Summary

Retrofit java.lang.reflect.Parameter to implement java.lang.reflect.Member.

Problem

Unnecessarily broad least-common supertype of Parameter and similar reflection modeling classes.

Solution

Retrofit java.lang.reflect.Parameter to implement java.lang.reflect.Member, adding an implemention of the one missing method.

Specification

diff --git a/src/java.base/share/classes/java/lang/reflect/Parameter.java b/src/java.base/share/classes/java/lang/r
eflect/Parameter.java
index 780319585ab..7e7f7dd59f6 100644
--- a/src/java.base/share/classes/java/lang/reflect/Parameter.java
+++ b/src/java.base/share/classes/java/lang/reflect/Parameter.java
@@ -27,6 +27,7 @@ package java.lang.reflect;
 import java.lang.annotation.*;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Set;
 import java.util.Objects;
 import sun.reflect.annotation.AnnotationSupport;

@@ -39,7 +40,7 @@ import sun.reflect.annotation.AnnotationSupport;
  *
  * @since 1.8
  */
-public final class Parameter implements AnnotatedElement {
+public final class Parameter implements AnnotatedElement, Member {

     private final String name;
     private final int modifiers;
@@ -148,6 +149,19 @@ public final class Parameter implements AnnotatedElement {
         return executable;
     }

+    /**
+     * {@return the class object of the {@code Executable} declaring
+     * this parameter}
+     * @implSpec
+     * The returned value is equal to {@code
+     * getDeclaringExecutable().getDeclaringClass()}.
+     * @since 19
+     */
+    @Override
+    public Class<?> getDeclaringClass() {
+        return executable.getDeclaringClass();
+    }
+
     /**
      * {@return the Java language {@linkplain Modifier modifiers} for
      * the parameter represented by this object}