/// <summary>Construct a list of StatusPair objects</summary>
/// <param name="fs">The FileSystem where 'path' lives</param>
/// <param name="path">The directory to query</param>
/// <param name="filter">A possible filter for entries in the directory</param>
/// <exception cref="System.IO.IOException"/>
public StatusPairs(FileSystem fs, Path path, PathFilter filter)
{
/* Grab all the file statuses at once in an array */
FileStatus[] fileStatuses = fs.ListStatus(path, filter);
/* We'll have an array of StatusPairs of the same length */
AclStatus aclStatus = null;
statusPairs = new FSOperations.StatusPair[fileStatuses.Length];
/*
* For each FileStatus, attempt to acquire an AclStatus. If the
* getAclStatus throws an exception, we assume that ACLs are turned
* off entirely and abandon the attempt.
*/
bool useAcls = true;
// Assume ACLs work until proven otherwise
for (int i = 0; i < fileStatuses.Length; i++)
{
if (useAcls)
{
try
{
aclStatus = fs.GetAclStatus(fileStatuses[i].GetPath());
}
catch (AclException)
{
/* Almost certainly due to an "ACLs not enabled" exception */
aclStatus = null;
useAcls = false;
}
catch (NotSupportedException)
{
/* Ditto above - this is the case for a local file system */
aclStatus = null;
useAcls = false;
}
}
statusPairs[i] = new FSOperations.StatusPair(fileStatuses[i], aclStatus);
}
}
/// <summary>
/// Executes the filesystem getFileStatus operation and returns the
/// result in a JSONish Map.
/// </summary>
/// <param name="fs">filesystem instance to use.</param>
/// <returns>a Map object (JSON friendly) with the file status.</returns>
/// <exception cref="System.IO.IOException">thrown if an IO error occurred.</exception>
public virtual IDictionary Execute(FileSystem fs)
{
FSOperations.StatusPair sp = new FSOperations.StatusPair(fs, path);
return(sp.ToJson());
}
