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/*
 * Stage - Spatial Toolbox And Geoscript Environment 
 * (C) HydroloGIS - www.hydrologis.com 
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * (http://www.eclipse.org/legal/epl-v10.html).
 */
package org.hortonmachine.gears.utils;

import java.util.Locale;

/**
 * helper class to check the operating system this Java VM runs in
 *
 * please keep the notes below as a pseudo-license
 *
 * http://stackoverflow.com/questions/228477/how-do-i-programmatically-determine-operating-system-in-java
 * compare to http://svn.terracotta.org/svn/tc/dso/tags/2.6.4/code/base/common/src/com/tc/util/runtime/Os.java
 * http://www.docjar.com/html/api/org/apache/commons/lang/SystemUtils.java.html
 */
public final class OsCheck {
	/**
	 * types of Operating Systems
	 */
	public enum OSType {
		Windows, MacOS, Linux, Other
	};

	// cached result of OS detection
	protected static OSType detectedOS;

	/**
	 * detect the operating system from the os.name System property and cache
	 * the result
	 * 
	 * @returns - the operating system detected
	 */
	public static OSType getOperatingSystemType() {
		if (detectedOS == null) {
			String OS = System.getProperty("os.name", "generic").toLowerCase(
					Locale.ENGLISH);
			if ((OS.indexOf("mac") >= 0) || (OS.indexOf("darwin") >= 0)) {
				detectedOS = OSType.MacOS;
			} else if (OS.indexOf("win") >= 0) {
				detectedOS = OSType.Windows;
			} else if (OS.indexOf("nux") >= 0) {
				detectedOS = OSType.Linux;
			} else {
				detectedOS = OSType.Other;
			}
		}
		return detectedOS;
	}
}