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Specify internal types by Assembly Qualified Name for reflection

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This commit is contained in:
Westin Miller
2017-08-29 19:48:29 -07:00
parent 3d6806b63a
commit 178fcb8164
1 changed files with 65 additions and 9 deletions
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70
Torch/Utils/ReflectedManager.cs
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@@ -23,6 +23,15 @@ namespace Torch.Utils
/// Declaring type of the member to access. If null, inferred from the instance argument type.
/// </summary>
public Type Type { get; set; } = null;
/// <summary>
/// Assembly qualified name of <see cref="Type"/>
/// </summary>
public string TypeName
{
get => Type?.AssemblyQualifiedName;
set => Type = value == null ? null : Type.GetType(value, true);
}
}
/// <summary>
@@ -93,6 +102,19 @@ namespace Torch.Utils
[AttributeUsage(AttributeTargets.Field)]
public class ReflectedMethodAttribute : ReflectedMemberAttribute
{
/// <summary>
/// When set the parameters types for the method are assumed to be this.
/// </summary>
public Type[] OverrideTypes { get; set; }
/// <summary>
/// Assembly qualified names of <see cref="OverrideTypes"/>
/// </summary>
public string[] OverrideTypeNames
{
get => OverrideTypes.Select(x => x.AssemblyQualifiedName).ToArray();
set => OverrideTypes = value?.Select(x => x == null ? null : Type.GetType(x)).ToArray();
}
}
/// <summary>
@@ -232,10 +254,14 @@ namespace Torch.Utils
trueParameterTypes = parameters.Skip(1).Select(x => x.ParameterType).ToArray();
}
var invokeTypes = new Type[trueParameterTypes.Length];
for (var i = 0; i < invokeTypes.Length; i++)
invokeTypes[i] = attr.OverrideTypes?[i] ?? trueParameterTypes[i];
MethodInfo methodInstance = trueType.GetMethod(attr.Name ?? field.Name,
(attr is ReflectedStaticMethodAttribute ? BindingFlags.Static : BindingFlags.Instance) |
BindingFlags.Public |
BindingFlags.NonPublic, null, CallingConventions.Any, trueParameterTypes, null);
BindingFlags.NonPublic, null, CallingConventions.Any, invokeTypes, null);
if (methodInstance == null)
{
string methodType = attr is ReflectedStaticMethodAttribute ? "static" : "instance";
@@ -245,13 +271,38 @@ namespace Torch.Utils
$"Unable to find {methodType} method {attr.Name ?? field.Name} in type {trueType.FullName} with parameters {methodParams}");
}
if (attr is ReflectedStaticMethodAttribute)
{
if (attr.OverrideTypes != null)
{
ParameterExpression[] paramExp =
parameters.Select(x => Expression.Parameter(x.ParameterType)).ToArray();
var argExp = new Expression[invokeTypes.Length];
for (var i = 0; i < argExp.Length; i++)
if (invokeTypes[i] != paramExp[i].Type)
argExp[i] = Expression.Convert(paramExp[i], invokeTypes[i]);
else
argExp[i] = paramExp[i];
field.SetValue(null,
Expression.Lambda(Expression.Call(methodInstance, argExp), paramExp)
.Compile());
}
else
field.SetValue(null, Delegate.CreateDelegate(field.FieldType, methodInstance));
}
else
{
ParameterExpression[] paramExp = parameters.Select(x => Expression.Parameter(x.ParameterType)).ToArray();
ParameterExpression[] paramExp =
parameters.Select(x => Expression.Parameter(x.ParameterType)).ToArray();
var argExp = new Expression[invokeTypes.Length];
for (var i = 0; i < argExp.Length; i++)
if (invokeTypes[i] != paramExp[i + 1].Type)
argExp[i] = Expression.Convert(paramExp[i + 1], invokeTypes[i]);
else
argExp[i] = paramExp[i + 1];
field.SetValue(null,
Expression.Lambda(Expression.Call(paramExp[0], methodInstance, paramExp.Skip(1)), paramExp)
Expression.Lambda(Expression.Call(paramExp[0], methodInstance, argExp), paramExp)
.Compile());
}
}
@@ -287,7 +338,7 @@ namespace Torch.Utils
if (trueType == null && isStatic)
throw new ArgumentException("Static field setters need their type defined", nameof(field));
if (!isStatic)
if (!isStatic && trueType == null)
trueType = parameters[0].ParameterType;
}
else if (attr is ReflectedGetterAttribute)
@@ -300,7 +351,7 @@ namespace Torch.Utils
if (trueType == null && isStatic)
throw new ArgumentException("Static field getters need their type defined", nameof(field));
if (!isStatic)
if (!isStatic && trueType == null)
trueType = parameters[0].ParameterType;
}
else
@@ -318,10 +369,15 @@ namespace Torch.Utils
$"Unable to find field or property for {trueName} in {trueType.FullName} or its base types", nameof(field));
ParameterExpression[] paramExp = parameters.Select(x => Expression.Parameter(x.ParameterType)).ToArray();
Expression instanceExpr = null;
if (!isStatic)
{
instanceExpr = trueType == paramExp[0].Type ? (Expression) paramExp[0] : Expression.Convert(paramExp[0], trueType);
}
MemberExpression fieldExp = sourceField != null
? Expression.Field(isStatic ? null : paramExp[0], sourceField)
: Expression.Property(isStatic ? null : paramExp[0], sourceProperty);
? Expression.Field(instanceExpr, sourceField)
: Expression.Property(instanceExpr, sourceProperty);
Expression impl;
if (attr is ReflectedSetterAttribute)
{