/*

 * 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.

 */

package jdk.jpackage.internal;

import java.util.regex.Pattern;

/**

 * Platform

 *

 * Use <code>Platform</code> to detect the operating system

 * that is currently running.

 *

 * Example:

 *

 *  Platform platform = Platform.getPlatform();

 *

 *  switch(platform) {

 *    case Platform.MAC: {

 *      // Do something

 *      break;

 *    }

 *    case Platform.WINDOWS:

 *    case Platform.LINUX: {

 *      // Do something else

 *    }

 *  }

 *

 */

enum Platform {UNKNOWN, WINDOWS, LINUX, MAC;

    private static final Platform platform;

    private static final int majorVersion;

    private static final int minorVersion;

    static {

        String os = System.getProperty("os.name").toLowerCase();

        if (os.indexOf("win") >= 0) {

            platform = Platform.WINDOWS;

        }

        else if (os.indexOf("nix") >= 0 || os.indexOf("nux") >= 0) {

            platform = Platform.LINUX;

        }

        else if (os.indexOf("mac") >= 0) {

            platform = Platform.MAC;

        }

        else {

            platform = Platform.UNKNOWN;

        }

        String version = System.getProperty("os.version").toString();

        String[] parts = version.split(Pattern.quote("."));

        if (parts.length > 0) {

            majorVersion = Integer.parseInt(parts[0]);

            if (parts.length > 1) {

                minorVersion = Integer.parseInt(parts[1]);

            }

            else {

                minorVersion = -1;

            }

        }

        else {

            majorVersion = -1;

            minorVersion = -1;

        }

    }

    private Platform() {}

    static Platform getPlatform() {

        return platform;

    }

    static int getMajorVersion() {

        return majorVersion;

    }

    static int getMinorVersion() {

        return minorVersion;

    }

    static boolean isWindows() {

        return getPlatform() == WINDOWS;

    }

    static boolean isMac() {

        return getPlatform() == MAC;

    }

    static boolean isLinux() {

        return getPlatform() == LINUX;

    }

}