Improvements in Reflection

- Add MethodBase.GetParameters(). - Add Type.GetConstructors(). - Add ParameterInfo class. - Add Unit Tests to cover the new classes. - Bump AssemblyNativeVersion to 100.5.0.16.
nanoframework · Jan 28, 2022 · 93df8ab · 93df8ab
1 parent a22fc17
commit 93df8ab
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diff --git a/Tests/NFUnitTestClasses/UnitTestConstructorTest.cs b/Tests/NFUnitTestClasses/UnitTestConstructorTest.cs
@@ -362,6 +362,163 @@ public void Constructors64_Test()
             Assert.True(ConstructorsTestClass64.testMethod());
         }
 
+        [TestMethod]
+        public void ConstructorName_01()
+        {
+            var classToTest = typeof(ClassWith3Constructors);
+
+            ConstructorInfo[] constructors = classToTest.GetConstructors();
+
+            Assert.Equal(3, constructors.Length, $"Expecting 3 constructors, got {constructors.Length}.");
+
+            foreach (ConstructorInfo constructorInfo in constructors)
+            {
+                Assert.Equal(constructorInfo.Name, ".ctor", $"Expecting '.ctor' as constructor name, but got: {constructorInfo.Name}");
+            }
+        }
+
+        [TestMethod]
+        public void ConstructorName_02()
+        {
+            var classToTest = typeof(ConstructorsTestClass2);
+
+            ConstructorInfo[] constructors = classToTest.GetConstructors();
+
+            Assert.Equal(1, constructors.Length, $"Expecting 1 constructor, got {constructors.Length}.");
+
+            foreach (ConstructorInfo constructorInfo in constructors)
+            {
+                Assert.Equal(constructorInfo.Name, ".ctor", $"Expecting '.ctor' as constructor name, but got: {constructorInfo.Name}");
+            }
+        }
+
+        [TestMethod]
+        public void ConstructorName_03()
+        {
+            // constructor without modifier
+            var classToTest = typeof(ConstructorsTestClass3);
+
+            ConstructorInfo[] constructors = classToTest.GetConstructors();
+
+            Assert.Equal(1, constructors.Length, $"Expecting 1 constructor, got {constructors.Length}.");
+
+            foreach (ConstructorInfo constructorInfo in constructors)
+            {
+                Assert.Equal(constructorInfo.Name, ".ctor", $"Expecting '.ctor' as constructor name, but got: {constructorInfo.Name}");
+            }
+        }
+
+        [TestMethod]
+        public void ConstructorName_04()
+        {
+            // internal constructor 
+            var classToTest = typeof(ConstructorsTestClass5);
+
+            ConstructorInfo[] constructors = classToTest.GetConstructors();
+
+            Assert.Equal(1, constructors.Length, $"Expecting 1 constructor, got {constructors.Length}.");
+
+            foreach (ConstructorInfo constructorInfo in constructors)
+            {
+                Assert.Equal(constructorInfo.Name, ".ctor", $"Expecting '.ctor' as constructor name, but got: {constructorInfo.Name}");
+            }
+        }
+
+        [TestMethod]
+        public void ConstructorName_05()
+        {
+            // private constructor 
+            var classToTest = typeof(ConstructorsTestClass6);
+
+            ConstructorInfo[] constructors = classToTest.GetConstructors();
+
+            Assert.Equal(1, constructors.Length, $"Expecting 1 constructor, got {constructors.Length}.");
+
+            foreach (ConstructorInfo constructorInfo in constructors)
+            {
+                Assert.Equal(constructorInfo.Name, ".ctor", $"Expecting '.ctor' as constructor name, but got: {constructorInfo.Name}");
+            }
+        }
+
+        [TestMethod]
+        public void ConstructorName_06()
+        {
+            // static constructor 
+            var classToTest = typeof(ConstructorsTestClass35);
+
+            ConstructorInfo[] constructors = classToTest.GetConstructors();
+
+            Assert.Equal(1, constructors.Length, $"Expecting 1 constructor, got {constructors.Length}.");
+
+            foreach (ConstructorInfo constructorInfo in constructors)
+            {
+                Assert.Equal(constructorInfo.Name, ".ctor", $"Expecting '.ctor' as constructor name, but got: {constructorInfo.Name}");
+            }
+        }
+
+        [TestMethod]
+        public void ConstructorName_07()
+        {
+            // constructor for base class
+            var classToTest = typeof(ConstructorsTestClass44_Base);
+
+            ConstructorInfo[] constructors = classToTest.GetConstructors();
+
+            Assert.Equal(2, constructors.Length, $"Expecting 2 constructors, got {constructors.Length}.");
+
+            foreach (ConstructorInfo constructorInfo in constructors)
+            {
+                Assert.Equal(constructorInfo.Name, ".ctor", $"Expecting '.ctor' as constructor name, but got: {constructorInfo.Name}");
+            }
+        }
+
+        [TestMethod]
+        public void ConstructorName_08()
+        {
+            // constructor for derived class
+            var classToTest = typeof(ConstructorsTestClass44);
+
+            ConstructorInfo[] constructors = classToTest.GetConstructors();
+
+            Assert.Equal(3, constructors.Length, $"Expecting 3 constructors, got {constructors.Length}.");
+
+            foreach (ConstructorInfo constructorInfo in constructors)
+            {
+                Assert.Equal(constructorInfo.Name, ".ctor", $"Expecting '.ctor' as constructor name, but got: {constructorInfo.Name}");
+            }
+        }
+
+        [TestMethod]
+        public void ConstructorParametersInfo_01()
+        {
+            var classToTest = typeof(ClassWith3Constructors);
+
+            ConstructorInfo[] constructors = classToTest.GetConstructors();
+
+            // get ParameterInfo for 1st constructor
+            ParameterInfo[] constructorParameters = constructors[0].GetParameters();
+
+            OutputHelper.WriteLine("Checking parameters for 1st constructor of ClassWith3Constructors");
+            Assert.Equal(0, constructorParameters.Length, $"Expecting no parameters, got {constructorParameters.Length}.");
+
+            // get ParameterInfo for 2nd constructor
+            constructorParameters = constructors[1].GetParameters();
+
+            Assert.Equal(1, constructorParameters.Length, $"Expecting 1 parameter, got {constructorParameters.Length}.");
+
+            OutputHelper.WriteLine("Checking parameters for 2nd constructor of ClassWith3Constructors");
+            Assert.Equal(constructorParameters[0].ParameterType.ToString(), $"{typeof(int)}", $"Expecting parameter of type {typeof(int)}, got {constructorParameters[0].ParameterType}.");
+
+            // get ParameterInfo for 3rd constructor
+            constructorParameters = constructors[2].GetParameters();
+
+            Assert.Equal(1, constructorParameters.Length, $"Expecting 2 parameters, got {constructorParameters.Length}.");
+
+            OutputHelper.WriteLine("Checking parameters for 3rd constructor of ClassWith3Constructors");
+            Assert.Equal(constructorParameters[0].ParameterType.ToString(), $"{typeof(int)}", $"Expecting parameter of type {typeof(int)}, got {constructorParameters[0].ParameterType}.");
+            Assert.Equal(constructorParameters[1].ParameterType.ToString(), $"{typeof(string)}", $"Expecting parameter of type {typeof(string)}, got {constructorParameters[0].ParameterType}.");
+        }
+
         //Constructors Test Classes
         class ConstructorsTestClass1
         {
@@ -1567,5 +1724,22 @@ public static bool testMethod()
                 return true;
             }
         }
+
+        public class ClassWith3Constructors
+        {
+            public int intValue = 0;
+            public string stringValue = "";
+
+            public ClassWith3Constructors() { }
+
+            public ClassWith3Constructors(int intValue) { this.intValue = intValue; }
+
+            public ClassWith3Constructors(int intValue, string stringValue)
+            {
+                this.intValue = intValue;
+                this.stringValue = stringValue;
+            }
+        }
+
     }
 }
diff --git a/nanoFramework.CoreLibrary/CoreLibrary.nfproj b/nanoFramework.CoreLibrary/CoreLibrary.nfproj
@@ -140,6 +140,7 @@
     <Compile Include="System\Reflection\AssemblyReflectionAttributes.cs" />
     <Compile Include="System\Reflection\Binder.cs" />
     <Compile Include="System\Reflection\BindingFlags.cs" />
+    <Compile Include="System\Reflection\ParameterInfo.cs" />
     <Compile Include="System\Reflection\ConstructorInfo.cs" />
     <Compile Include="System\Reflection\CustomAttributesHelpers.cs" />
     <Compile Include="System\Reflection\DefaultMemberAttribute.cs" />

diff --git a/nanoFramework.CoreLibrary/System/AssemblyInfo.cs b/nanoFramework.CoreLibrary/System/AssemblyInfo.cs
@@ -13,4 +13,4 @@
 [assembly: AssemblyProduct(".NET nanoFramework mscorlib")]
 [assembly: AssemblyCopyright("Copyright (c) .NET Foundation and Contributors")]
 
-[assembly: AssemblyNativeVersion("100.5.0.15")]
+[assembly: AssemblyNativeVersion("100.5.0.16")]
diff --git a/nanoFramework.CoreLibrary/System/Reflection/MethodBase.cs b/nanoFramework.CoreLibrary/System/Reflection/MethodBase.cs
@@ -18,6 +18,9 @@ namespace System.Reflection
     [Serializable]
     public abstract class MethodBase : MemberInfo
     {
+        // required to store native
+        private int _token;
+
         /// <summary>
         /// Gets a value indicating whether this is a public method.
         /// </summary>
@@ -78,6 +81,12 @@ public extern bool IsAbstract
             get;
         }
 
+        /// <summary>
+        /// When overridden in a derived class, gets the parameters of the specified method or constructor.
+        /// </summary>
+        /// <returns>An array of type <see cref="ParameterInfo"/> containing information that matches the signature of the method (or constructor) reflected by this <see cref="MethodBase"/> instance.</returns>
+        public abstract ParameterInfo[] GetParameters();
+
         /// <summary>
         /// Invokes the method or constructor represented by the current instance, using the specified parameters.
         /// </summary>
@@ -114,6 +123,9 @@ public override extern Type DeclaringType
             [MethodImpl(MethodImplOptions.InternalCall)]
             get;
         }
+
+        [MethodImpl(MethodImplOptions.InternalCall)]
+        internal extern ParameterInfo[] GetParametersNative();
     }
 }
 

diff --git a/nanoFramework.CoreLibrary/System/Reflection/ParameterInfo.cs b/nanoFramework.CoreLibrary/System/Reflection/ParameterInfo.cs
@@ -0,0 +1,33 @@
+//
+// Copyright (c) .NET Foundation and Contributors
+// Portions Copyright (c) Microsoft Corporation.  All rights reserved.
+// See LICENSE file in the project root for full license information.
+//
+
+#if NANOCLR_REFLECTION
+
+namespace System.Reflection
+{
+    using Runtime.CompilerServices;
+    using System;
+
+    /// <summary>
+    /// Discovers the attributes of a parameter and provides access to parameter metadata.
+    /// </summary>
+    /// <remarks>Available only in mscorlib build with support for System.Reflection.</remarks>
+    [Serializable]
+    public abstract class ParameterInfo
+    {
+#pragma warning disable S3459 // required to fill in in native code
+        private readonly Type _parameterType;
+#pragma warning restore S3459 // Unassigned members should be removed
+
+        /// <summary>
+        /// Gets the <see cref="Type"/> of this parameter.
+        /// </summary>
+        /// <value>The <see cref="Type"/> object that represents the <see cref="Type"/> of this parameter.</value>
+        public virtual Type ParameterType => _parameterType;
+    }
+}
+
+#endif // NANOCLR_REFLECTION
diff --git a/nanoFramework.CoreLibrary/System/Reflection/RuntimeConstructorInfo.cs b/nanoFramework.CoreLibrary/System/Reflection/RuntimeConstructorInfo.cs
@@ -9,10 +9,15 @@
 namespace System.Reflection
 {
     using System;
+    using System.Runtime.CompilerServices;
 
     [Serializable]
     internal sealed class RuntimeConstructorInfo : ConstructorInfo
     {
+        public override ParameterInfo[] GetParameters()
+        {
+            return GetParametersNative();
+        }
     }
 }
 

diff --git a/nanoFramework.CoreLibrary/System/Reflection/RuntimeMethodInfo.cs b/nanoFramework.CoreLibrary/System/Reflection/RuntimeMethodInfo.cs
@@ -25,6 +25,11 @@ public override object[] GetCustomAttributes(bool inherit)
             return CustomAttributesHelpers.GetCustomAttributesInternal(GetCustomAttributesNative(inherit));
         }
 
+        public override ParameterInfo[] GetParameters()
+        {
+            return GetParametersNative();
+        }
+
         [MethodImpl(MethodImplOptions.InternalCall)]
         private extern object[] GetCustomAttributesNative(bool inherit);
     }

diff --git a/nanoFramework.CoreLibrary/System/Type.cs b/nanoFramework.CoreLibrary/System/Type.cs
@@ -148,6 +148,15 @@ public abstract Type BaseType
         [MethodImpl(MethodImplOptions.InternalCall)]
         public extern ConstructorInfo GetConstructor(Type[] types);
 
+        /// <summary>
+        /// Returns all the public constructors defined for the current <see cref="Type"/>.
+        /// </summary>
+        /// <returns>
+        /// An array of <see cref="ConstructorInfo"/> objects representing all the public instance constructors defined for the current <see cref="Type"/>, but not including the type initializer (static constructor). If no public instance constructors are defined for the current <see cref="Type"/>, or if the current <see cref="Type"/> represents a type parameter in the definition of a generic type or generic method, an empty array of type <see cref="ConstructorInfo"/> is returned.
+        /// </returns>
+        [MethodImpl(MethodImplOptions.InternalCall)]
+        public extern ConstructorInfo[] GetConstructors();
+
         /// <summary>
         /// Searches for the specified public method whose parameters match the specified argument types.
         /// </summary>