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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Collections.Generic;
using System.Runtime.Serialization;
namespace System.Reflection
{
public class ParameterInfo : ICustomAttributeProvider, IObjectReference
{
protected ParameterInfo() { }
public virtual ParameterAttributes Attributes => AttrsImpl;
public virtual MemberInfo Member => MemberImpl;
public virtual string Name => NameImpl;
public virtual Type ParameterType => ClassImpl;
public virtual int Position => PositionImpl;
public bool IsIn => (Attributes & ParameterAttributes.In) != 0;
public bool IsLcid => (Attributes & ParameterAttributes.Lcid) != 0;
public bool IsOptional => (Attributes & ParameterAttributes.Optional) != 0;
public bool IsOut => (Attributes & ParameterAttributes.Out) != 0;
public bool IsRetval => (Attributes & ParameterAttributes.Retval) != 0;
public virtual object DefaultValue { get { throw NotImplemented.ByDesign; } }
public virtual object RawDefaultValue { get { throw NotImplemented.ByDesign; } }
public virtual bool HasDefaultValue { get { throw NotImplemented.ByDesign; } }
public virtual bool IsDefined(Type attributeType, bool inherit)
{
if (attributeType == null)
throw new ArgumentNullException(nameof(attributeType));
return false;
}
public virtual IEnumerable<CustomAttributeData> CustomAttributes => GetCustomAttributesData();
public virtual IList<CustomAttributeData> GetCustomAttributesData() { throw NotImplemented.ByDesign; }
public virtual object[] GetCustomAttributes(bool inherit) => Array.Empty<object>();
public virtual object[] GetCustomAttributes(Type attributeType, bool inherit)
{
if (attributeType == null)
throw new ArgumentNullException(nameof(attributeType));
return Array.Empty<object>();
}
public virtual Type[] GetOptionalCustomModifiers() => Array.Empty<Type>();
public virtual Type[] GetRequiredCustomModifiers() => Array.Empty<Type>();
public virtual int MetadataToken => MetadataToken_ParamDef;
public object GetRealObject(StreamingContext context)
{
// Once all the serializable fields have come in we can set up the real
// instance based on just two of them (MemberImpl and PositionImpl).
if (MemberImpl == null)
throw new SerializationException(SR.Serialization_InsufficientState);
ParameterInfo[] args = null;
switch (MemberImpl.MemberType)
{
case MemberTypes.Constructor:
case MemberTypes.Method:
if (PositionImpl == -1)
{
if (MemberImpl.MemberType == MemberTypes.Method)
return ((MethodInfo)MemberImpl).ReturnParameter;
else
throw new SerializationException(SR.Serialization_BadParameterInfo);
}
else
{
args = ((MethodBase)MemberImpl).GetParametersNoCopy();
if (args != null && PositionImpl < args.Length)
return args[PositionImpl];
else
throw new SerializationException(SR.Serialization_BadParameterInfo);
}
case MemberTypes.Property:
args = ((PropertyInfo)MemberImpl).GetIndexParameters();
if (args != null && PositionImpl > -1 && PositionImpl < args.Length)
return args[PositionImpl];
else
throw new SerializationException(SR.Serialization_BadParameterInfo);
default:
throw new SerializationException(SR.Serialization_NoParameterInfo);
}
}
public override string ToString() => ParameterType.FormatTypeName() + " " + Name;
protected ParameterAttributes AttrsImpl;
protected Type ClassImpl;
protected object DefaultValueImpl;
protected MemberInfo MemberImpl;
protected string NameImpl;
protected int PositionImpl;
private const int MetadataToken_ParamDef = 0x08000000;
}
}
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