Bump to dotnet/java-interop@7a058c0e (dotnet#9066)

Fixes: dotnet#9038

Changes: dotnet/java-interop@ccafbe6...7a058c0

  * dotnet/java-interop@7a058c0e: [Java.Interop] Add `IJavaPeerable.JavaAs()` extension method (dotnet/java-interop#1234)
  * dotnet/java-interop@6f9defa5: Bump to dotnet/android-tools@3debf8e0 (dotnet/java-interop#1236)
  * dotnet/java-interop@6923fb89: [ci] Add dependabot branches to build triggers (dotnet/java-interop#1233)
  * dotnet/java-interop@573028f3: [ci] Use macOS 13 Ventura build agents (dotnet/java-interop#1235)

dotnet/java-interop@7a058c0e adds a new `IJavaPeerable.JavaAs<T>()`
extension method, to perform type casts which return `null` when
the cast will not succeed instead of throwing an exception.

Update `AndroidValueManager.CreatePeer()` to check for Java-side
type compatibility (by way of `TypeManager.CreateInstance()`).
Previously, this would not throw:

	var instance        = …
	var r               = instance.PeerReference;
	var wrap_instance   = JniRuntime.CurrentRuntime.ValueManager.CreatePeer (
	        reference: ref r,
	        options: JniObjectReferenceOptions.Copy,
	        targetType: typeof (SomeInterfaceThatInstanceDoesNotImplement));
	// `wrap_instance` is not null, `.CreatePeer()` does not throw

	wrap_instance.SomeMethod();
	// will throw, due to a type mismatch.

`AndroidValueManager.CreatePeer()` will now return `null` if the
Java instance referenced by the `reference:` parameter is not
convertible to `targetType`, as per [`JNIEnv::IsAssignableFrom()`][0].

[0]: https://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/functions.html#IsAssignableFrom

src/Mono.Android/Android.Runtime/JNIEnvInit.cs

@@ -50,7 +50,7 @@ internal struct JnienvInitializeArgs {
 		internal static IntPtr java_class_loader;
 		internal static JniMethodInfo? mid_Class_forName;
 
-		static AndroidRuntime? androidRuntime;
+		internal static AndroidRuntime? androidRuntime;
 
 		[UnmanagedCallersOnly]
 		static unsafe void RegisterJniNatives (IntPtr typeName_ptr, int typeName_len, IntPtr jniClass, IntPtr methods_ptr, int methods_len)

src/Mono.Android/Java.Interop/TypeManager.cs

@@ -267,7 +267,7 @@ internal static IJavaPeerable CreateInstance (IntPtr handle, JniHandleOwnership
 
 		[UnconditionalSuppressMessage ("Trimming", "IL2067", Justification = "TypeManager.CreateProxy() does not statically know the value of the 'type' local variable.")]
 		[UnconditionalSuppressMessage ("Trimming", "IL2072", Justification = "TypeManager.CreateProxy() does not statically know the value of the 'type' local variable.")]
-		internal static IJavaPeerable CreateInstance (IntPtr handle, JniHandleOwnership transfer, Type? targetType)
+		internal static IJavaPeerable? CreateInstance (IntPtr handle, JniHandleOwnership transfer, Type? targetType)
 		{
 			Type? type = null;
 			IntPtr class_ptr = JNIEnv.GetObjectClass (handle);
@@ -318,6 +318,26 @@ internal static IJavaPeerable CreateInstance (IntPtr handle, JniHandleOwnership
 				type = invokerType;
 			}
 
+			var typeSig  = JNIEnvInit.androidRuntime?.TypeManager.GetTypeSignature (type) ?? default;
+			if (!typeSig.IsValid || typeSig.SimpleReference == null) {
+				throw new ArgumentException ($"Could not determine Java type corresponding to `{type.AssemblyQualifiedName}`.", nameof (targetType));
+			}
+			JniObjectReference typeClass;
+			try {
+				typeClass = JniEnvironment.Types.FindClass (typeSig.SimpleReference);
+			} catch (Exception e) {
+				throw new ArgumentException ($"Could not find Java class `{typeSig.SimpleReference}`.",
+						nameof (targetType),
+						e);
+			}
+
+			var handleClass = JniEnvironment.Types.GetObjectClass (new JniObjectReference (handle));
+			if (!JniEnvironment.Types.IsAssignableFrom (handleClass, typeClass)) {
+				Logger.Log (LogLevel.Info, "*jonp*", $"# jonp: can't assign `{GetClassName(handleClass.Handle)}` to `{GetClassName(typeClass.Handle)}`");
+				JniObjectReference.Dispose (ref handleClass);
+				JniObjectReference.Dispose (ref typeClass);
+				return null;
+			}
 
 			IJavaPeerable? result = null;
 

tests/Mono.Android-Tests/Java.Interop/JavaObjectExtensionsTests.cs

@@ -56,6 +56,14 @@ public void JavaCast_CheckForManagedSubclasses ()
 			}
 		}
 
+		[Test]
+		public void JavaAs ()
+		{
+			using var v     = new Java.InteropTests.MyJavaInterfaceImpl ();
+			using var c     = v.JavaAs<Java.Lang.ICloneable>();
+			Assert.IsNotNull (c);
+		}
+
 		static Java.Lang.Object CreateObject ()
 		{
 			var ctor    = JNIEnv.GetMethodID (Java.Lang.Class.Object, "<init>", "()V");