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/*
* 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.awt.Component;
import java.awt.Container;
import java.awt.Robot;
import java.io.File;
import java.util.function.Predicate;
import javax.swing.JComboBox;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.WindowConstants;
import javax.swing.filechooser.FileView;
import javax.swing.plaf.metal.MetalLookAndFeel;
/*
* @test
* @bug 6616245
* @key headful
* @summary Test to check if NPE occurs when using custom FileView.
* @run main FileViewNPETest
*/
public class FileViewNPETest {
private static JFrame frame;
private static JFileChooser jfc;
private static File path;
public static void main(String[] args) throws Exception {
final Robot robot = new Robot();
try {
SwingUtilities.invokeAndWait(FileViewNPETest::initialize);
robot.waitForIdle();
SwingUtilities.invokeAndWait(() -> {
jfc.setCurrentDirectory(path.getParentFile());
if (null != jfc.getCurrentDirectory()) {
// The current directory to become null because
// the parent directory is not traversable
throw new RuntimeException("Current directory is not null");
}
});
robot.waitForIdle();
SwingUtilities.invokeAndWait(() -> {
JComboBox<?> dirs = findDirectoryComboBox(jfc);
// No NPE is expected
dirs.setSelectedIndex(dirs.getSelectedIndex());
if (!jfc.getCurrentDirectory().equals(path)) {
throw new RuntimeException("The current directory is not restored");
}
});
} finally {
SwingUtilities.invokeAndWait(() -> {
if (frame != null) {
frame.dispose();
}
});
}
}
private static void initialize() {
try {
UIManager.setLookAndFeel(new MetalLookAndFeel());
} catch (UnsupportedLookAndFeelException e) {
throw new RuntimeException(e);
}
String userHome = System.getProperty("user.home");
String docs = userHome + File.separator + "Documents";
path = new File((new File(docs).exists()) ? docs : userHome);
jfc = new JFileChooser();
jfc.setCurrentDirectory(path);
jfc.setFileView(new CustomFileView(path.getPath()));
jfc.setControlButtonsAreShown(false);
frame = new JFrame("JFileChooser FileView NPE test");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.add(jfc, BorderLayout.CENTER);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static JComboBox<?> findDirectoryComboBox(final Container container) {
Component result = findComponent(container,
c -> c instanceof JComboBox<?>);
return (JComboBox<?>) result;
}
private static Component findComponent(final Container container,
final Predicate<Component> predicate) {
for (Component child : container.getComponents()) {
if (predicate.test(child)) {
return child;
}
if (child instanceof Container cont && cont.getComponentCount() > 0) {
Component result = findComponent(cont, predicate);
if (result != null) {
return result;
}
}
}
return null;
}
}
class CustomFileView extends FileView {
private final String basePath;
public CustomFileView(String path) {
basePath = path;
}
@Override
public Boolean isTraversable(File filePath) {
return ((filePath != null) && (filePath.isDirectory()))
&& filePath.getAbsolutePath().startsWith(basePath);
}
}
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