private static void AddToCache(int key, Timezone timezone)
{
if (timezone == null)
{
throw new ArgumentException("timezone cannot be null.");
}
lock (_syncRoot)
{
_cache[key] = timezone;
}
}
public static Timezone Parse(string timezone)
{
// Format +530 or -530
var match = Pattern.Match(timezone);
if (match.Success == false)
{
throw new ArgumentException(timezone + " is not a valid Timezone value.");
}
var hour = int.Parse(match.Groups["hour"].Value);
uint min = uint.Parse(match.Groups["min"].Value);
return(Timezone.Create(hour, min));
}
private static void AddToCache(int key, Timezone timezone)
{
if (timezone == null)
throw new ArgumentException("timezone cannot be null.");
_lock.EnterWriteLock();
try
{
_cache[key] = timezone;
}
finally
{
_lock.ExitWriteLock();
}
}
private static bool TryGetFromCache(int key, out Timezone timezone)
{
timezone = null;
lock (_syncRoot)
{
if (_cache.TryGetValue(key, out timezone) == true)
{
return(true);
}
else
{
return(false);
}
}
}
private static void AddToCache(int key, Timezone timezone)
{
if (timezone == null)
{
throw new ArgumentException("timezone cannot be null.");
}
_lock.EnterWriteLock();
try
{
_cache[key] = timezone;
}
finally
{
_lock.ExitWriteLock();
}
}
private static bool TryGetFromCache(int key, out Timezone timezone)
{
timezone = null;
_lock.EnterReadLock();
try
{
if (_cache.TryGetValue(key, out timezone) == true)
return true;
else
return false;
}
finally
{
_lock.ExitReadLock();
}
}
public static Timezone Create(int hours, uint mins)
{
if (hours > 19)
throw new Exception("Hours cannot be greater than +/- 19.");
if (mins != 0 && mins != 30 && mins != 45)
throw new Exception("Minute values can only be 0, 30 or 45.");
Timezone zone = null;
// Offset the -19 to always return a positive number
int key = (20 + hours) * 60 + (int)mins;
if (TryGetFromCache(key, out zone) == false)
{
zone = new Timezone(hours, mins);
AddToCache(key, zone);
}
return zone;
}
private static bool TryGetFromCache(int key, out Timezone timezone)
{
timezone = null;
_lock.EnterReadLock();
try
{
if (_cache.TryGetValue(key, out timezone) == true)
{
return(true);
}
else
{
return(false);
}
}
finally
{
_lock.ExitReadLock();
}
}
public static bool TryParse(string timezone, out Timezone zone)
{
zone = null;
try
{
// Format +530 or -530
var match = Pattern.Match(timezone);
if (match.Success == false)
{
return(false);
}
var hour = int.Parse(match.Groups["hour"].Value);
var min = uint.Parse(match.Groups["min"].Value);
zone = Timezone.Create(hour, min);
return(true);
}
catch
{
zone = null;
return(false);
}
}
public static Timezone Create(int hours, uint mins)
{
if (hours > 19)
{
throw new Exception("Hours cannot be greater than +/- 19.");
}
if (mins != 0 && mins != 30 && mins != 45)
{
throw new Exception("Minute values can only be 0, 30 or 45.");
}
Timezone zone = null;
// Offset the -19 to always return a positive number
int key = (20 + hours) * 60 + (int)mins;
if (TryGetFromCache(key, out zone) == false)
{
zone = new Timezone(hours, mins);
AddToCache(key, zone);
}
return(zone);
}
public static bool TryParse(string timezone, out Timezone zone)
{
zone = null;
try
{
// Format +530 or -530
var match = Pattern.Match(timezone);
if (match.Success == false)
return false;
var hour = int.Parse(match.Groups["hour"].Value);
var min = uint.Parse(match.Groups["min"].Value);
zone = Timezone.Create(hour, min);
return true;
}
catch
{
zone = null;
return false;
}
}
private static void AddToCache(int key, Timezone timezone)
{
if (timezone == null)
throw new ArgumentException("timezone cannot be null.");
lock (_syncRoot)
{
_cache[key] = timezone;
}
}
private static bool TryGetFromCache(int key, out Timezone timezone)
{
timezone = null;
lock (_syncRoot)
{
if (_cache.TryGetValue(key, out timezone) == true)
return true;
else
return false;
}
}