Do runtime type checking in Typed.supports method

There are situations where we cannot solely rely on the compiler.
For example, with DataHandle plugins, the generic parameter L is
heterogeneous, so we need to actually check the type of the data.

I tried to make this the default implementation of the Typed interface
itself, but ran into problems with calling super.supports in downstream
classes; apparently, you cannot directly reference default interface
methods by writing e.g. Typed.super.supports(...)? Strange.

Author: ctrueden

src/main/java/org/scijava/plugin/AbstractTypedPlugin.java

@@ -43,5 +43,15 @@
 public abstract class AbstractTypedPlugin<D> extends AbstractRichPlugin
 	implements TypedPlugin<D>
 {
-	// NB: No implementation needed.
+	// -- Typed methods --
+
+	@Override
+	public boolean supports(final D data) {
+		// NB: Even though the compiler will often guarantee that only data
+		// of type T is provided here, we still need the runtime check
+		// for cases where the exact type is not known to compiler --
+		// e.g., if the object was manufactured by reflection.
+		return getType().isInstance(data);
+	}
+
 }