Add generics to _ArrayIterator and _ArrayEnumeration

freemarker-core/src/main/java/freemarker/core/TemplateElement.java

@@ -220,8 +220,8 @@ public int getChildCount() {
      */
     public Enumeration children() {
         return childBuffer != null
-                ? new _ArrayEnumeration(childBuffer, childCount)
-                : Collections.enumeration(Collections.EMPTY_LIST);
+                ? new _ArrayEnumeration<>(childBuffer, childCount)
+                : Collections.emptyEnumeration();
     }
 
     /**

freemarker-core/src/main/java/freemarker/core/_ArrayEnumeration.java

@@ -23,13 +23,13 @@
 import java.util.NoSuchElementException;
 
 /** Don't use this; used internally by FreeMarker, might change without notice. */
-public class _ArrayEnumeration implements Enumeration {
+public class _ArrayEnumeration<E> implements Enumeration<E> {
 
-    private final Object[] array;
+    private final E[] array;
     private final int size;
     private int nextIndex;
 
-    public _ArrayEnumeration(Object[] array, int size) {
+    public _ArrayEnumeration(E[] array, int size) {
         this.array = array;
         this.size = size;
         this.nextIndex = 0;
@@ -41,7 +41,7 @@ public boolean hasMoreElements() {
     }
 
     @Override
-    public Object nextElement() {
+    public E nextElement() {
         if (nextIndex >= size) {
             throw new NoSuchElementException();
         }

freemarker-core/src/main/java/freemarker/core/_ArrayIterator.java

@@ -23,12 +23,12 @@
 import java.util.NoSuchElementException;
 
 /** Don't use this; used internally by FreeMarker, might change without notice. */
-public class _ArrayIterator implements Iterator {
+public class _ArrayIterator<E> implements Iterator<E> {
 
-    private final Object[] array;
+    private final E[] array;
     private int nextIndex;
 
-    public _ArrayIterator(Object[] array) {
+    public _ArrayIterator(E[] array) {
         this.array = array;
         this.nextIndex = 0;
     }
@@ -39,7 +39,7 @@ public boolean hasNext() {
     }
 
     @Override
-    public Object next() {
+    public E next() {
         if (nextIndex >= array.length) {
             throw new NoSuchElementException();
         }

freemarker-core/src/main/java/freemarker/core/_SortedArraySet.java

@@ -44,7 +44,7 @@ public boolean contains(Object o) {
 
     @Override
     public Iterator<E> iterator() {
-        return new _ArrayIterator(array);
+        return new _ArrayIterator<>(array);
     }
 
     @Override