package ie.dcu.util;

/**
 * Utilities for identifying the operating system.
 * 
 * @author Kevin McGuinness
 */
public class OsUtils {
	private static final String OS_NAME = "os.name";
	
	/**
	 * Returns <code>true</code> if the is Mac OS or Mac OS X.
	 */
	public static boolean isMacOS() {
		String os = System.getProperty("os.name");
		os = os.toLowerCase();
		return os.startsWith("mac os");
	}

	/**
	 * Returns <code>true</code> if the OS is Mac OS X.
	 */
	public static boolean isMacOSX() {
		String os = System.getProperty(OS_NAME);
		os = os.toLowerCase();
		return os.startsWith("mac os x");
	}
	
	/**
	 * Returns <code>true</code> if the OS is an MS Windows variant.
	 */
	public static boolean isWindows() {
		String os = System.getProperty(OS_NAME);
		return os.startsWith("Windows");
	}
	
	/**
	 * Returns <code>true</code> if the OS is a Linux variant.
	 */
	public static boolean isLinux() {
		String os = System.getProperty(OS_NAME);
		return os.startsWith("Linux");
	}
	
	/**
	 * Returns the users home folder.
	 */
	public static String userHome() {
		return System.getProperty("user.home");
	}
	
	/**
	 * Returns true if we are on Linux and on a 64 bit Java VM.
	 * 
	 * Note: this is basically guess-work and depends on the VM vendor.
	 * Should work for Sun Java though.
	 */
	public static boolean isLinux64() {
		return isLinux() && System.getProperty("os.arch").endsWith("64");
	}
}