8296198: JFileChooser throws InternalError java.lang.InternalError with Windows shortcuts

Reviewed-by: serb, abhiscxk

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicFileChooserUI.java

@@ -1408,22 +1408,25 @@ public class BasicFileChooserUI extends FileChooserUI {
     private void changeDirectory(File dir) {
         JFileChooser fc = getFileChooser();
         // Traverse shortcuts on Windows
-        if (dir != null && FilePane.usesShellFolder(fc)) {
+        if (dir != null) {
             try {
-                ShellFolder shellFolder = ShellFolder.getShellFolder(dir);
-
-                if (shellFolder.isLink()) {
-                    File linkedTo = shellFolder.getLinkLocation();
-
-                    // If linkedTo is null we try to use dir
-                    if (linkedTo != null) {
-                        if (fc.isTraversable(linkedTo)) {
-                            dir = linkedTo;
-                        } else {
-                            return;
+                File linkedTo = null;
+                if (FilePane.usesShellFolder(fc)) {
+                    ShellFolder shellFolder = ShellFolder.getShellFolder(dir);
+                    if (shellFolder.isLink()) {
+                        linkedTo = shellFolder.getLinkLocation();
+                        if (linkedTo == null) {
+                            dir = shellFolder;
                         }
+                    }
+                } else if ( fc.getFileSystemView().isLink(dir)){
+                    linkedTo = fc.getFileSystemView().getLinkLocation(dir);
+                }
+                if (linkedTo != null) {
+                    if (fc.isTraversable(linkedTo)) {
+                        dir = linkedTo;
                     } else {
-                        dir = shellFolder;
+                        return;
                     }
                 }
             } catch (FileNotFoundException ex) {

test/jdk/javax/swing/JFileChooser/FileSystemView/CustomFSVLinkTest.java

@@ -0,0 +1,218 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.awt.BorderLayout;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+
+import javax.swing.JFrame;
+import javax.swing.JFileChooser;
+import javax.swing.SwingUtilities;
+import javax.swing.Icon;
+import javax.swing.WindowConstants;
+import javax.swing.filechooser.FileSystemView;
+
+/*
+ * @test
+ * @bug 8296198
+ * @key headful
+ * @requires (os.family == "windows")
+ * @library /java/awt/regtesthelpers
+ * @build PassFailJFrame
+ * @summary Test to check if the Link to a folder is traversable with custom
+ * FileSystemView is valid on ValueChanged property listener.
+ * @run main/manual CustomFSVLinkTest
+ */
+public class CustomFSVLinkTest {
+    static JFrame frame;
+    static JFileChooser jfc;
+
+    static PassFailJFrame passFailJFrame;
+
+    public static void main(String[] args) throws Exception {
+        SwingUtilities.invokeAndWait(new Runnable() {
+            public void run() {
+                try {
+                    initialize();
+                } catch (InterruptedException | InvocationTargetException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+        });
+        passFailJFrame.awaitAndCheck();
+    }
+
+    static void initialize() throws InterruptedException, InvocationTargetException {
+        //Initialize the components
+        final String INSTRUCTIONS = """
+                Instructions to Test:
+                1. Create a link to a any valid folder.
+                2. Navigate to the linked folder through the link created
+                (From FileChooser).
+                3. If "link" can't be traversed or if its absolute path is null
+                   click FAIL. If "link" can be traversed then click PASS.
+                """;
+        frame = new JFrame("JFileChooser Link test");
+        jfc = new JFileChooser(new MyFileSystemView());
+        passFailJFrame = new PassFailJFrame("Test Instructions", INSTRUCTIONS, 5L, 8, 40);
+
+        PassFailJFrame.addTestWindow(frame);
+        PassFailJFrame.positionTestWindow(frame, PassFailJFrame.Position.HORIZONTAL);
+        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        jfc.setDialogType(JFileChooser.CUSTOM_DIALOG);
+
+        frame.add(jfc, BorderLayout.CENTER);
+        frame.pack();
+        frame.setVisible(true);
+    }
+
+    private static class MyFileSystemView extends FileSystemView {
+        FileSystemView delegate;
+
+        MyFileSystemView() {
+            delegate = FileSystemView.getFileSystemView();
+        }
+
+        @Override
+        public File createNewFolder(File containingDir) throws IOException {
+            return delegate.createNewFolder(containingDir);
+        }
+
+        @Override
+        public boolean isRoot(File f) {
+            return delegate.isRoot(f);
+        }
+
+        @Override
+        public Boolean isTraversable(File f) {
+            return delegate.isTraversable(f);
+        }
+
+        @Override
+        public String getSystemDisplayName(File f) {
+            return delegate.getSystemDisplayName(f);
+        }
+
+        @Override
+        public String getSystemTypeDescription(File f) {
+            return delegate.getSystemTypeDescription(f);
+        }
+
+        @Override
+        public Icon getSystemIcon(File f) {
+            return delegate.getSystemIcon(f);
+        }
+
+        @Override
+        public boolean isParent(File folder, File file) {
+            return delegate.isParent(folder, file);
+        }
+
+        @Override
+        public File getChild(File parent, String fileName) {
+            return delegate.getChild(parent, fileName);
+        }
+
+        @Override
+        public boolean isFileSystem(File f) {
+            return delegate.isFileSystem(f);
+        }
+
+        @Override
+        public boolean isHiddenFile(File f) {
+            return delegate.isHiddenFile(f);
+        }
+
+        @Override
+        public boolean isFileSystemRoot(File dir) {
+            return delegate.isFileSystemRoot(dir);
+        }
+
+        @Override
+        public boolean isDrive(File dir) {
+            return delegate.isDrive(dir);
+        }
+
+        @Override
+        public boolean isFloppyDrive(File dir) {
+            return delegate.isFloppyDrive(dir);
+        }
+
+        @Override
+        public boolean isComputerNode(File dir) {
+            return delegate.isComputerNode(dir);
+        }
+
+        @Override
+        public File[] getRoots() {
+            return delegate.getRoots();
+        }
+
+        @Override
+        public File getHomeDirectory() {
+            return delegate.getHomeDirectory();
+        }
+
+        @Override
+        public File getDefaultDirectory() {
+            return delegate.getDefaultDirectory();
+        }
+
+        @Override
+        public File createFileObject(File dir, String filename) {
+            return delegate.createFileObject(dir, filename);
+        }
+
+        @Override
+        public File createFileObject(String path) {
+            return delegate.createFileObject(path);
+        }
+
+        @Override
+        public File[] getFiles(File dir, boolean useFileHiding) {
+            return delegate.getFiles(dir, useFileHiding);
+        }
+
+        @Override
+        public File getParentDirectory(File dir) {
+            return delegate.getParentDirectory(dir);
+        }
+
+        @Override
+        public File[] getChooserComboBoxFiles() {
+            return delegate.getChooserComboBoxFiles();
+        }
+
+        @Override
+        public boolean isLink(File file) {
+            return delegate.isLink(file);
+        }
+
+        @Override
+        public File getLinkLocation(File file) throws FileNotFoundException {
+            return delegate.getLinkLocation(file);
+        }
+    }
+}