/*

 * Copyright (c) 2018, 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.

 */

/* @test

   @bug 6828982

   @summary Verifies UIDefaults.getUI retains original exception

   @run main TestUIDefaultsErrorHandling

 */

import java.io.ByteArrayOutputStream;

import java.io.PrintStream;

import javax.swing.JComponent;

import javax.swing.JLabel;

import javax.swing.UIDefaults;

import javax.swing.UIManager;

import javax.swing.plaf.ComponentUI;

import javax.swing.plaf.basic.BasicLabelUI;

public class TestUIDefaultsErrorHandling {

    private final static String erroutput = "oops, complex problem with diagnostics";

    public static void main(String[] args) {

        final PrintStream err = System.err;

        ByteArrayOutputStream bytes = new ByteArrayOutputStream();

        System.setErr(new PrintStream(bytes));

        try {

            UIDefaults defaults = UIManager.getDefaults();

            defaults.put("BrokenUI", BrokenUI.class.getName());

            defaults.getUI(new JLabel() {

                public @Override String getUIClassID() {

                    return "BrokenUI";

                }

            });

            if (!(bytes.toString().contains(erroutput))) {

                throw new RuntimeException("UIDefauls swallows exception trace");

            }

        } finally {

            System.setErr(err);

        }

    }

    public static class BrokenUI extends BasicLabelUI {

        public static ComponentUI createUI(JComponent target) {

            return new BrokenUI();

        }

        private BrokenUI() {

            throw new RuntimeException(erroutput);

        }

    }

}