/*

 * Copyright (c) 2016, 2019, 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.

 *

 * 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.

 */

/**

 * This application is meant to be run to create a classlist file representing

 * common use.

 *

 * The classlist is produced by adding -XX:DumpLoadedClassList=classlist

 */

package build.tools.classlist;

import java.net.InetAddress;

import java.nio.file.FileSystems;

import java.time.LocalDateTime;

import java.time.ZoneId;

import java.time.format.DateTimeFormatter;

import java.util.stream.Stream;

import java.util.logging.*;

import java.util.Arrays;

import java.util.Date;

import java.util.List;

import java.util.Locale;

import java.text.DateFormat;

import static java.util.stream.Collectors.*;

/**

 * This class is used to generate a classlist during build. Intent

 * is to touch a reasonable amount of JDK classes that are commonly

 * loaded and used early.

 */

public class HelloClasslist {

    private static final Logger LOGGER = Logger.getLogger("Hello");

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

        FileSystems.getDefault();

        List<String> strings = Arrays.asList("Hello", "World!", "From: ",

              InetAddress.getLoopbackAddress().toString());

        String helloWorld = strings.parallelStream()

              .map(s -> s.toLowerCase(Locale.ROOT))

              .collect(joining(","));

        Stream.of(helloWorld.split(","))

              .forEach(System.out::println);

        // Common concatenation patterns

        String SS     = String.valueOf(args.length) + String.valueOf(args.length);

        String CS     = "string" + String.valueOf(args.length);

        String SC     = String.valueOf(args.length) + "string";

        String SCS    = String.valueOf(args.length) + "string" + String.valueOf(args.length);

        String CSS    = "string" + String.valueOf(args.length) + String.valueOf(args.length);

        String CSC    = "string" + String.valueOf(args.length) + "string";

        String SSC    = String.valueOf(args.length) + String.valueOf(args.length) + "string";

        String CSCS   = "string" + String.valueOf(args.length) + "string" + String.valueOf(args.length);

        String SCSC   = String.valueOf(args.length) + "string" + String.valueOf(args.length) + "string";

        String CSCSC  = "string" + String.valueOf(args.length) + "string" + String.valueOf(args.length) + "string";

        String SCSCS  = String.valueOf(args.length) + "string" + String.valueOf(args.length) + "string" + String.valueOf(args.length);

        String CI     = "string" + args.length;

        String IC     = args.length + "string";

        String CIC    = "string" + args.length + "string";

        String CICI   = "string" + args.length + "string" + args.length;

        String CJ     = "string" + System.currentTimeMillis();

        String JC     = System.currentTimeMillis() + "string";

        String CD     = "string" + (args.length/2.0);

        String CJC    = "string" + System.currentTimeMillis() + "string";

        String CJCJ   = "string" + System.currentTimeMillis() + "string" + System.currentTimeMillis();

        String CJCJC  = "string" + System.currentTimeMillis() + "string" + System.currentTimeMillis() + "string";

        String newDate = DateTimeFormatter.ISO_LOCAL_DATE_TIME.format(

                LocalDateTime.now(ZoneId.of("GMT")));

        String oldDate = String.format("%s%n",

                DateFormat.getDateInstance(DateFormat.DEFAULT, Locale.ROOT)

                        .format(new Date()));

        LOGGER.log(Level.INFO, "New Date: " + newDate + " - old: " + oldDate);

    }

}