/// <summary>
/// Retrieve any instances of objects at this Station with the specified criteria.
/// </summary>
/// <returns>Set of instances found at this Station</returns>
public override InstanceRefList DoSearch(ICollection<Criterion> crit)
{
InstanceRefList results = new InstanceRefList(this);
string possibleError;
var unc = ConnectUnc(out possibleError);
try
{
// build extension filter
Expression<Func<FileInfo, bool>> extFilter = null;
if (Extensions.Count > 0)
{
extFilter = PredicateBuilder.False<FileInfo>();
foreach (string ext in Extensions)
{
// The temporary variable in the loop is required to avoid the outer variable trap,
// where the same variable is captured for each iteration of the foreach loop.
string temp = ext;
extFilter = extFilter.Or(f => temp.Equals(f.Extension, StringComparison.InvariantCultureIgnoreCase));
}
}
foreach (Folder folder in Folders)
if (IncludeFolder(folder, crit))
{
if (results.List.Count >= MaxSearchResults)
break;
SearchFolder(crit, folder, extFilter, results);
if (IncludeSubFolders(folder))
{
List<Folder> subFolders = GetSubFolders(folder);
foreach (var subFolder in subFolders)
{
if (results.List.Count >= MaxSearchResults)
break;
SearchFolder(crit, subFolder, extFilter, results);
}
}
}
}
finally
{
if (unc != null) unc.Dispose();
}
return results;
}
/// <summary>
/// Search one folder, add to results
/// </summary>
/// <param name="crit"></param>
/// <param name="folder"></param>
/// <param name="extFilter"></param>
/// <param name="results"></param>
protected virtual void SearchFolder(ICollection<Criterion> crit, Folder folder, Expression<Func<FileInfo, bool>> extFilter, InstanceRefList results)
{
DirectoryInfo dir = new DirectoryInfo(folder.Path);
var query = (from file in dir.EnumerateFiles() select file).AsQueryable();
if (extFilter != null)
{
query = query.Where(extFilter);
}
query = ApplyFileInfoCriteria(crit, query, folder);
foreach (FileInfo f in query.ToList()) // TODO speed up; taking 14% of search time
{
if (results.List.Count >= MaxSearchResults)
break;
if (Valid(f, crit)) // apply other criteria that need to be done on the file content
{
FileFolderInstance i = CreateInstance();
// populate properties
// Method to be overridden in subclass. Default = filename without extension.
i.ID = MapFileToId(f, folder);
i.EntityName = EntityName;
i.FileName = f.Name;
i.Status = MapFileToStatus(f, folder);
i.UniqueId = MapFileToUniqueId(f, folder);
i.UpdateDate = f.LastWriteTime;
i.ArrivalDate = f.CreationTime;
i.Location = folder.Name + "/" + f.Name;
i.Path = folder.Path + "/" + f.Name;
i.FileSize = f.Length;
i.User = User;
i.Password = Password;
PopulateCustomProperties(i);
InstanceRef iref = Memory.AddRef(i, this);
results.AddInstanceRef(iref);
}
}
}
private void SearchStation(string role, Station s, ConcurrentBag<InstanceRefList> results)
{
// TODO first check if the station supports the object type ???
// or is this part of criteria? e.g. TYPE = 'ORDER'
InstanceRefList irl = null;
try
{
s.CheckSupportedCriteria(crit); // will throw exception if not supported
if (!UnsupportedCustomFields(s) && (string.IsNullOrEmpty(role) || s.HasRole(role)))
irl = DoSearchWithRetry(s);
}
catch (StationUnsupportedCriterionException ex)
{
irl = new InstanceRefList(s);
irl.Error = "Station skipped: " + Util.ExceptionMessageIncludingInners(ex);
}
catch (Exception ex)
{
irl = new InstanceRefList(s);
irl.Error = Util.ExceptionMessageIncludingInners(ex);
}
finally
{
if (irl != null)
results.Add(irl);
}
}