1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import java.lang.reflect.InvocationTargetException; 25 import java.util.ArrayList; 26 import java.util.Arrays; 27 import java.util.List; 28 29 import javax.accessibility.Accessible; 30 import javax.accessibility.AccessibleContext; 31 import javax.swing.AbstractListModel; 32 import javax.swing.JFrame; 33 import javax.swing.JList; 34 import javax.swing.SwingUtilities; 35 import javax.swing.WindowConstants; 36 37 /* @test 38 @bug 8076249 39 @summary NPE in AccessBridge while editing JList model 40 @author Mikhail Cherkasov 41 @run main AccessibleJListChildNPETest 42 */ 43 public class AccessibleJListChildNPETest { 44 45 private static String[] model = { "1", "2", "3", "4", "5", "6" }; 46 private static JList<String> list; 47 48 public static void main(String[] args) throws InvocationTargetException, InterruptedException { 49 SwingUtilities.invokeAndWait(new Runnable() { 50 @Override 51 public void run() { 52 JFrame frame = new JFrame(); 53 frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 54 final MyModel dataModel = new MyModel(Arrays.asList(model)); 55 list = new JList<>(dataModel); 56 frame.getContentPane().add(list); 57 frame.pack(); 58 frame.setVisible(true); 59 60 } 61 }); 62 63 SwingUtilities.invokeAndWait(new Runnable() { 64 @Override 65 public void run() { 66 AccessibleContext ac = list.getAccessibleContext(); 67 MyModel model = (MyModel)list.getModel(); 68 Accessible accessibleChild = ac.getAccessibleChild(model.getSize()-1); 69 model.removeFirst(); 70 accessibleChild.getAccessibleContext().getAccessibleSelection(); 71 accessibleChild.getAccessibleContext().getAccessibleText(); 72 accessibleChild.getAccessibleContext().getAccessibleValue(); 73 } 74 }); 75 } 76 77 protected static class MyModel extends AbstractListModel<String> { 78 private List<String> items = new ArrayList<>(); 79 80 MyModel(final List<String> newItems) { 81 super(); 82 items.addAll(newItems); 83 fireIntervalAdded(this, 0, getSize() - 1); 84 } 85 86 void removeFirst() { 87 if(getSize() > 0) { 88 items.remove(0); 89 fireIntervalRemoved(this, 0, 0); 90 } 91 } 92 93 @Override 94 public int getSize() { 95 return items.size(); 96 } 97 98 @Override 99 public String getElementAt(int index) { 100 return items.get(index); 101 } 102 } 103 }