rename away from "getSubject"

Author: Justin Brinegar

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/util/subject/ClassicGetSubject.java renamed to hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/util/subject/ClassicSubjectAdapter.java

@@ -23,11 +23,11 @@
 import java.security.AccessController;
 
 /**
- * Calls Subject.getSubject() directly, as this class should not be classloaded on Java 18 and above
+ * Calls Subject methods directly, as this class should not be classloaded on Java 18 and above
  */
-class ClassicGetSubject implements HiddenGetSubject {
+class ClassicSubjectAdapter implements HiddenSubjectAdapter {
 
-    ClassicGetSubject() {}
+    ClassicSubjectAdapter() {}
 
     @Override
     public Subject getSubject() {

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/util/subject/HiddenGetSubject.java renamed to hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/util/subject/HiddenSubjectAdapter.java

@@ -20,6 +20,6 @@
 
 import javax.security.auth.Subject;
 
-public interface HiddenGetSubject {
+public interface HiddenSubjectAdapter {
     Subject getSubject();
 }

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/util/subject/SubjectAdapter.java

@@ -30,16 +30,16 @@
  */
 public class SubjectAdapter {
     private static Logger log = LoggerFactory.getLogger(SubjectAdapter.class);
-    private static final HiddenGetSubject instance;
+    private static final HiddenSubjectAdapter instance;
     static {
         int version = 0;
         try {
             version = Integer.parseInt(System.getProperty("java.specification.version"));
         } catch (Throwable ignored) {}
         if (version >= 18) {
-            instance = new GetSubjectJava18AndAbove();
+            instance = new SubjectAdapterJava18AndAbove();
         } else {
-            instance = new ClassicGetSubject();
+            instance = new ClassicSubjectAdapter();
         }
     }
 

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/util/subject/GetSubjectJava18AndAbove.java renamed to hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/util/subject/SubjectAdapterJava18AndAbove.java

@@ -25,10 +25,10 @@
 /**
  * Indirectly calls Subject.current(), which exists in Java 18 and above only
  */
-class GetSubjectJava18AndAbove implements HiddenGetSubject {
+class SubjectAdapterJava18AndAbove implements HiddenSubjectAdapter {
     private final Method currentMethod;
 
-    GetSubjectJava18AndAbove() {
+    SubjectAdapterJava18AndAbove() {
         try {
             currentMethod = Subject.class.getMethod("current");
         } catch (NoSuchMethodException e) {