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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

*

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* 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.

*

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import java.lang.reflect.InvocationTargetException;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import javax.accessibility.Accessible;

import javax.accessibility.AccessibleContext;

import javax.swing.AbstractListModel;

import javax.swing.JFrame;

import javax.swing.JList;

import javax.swing.SwingUtilities;

import javax.swing.WindowConstants;

/* @test

   @bug 8076249

   @summary  NPE in AccessBridge while editing JList model

   @author Mikhail Cherkasov

   @run main AccessibleJListChildNPETest

*/

public class AccessibleJListChildNPETest {

    private static String[] model = { "1", "2", "3", "4", "5", "6" };

    private static JList<String> list;

    public static void main(String[] args) throws InvocationTargetException, InterruptedException {

        SwingUtilities.invokeAndWait(new Runnable() {

            @Override

            public void run() {

                JFrame frame = new JFrame();

                frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

                final MyModel dataModel = new MyModel(Arrays.asList(model));

                list = new JList<>(dataModel);

                frame.getContentPane().add(list);

                frame.pack();

                frame.setVisible(true);

            }

        });

        SwingUtilities.invokeAndWait(new Runnable() {

            @Override

            public void run() {

                AccessibleContext ac = list.getAccessibleContext();

                MyModel model = (MyModel)list.getModel();

                Accessible accessibleChild = ac.getAccessibleChild(model.getSize()-1);

                model.removeFirst();

                accessibleChild.getAccessibleContext().getAccessibleSelection();

                accessibleChild.getAccessibleContext().getAccessibleText();

                accessibleChild.getAccessibleContext().getAccessibleValue();

            }

        });

    }

    protected static class MyModel extends AbstractListModel<String> {

        private List<String> items = new ArrayList<>();

        MyModel(final List<String> newItems) {

            super();

            items.addAll(newItems);

            fireIntervalAdded(this, 0, getSize() - 1);

        }

        void removeFirst() {

            if(getSize() > 0) {

                items.remove(0);

                fireIntervalRemoved(this, 0, 0);

            }

        }

        @Override

        public int getSize() {

            return items.size();

        }

        @Override

        public String getElementAt(int index) {

            return items.get(index);

        }

    }

}