public bool TryGetValuesPartial(IEnumerable <ICompoundIndexKey> myKeys, out ICloseableEnumerable <long> myVertexIDs)
{
LuceneReturn results = null;
var results_compound = new List <Tuple <long, IComparable, long> >();
foreach (var key in myKeys)
{
results = _LuceneIndex.GetEntriesInnerByField(_MaxResultsFirst, key.Key as String, key.PropertyID.ToString(), LuceneIndex.Fields.PROPERTY_ID);
if (results.TotalHits > _MaxResultsFirst)
{
results.Close();
results = _LuceneIndex.GetEntriesInnerByField(_MaxResultsFirst, key.Key as String, key.PropertyID.ToString(), LuceneIndex.Fields.PROPERTY_ID);
}
results_compound.AddRange(results.Where((e) => e.PropertyId != null).Select((e) => new Tuple <long, IComparable, long>((long)e.PropertyId, e.Text, e.VertexId)));
}
var grouped = from myresults in results_compound group myresults by myresults.Item3;
if (grouped.Count() > 0)
{
myVertexIDs = new CloseableEnumerable <long>(grouped.Select <IGrouping <long, Tuple <long, IComparable, long> >, long>((g) => g.Key), results.Close);
return(true);
}
else
{
myVertexIDs = null;
return(false);
}
}
/// <summary>
/// Checks whether the Lucene index has entries matching the specified Lucene query.
/// </summary>
///
/// <param name="myQuery">The query string.</param>
/// <param name="select">A predicate which takes a LuceneEntry and returns whether a LuceneEntry should be taken into account when looking for Lucene entries.
/// If this parameter is NULL, no Lucene entry is ignored.</param>
///
/// <returns>
/// true, if there are matching entries; otherwise false.
/// </returns>
///
/// <exception cref="System.ArgumentNullException">
/// myQuery is NULL.
/// </exception>
/// <exception cref="System.ArgumentException">
/// myQuery is an empty string or contains only whitespace.
/// </exception>
public Boolean HasEntry(String myQuery, Predicate <LuceneEntry> select = null)
{
if (myQuery == null)
{
throw new InvalidOperationException("myQuery cannot be null!");
}
LuceneReturn ret = null;
if (select != null)
{
ret = GetEntries(1, myQuery);
ret.Close();
if (ret.TotalHits > 0)
{
ret = GetEntries(ret.TotalHits, myQuery);
foreach (var entry in ret)
{
if (select(entry))
{
ret.Close();
return(true);
}
}
}
ret.Close();
return(false);
}
else
{
ret = GetEntries(1, myQuery);
ret.Close();
if (ret.TotalHits > 0)
{
return(true);
}
else
{
return(false);
}
}
}
/// <summary>
/// Deletes all entries that match the specified Lucene query.
/// </summary>
///
/// <param name="myLuceneQuery">The Lucene query.</param>
/// <param name="select">A predicate which takes a LuceneEntry and returns whether a LuceneEntry should be taken into account when deleting entries.
/// If this parameter is NULL, no Lucene entry is ignored.</param>
///
/// <returns>
/// 0 (zero) if the operation succeeded; otherwise a value other than 0 (zero).
/// </returns>
///
/// <exception cref="System.ArgumentNullException">
/// myLuceneQuery is NULL.
/// </exception>
public int DeleteEntry(String myLuceneQuery, Predicate <LuceneEntry> select = null)
{
int count = 0;
if (myLuceneQuery == null)
{
throw new InvalidOperationException("myLuceneQuery parameter cannot be null!");
}
var reader = GetIndexReader(false);
LuceneReturn ret = null;
ret = GetEntries(1, myLuceneQuery);
if (ret.TotalHits > 1)
{
ret.Close();
ret = GetEntries(ret.TotalHits, myLuceneQuery);
}
foreach (var entry in ret)
{
if ((select == null) || select(entry))
{
if (entry.DocNum != null)
{
int docnum = (int)entry.DocNum;
reader.DeleteDocument(docnum);
count++;
}
}
}
ret.Close();
CloseIndexReader(reader);
return(count);
}
public LuceneResultEntryListEnumerator(LuceneReturn myLuceneReturn)
{
_LuceneReturnEnumerator = myLuceneReturn.GetEnumerator();
}
public LuceneResult(LuceneReturn result)
{
_entries = new LuceneResultEntryList(result);
_MaxScore = result.MaxScore;
}
public LuceneResultEntryList(LuceneReturn myLuceneReturn)
{
_LuceneReturn = myLuceneReturn;
}
public bool TryGetValues(IEnumerable <ICompoundIndexKey> myKeys, out ICloseableEnumerable <long> myVertexIDs)
{
LuceneReturn results = null;
var results_compound = new List <Tuple <long, IComparable, long> >();
foreach (var key in myKeys)
{
results = _LuceneIndex.GetEntriesInnerByField(_MaxResultsFirst, key.Key as String, key.PropertyID.ToString(), LuceneIndex.Fields.PROPERTY_ID);
if (results.TotalHits > _MaxResultsFirst)
{
results.Close();
results = _LuceneIndex.GetEntriesInnerByField(results.TotalHits, key.Key as String, key.PropertyID.ToString(), LuceneIndex.Fields.PROPERTY_ID);
}
results_compound.AddRange(results
.Where((e) => e.PropertyId != null)
.Select((e) => new Tuple <long, IComparable, long>((long)e.PropertyId, e.Text, e.VertexId)));
}
var grouped = from myresults in results_compound group myresults by myresults.Item3;
if (grouped.Count() > 0)
{
var _myVertexIDs = grouped
.Where((myGroup) =>
{
var join =
from entry in myGroup
join key in myKeys
on new
{
JoinField1 = entry.Item2,
JoinField2 = entry.Item1
}
equals new
{
JoinField1 = key.Key,
JoinField2 = key.PropertyID
}
select entry;
if (join.Count() == myKeys.Count())
{
return(true);
}
else
{
return(false);
}
})
.Select <IGrouping <long, Tuple <long, IComparable, long> >, long>((g) => g.Key);
if (_myVertexIDs.Count() > 0)
{
myVertexIDs = new CloseableEnumerable <long>(_myVertexIDs, results.Close);
return(true);
}
else
{
myVertexIDs = null;
return(false);
}
}
else
{
myVertexIDs = null;
return(false);
}
}