diff --git a/lucene/luke/src/java/org/apache/lucene/luke/app/desktop/components/dialog/menubar/OpenIndexDialogFactory.java b/lucene/luke/src/java/org/apache/lucene/luke/app/desktop/components/dialog/menubar/OpenIndexDialogFactory.java
index 9627a158638..a523cd4b111 100644
--- a/lucene/luke/src/java/org/apache/lucene/luke/app/desktop/components/dialog/menubar/OpenIndexDialogFactory.java
+++ b/lucene/luke/src/java/org/apache/lucene/luke/app/desktop/components/dialog/menubar/OpenIndexDialogFactory.java
@@ -55,9 +55,8 @@ import org.apache.lucene.luke.app.desktop.util.FontUtils;
 import org.apache.lucene.luke.app.desktop.util.MessageUtils;
 import org.apache.lucene.luke.app.desktop.util.StyleConstants;
 import org.apache.lucene.luke.models.LukeException;
+import org.apache.lucene.luke.models.util.IndexUtils;
 import org.apache.lucene.luke.util.LoggerFactory;
-import org.apache.lucene.store.MMapDirectory;
-import org.apache.lucene.store.NIOFSDirectory;
 import org.apache.lucene.util.NamedThreadFactory;
 import org.apache.lucene.util.SuppressForbidden;
 
@@ -127,7 +126,7 @@ public final class OpenIndexDialogFactory implements DialogOpener.DialogFactory
         Executors.newFixedThreadPool(1, new NamedThreadFactory("load-directory-types"));
     executorService.execute(
         () -> {
-          for (String clazzName : supportedDirImpls()) {
+          for (String clazzName : IndexUtils.supportedDirectoryImpls()) {
             dirImplCombo.addItem(clazzName);
           }
         });
@@ -254,10 +253,6 @@ public final class OpenIndexDialogFactory implements DialogOpener.DialogFactory
     return panel;
   }
 
-  private String[] supportedDirImpls() {
-    return new String[] {MMapDirectory.class.getName(), NIOFSDirectory.class.getName()};
-  }
-
   private JPanel buttons() {
     JPanel panel = new JPanel(new FlowLayout(FlowLayout.TRAILING));
     panel.setOpaque(false);
diff --git a/lucene/luke/src/java/org/apache/lucene/luke/models/util/IndexUtils.java b/lucene/luke/src/java/org/apache/lucene/luke/models/util/IndexUtils.java
index 5841784521f..27cd107b0f9 100644
--- a/lucene/luke/src/java/org/apache/lucene/luke/models/util/IndexUtils.java
+++ b/lucene/luke/src/java/org/apache/lucene/luke/models/util/IndexUtils.java
@@ -47,6 +47,8 @@ import org.apache.lucene.store.FSDirectory;
 import org.apache.lucene.store.IOContext;
 import org.apache.lucene.store.IndexInput;
 import org.apache.lucene.store.LockFactory;
+import org.apache.lucene.store.MMapDirectory;
+import org.apache.lucene.store.NIOFSDirectory;
 import org.apache.lucene.util.Bits;
 
 /**
@@ -108,6 +110,17 @@ public final class IndexUtils {
     }
   }
 
+  /**
+   * Returns supported {@link Directory} implementations.
+   *
+   * @return class names of supported directory implementation
+   */
+  public static String[] supportedDirectoryImpls() {
+    return new String[] {
+      FSDirectory.class.getName(), MMapDirectory.class.getName(), NIOFSDirectory.class.getName()
+    };
+  }
+
   /**
    * Opens an index directory for given index path.
    *