JDK 10 RFR of JDK-8146726: Refactor AbstractProcessor to use Set.of and related methods

[joe darcy]

Hello,

With JDK 9 APIs now available for use in java.compiler, please the patch 
below to address

     JDK-8146726: Refactor AbstractProcessor to use Set.of and related 
methods

Thanks,

-Joe

diff -r fd458b0b7749 
src/java.compiler/share/classes/javax/annotation/processing/AbstractProcessor.java
--- 
a/src/java.compiler/share/classes/javax/annotation/processing/AbstractProcessor.java 
Wed Oct 25 10:40:45 2017 -0700
+++ 
b/src/java.compiler/share/classes/javax/annotation/processing/AbstractProcessor.java 
Thu Oct 26 11:15:58 2017 -0700
@@ -80,10 +80,7 @@
       */
      public Set<String> getSupportedOptions() {
          SupportedOptions so = 
this.getClass().getAnnotation(SupportedOptions.class);
-        if  (so == null)
-            return Collections.emptySet();
-        else
-            return arrayToSet(so.value(), false);
+        return (so == null) ? Collections.emptySet() : Set.of(so.value());
      }

      /**
@@ -198,15 +195,15 @@
      private static Set<String> arrayToSet(String[] array,
                                            boolean stripModulePrefixes) {
          assert array != null;
-        Set<String> set = new HashSet<>(array.length);
-        for (String s : array) {
-            if (stripModulePrefixes) {
+        if (stripModulePrefixes) {
+            array = array.clone();
+            for (int i = 0; i < array.length; i++) {
+                String s = array[i];
                  int index = s.indexOf('/');
                  if (index != -1)
-                    s = s.substring(index + 1);
+                    array[i] = s.substring(index + 1);
              }
-            set.add(s);
          }
-        return Collections.unmodifiableSet(set);
+        return Set.of(array);
      }
  }