private ICursor GetQuery(DocumentTaskTypes taskType, DocumentsProvider provider, string parentDocumentId, string query)
{
switch (taskType)
{
case DocumentTaskTypes.QueryChildDocuments:
return(provider.QueryChildDocuments(parentDocumentId, FileDocumentItem.DocumentProjection,
(string)null));
case DocumentTaskTypes.QuerySearchDocuments:
return(provider.QuerySearchDocuments(parentDocumentId, query,
FileDocumentItem.DocumentProjection));
case DocumentTaskTypes.QueryDocument:
return(provider.QueryDocument(parentDocumentId, FileDocumentItem.DocumentProjection));
default:
throw new NotImplementedException(taskType.ToString());
}
}
private FileDocumentItem[] RunInBackground(DocumentTaskTypes documentTaskType, DocumentsProvider provider,
string parentDocumentId, string query, string searchMimeType, bool?isCategoryOpenable,
out string parentId)
{
parentId = null;
var result = new List <FileDocumentItem>();
var isFirstRecord = documentTaskType == DocumentTaskTypes.QuerySearchDocuments;
using (var cursor = GetQuery(documentTaskType, provider, parentDocumentId, query))
{
if (cursor == null || cursor.Count == 0)
{
return(null);
}
while (cursor.MoveToNext())
{
if (IfCancellationRequested())
{
return(null);
}
if (isFirstRecord)
{
isFirstRecord = false;
var columnIndex =
cursor.GetColumnIndex(Sb49DocumentsContract.Document.ColumnParentDocumentId);
if (columnIndex >= 0)
{
parentId = cursor.GetString(columnIndex);
}
}
var item = new FileDocumentItem(provider.Context, cursor);
if (!item.IsFolder)
{
if (isCategoryOpenable == true &&
!Util.HasFlags(item.Flags, (int)DocumentContractFlags.SupportsWrite))
{
continue;
}
if (!string.IsNullOrEmpty(searchMimeType) && !string.Equals(item.MimeType, searchMimeType,
StringComparison.OrdinalIgnoreCase))
{
continue;
}
}
result.Add(item);
}
cursor.Close();
}
if (IfCancellationRequested())
{
return(null);
}
return(result.ToArray());
}