseProp);
}
Array array = CreateAttributeArrayHelper(type, attributeList.Count);
Array.Copy(attributeList.ToArray(), 0, array, 0, attributeList.Count);
return (Attribute[])array;
}
private static bool InternalIsDefined(PropertyInfo element, Type attributeType, bool inherit)
{
// walk up the hierarchy chain
if (element.IsDefined(attributeType, inherit))
return true;
if (inherit)
{
AttributeUsageAttribute usage = InternalGetAttributeUsage(attributeType);
if (!usage.Inherited)
return false;
PropertyInfo baseProp = GetParentDefinition(element);
while (baseProp != null)
{
if (baseProp.IsDefined(attributeType, false))
return true;
baseProp = GetParentDefinition(baseProp);
}
}
return false;
}
private static PropertyInfo GetParentDefinition(PropertyInfo property)
{
Contract.Requires(property != null);
// for the current property get the base class of the getter and the setter, they might be different
// note that this only works for RuntimeMethodInfo
MethodInfo propAccessor = property.GetGetMethod(true);
if (propAccessor == null)
propAccessor = property.GetSetMethod(true);
RuntimeMethodInfo rtPropAccessor = propAccessor as RuntimeMethodInfo;
if (rtPropAccessor != null)
{
rtPropAccessor = rtPropAccessor.GetParentDefinition();
if (rtPropAccessor != null)
// There is a public overload of Type.GetProperty that takes both a BingingFlags enum and a return type.
// However, we cannot use that because it doesn't accept null for "types".
return rtPropAccessor.DeclaringType.GetProperty(
property.Name,
BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly,
property.PropertyType);
}
return null;
}
#endregion
#region EventInfo
private static Attribute[] InternalGetCustomAttributes(EventInfo element, Type type, bool inherit)
{
Contract.Requires(element != null);
Contract.Requires(type != null);
Contract.Requires(type.IsSubclassOf(typeof(Attribute)) || type == typeof(Attribute));
// walk up the hierarchy chain
Attribute[] attributes = (Attribute[])element.GetCustomAttributes(type, inherit);
if (inherit)
{
// create the hashtable that keeps track of inherited types
Dictionary types = new Dictionary(11);
// create an array list to collect all the requested attibutes
List attributeList = new List();
CopyToArrayList(attributeList, attributes, types);
EventInfo baseEvent = GetParentDefinition(element);
while (baseEvent != null)
{
attributes = GetCustomAttributes(baseEvent, type, false);
AddAttributesToList(attributeList, attributes, types);
baseEvent = GetParentDefinition(baseEvent);
}
Array array = CreateAttributeArrayHelper(type, attributeList.Count);
Array.Copy(attributeList.ToArray(), 0, array, 0, attributeList.Count);
return (Attribute[])array;
}
else
return attributes;
}
private static EventInfo GetParentDefinition(EventInfo ev)
{
Contract.Requires(ev != null);
// note that this only works for RuntimeMethodInfo
MethodInfo add = ev.GetAddMethod(true);
RuntimeMethodInfo rtAdd = add as RuntimeMethodInfo;
if (rtAdd != null)
{
rtAdd = rtAdd.GetParentDefinition();
if (rtAdd != null)
return rtAdd.DeclaringType.GetEvent(ev.Name);
}
return null;
}
private static bool InternalIsDefined (EventInfo element, Type attributeType, bool inherit)
{
Contract.Requires(element != null);
// walk up the hierarchy chain
if (element.IsDefined(attributeType, inherit))
return true;
if (inherit)
{
AttributeUsageAttribute usage = InternalGetAttributeUsage(attributeType);
if (!usage.Inherited)
return false;
EventInfo baseEvent = GetParentDefinition(element);
while (baseEvent != null)
{
if (baseEvent.IsDefined(attributeType, false))
return true;
baseEvent = GetParentDefinition(baseEvent);
}
}
return false;
}
#endregion
#region ParameterInfo
private static ParameterInfo GetParentDefinition(ParameterInfo param)
{
Contract.Requires(param != null);
// note that this only works for RuntimeMethodInfo
RuntimeMethodInfo rtMethod = param.Member as RuntimeMethodInfo;
if (rtMethod != null)
{
rtMethod = rtMethod.GetParentDefinition();
if (rtMethod != null)
{
// Find the ParameterInfo on this method
ParameterInfo[] parameters = rtMethod.GetParameters();
return parameters[param.Position]; // Point to the correct ParameterInfo of the method
}
}
return null;
}
private static Attribute[] InternalParamGetCustomAttributes(ParameterInfo param, Type type, bool inherit)
{
Contract.Requires(param != null);
// For ParameterInfo's we need to make sure that we chain through all the MethodInfo's in the inheritance chain that
// have this ParameterInfo defined. .We pick up all the CustomAttributes for the starting ParameterInfo. We need to pick up only attributes
// that are marked inherited from the remainder of the MethodInfo's in the inheritance chain.
// For MethodInfo's on an interface we do not do an inheritance walk so the default ParameterInfo attributes are returned.
// For MethodInfo's on a class we walk up the inheritance chain but do not look at the MethodInfo's on the interfaces that the
// class inherits from and return the respective ParameterInfo attributes
List disAllowMultiple = new List();
Object [] objAttr;
if (type == null)
type = typeof(Attribute);
objAttr = param.GetCustomAttributes(type, false);
for (int i =0;i < objAttr.Length;i++)
{
Type objType = objAttr[i].GetType();
AttributeUsageAttribute attribUsage = InternalGetAttributeUsage(objType);
if (attribUsage.AllowMultiple == false)
disAllowMultiple.Add(objType);
}
// Get all the attributes that have Attribute as the base class
Attribute [] ret = null;
if (objAttr.Length == 0)
ret = CreateAttributeArrayHelper(type,0);
else
ret = (Attribute[])objAttr;
if (param.Member.DeclaringType == null) // This is an interface so we are done.
return ret;
if (!inherit)
return ret;
ParameterInfo baseParam = GetParentDefinition(param);
while (baseParam != null)
{
objAttr = baseParam.GetCustomAttributes(type, false);
int count = 0;
for (int i =0;i < objAttr.Length;i++)
{
Type objType = objAttr[i].GetType();
AttributeUsageAttribute attribUsage = InternalGetAttributeUsage(objType);
if ((attribUsage.Inherited) && (disAllowMultiple.Contains(objType) == false))
{
if (attribUsage.AllowMultiple == false)
disAllowMultiple.Add(objType);
count++;
}
else
objAttr[i] = null;
}
// Get all the attributes that have Attribute as the base class
Attribute [] attributes = CreateAttributeArrayHelper(type,count);
count = 0;
for (int i =0;i < objAttr.Length;i++)
{
if (objAttr[i] != null)
{
attributes[count] = (Attribute)objAttr[i];
count++;
}
}
Attribute [] temp = ret;
ret = CreateAttributeArrayHelper(type,temp.Length + count);
Array.Copy(temp,ret,temp.Length);
int offset = temp.Length;
for (int i =0;i < attributes.Length;i++)
ret[offset + i] = attributes[i];
baseParam = GetParentDefinition(baseParam);
}
return ret;
}
private static bool InternalParamIsDefined(ParameterInfo param, Type type, bool inherit)
{
Contract.Requires(param != null);
Contract.Requires(type != null);
// For ParameterInfo's we need to make sure that we chain through all the MethodInfo's in the inheritance chain.
// We pick up all the CustomAttributes for the starting ParameterInfo. We need to pick up only attributes
// that are marked inherited from the remainder of the ParameterInfo's in the inheritance chain.
// For MethodInfo's on an interface we do not do an inheritance walk. For ParameterInfo's on a
// Class we walk up the inheritance chain but do not look at the MethodInfo's on the interfaces that the class inherits from.
if (param.IsDefined(type, false))
return true;
if (param.Member.DeclaringType == null || !inherit) // This is an interface so we are done.
return false;
ParameterInfo baseParam = GetParentDefinition(param);
while (baseParam != null)
{
Object[] objAttr = baseParam.GetCustomAttributes(type, false);
for (int i =0; i < objAttr.Length; i++)
{
Type objType = objAttr[i].GetType();
AttributeUsageAttribute attribUsage = InternalGetAttributeUsage(objType);
if ((objAttr[i] is Attribute) && (attribUsage.Inherited))
return true;
}
baseParam = GetParentDefinition(baseParam);
}
return false;
}
#endregion
#region Utility
private static void CopyToArrayList(List attributeList,Attribute[] attributes,Dictionary types)
{
for (int i = 0; i < attributes.Length; i++)
{
attributeList.Add(attributes[i]);
Type attrType = attributes[i].GetType();
if (!types.ContainsKey(attrType))
types[attrType] = InternalGetAttributeUsage(attrType);
}
}
private static void AddAttributesToList(List attributeList, Attribute[] attributes, Dictionary types)
{
for (int i = 0; i < attributes.Length; i++)
{
Type attrType = attributes[i].GetType();
AttributeUsageAttribute usage = null;
types.TryGetValue(attrType, out usage);
if (usage == null)
{
// the type has never been seen before if it's inheritable add it to the list
usage = InternalGetAttributeUsage(attrType);
types[attrType] = usage;
if (usage.Inherited)
attributeList.Add(attributes[i]);
}
else if (usage.Inherited && usage.AllowMultiple)
{
// we saw this type already add it only if it is inheritable and it does allow multiple
attributeList.Add(attributes[i]);
}
}
}
private static AttributeUsageAttribute InternalGetAttributeUsage(Type type)
{
// Check if the custom attributes is Inheritable
Object [] obj = type.GetCustomAttributes(typeof(AttributeUsageAttribute), false);
if (obj.Length == 1)
return (AttributeUsageAttribute)obj[0];
if (obj.Length == 0)
return AttributeUsageAttribute.Default;
throw new FormatException(
Environment.GetResourceString("Format_AttributeUsage", type));
}
[System.Security.SecuritySafeCritical]
private static Attribute[] CreateAttributeArrayHelper(Type elementType, int elementCount)
{
return (Attribute[])Array.UnsafeCreateInstance(elementType, elementCount);
}
#endregion
#endregion
#region Public Statics
#region MemberInfo
public static Attribute[] GetCustomAttributes(MemberInfo element, Type type)
{
return GetCustomAttributes(element, type, true);
}
public static Attribute[] GetCustomAttributes(MemberInfo element, Type type, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
if (type == null)
throw new ArgumentNullException("type");
if (!type.IsSubclassOf(typeof(Attribute)) && type != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
switch (element.MemberType)
{
case MemberTypes.Property:
return InternalGetCustomAttributes((PropertyInfo)element, type, inherit);
case MemberTypes.Event:
return InternalGetCustomAttributes((EventInfo)element, type, inherit);
default:
return element.GetCustomAttributes(type, inherit) as Attribute[];
}
}
public static Attribute[] GetCustomAttributes(MemberInfo element)
{
return GetCustomAttributes(element, true);
}
public static Attribute[] GetCustomAttributes(MemberInfo element, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
Contract.EndContractBlock();
switch (element.MemberType)
{
case MemberTypes.Property:
return InternalGetCustomAttributes((PropertyInfo)element, typeof(Attribute), inherit);
case MemberTypes.Event:
return InternalGetCustomAttributes((EventInfo)element, typeof(Attribute), inherit);
default:
return element.GetCustomAttributes(typeof(Attribute), inherit) as Attribute[];
}
}
public static bool IsDefined(MemberInfo element, Type attributeType)
{
return IsDefined(element, attributeType, true);
}
public static bool IsDefined(MemberInfo element, Type attributeType, bool inherit)
{
// Returns true if a custom attribute subclass of attributeType class/interface with inheritance walk
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
switch(element.MemberType)
{
case MemberTypes.Property:
return InternalIsDefined((PropertyInfo)element, attributeType, inherit);
case MemberTypes.Event:
return InternalIsDefined((EventInfo)element, attributeType, inherit);
default:
return element.IsDefined(attributeType, inherit);
}
}
public static Attribute GetCustomAttribute(MemberInfo element, Type attributeType)
{
return GetCustomAttribute(element, attributeType, true);
}
public static Attribute GetCustomAttribute(MemberInfo element, Type attributeType, bool inherit)
{
Attribute[] attrib = GetCustomAttributes(element, attributeType, inherit);
if (attrib == null || attrib.Length == 0)
return null;
if (attrib.Length == 1)
return attrib[0];
throw new AmbiguousMatchException(Environment.GetResourceString("RFLCT.AmbigCust"));
}
#endregion
#region ParameterInfo
public static Attribute[] GetCustomAttributes(ParameterInfo element)
{
return GetCustomAttributes(element, true);
}
public static Attribute[] GetCustomAttributes(ParameterInfo element, Type attributeType)
{
return (Attribute[])GetCustomAttributes(element, attributeType, true);
}
[System.Security.SecuritySafeCritical] // auto-generated
public static Attribute[] GetCustomAttributes(ParameterInfo element, Type attributeType, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
if (element.Member == null)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidParameterInfo"), "element");
Contract.EndContractBlock();
MemberInfo member = element.Member;
if (member.MemberType == MemberTypes.Method && inherit)
return InternalParamGetCustomAttributes(element, attributeType, inherit) as Attribute[];
return element.GetCustomAttributes(attributeType, inherit) as Attribute[];
}
[System.Security.SecuritySafeCritical] // auto-generated
public static Attribute[] GetCustomAttributes(ParameterInfo element, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
if (element.Member == null)
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidParameterInfo"), "element");
Contract.EndContractBlock();
MemberInfo member = element.Member;
if (member.MemberType == MemberTypes.Method && inherit)
return InternalParamGetCustomAttributes(element, null, inherit) as Attribute[];
return element.GetCustomAttributes(typeof(Attribute), inherit) as Attribute[];
}
public static bool IsDefined(ParameterInfo element, Type attributeType)
{
return IsDefined(element, attributeType, true);
}
public static bool IsDefined(ParameterInfo element, Type attributeType, bool inherit)
{
// Returns true is a custom attribute subclass of attributeType class/interface with inheritance walk
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
MemberInfo member = element.Member;
switch(member.MemberType)
{
case MemberTypes.Method: // We need to climb up the member hierarchy
return InternalParamIsDefined(element, attributeType, inherit);
case MemberTypes.Constructor:
return element.IsDefined(attributeType, false);
case MemberTypes.Property:
return element.IsDefined(attributeType, false);
default:
Contract.Assert(false, "Invalid type for ParameterInfo member in Attribute class");
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidParamInfo"));
}
}
public static Attribute GetCustomAttribute(ParameterInfo element, Type attributeType)
{
return GetCustomAttribute(element, attributeType, true);
}
public static Attribute GetCustomAttribute(ParameterInfo element, Type attributeType, bool inherit)
{
// Returns an Attribute of base class/inteface attributeType on the ParameterInfo or null if none exists.
// throws an AmbiguousMatchException if there are more than one defined.
Attribute[] attrib = GetCustomAttributes(element, attributeType, inherit);
if (attrib == null || attrib.Length == 0)
return null;
if (attrib.Length == 0)
return null;
if (attrib.Length == 1)
return attrib[0];
throw new AmbiguousMatchException(Environment.GetResourceString("RFLCT.AmbigCust"));
}
#endregion
#region Module
public static Attribute[] GetCustomAttributes(Module element, Type attributeType)
{
return GetCustomAttributes (element, attributeType, true);
}
public static Attribute[] GetCustomAttributes(Module element)
{
return GetCustomAttributes(element, true);
}
public static Attribute[] GetCustomAttributes(Module element, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
Contract.EndContractBlock();
return (Attribute[])element.GetCustomAttributes(typeof(Attribute), inherit);
}
public static Attribute[] GetCustomAttributes(Module element, Type attributeType, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
return (Attribute[])element.GetCustomAttributes(attributeType, inherit);
}
public static bool IsDefined(Module element, Type attributeType)
{
return IsDefined(element, attributeType, false);
}
[System.Security.SecuritySafeCritical] // auto-generated
public static bool IsDefined(Module element, Type attributeType, bool inherit)
{
// Returns true is a custom attribute subclass of attributeType class/interface with no inheritance walk
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
return element.IsDefined(attributeType,false);
}
public static Attribute GetCustomAttribute(Module element, Type attributeType)
{
return GetCustomAttribute(element, attributeType, true);
}
public static Attribute GetCustomAttribute(Module element, Type attributeType, bool inherit)
{
// Returns an Attribute of base class/inteface attributeType on the Module or null if none exists.
// throws an AmbiguousMatchException if there are more than one defined.
Attribute[] attrib = GetCustomAttributes(element,attributeType,inherit);
if (attrib == null || attrib.Length == 0)
return null;
if (attrib.Length == 1)
return attrib[0];
throw new AmbiguousMatchException(Environment.GetResourceString("RFLCT.AmbigCust"));
}
#endregion
#region Assembly
public static Attribute[] GetCustomAttributes(Assembly element, Type attributeType)
{
return GetCustomAttributes(element, attributeType, true);
}
public static Attribute[] GetCustomAttributes(Assembly element, Type attributeType, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
return (Attribute[])element.GetCustomAttributes(attributeType, inherit);
}
public static Attribute[] GetCustomAttributes(Assembly element)
{
return GetCustomAttributes(element, true);
}
public static Attribute[] GetCustomAttributes(Assembly element, bool inherit)
{
if (element == null)
throw new ArgumentNullException("element");
Contract.EndContractBlock();
return (Attribute[])element.GetCustomAttributes(typeof(Attribute), inherit);
}
public static bool IsDefined (Assembly element, Type attributeType)
{
return IsDefined (element, attributeType, true);
}
public static bool IsDefined (Assembly element, Type attributeType, bool inherit)
{
// Returns true is a custom attribute subclass of attributeType class/interface with no inheritance walk
if (element == null)
throw new ArgumentNullException("element");
if (attributeType == null)
throw new ArgumentNullException("attributeType");
if (!attributeType.IsSubclassOf(typeof(Attribute)) && attributeType != typeof(Attribute))
throw new ArgumentException(Environment.GetResourceString("Argument_MustHaveAttributeBaseClass"));
Contract.EndContractBlock();
return element.IsDefined(attributeType, false);
}
public static Attribute GetCustomAttribute(Assembly element, Type attributeType)
{
return GetCustomAttribute (element, attributeType, true);
}
public static Attribute GetCustomAttribute(Assembly element, Type attributeType, bool inherit)
{
// Returns an Attribute of base class/inteface attributeType on the Assembly or null if none exists.
// throws an AmbiguousMatchException if there are more than one defined.
Attribute[] attrib = GetCustomAttributes(element,attributeType,inherit);
if (attrib == null || attrib.Length == 0)
return null;
if (attrib.Length == 1)
return attrib[0];
throw new AmbiguousMatchException(Environment.GetResourceString("RFLCT.AmbigCust"));
}
#endregion
#endregion
#region Constructor
protected Attribute() { }
#endregion
#region Object Overrides
[System.Security.SecuritySafeCritical] // auto-generated
public override bool Equals(Object obj)
{
if (obj == null)
return false;
RuntimeType thisType = (RuntimeType)this.GetType();
RuntimeType thatType = (RuntimeType)obj.GetType();
if (thatType != thisType)
return false;
Object thisObj = this;
Object thisResult, thatResult;
FieldInfo[] thisFields = thisType.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
for (int i = 0; i < thisFields.Length; i++)
{
// Visibility check and consistency check are not necessary.
thisResult = ((RtFieldInfo)thisFields[i]).InternalGetValue(thisObj, false, false);
thatResult = ((RtFieldInfo)thisFields[i]).InternalGetValue(obj, false, false);
if (!AreFieldValuesEqual(thisResult, thatResult))
{
return false;
}
}
return true;
}
// Compares values of custom-attribute fields.
private static bool AreFieldValuesEqual(Object thisValue, Object thatValue)
{
if (thisValue == null && thatValue == null)
return true;
if (thisValue == null || thatValue == null)
return false;
if (thisValue.GetType().IsArray)
{
// Ensure both are arrays of the same type.
if (!thisValue.GetType().Equals(thatValue.GetType()))
{
return false;
}
Array thisValueArray = thisValue as Array;
Array thatValueArray = thatValue as Array;
if (thisValueArray.Length != thatValueArray.Length)
{
return false;
}
// Attributes can only contain single-dimension arrays, so we don't need to worry about
// multidimensional arrays.
Contract.Assert(thisValueArray.Rank == 1 && thatValueArray.Rank == 1);
for (int j = 0; j < thisValueArray.Length; j++)
{
if (!AreFieldValuesEqual(thisValueArray.GetValue(j), thatValueArray.GetValue(j)))
{
return false;
}
}
}
else
{
// An object of type Attribute will cause a stack overflow.
// However, this should never happen because custom attributes cannot contain values other than
// constants, single-dimensional arrays and typeof expressions.
Contract.Assert(!(thisValue is Attribute));
if (!thisValue.Equals(thatValue))
return false;
}
return true;
}
[System.Security.SecuritySafeCritical] // auto-generated
public override int GetHashCode()
{
Type type = GetType();
FieldInfo[] fields = type.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
Object vThis = null;
for (int i = 0; i < fields.Length; i++)
{
// Visibility check and consistency check are not necessary.
Object fieldValue = ((RtFieldInfo)fields[i]).InternalGetValue(this, false, false);
// The hashcode of an array ignores the contents of the array, so it can produce
// different hashcodes for arrays with the same contents.
// Since we do deep comparisons of arrays in Equals(), this means Equals and GetHashCode will
// be inconsistent for arrays. Therefore, we ignore hashes of arrays.
if (fieldValue != null && !fieldValue.GetType().IsArray)
vThis = fieldValue;
if (vThis != null)
break;
}
if (vThis != null)
return vThis.GetHashCode();
return type.GetHashCode();
}
#endregion
#region Public Virtual Members
public virtual Object TypeId { get { return GetType(); } }
public virtual bool Match(Object obj) { return Equals(obj); }
#endregion
#region Public Members
public virtual bool IsDefaultAttribute() { return false; }
#endregion
void _Attribute.GetTypeInfoCount(out uint pcTInfo)
{
throw new NotImplementedException();
}
void _Attribute.GetTypeInfo(uint iTInfo, uint lcid, IntPtr ppTInfo)
{
throw new NotImplementedException();
}
void _Attribute.GetIDsOfNames([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
{
throw new NotImplementedException();
}
void _Attribute.Invoke(uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
{
throw new NotImplementedException();
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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- DataMember.cs
- XmlSchemaComplexContent.cs
- diagnosticsswitches.cs
- UIElement.cs
- CodeNamespaceCollection.cs
- AssemblyName.cs
- TextDecorationCollection.cs
- TimeIntervalCollection.cs
- TrustSection.cs
- ListItemCollection.cs
- PixelShader.cs
- ScrollBar.cs
- Size3D.cs
- Camera.cs
- MyContact.cs
- Viewport3DAutomationPeer.cs
- bindurihelper.cs
- SynchronousSendBindingElement.cs
- PageFunction.cs
- RtfToken.cs
- IntersectQueryOperator.cs
- SamlAttributeStatement.cs
- MiniModule.cs
- OleDbDataReader.cs
- TraceContextRecord.cs
- ClusterRegistryConfigurationProvider.cs
- NamedElement.cs
- HttpListener.cs
- TextBreakpoint.cs
- ImageCodecInfo.cs
- XPathDocumentBuilder.cs
- COM2PictureConverter.cs
- WindowsListViewScroll.cs
- HwndTarget.cs
- InvalidComObjectException.cs
- Header.cs
- InstanceDataCollection.cs
- HttpServerVarsCollection.cs
- MeasurementDCInfo.cs
- ArgumentException.cs
- QuadraticBezierSegment.cs
- SpeechUI.cs
- EntityCodeGenerator.cs
- XmlSchemas.cs
- ArrayWithOffset.cs
- DataGridViewSortCompareEventArgs.cs
- ProxyElement.cs
- EntityCommand.cs
- MarshalByRefObject.cs
- SqlTriggerAttribute.cs
- ErrorWrapper.cs
- HtmlInputSubmit.cs
- altserialization.cs
- LinkLabel.cs
- CanonicalFontFamilyReference.cs
- ElementsClipboardData.cs
- LockCookie.cs
- NetNamedPipeSecurityElement.cs
- GlyphTypeface.cs
- InputScope.cs
- SqlComparer.cs
- EnterpriseServicesHelper.cs
- ExpressionBinding.cs
- GAC.cs
- CodeAttributeArgument.cs
- SourceLocation.cs
- WebPartCollection.cs
- ToolboxItemFilterAttribute.cs
- NumericUpDownAccelerationCollection.cs
- TypeConverterAttribute.cs
- X509CertificateStore.cs
- FlowDocument.cs
- Subset.cs
- ContentDisposition.cs
- TextureBrush.cs
- HotSpotCollection.cs
- MarshalDirectiveException.cs
- WebSysDescriptionAttribute.cs
- WebAdminConfigurationHelper.cs
- SpellerStatusTable.cs
- httpstaticobjectscollection.cs
- StdRegProviderWrapper.cs
- AssociationSetMetadata.cs
- BufferAllocator.cs
- LowerCaseStringConverter.cs
- ActivitySurrogateSelector.cs
- AssociationTypeEmitter.cs
- WindowsListViewItem.cs
- FixedSOMLineCollection.cs
- SrgsText.cs
- ValueTypeFixupInfo.cs
- CodeLinePragma.cs
- RegexGroup.cs
- securestring.cs
- NameValueSectionHandler.cs
- DesignerView.xaml.cs
- XPathSelfQuery.cs
- MiniMapControl.xaml.cs
- ComponentResourceKeyConverter.cs
- SqlColumnizer.cs