/*

 * Copyright (c) 2014, 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 8058243

 * @summary Reduce size of bytecode for large switch statements

 * @library /tools/lib

 * @build ToolBox

 * @run main SwitchMetricTest

 */

import java.net.URL;

import java.util.List;

public class SwitchMetricTest {

    public static void main(String... args) throws Exception {

        new SwitchMetricTest().run();

    }

    // This code should produce a tableswitch

    class Test1 {

        int m(int x) {

            switch (x) {

            case 1:

            case 2:

            case 3:

            case 4:

            case 5: return 1;

            default: return 0;

            }

        }

    }

    // This code should produce a lookupswitch

    class Test2 {

        int m(int x) {

            switch (x) {

            case 1:

            case 2:

            case 3:

            case 4:

            case 50: return 1;

            default: return 0;

            }

        }

    }

    void check(String classfile, String bytecode) throws Exception {

        ToolBox tb = new ToolBox();

        URL url = SwitchMetricTest.class.getResource(classfile);

        List<String> result = tb.new JavapTask()

                .options("-c")

                .classes(url.getFile())

                .run()

                .write(ToolBox.OutputKind.DIRECT)

                .getOutputLines(ToolBox.OutputKind.DIRECT);

        List<String> matches = tb.grep(bytecode, result);

        if (matches.isEmpty())

            throw new Exception(bytecode + " not found");

    }

    void run() throws Exception {

        check("SwitchMetricTest$Test1.class", "tableswitch");

        check("SwitchMetricTest$Test2.class", "lookupswitch");

    }

}