Support Gradle 8.x on Java 23+ (#6725)

Author: timtebeek

rewrite-java-21/src/main/java/org/openrewrite/java/isolated/ReloadableJava21ParserVisitor.java

@@ -48,6 +48,8 @@
 import javax.lang.model.element.Modifier;
 import javax.lang.model.element.Name;
 import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.nio.charset.Charset;
 import java.nio.file.Path;
 import java.util.*;
@@ -1850,8 +1852,14 @@ public J visitWildcard(WildcardTree node, Space fmt) {
             // The spacing of initialized enums such as `ONE   (1)` is handled in the `visitNewClass` method, so set it explicitly to “” here.
             String prefix = isEnum(t) ? "" : source.substring(cursor, indexOfNextNonWhitespace(cursor, source));
             cursor += prefix.length();
-            @SuppressWarnings("unchecked") J2 j = (J2) scan(t, formatWithCommentTree(prefix, (JCTree) t, docCommentTable.getCommentTree((JCTree) t)));
+            // Java 21 and 23 have a different return type from getCommentTree; with reflection we can support both
+            Method getCommentTreeMethod = DocCommentTable.class.getMethod("getCommentTree", JCTree.class);
+            DocCommentTree commentTree = (DocCommentTree) getCommentTreeMethod.invoke(docCommentTable, t);
+            @SuppressWarnings("unchecked") J2 j = (J2) scan(t, formatWithCommentTree(prefix, (JCTree) t, commentTree));
             return j;
+        } catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException ex) {
+            reportJavaParsingException(ex);
+            throw new IllegalStateException("Failed to invoke getCommentTree method", ex);
         } catch (Throwable ex) {
             reportJavaParsingException(ex);
             throw ex;