/// <summary>
/// Initializes a new instance of <see cref="MultiFileSource"/>.
/// In case of usage from Maml, the paths would be wildcard concatenated in the first string of <paramref name="paths"/>.
/// </summary>
/// <param name="paths">The paths of the files to load.</param>
public MultiFileSource(params string[] paths)
{
Contracts.CheckValueOrNull(paths);
// calling the ctor passing null, creates an array of 1, null element
// The types using MFS know how to account for an empty path
// if the paths array is empty, therefore keeping that behavior.
if (paths == null || (paths.Length == 1 && paths[0] == null))
{
_paths = new string[0];
return;
}
// in case of usage from Maml, the paths would be wildcard concatenated in the
// first string of paths.
string[] concatenated = paths[0] != null?StreamUtils.ExpandWildCards(paths[0]) : null;
if (concatenated != null && concatenated.Length > 1)
{
if (paths.Length > 1)
{
throw Contracts.Except($"Pass a single string to the {nameof(MultiFileSource)} constructor, if you are using wildcards.");
}
_paths = concatenated;
}
else
{
_paths = paths;
}
}
/// <summary>
/// Checks the validity of a given path, and whether or not it is a
/// valid path to a data file, or a path to a directory of files.
/// </summary>
/// <param name="path">Specifies a file or path of files from which to load.</param>
private static void CheckValidPathContents(string path)
{
Contracts.CheckNonEmpty(path, nameof(path));
if (!File.Exists(path) && StreamUtils.ExpandWildCards(path).Length < 1)
{
throw Contracts.ExceptParam(nameof(path), "File or directory does not exist at path: {0}", path);
}
}
public MultiFileSource(string path)
{
Contracts.CheckValueOrNull(path);
if (string.IsNullOrEmpty(path))
{
_paths = new string[0];
return;
}
_paths = StreamUtils.ExpandWildCards(path);
if (_paths.Length == 0)
{
throw Contracts.ExceptIO("Could not find file '{0}'", path);
}
}
/// <summary>
/// Initializes a new instance of <see cref="MultiFileSource"/>.
/// In case of usage from Maml, the paths would be wildcard concatenated in the first string of <paramref name="paths"/>.
/// </summary>
/// <param name="paths">The paths of the files to load.</param>
/// <remarks>
/// The provided <paramref name="paths"/> can utilize wildcards to load all source files. For example:
/// paths = "Data/*" includes all files in directory Data
/// paths = "DataFolder/.../*" includes all files in all subdirectories inside directory Data.
/// paths = "Data1/*", "Data2/*" includes all files in directories Data1 and Data2
/// </remarks>
public MultiFileSource(params string[] paths)
{
Contracts.CheckValueOrNull(paths);
// calling the ctor passing null, creates an array of 1, null element
// The types using MFS know how to account for an empty path
// if the paths array is empty, therefore keeping that behavior.
if (paths == null || (paths.Length == 1 && paths[0] == null))
{
_paths = new string[0];
return;
}
List <string> concatenated = new List <string>();
if (paths != null)
{
foreach (string path in paths)
{
foreach (string rPath in StreamUtils.ExpandWildCards(path))
{
concatenated.Add(rPath);
}
}
}
else
{
concatenated = null;
}
if (concatenated != null && concatenated.Count > 0)
{
_paths = concatenated.ToArray();
}
else
{
_paths = paths;
}
}