public object GetMaxVersion()
{
if (string.IsNullOrEmpty(_context.Entity.Version))
{
return(null);
}
var version = _context.Entity.GetVersionField();
_context.Debug(() => $"Detecting max output version: {_context.Connection.Folder}.{_context.Entity.Alias}.{version.Alias}.");
var tflDeleted = _context.Entity.TflDeleted();
var sort = new Sort(new SortField(version.Alias, LuceneConversion.TypeSort(version.Type), true));
var hits = _searcher.Search(LuceneConversion.TypeSearch(tflDeleted, tflDeleted.Alias, false), null, 1, sort);
if (hits.TotalHits > 0)
{
var doc = _searcher.Doc(hits.ScoreDocs[0].Doc);
var value = doc.Get(version.Alias);
_context.Debug(() => $"Found value: {value}");
return(version.Convert(value));
}
_context.Debug(() => "Did not find max output version");
return(null);
}
public IEnumerable <IRow> Read()
{
using (var reader = _readerFactory.Create()) {
var numDocs = reader.NumDocs();
var selector = new MapFieldSelector(_fields.Select(f => f.Name).ToArray());
using (var searcher = _searcherFactory.Create()) {
// read from input? consider filters, and field names
if (_readFrom == ReadFrom.Input)
{
if (_context.Entity.Filter.Any())
{
var queryFields = _context.Entity.Filter.Select(f => f.Field).ToArray();
var query = string.Join(" ", _context.Entity.Filter.Select(f => "(" + (string.IsNullOrEmpty(f.Expression) ? f.Field + ":" + f.Value : f.Expression) + ") " + f.Continuation.ToUpper()));
query = query.Remove(query.Length - 3);
var topFieldCollector = TopFieldCollector.Create(Sort.INDEXORDER, numDocs, false, false, false, false);
searcher.Search(new MultiFieldQueryParser(V, queryFields, _analyzer).Parse(query), topFieldCollector);
var topDocs = topFieldCollector.TopDocs();
if (topDocs == null)
{
yield break;
}
for (var i = 0; i < topDocs.TotalHits; i++)
{
var row = _rowFactory.Create();
var doc = searcher.Doc(i, selector);
foreach (var field in _fields)
{
row[field] = field.Convert(doc.Get(field.Name));
}
yield return(row);
}
}
else
{
for (var i = 0; i < numDocs; i++)
{
if (reader.IsDeleted(i))
{
continue;
}
var doc = reader.Document(i, selector);
var row = _rowFactory.Create();
foreach (var field in _fields)
{
row[field] = field.Convert(doc.Get(field.Name));
}
yield return(row);
}
}
}
else // read from output? consider tfldeleted and field aliases
{
var tflDeleted = _context.Entity.TflDeleted();
var collector = TopFieldCollector.Create(Sort.INDEXORDER, numDocs, false, false, false, false);
searcher.Search(LuceneConversion.TypeSearch(tflDeleted, tflDeleted.Alias, false), collector);
var topDocs = collector.TopDocs();
if (topDocs == null)
{
yield break;
}
for (var i = 0; i < topDocs.TotalHits; i++)
{
var row = _rowFactory.Create();
var doc = searcher.Doc(i, selector);
foreach (var field in _fields)
{
row[field] = field.Convert(doc.Get(field.Alias));
}
yield return(row);
}
}
}
}
}