Copiers optimizations

impl/src/main/java/com/sun/faces/util/copier/CloneCopier.java

@@ -43,7 +43,7 @@ public Object copy(Object object) {
 
             Method cloneMethod = getMethod(object, "clone");
 
-            if (!cloneMethod.isAccessible()) {
+            if (!cloneMethod.canAccess(object)) {
                 cloneMethod.setAccessible(true);
             }
 

impl/src/main/java/com/sun/faces/util/copier/CopierUtils.java

@@ -29,21 +29,14 @@ public class CopierUtils {
     private static final String ERROR_COPIER_NAME = "The copier name should be a Java valid simple/qualified name.";
     private static final String COPIER_PREFIX = "com.sun.faces.util.copier.";
 
-    private final static Set<String> keywords;
-
-    static {
-        Set<String> s = new HashSet<>();
-        String[] kws = { "abstract", "continue", "for", "new", "switch", "assert", "default", "if", "package", "synchronized", "boolean", "do", "goto",
-                "private", "this", "break", "double", "implements", "protected", "throw", "byte", "else", "import", "public", "throws", "case", "enum",
-                "instanceof", "return", "transient", "catch", "extends", "int", "short", "try", "char", "final", "interface", "static", "void", "class",
-                "finally", "long", "strictfp", "volatile", "const", "float", "native", "super", "while",
-                // literals
-                "null", "true", "false" };
-        for (String kw : kws) {
-            s.add(kw);
-        }
-        keywords = Collections.unmodifiableSet(s);
-    }
+    private final static Set<String> keywords = Set.of(
+        "abstract", "continue", "for", "new", "switch", "assert", "default", "if", "package", "synchronized", "boolean", "do", "goto",
+        "private", "this", "break", "double", "implements", "protected", "throw", "byte", "else", "import", "public", "throws", "case", "enum",
+        "instanceof", "return", "transient", "catch", "extends", "int", "short", "try", "char", "final", "interface", "static", "void", "class",
+        "finally", "long", "strictfp", "volatile", "const", "float", "native", "super", "while",
+        // literals
+        "null", "true", "false"
+    );
 
     public static Copier getCopier(FacesContext context, String copierType) {
         Copier copier = null;

impl/src/main/java/com/sun/faces/util/copier/CopyCtorCopier.java

@@ -35,7 +35,7 @@ public class CopyCtorCopier implements Copier {
     public Object copy(Object object) {
 
         try {
-            Constructor<? extends Object> copyConstructor = object.getClass().getConstructor(object.getClass());
+            Constructor<?> copyConstructor = object.getClass().getConstructor(object.getClass());
 
             return copyConstructor.newInstance(object);
 

impl/src/main/java/com/sun/faces/util/copier/MultiStrategyCopier.java

@@ -37,7 +37,7 @@
  */
 public class MultiStrategyCopier implements Copier {
 
-    private static final List<Copier> COPIERS = asList( // Note: copier instances used here must be thread-safe!
+    private static final List<Copier> COPIERS = List.of( // Note: copier instances used here must be thread-safe!
             new SerializationCopier(), new CloneCopier(), new CopyCtorCopier(), new NewInstanceCopier());
 
     @Override

impl/src/main/java/com/sun/faces/util/copier/NewInstanceCopier.java

@@ -16,6 +16,8 @@
 
 package com.sun.faces.util.copier;
 
+import java.lang.reflect.InvocationTargetException;
+
 /**
  * Copier that doesn't actually copy an object fully, but just returns a new instance of the same type.
  * <p>
@@ -30,8 +32,8 @@ public class NewInstanceCopier implements Copier {
     @Override
     public Object copy(Object object) {
         try {
-            return object.getClass().newInstance();
-        } catch (InstantiationException | IllegalAccessException e) {
+            return object.getClass().getDeclaredConstructor().newInstance();
+        } catch (InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
             throw new IllegalStateException(e);
         }
     }