Use Java generic type parameters constraints #669
Description
generator doesn't "forward" and use generic type constraints in bindings. Consider this Java type:
package com.xamarin.android;
public interface InvokeRunnable<T extends Runnable> {
void invoke (T runnable);
}Here, T is contained to be a type that implements java.lang.Runnable.
However, the binding that generator emits is:
[Register ("com/xamarin/android/InvokeRunnable", "", "Com.Xamarin.Android.IInvokeRunnableInvoker")]
[global::Java.Interop.JavaTypeParameters (new string [] {"T extends java.lang.Runnable"})]
public partial interface IInvokeRunnable : IJavaObject, IJavaPeerable {
// Metadata.xml XPath method reference: path="/api/package[@name='com.xamarin.android']/interface[@name='InvokeRunnable']/method[@name='invoke' and count(parameter)=1 and parameter[1][@type='T']]"
[Register ("invoke", "(Ljava/lang/Runnable;)V", "GetInvoke_Ljava_lang_Runnable_Handler:Com.Xamarin.Android.IInvokeRunnableInvoker, Xamarin.Android.McwGen-Tests")]
void Invoke (global::Java.Lang.Object p0);
}The Java-side parameter, which must be a java.lang.Runnable or type implementing that interface, is bound as Java.Lang.Object.
Feature request: "forward" this constraint information, and use it in the binding, so that we instead emit:
public partial interface IInvokeRunnable : IJavaObject, IJavaPeerable {
[Register ("invoke", "(Ljava/lang/Runnable;)V", "GetInvoke_Ljava_lang_Runnable_Handler:Com.Xamarin.Android.IInvokeRunnableInvoker, Xamarin.Android.McwGen-Tests")]
void Invoke (global::Java.Lang.IRunnable p0);
}