/*

 * Copyright (c) 2015, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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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/*

 * @test

 * @summary NULLCHK is emitted as Object.getClass

 * @compile -source 6 -target 6 TestSyntheticNullChecks.java

 * @run main TestSyntheticNullChecks 6

 * @clean TestSyntheticNullChecks*

 * @compile -source 7 -target 7 TestSyntheticNullChecks.java

 * @run main TestSyntheticNullChecks 7

 * @clean TestSyntheticNullChecks*

 * @compile TestSyntheticNullChecks.java

 * @run main TestSyntheticNullChecks 9

 */

public class TestSyntheticNullChecks {

    class Inner { }

    static void generateSyntheticNPE(TestSyntheticNullChecks outer) {

        outer.new Inner(); //javac will generate a synthetic NPE check for 'outer'

    }

    public static void main(String[] args) {

        int version = Integer.valueOf(args[0]);

        boolean useObjects = version >= 7;

        try {

            generateSyntheticNPE(null);

        } catch (NullPointerException npe) {

            boolean hasRequireNotNull = false;

            for (StackTraceElement e : npe.getStackTrace()) {

                if (e.getClassName().equals("java.util.Objects") &&

                        e.getMethodName().equals("requireNonNull")) {

                    hasRequireNotNull = true;

                    break;

                }

            }

            if (hasRequireNotNull != useObjects) {

                throw new AssertionError();

            }

        }

    }

}