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OS.java
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OS.java
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// This is an open source non-commercial project. Dear PVS-Studio, please check it.
// PVS-Studio Static Code Analyzer for C, C++, C#, and Java: http://www.viva64.com
//
// Copyright 2019 Alexander Biryukov
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package io.github.sanyarnd.standardpaths;
import java.util.Locale;
import org.checkerframework.checker.nullness.qual.NonNull;
/**
* Operation system enumeration.
*
* @author Alexander Biryukov
*/
enum OS {
/**
* Microsoft Windows operating system.
*/
WINDOWS,
/**
* Linux-based operating system.
*/
LINUX,
/**
* Apple Macintosh operating system.
*/
MAC,
/**
* Other OSes, also if `os.name` is not defined.
*/
UNKNOWN;
private static String name = System.getProperty("os.name").toLowerCase(Locale.ENGLISH);
/**
* Current OS.
*
* @return current OS
*/
@NonNull
public static OS current() {
OS win = name.contains("win") ? WINDOWS : UNKNOWN;
OS nonLinux = name.contains("mac") ? MAC : win;
return name.contains("linux") ? LINUX : nonLinux;
}
public static boolean isWindows() { return OS.current() == OS.WINDOWS; }
public static boolean isLinux() { return OS.current() == OS.LINUX; }
public static boolean isMac() { return OS.current() == OS.MAC; }
public static boolean isUnknown() { return OS.current() == OS.UNKNOWN; }
}