/// <summary>
/// Create a CanonicalPathCache.
/// </summary>
///
/// <remarks>
/// Creates the appropriate PathStrategy object which encapsulates
/// the correct algorithm. Falls back to different implementations
/// depending on platform.
/// </remarks>
///
/// <param name="maxCapacity">Size of the cache.</param>
/// <param name="symlinks">Policy for following symlinks.</param>
/// <returns>A new CanonicalPathCache.</returns>
public static CanonicalPathCache Create(ILogger logger, int maxCapacity, Symlinks symlinks)
{
PathStrategy pathStrategy;
switch (symlinks)
{
case Symlinks.Follow:
try
{
pathStrategy = Win32.IsWindows() ?
(PathStrategy) new GetFinalPathNameByHandleStrategy() :
(PathStrategy) new PosixSymlinkStrategy();
}
catch (Exception)
{
// Failed to late-bind a suitable library.
logger.Log(Severity.Warning, "Preserving symlinks in canonical paths");
pathStrategy = new QueryDirectoryStrategy();
}
break;
case Symlinks.Preserve:
pathStrategy = new QueryDirectoryStrategy();
break;
default:
throw new ArgumentOutOfRangeException("Invalid symlinks option");
}
return(new CanonicalPathCache(maxCapacity, pathStrategy));
}
/// <summary>
/// Create cache with a given capacity.
/// </summary>
/// <param name="pathStrategy">The algorithm for determining the canonical path.</param>
/// <param name="capacity">The size of the cache.</param>
public CanonicalPathCache(int maxCapacity, PathStrategy pathStrategy)
{
if (maxCapacity <= 0)
{
throw new ArgumentOutOfRangeException("Invalid cache size specified");
}
this.maxCapacity = maxCapacity;
this.pathStrategy = pathStrategy;
}