Mark all Java classes that can be final as final and add check in jt

Author: eregon

src/main/java/org/truffleruby/RubyFileTypeDetector.java

@@ -25,7 +25,7 @@
 
 import com.oracle.truffle.api.TruffleFile;
 
-public class RubyFileTypeDetector implements TruffleFile.FileTypeDetector {
+public final class RubyFileTypeDetector implements TruffleFile.FileTypeDetector {
 
     private static final String[] KNOWN_RUBY_FILES = new String[]{ "Gemfile", "Rakefile" };
     private static final String[] KNOWN_RUBY_SUFFIXES = new String[]{ ".rb", ".rake", ".gemspec" };

src/main/java/org/truffleruby/algorithms/Randomizer.java

@@ -26,7 +26,7 @@
  ***** END LICENSE BLOCK *****/
 package org.truffleruby.algorithms;
 
-public class Randomizer {
+public final class Randomizer {
 
     private static final int N = 624;
     private static final int M = 397;

src/main/java/org/truffleruby/aot/ParserCache.java

@@ -28,7 +28,7 @@
 
 import com.oracle.truffle.api.TruffleOptions;
 
-public class ParserCache {
+public final class ParserCache {
 
     public static final Map<String, RootParseNode> INSTANCE;
 

src/main/java/org/truffleruby/builtins/CoreMethodNodeManager.java

@@ -54,7 +54,7 @@
 import com.oracle.truffle.api.TruffleOptions;
 import com.oracle.truffle.api.dsl.NodeFactory;
 
-public class CoreMethodNodeManager {
+public final class CoreMethodNodeManager {
 
     private final RubyContext context;
     private final RubyLanguage language;
@@ -509,7 +509,7 @@ public static NodeFactory<? extends RubyBaseNode> loadNodeFactory(String nodeFac
         return (NodeFactory<? extends RubyBaseNode>) instance;
     }
 
-    public static class MethodDetails {
+    public static final class MethodDetails {
 
         private final String moduleName;
         private final CoreMethod methodAnnotation;

src/main/java/org/truffleruby/builtins/EnumeratorSizeNode.java

@@ -19,7 +19,7 @@
 import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 
-public class EnumeratorSizeNode extends RubyContextSourceNode {
+public final class EnumeratorSizeNode extends RubyContextSourceNode {
 
     @Child private RubyNode method;
     @Child private DispatchNode toEnumWithSize;

src/main/java/org/truffleruby/builtins/PrimitiveManager.java

@@ -24,7 +24,7 @@
 import org.truffleruby.options.LanguageOptions;
 
 /** Manages the available primitive calls. */
-public class PrimitiveManager {
+public final class PrimitiveManager {
 
     private final Map<String, String> lazyPrimitiveClasses = new ConcurrentHashMap<>();
 

src/main/java/org/truffleruby/builtins/PrimitiveNodeConstructor.java

@@ -22,7 +22,7 @@
 import com.oracle.truffle.api.dsl.NodeFactory;
 import com.oracle.truffle.api.source.Source;
 
-public class PrimitiveNodeConstructor {
+public final class PrimitiveNodeConstructor {
 
     private final Primitive annotation;
     private final NodeFactory<? extends RubyBaseNode> factory;

src/main/java/org/truffleruby/builtins/ReRaiseInlinedExceptionNode.java

@@ -22,7 +22,7 @@
 
 import java.util.Arrays;
 
-public class ReRaiseInlinedExceptionNode extends RubyContextSourceNode {
+public final class ReRaiseInlinedExceptionNode extends RubyContextSourceNode {
 
     public final NodeFactory<? extends RubyBaseNode> nodeFactory;
 

src/main/java/org/truffleruby/builtins/ReturnEnumeratorIfNoBlockNode.java

@@ -20,7 +20,7 @@
 import com.oracle.truffle.api.frame.VirtualFrame;
 import com.oracle.truffle.api.profiles.ConditionProfile;
 
-public class ReturnEnumeratorIfNoBlockNode extends RubyContextSourceNode {
+public final class ReturnEnumeratorIfNoBlockNode extends RubyContextSourceNode {
 
     private final String methodName;
     @Child private RubyNode method;

src/main/java/org/truffleruby/cext/CExtNodes.java

@@ -145,7 +145,7 @@
 import org.truffleruby.parser.RubySource;
 
 @CoreModule("Truffle::CExt")
-public class CExtNodes {
+public abstract class CExtNodes {
 
     /* These tag values are derived from MRI source and from the Tk gem and are used to represent different control flow
      * states under which code may exit an `rb_protect` block. The fatal tag is defined but I could not find a point