JDK 10 RFR of JDK-8193191: Update JavacTestingAbstractProcessor for JDK 10

[joe darcy]

Hello,

Please review the straightforward patch below to update the 
JavacTestingAbstractProcessor utility superclass to JDK 10.

      JDK-8193191: Update JavacTestingAbstractProcessor for JDK 10

Besides the use of Set.of, most of the updates are just bumping 
@SupportedSourceVersion annotation from 9 to 10.

Thanks,

-Joe

diff -r 56d3576aadd5 
test/langtools/tools/javac/lib/JavacTestingAbstractProcessor.java
--- a/test/langtools/tools/javac/lib/JavacTestingAbstractProcessor.java 
Mon Dec 04 19:12:57 2017 +0100
+++ b/test/langtools/tools/javac/lib/JavacTestingAbstractProcessor.java 
Thu Dec 07 09:04:27 2017 -0800
@@ -1,5 +1,5 @@
  /*
- * Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights 
reserved.
+ * Copyright (c) 2010, 2017, Oracle and/or its affiliates. All rights 
reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
@@ -31,13 +31,7 @@
   * An abstract annotation processor tailored to {@code javac} 
regression testing.
   */
  public abstract class JavacTestingAbstractProcessor extends 
AbstractProcessor {
-    private static final Set<String> allAnnotations;
-
-    static {
-        Set<String> tmp = new HashSet<>();
-        tmp.add("*");
-        allAnnotations = Collections.unmodifiableSet(tmp);
-    }
+    private static final Set<String> allAnnotations = Set.of("*");

      protected Elements eltUtils;
      protected Elements elements;
@@ -116,7 +110,7 @@
       * corresponding platform visitor type.
       */

-    @SupportedSourceVersion(RELEASE_9)
+    @SupportedSourceVersion(RELEASE_10)
      public static abstract class AbstractAnnotationValueVisitor<R, P> 
extends AbstractAnnotationValueVisitor9<R, P> {

          /**
@@ -127,7 +121,7 @@
          }
      }

-    @SupportedSourceVersion(RELEASE_9)
+    @SupportedSourceVersion(RELEASE_10)
      public static abstract class AbstractElementVisitor<R, P> extends 
AbstractElementVisitor9<R, P> {
          /**
           * Constructor for concrete subclasses to call.
@@ -137,7 +131,7 @@
          }
      }

-    @SupportedSourceVersion(RELEASE_9)
+    @SupportedSourceVersion(RELEASE_10)
      public static abstract class AbstractTypeVisitor<R, P> extends 
AbstractTypeVisitor9<R, P> {
          /**
           * Constructor for concrete subclasses to call.
@@ -147,7 +141,7 @@
          }
      }

-    @SupportedSourceVersion(RELEASE_9)
+    @SupportedSourceVersion(RELEASE_10)
      public static class ElementKindVisitor<R, P> extends 
ElementKindVisitor9<R, P> {
          /**
           * Constructor for concrete subclasses; uses {@code null} for the
@@ -168,7 +162,7 @@
          }
      }

-    @SupportedSourceVersion(RELEASE_9)
+    @SupportedSourceVersion(RELEASE_10)
      public static class ElementScanner<R, P> extends 
ElementScanner9<R, P> {
          /**
           * Constructor for concrete subclasses; uses {@code null} for the
@@ -187,7 +181,7 @@
          }
      }

-    @SupportedSourceVersion(RELEASE_9)
+    @SupportedSourceVersion(RELEASE_10)
      public static class SimpleAnnotationValueVisitor<R, P> extends 
SimpleAnnotationValueVisitor9<R, P> {
          /**
           * Constructor for concrete subclasses; uses {@code null} for the
@@ -208,7 +202,7 @@
          }
      }

-    @SupportedSourceVersion(RELEASE_9)
+    @SupportedSourceVersion(RELEASE_10)
      public static class SimpleElementVisitor<R, P> extends 
SimpleElementVisitor9<R, P> {
          /**
           * Constructor for concrete subclasses; uses {@code null} for the
@@ -229,7 +223,7 @@
          }
      }

-    @SupportedSourceVersion(RELEASE_9)
+    @SupportedSourceVersion(RELEASE_10)
      public static class SimpleTypeVisitor<R, P> extends 
SimpleTypeVisitor9<R, P> {
          /**
           * Constructor for concrete subclasses; uses {@code null} for the
@@ -250,7 +244,7 @@
          }
      }

-    @SupportedSourceVersion(RELEASE_9)
+    @SupportedSourceVersion(RELEASE_10)
      public static class TypeKindVisitor<R, P> extends 
TypeKindVisitor9<R, P> {
          /**
           * Constructor for concrete subclasses to call; uses {@code null}