"final" on effective final fields

impl/src/main/java/com/sun/faces/application/ApplicationAssociate.java

@@ -119,14 +119,14 @@ public class ApplicationAssociate {
 
     private final static String FacesComponentJcpNamespace = "http://xmlns.jcp.org/jsf/component";
 
-    private ApplicationImpl applicationImpl;
+    private final ApplicationImpl applicationImpl;
 
     /**
      * Overall Map containing <code>from-view-id</code> key and <code>Set</code> of <code>NavigationCase</code> objects for
      * that key; The <code>from-view-id</code> strings in this map will be stored as specified in the configuration file -
      * some of them will have a trailing asterisk "*" signifying wild card, and some may be specified as an asterisk "*".
      */
-    private Map<String, Set<NavigationCase>> navigationMap;
+    private final Map<String, Set<NavigationCase>> navigationMap;
 
     /*
      * The FacesComponentTagLibrary uses the information in this map to help it fabricate tag handlers for components
@@ -139,43 +139,38 @@ public class ApplicationAssociate {
 
     private static final String ASSOCIATE_KEY = RIConstants.FACES_PREFIX + "ApplicationAssociate";
 
-    private static ThreadLocal<ApplicationAssociate> instance = new ThreadLocal<>() {
-        @Override
-        protected ApplicationAssociate initialValue() {
-            return null;
-        }
-    };
+    private static final ThreadLocal<ApplicationAssociate> instance = ThreadLocal.withInitial(() -> null);
 
     private List<ELResolver> elResolversFromFacesConfig;
     private ExpressionFactory expressionFactory;
 
-    private InjectionProvider injectionProvider;
+    private final InjectionProvider injectionProvider;
     private ResourceCache resourceCache;
 
     private String contextName;
     private boolean requestServiced;
     private boolean errorPagePresent;
 
-    private AnnotationManager annotationManager;
-    private boolean devModeEnabled;
+    private final AnnotationManager annotationManager;
+    private final boolean devModeEnabled;
     private Compiler compiler;
     private DefaultFaceletFactory faceletFactory;
     private ResourceManager resourceManager;
-    private ApplicationStateInfo applicationStateInfo;
+    private final ApplicationStateInfo applicationStateInfo;
 
-    private PropertyEditorHelper propertyEditorHelper;
+    private final PropertyEditorHelper propertyEditorHelper;
 
-    private NamedEventManager namedEventManager;
+    private final NamedEventManager namedEventManager;
 
-    private WebConfiguration webConfig;
+    private final WebConfiguration webConfig;
 
     private FlowHandler flowHandler;
 
     private SearchExpressionHandler searchExpressionHandler;
 
-    private Map<String, String> definingDocumentIdsToTruncatedJarUrls;
+    private final Map<String, String> definingDocumentIdsToTruncatedJarUrls;
 
-    private long timeOfInstantiation;
+    private final long timeOfInstantiation;
 
     private Map<String, List<String>> resourceLibraryContracts;
 

impl/src/main/java/com/sun/faces/application/ApplicationStateInfo.java

@@ -32,7 +32,7 @@
  */
 public class ApplicationStateInfo {
 
-    private boolean partialStateSaving;
+    private final boolean partialStateSaving;
     private Set<String> fullStateViewIds;
 
     // ------------------------------------------------------------ Constructors

impl/src/main/java/com/sun/faces/application/ByteArrayWebOutputStream.java

@@ -45,7 +45,7 @@ class ByteArrayWebOutputStream extends ServletOutputStream {
     // Log instance for this class
     private static final Logger LOGGER = FacesLogger.APPLICATION.getLogger();
 
-    private DirectByteArrayOutputStream baos;
+    private final DirectByteArrayOutputStream baos;
     private boolean committed;
 
     public ByteArrayWebOutputStream() {

impl/src/main/java/com/sun/faces/application/ConverterPropertyEditorFactory.java

@@ -25,6 +25,7 @@
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
 import java.lang.ref.WeakReference;
+import java.nio.charset.StandardCharsets;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
 import java.util.HashMap;
@@ -118,7 +119,7 @@ public int compareTo(Utf8InfoReplacement rhs) {
 
         // The source template class on which to base the definition of the new
         // PropertyEditor classes.
-        private Class<? extends ConverterPropertyEditorBase> templateClass;
+        private final Class<? extends ConverterPropertyEditorBase> templateClass;
         // The bytes that define the source template class.
         private byte[] templateBytes;
         // The constant_pool_count from the template class bytecodes.
@@ -341,7 +342,7 @@ private byte[] replaceInTemplate(Utf8InfoReplacement... replacements) {
          */
         public byte[] generateClassBytesFor(String newClassName, String targetClassName) {
             return replaceInTemplate(new Utf8InfoReplacement(classNameConstant, newClassName),
-                    new Utf8InfoReplacement(classNameRefConstant, new StringBuilder(32).append('L').append(newClassName).append(';').toString()),
+                    new Utf8InfoReplacement(classNameRefConstant, 'L' + newClassName + ';'),
                     new Utf8InfoReplacement(targetClassConstant, targetClassName));
         }
     }
@@ -361,9 +362,9 @@ public byte[] generateClassBytesFor(String newClassName, String targetClassName)
      */
     private class DisposableClassLoader extends ClassLoader {
         // The class loader which loaded the target class.
-        private ClassLoader targetLoader;
+        private final ClassLoader targetLoader;
         // The class loader which loaded the base class
-        private ClassLoader myLoader;
+        private final ClassLoader myLoader;
 
         public DisposableClassLoader(ClassLoader targetLoader) {
             super(targetLoader);
@@ -439,7 +440,7 @@ protected Class<?> findClass(String className) throws ClassNotFoundException {
     private static final Pattern MultipleUnderscorePattern = Pattern.compile("_(_+)");
     private static ConverterPropertyEditorFactory defaultInstance;
     // Template information extracted from the source template class.
-    private ClassTemplateInfo templateInfo;
+    private final ClassTemplateInfo templateInfo;
     // Cache of DisposableClassLoaders keyed on the class loader of the target.
     private Map<ClassLoader, WeakReference<DisposableClassLoader>> classLoaderCache;
 
@@ -543,14 +544,7 @@ private static String getVMClassName(Class<?> c) {
      */
     private static byte[] getUtf8InfoBytes(String text) {
         byte[] utf8;
-        try {
-            utf8 = text.getBytes("UTF-8");
-        } catch (UnsupportedEncodingException e) {
-            // The DM_DEFAULT_ENCODING warning is acceptable here
-            // because we explicitly *want* to use the Java runtime's
-            // default encoding.
-            utf8 = text.getBytes();
-        }
+        utf8 = text.getBytes(StandardCharsets.UTF_8);
         byte[] info = new byte[utf8.length + 3];
         info[0] = 1;
         info[1] = (byte) (utf8.length >> 8 & 0xff);

impl/src/main/java/com/sun/faces/application/NamedEventManager.java

@@ -38,8 +38,8 @@
  */
 public class NamedEventManager {
 
-    private Map<String, Class<? extends SystemEvent>> namedEvents = new ConcurrentHashMap<>();
-    private Map<String, Set<Class<? extends SystemEvent>>> duplicateNames = new ConcurrentHashMap<>();
+    private final Map<String, Class<? extends SystemEvent>> namedEvents = new ConcurrentHashMap<>();
+    private final Map<String, Set<Class<? extends SystemEvent>>> duplicateNames = new ConcurrentHashMap<>();
 
     public NamedEventManager() {
         namedEvents.put("jakarta.faces.event.PreRenderComponent", PreRenderComponentEvent.class);
@@ -81,12 +81,8 @@ public Class<? extends SystemEvent> getNamedEvent(String name) {
 
     public void addDuplicateName(String name, Class<? extends SystemEvent> event) {
         Class<? extends SystemEvent> registeredEvent = namedEvents.remove(name);
-        Set<Class<? extends SystemEvent>> events = duplicateNames.get(name);
+        Set<Class<? extends SystemEvent>> events = duplicateNames.computeIfAbsent(name, k -> new HashSet<>());
 
-        if (events == null) {
-            events = new HashSet<>();
-            duplicateNames.put(name, events);
-        }
         events.add(event);
 
         if (registeredEvent != null) {

impl/src/main/java/com/sun/faces/application/WebPrintWriter.java

@@ -55,7 +55,7 @@ public NoOpWriter() {
         }
 
         @Override
-        public void write(char cbuf[], int off, int len) throws IOException {
+        public void write(char[] cbuf, int off, int len) throws IOException {
             // no-op
         }
 
@@ -75,7 +75,7 @@ public void write(int c) throws IOException {
         }
 
         @Override
-        public void write(char cbuf[]) throws IOException {
+        public void write(char[] cbuf) throws IOException {
             // no-op
         }
 

impl/src/main/java/com/sun/faces/application/WebappLifecycleListener.java

@@ -56,7 +56,7 @@ public class WebappLifecycleListener {
 
     private ServletContext servletContext;
     private ApplicationAssociate applicationAssociate;
-    private Set<HttpSession> activeSessions = ConcurrentHashMap.newKeySet();
+    private final Set<HttpSession> activeSessions = ConcurrentHashMap.newKeySet();
 
 
     // ------------------------------------------------------------ Constructors

impl/src/main/java/com/sun/faces/application/annotation/AnnotationManager.java

@@ -102,7 +102,7 @@ private enum ProcessingTarget {
         Renderer(RENDERER_SCANNERS),
         SystemEvent(EVENTS_SCANNERS);
 
-        private Scanner[] scanners;
+        private final Scanner[] scanners;
 
         ProcessingTarget(Scanner[] scanners) {
             this.scanners = scanners;
@@ -113,7 +113,7 @@ private enum ProcessingTarget {
     /**
      * The backing cache for all annotation metadata.
      */
-    private ConcurrentMap<Class<?>, Future<Map<Class<? extends Annotation>, RuntimeAnnotationHandler>>> cache;
+    private final ConcurrentMap<Class<?>, Future<Map<Class<? extends Annotation>, RuntimeAnnotationHandler>>> cache;
 
     // ------------------------------------------------------------ Constructors
 
@@ -317,8 +317,8 @@ private static final class ProcessAnnotationsTask implements Callable<Map<Class<
 
         @SuppressWarnings({ "unchecked" })
         private static final Map<Class<? extends Annotation>, RuntimeAnnotationHandler> EMPTY = Collections.EMPTY_MAP;
-        private Class<?> clazz;
-        private Scanner[] scanners;
+        private final Class<?> clazz;
+        private final Scanner[] scanners;
 
         // -------------------------------------------------------- Constructors
 

impl/src/main/java/com/sun/faces/application/annotation/EJBHandler.java

@@ -28,10 +28,10 @@
 class EJBHandler extends JndiHandler implements RuntimeAnnotationHandler {
 
     private static final String JAVA_MODULE = "java:module/";
-    private Field[] fields;
-    private EJB[] fieldAnnotations;
-    private Method[] methods;
-    private EJB[] methodAnnotations;
+    private final Field[] fields;
+    private final EJB[] fieldAnnotations;
+    private final Method[] methods;
+    private final EJB[] methodAnnotations;
 
     public EJBHandler(Field[] fields, EJB[] fieldAnnotations, Method[] methods, EJB[] methodAnnotations) {
         this.fields = fields;

impl/src/main/java/com/sun/faces/application/annotation/FacesComponentUsage.java

@@ -19,8 +19,8 @@
 import jakarta.faces.component.FacesComponent;
 
 public class FacesComponentUsage {
-    private Class<?> target;
-    private FacesComponent annotation;
+    private final Class<?> target;
+    private final FacesComponent annotation;
 
     public FacesComponentUsage(Class<?> target, FacesComponent annotation) {
         this.target = target;

impl/src/main/java/com/sun/faces/application/annotation/ListenerForHandler.java

@@ -28,7 +28,7 @@
  */
 class ListenerForHandler implements RuntimeAnnotationHandler {
 
-    private ListenerFor[] listenersFor;
+    private final ListenerFor[] listenersFor;
 
     // ------------------------------------------------------------ Constructors
 
@@ -57,18 +57,18 @@ public void apply(FacesContext ctx, Object... params) {
         }
 
         if (listener instanceof ComponentSystemEventListener) {
-            for (int i = 0, len = listenersFor.length; i < len; i++) {
-                target.subscribeToEvent(listenersFor[i].systemEventClass(), (ComponentSystemEventListener) listener);
+            for (ListenerFor listenerFor : listenersFor) {
+                target.subscribeToEvent(listenerFor.systemEventClass(), (ComponentSystemEventListener) listener);
             }
         } else if (listener instanceof SystemEventListener) {
             Class<?> sourceClassValue = null;
             Application app = ctx.getApplication();
-            for (int i = 0, len = listenersFor.length; i < len; i++) {
-                sourceClassValue = listenersFor[i].sourceClass();
+            for (ListenerFor listenerFor : listenersFor) {
+                sourceClassValue = listenerFor.sourceClass();
                 if (sourceClassValue == Void.class) {
-                    app.subscribeToEvent(listenersFor[i].systemEventClass(), (SystemEventListener) listener);
+                    app.subscribeToEvent(listenerFor.systemEventClass(), (SystemEventListener) listener);
                 } else {
-                    app.subscribeToEvent(listenersFor[i].systemEventClass(), listenersFor[i].sourceClass(), (SystemEventListener) listener);
+                    app.subscribeToEvent(listenerFor.systemEventClass(), listenerFor.sourceClass(), (SystemEventListener) listener);
 
                 }
             }

impl/src/main/java/com/sun/faces/application/annotation/PersistenceContextHandler.java

@@ -27,10 +27,10 @@
  */
 class PersistenceContextHandler extends JndiHandler implements RuntimeAnnotationHandler {
 
-    private Method[] methods;
-    private PersistenceContext[] methodAnnotations;
-    private Field[] fields;
-    private PersistenceContext[] fieldAnnotations;
+    private final Method[] methods;
+    private final PersistenceContext[] methodAnnotations;
+    private final Field[] fields;
+    private final PersistenceContext[] fieldAnnotations;
 
     public PersistenceContextHandler(Method[] methods, PersistenceContext[] methodAnnotations, Field[] fields, PersistenceContext[] fieldAnnotations) {
         this.methods = methods;

impl/src/main/java/com/sun/faces/application/annotation/PersistenceUnitHandler.java

@@ -27,10 +27,10 @@
  */
 class PersistenceUnitHandler extends JndiHandler implements RuntimeAnnotationHandler {
 
-    private Method[] methods;
-    private PersistenceUnit[] methodAnnotations;
-    private Field[] fields;
-    private PersistenceUnit[] fieldAnnotations;
+    private final Method[] methods;
+    private final PersistenceUnit[] methodAnnotations;
+    private final Field[] fields;
+    private final PersistenceUnit[] fieldAnnotations;
 
     public PersistenceUnitHandler(Method[] methods, PersistenceUnit[] methodAnnotations, Field[] fields, PersistenceUnit[] fieldAnnotations) {
         this.methods = methods;

impl/src/main/java/com/sun/faces/application/annotation/ResourceDependencyHandler.java

@@ -35,8 +35,8 @@
  */
 class ResourceDependencyHandler implements RuntimeAnnotationHandler {
 
-    private ResourceDependency[] dependencies;
-    private Map<ResourceDependency, Expressions> expressionsMap;
+    private final ResourceDependency[] dependencies;
+    private final Map<ResourceDependency, Expressions> expressionsMap;
 
     // ------------------------------------------------------------ Constructors
 

impl/src/main/java/com/sun/faces/application/annotation/ResourceHandler.java

@@ -27,10 +27,10 @@
  */
 class ResourceHandler extends JndiHandler {
 
-    private Field[] fields;
-    private Resource[] fieldAnnotations;
-    private Method[] methods;
-    private Resource[] methodAnnotations;
+    private final Field[] fields;
+    private final Resource[] fieldAnnotations;
+    private final Method[] methods;
+    private final Resource[] methodAnnotations;
 
     public ResourceHandler(Field[] fields, Resource[] fieldAnnotations, Method[] methods, Resource[] methodAnnotations) {
         this.fields = fields;

impl/src/main/java/com/sun/faces/application/annotation/WebServiceRefHandler.java

@@ -27,10 +27,10 @@
  */
 class WebServiceRefHandler extends JndiHandler implements RuntimeAnnotationHandler {
 
-    private Field[] fields;
-    private WebServiceRef[] fieldAnnotations;
-    private Method[] methods;
-    private WebServiceRef[] methodAnnotations;
+    private final Field[] fields;
+    private final WebServiceRef[] fieldAnnotations;
+    private final Method[] methods;
+    private final WebServiceRef[] methodAnnotations;
 
     public WebServiceRefHandler(Field[] fields, WebServiceRef[] fieldAnnotations, Method[] methods, WebServiceRef[] methodAnnotations) {
         this.fields = fields;

impl/src/main/java/com/sun/faces/application/applicationimpl/Events.java

@@ -63,7 +63,7 @@ public class Events {
      * on a per-FacesContext, per-SystemEvent.class type basis.
      */
 
-    private ReentrantLisneterInvocationGuard listenerInvocationGuard = new ReentrantLisneterInvocationGuard();
+    private final ReentrantLisneterInvocationGuard listenerInvocationGuard = new ReentrantLisneterInvocationGuard();
 
     /*
      * @see jakarta.faces.application.Application#publishEvent(FacesContext, Class, Class, Object)
@@ -259,7 +259,7 @@ private SystemEvent processListenersAccountingForAdds(List<SystemEventListener>
             // if original differs from copy, make a new copy.
             // The new copy consists of the original list - processed
 
-            SystemEventListener listenersCopy[] = new SystemEventListener[listeners.size()];
+            SystemEventListener[] listenersCopy = new SystemEventListener[listeners.size()];
             int i = 0;
             for (i = 0; i < listenersCopy.length; i++) {
                 listenersCopy[i] = listeners.get(i);
@@ -298,7 +298,7 @@ private SystemEvent processListenersAccountingForAdds(List<SystemEventListener>
 
     }
 
-    private boolean originalDiffersFromCopy(Collection<SystemEventListener> original, SystemEventListener copy[]) {
+    private boolean originalDiffersFromCopy(Collection<SystemEventListener> original, SystemEventListener[] copy) {
         boolean foundDifference = false;
         int i = 0, originalLen = original.size(), copyLen = copy.length;