public abstract class SystemReader extends Object
When writing unit tests, extending this interface with a custom class permits to simulate an access to a system variable or property and permits to control the user's global configuration.
| Constructor and Description |
|---|
SystemReader() |
| Modifier and Type | Method and Description |
|---|---|
abstract long |
getCurrentTime() |
DateFormat |
getDateTimeInstance(int dateStyle,
int timeStyle)
Returns a date/time format instance for the given styles.
|
abstract String |
getenv(String variable) |
abstract String |
getHostname()
Gets the hostname of the local host.
|
static SystemReader |
getInstance() |
Locale |
getLocale() |
abstract String |
getProperty(String key) |
SimpleDateFormat |
getSimpleDateFormat(String pattern)
Returns a simple date format instance as specified by the given pattern.
|
SimpleDateFormat |
getSimpleDateFormat(String pattern,
Locale locale)
Returns a simple date format instance as specified by the given pattern.
|
TimeZone |
getTimeZone() |
abstract int |
getTimezone(long when) |
boolean |
isMacOS() |
boolean |
isWindows() |
abstract FileBasedConfig |
openSystemConfig(Config parent,
FS fs) |
abstract FileBasedConfig |
openUserConfig(Config parent,
FS fs) |
static void |
setInstance(SystemReader newReader) |
public static SystemReader getInstance()
public static void setInstance(SystemReader newReader)
newReader - the new instance to use when accessing properties, or null for
the default instance.public abstract String getHostname()
public abstract String getenv(String variable)
variable - system variable to readpublic abstract String getProperty(String key)
key - of the system property to readpublic abstract FileBasedConfig openUserConfig(Config parent, FS fs)
parent - a config with values not found directly in the returned configfs - the file system abstraction which will be necessary to perform
certain file system operations.public abstract FileBasedConfig openSystemConfig(Config parent, FS fs)
parent - a config with values not found directly in the returned
config. Null is a reasonable value here.fs - the file system abstraction which will be necessary to perform
certain file system operations.public abstract long getCurrentTime()
public abstract int getTimezone(long when)
when - TODOpublic TimeZone getTimeZone()
public Locale getLocale()
public SimpleDateFormat getSimpleDateFormat(String pattern)
pattern - the pattern as defined in
SimpleDateFormat.SimpleDateFormat(String)public SimpleDateFormat getSimpleDateFormat(String pattern, Locale locale)
pattern - the pattern as defined in
SimpleDateFormat.SimpleDateFormat(String)locale - locale to be used for the SimpleDateFormatpublic DateFormat getDateTimeInstance(int dateStyle, int timeStyle)
dateStyle - the date style as specified in
DateFormat.getDateTimeInstance(int, int)timeStyle - the time style as specified in
DateFormat.getDateTimeInstance(int, int)public boolean isWindows()
public boolean isMacOS()
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