/// <summary>
/// Return the combined file lists, real file abstract layer has higher priority
/// </summary>
/// <param name="wildCardPattern"></param>
/// <param name="subFolder"></param>
/// <returns></returns>
public IEnumerable <FileItem> ListFiles(string wildCardPattern, string subFolder, bool allDirectories = false)
{
if (wildCardPattern == null)
{
throw new ArgumentNullException(nameof(wildCardPattern));
}
var currentFiles = RealFileAbstractLayer.ListFiles(wildCardPattern, subFolder, allDirectories);
if (FallbackFileAbstractLayer != null)
{
var currentFileFilePathSet = new HashSet <string>(currentFiles.Select(a => a.RelativePath));
var fallbackFiles = FallbackFileAbstractLayer.ListFiles(wildCardPattern, subFolder, allDirectories).Where(i => !currentFileFilePathSet.Contains(i.RelativePath));
return(currentFiles.Concat(fallbackFiles).ToList());
}
else
{
return(currentFiles);
}
}
/// <summary>
/// Alwasy write to real file abstract layer
/// </summary>
public Stream OpenWrite(string relativePath)
{
return(RealFileAbstractLayer.OpenWrite(relativePath));
}