111 lines
4.6 KiB
Java
111 lines
4.6 KiB
Java
/*
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* Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @key headful
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* @bug 6714324
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* @summary tests if removing a Tab from JTabbedComponent, clears the reference
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* to the Page (AccessibleContext) object.
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* @modules java.desktop/java.awt:open
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* @run main TabbedPaneMemLeak
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*/
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import javax.accessibility.Accessible;
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import javax.accessibility.AccessibleContext;
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import javax.swing.JTabbedPane;
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import javax.swing.JComponent;
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import javax.swing.JPanel;
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import javax.swing.JSlider;
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import javax.swing.SwingUtilities;
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import java.awt.Component;
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import java.lang.reflect.Field;
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import java.util.Hashtable;
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public class TabbedPaneMemLeak
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{
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private static void checkAccessibleParent(Component component) {
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//Use reflection to check the value of accessibleContext, since directly calling getAccessibleContext()
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//creates one, if not already present.
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try {
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Field field =
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component.getClass().getSuperclass().getSuperclass().getSuperclass().getSuperclass().getDeclaredField(
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"accessibleContext");
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field.setAccessible(true);
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AccessibleContext ctx = (AccessibleContext)field.get(component);
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if (ctx != null) {
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Field accessibleParentField = field.getType().getDeclaredField("accessibleParent");
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accessibleParentField.setAccessible(true);
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Accessible parent = (Accessible)accessibleParentField.get(ctx);
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if (parent != null) {
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throw new RuntimeException("Test failed: AccessibleContext added on the wrong codepath.");
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}
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}
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} catch (NoSuchFieldException | IllegalAccessException e) {
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throw new RuntimeException("Test failed: Unable to fetch AccessibleContext");
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}
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}
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public static void main(String[] args) throws Exception
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{
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SwingUtilities.invokeAndWait(() -> {
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JTabbedPane tabbedPane = new JTabbedPane();
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if (tabbedPane.getAccessibleContext() != null) { // Ensure that the JTabbedPane has an AccessibleContext
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JComponent component = new JPanel();
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System.out.println(component.getAccessibleContext().getAccessibleParent()); // null
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tabbedPane.addTab("Component", component);
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System.out.println(component.getAccessibleContext().getAccessibleParent()); // JTabbedPane$Page
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JComponent component1 = new JPanel();
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JComponent component2 = new JPanel();
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tabbedPane.addTab("Component1", component1);
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tabbedPane.setComponentAt(1, component2);
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if (component1.getAccessibleContext().getAccessibleParent() != null) {
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throw new RuntimeException("Test failed: Parent AccessibleContext not cleared from the child component");
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}
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tabbedPane.removeAll(); // Could also be tabbedPane.remove(component) or tabbedPane.removeTabAt(0)
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if (component.getAccessibleContext().getAccessibleParent() != null) {
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throw new RuntimeException("Test failed: Parent AccessibleContext not cleared from the child " +
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"component");
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}
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JSlider slider = new JSlider(0, 10);
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Hashtable<Integer, JComponent> labels = slider.createStandardLabels(5, 2);
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JComponent labelComp = labels.get(labels.keys().nextElement());
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tabbedPane.add(labelComp);
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checkAccessibleParent(labelComp);
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tabbedPane.remove(labelComp);
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checkAccessibleParent(labelComp);
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}
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});
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}
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}
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