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Reduce the number of members on ModelMetadataIdentity (#15280) 

* Reduce the number of members on ModelMetadataIdentity

ModelMetadataIdentity is a discriminated union. We recently introduced an additional member on this type,
but are concerned about the performance implication of doing this. This change uses a discriminated field
to reset the member count to 3.0.
This commit is contained in:
Pranav K 2019-10-23 15:38:21 -07:00 committed by GitHub
parent 9bb9fc3bdc
commit 8c77190db5
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 10 additions and 10 deletions
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4
src/Mvc/Mvc.Abstractions/ref/Microsoft.AspNetCore.Mvc.Abstractions.netcoreapp.cs
View File

@ -882,8 +882,8 @@ namespace Microsoft.AspNetCore.Mvc.ModelBinding.Metadata
public Microsoft.AspNetCore.Mvc.ModelBinding.Metadata.ModelMetadataKind MetadataKind { get { throw null; } }
public System.Type ModelType { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } }
public string Name { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } }
public System.Reflection.ParameterInfo ParameterInfo { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } }
public System.Reflection.PropertyInfo PropertyInfo { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } }
public System.Reflection.ParameterInfo ParameterInfo { get { throw null; } }
public System.Reflection.PropertyInfo PropertyInfo { get { throw null; } }
public bool Equals(Microsoft.AspNetCore.Mvc.ModelBinding.Metadata.ModelMetadataIdentity other) { throw null; }
public override bool Equals(object obj) { throw null; }
public static Microsoft.AspNetCore.Mvc.ModelBinding.Metadata.ModelMetadataIdentity ForParameter(System.Reflection.ParameterInfo parameter) { throw null; }

16
src/Mvc/Mvc.Abstractions/src/ModelBinding/Metadata/ModelMetadataIdentity.cs
View File

@ -17,14 +17,12 @@ namespace Microsoft.AspNetCore.Mvc.ModelBinding.Metadata
Type modelType,
string name = null,
Type containerType = null,
ParameterInfo parameterInfo = null,
PropertyInfo propertyInfo = null)
object fieldInfo = null)
{
ModelType = modelType;
Name = name;
ContainerType = containerType;
ParameterInfo = parameterInfo;
PropertyInfo = propertyInfo;
FieldInfo = fieldInfo;
}
/// <summary>
@ -100,7 +98,7 @@ namespace Microsoft.AspNetCore.Mvc.ModelBinding.Metadata
throw new ArgumentNullException(nameof(containerType));
}
return new ModelMetadataIdentity(modelType, propertyInfo.Name, containerType, propertyInfo: propertyInfo);
return new ModelMetadataIdentity(modelType, propertyInfo.Name, containerType, fieldInfo: propertyInfo);
}
/// <summary>
@ -130,7 +128,7 @@ namespace Microsoft.AspNetCore.Mvc.ModelBinding.Metadata
throw new ArgumentNullException(nameof(modelType));
}
return new ModelMetadataIdentity(modelType, parameter.Name, parameterInfo: parameter);
return new ModelMetadataIdentity(modelType, parameter.Name, fieldInfo: parameter);
}
/// <summary>
@ -172,17 +170,19 @@ namespace Microsoft.AspNetCore.Mvc.ModelBinding.Metadata
/// </summary>
public string Name { get; }
private object FieldInfo { get; }
/// <summary>
/// Gets a descriptor for the parameter, or <c>null</c> if this instance
/// does not represent a parameter.
/// </summary>
public ParameterInfo ParameterInfo { get; }
public ParameterInfo ParameterInfo => FieldInfo as ParameterInfo;
/// <summary>
/// Gets a descriptor for the property, or <c>null</c> if this instance
/// does not represent a property.
/// </summary>
public PropertyInfo PropertyInfo { get; }
public PropertyInfo PropertyInfo => FieldInfo as PropertyInfo;
/// <inheritdoc />
public bool Equals(ModelMetadataIdentity other)