OperatingSystem.java

package net.minecraft.launcher;

import java.io.File;
import java.lang.reflect.Method;
import java.net.URI;

public enum OperatingSystem
{
  LINUX("linux", new String[] { "linux", "unix" }), 
  WINDOWS("windows", new String[] { "win" }), 
  OSX("osx", new String[] { "mac" }), 
  UNKNOWN("unknown", new String[0]);

  private final String name;
  private final String[] aliases;

  private OperatingSystem(String name, String[] aliases) { this.name = name;
    this.aliases = (aliases == null ? new String[0] : aliases); }

  public String getName()
  {
    return this.name;
  }

  public String[] getAliases() {
    return this.aliases;
  }

  public boolean isSupported() {
    return this != UNKNOWN;
  }

  public String getJavaDir() {
    String separator = System.getProperty("file.separator");
    String path = System.getProperty("java.home") + separator + "bin" + separator;

    if ((getCurrentPlatform() == WINDOWS) && 
      (new File(path + "javaw.exe").isFile())) {
      return path + "javaw.exe";
    }

    return path + "java";
  }

  public static OperatingSystem getCurrentPlatform() {
    String osName = System.getProperty("os.name").toLowerCase();

    for (OperatingSystem os : values()) {
      for (String alias : os.getAliases()) {
        if (osName.contains(alias)) return os;
      }
    }

    return UNKNOWN;
  }

  public static void openLink(URI link) {
    try {
      Class desktopClass = Class.forName("java.awt.Desktop");
      Object o = desktopClass.getMethod("getDesktop", new Class[0]).invoke(null, new Object[0]);
      desktopClass.getMethod("browse", new Class[] { URI.class }).invoke(o, new Object[] { link });
    } catch (Throwable e) {
      Launcher.getInstance().println("Failed to open link " + link.toString(), e);
    }
  }
}