Class SysEnv

java.lang.Object
com.sun.javatest.util.SysEnv
public class SysEnv extends Object
A class to provide access to OS environment variables, by means of an external command which is executed.

The command will be executed when the first access is made to the environment variables. The command name is determined as follows:

  • The value passed to setCommand, if that has been set
  • The value of the system property "javatest.sysEnv.command", if that has been set
  • An OS-specific default, if one is known. The current set of defaults is as follows:
    The current set of defaults
    OS Default
    Mac OS X /usr/bin/env
    Solaris /usr/bin/env
    Windows XP cmd /c set
  • Finally, a simple default of "env" is used. While this may not always work by default, a user could provide a suitable script or batch file on the current execution path that will yield the required results.

Note that the specified command will be invoked by Runtime.exec and must be capable or working as such. This may preclude direct use of builtin commands on some systems. For example, you cannot directly exec the Windows "set" command built in to the standard Windows command shell.

The command must print out a series of lines of the form name=value, one for each environment variable.

  • Constructor Details

    • SysEnv

      public SysEnv()

  • Method Details

    • setCommand

      public static void setCommand(String cmd)
      Set the command to be executed to access the OS environment variables. To be effective, this method must be set before any of the get methods,
      Parameters:
      cmd - the command to be executed

    • get

      public static String get(String name)
      Get the value of a specified environment value.
      Parameters:
      name - the name of the environment variable
      Returns:
      the value of the environment variable if set, or null if not

    • getAll

      public static Map<String,String> getAll()
      Get a map containing all of the environment variables in the current execution context.
      Returns:
      a map containing all the known environment variables.

    • getAll

      public static Map<String,String> getAll(Map<String,String> m)
      Get a map containing all of the environment variables in the current execution context.
      Parameters:
      m - the map in which to put the names and values of all the environment variables in the current execution context.
      Returns:
      the argument map.