/// <summary>NOTE: modifies and returns either "this" or "other"</summary>
public virtual SmallDocSet Union(SmallDocSet other)
{
SmallDocSet bigger;
SmallDocSet smaller;
if (other.intSet.Count > this.intSet.Count)
{
bigger = other;
smaller = this;
}
else
{
bigger = this;
smaller = other;
}
//modify bigger
foreach (int v in smaller.intSet.Keys)
{
if (v == smaller.intSet.EmptyVal)
{
continue;
}
bigger.Set(v);
}
return(bigger);
}
/// <summary>NOTE: modifies and returns either "this" or "other"</summary>
/// <exception cref="ArgumentNullException"><paramref name="other"/> is <c>null</c>.</exception>
public virtual SmallDocSet Union(SmallDocSet other)
{
if (other is null)
{
throw new ArgumentNullException(nameof(other));
}
SmallDocSet bigger;
SmallDocSet smaller;
if (other.intSet.Count > this.intSet.Count)
{
bigger = other;
smaller = this;
}
else
{
bigger = this;
smaller = other;
}
//modify bigger
foreach (int v in smaller.intSet.Keys)
{
if (v == smaller.intSet.EmptyVal)
{
continue;
}
bigger.Set(v);
}
return(bigger);
}
private SmallDocSet?CollectDocs(IBits acceptContains)
{
// LUCENENET specific - guard against null m_termsEnum
if (m_termsEnum is null)
{
//signals all done
return(null);
}
SmallDocSet?set = null;
m_docsEnum = m_termsEnum.Docs(acceptContains, m_docsEnum, DocsFlags.NONE);
int docid;
while ((docid = m_docsEnum.NextDoc()) != DocIdSetIterator.NO_MORE_DOCS)
{
if (set is null)
{
int size = this.m_termsEnum.DocFreq;
if (size <= 0)
{
size = 16;
}
set = new SmallDocSet(size);
}
set.Set(docid);
}
return(set);
}
//see getLeafDocs
/// <summary>This is the primary algorithm; recursive.</summary>
/// <remarks>This is the primary algorithm; recursive. Returns null if finds none.</remarks>
/// <exception cref="System.IO.IOException"></exception>
internal SmallDocSet Visit(Cell cell, IBits acceptContains
)
{
if (termsEnum == null)
{
//signals all done
return(null);
}
//Leaf docs match all query shape
SmallDocSet leafDocs = GetLeafDocs(cell, acceptContains);
// Get the AND of all child results
SmallDocSet combinedSubResults = null;
ICollection <Cell> subCells = cell.GetSubCells(_enclosing.queryShape);
foreach (Cell subCell in subCells)
{
if (!SeekExact(subCell))
{
combinedSubResults = null;
}
else
{
if (subCell.Level == _enclosing.detailLevel)
{
combinedSubResults = GetDocs(subCell, acceptContains);
}
else
{
if (subCell.GetShapeRel() == SpatialRelation.WITHIN)
{
combinedSubResults = GetLeafDocs(subCell, acceptContains);
}
else
{
combinedSubResults = Visit(subCell, acceptContains);
}
}
}
//recursion
if (combinedSubResults == null)
{
break;
}
acceptContains = combinedSubResults;
}
//has the 'AND' effect on next iteration
// Result: OR the leaf docs with AND of all child results
if (combinedSubResults != null)
{
if (leafDocs == null)
{
return(combinedSubResults);
}
return(leafDocs.Union(combinedSubResults));
}
return(leafDocs);
}
private SmallDocSet CollectDocs(Bits acceptContains)
{
SmallDocSet set = null;
docsEnum = termsEnum.Docs(acceptContains, docsEnum, DocsEnum.FLAG_NONE);
int docid;
while ((docid = docsEnum.NextDoc()) != DocIdSetIterator.NO_MORE_DOCS)
{
if (set == null)
{
int size = this.termsEnum.DocFreq();
if (size <= 0)
{
size = 16;
}
set = new SmallDocSet(size);
}
set.Set(docid);
}
return(set);
}
internal Cell nextCell;//see getLeafDocs
/// <remarks>This is the primary algorithm; recursive. Returns null if finds none.</remarks>
/// <exception cref="System.IO.IOException"></exception>
internal SmallDocSet Visit(Cell cell, Bits acceptContains)
{
if (termsEnum == null)
{
//signals all done
return(null);
}
ContainsPrefixTreeFilter outerInstance = (ContainsPrefixTreeFilter)base.outerInstance;
//Leaf docs match all query shape
SmallDocSet leafDocs = GetLeafDocs(cell, acceptContains);
// Get the AND of all child results (into combinedSubResults)
SmallDocSet combinedSubResults = null;
// Optimization: use null subCellsFilter when we know cell is within the query shape.
IShape subCellsFilter = outerInstance.queryShape;
if (cell.Level != 0 && ((cell.ShapeRel == SpatialRelation.NOT_SET || cell.ShapeRel == SpatialRelation.WITHIN)))
{
subCellsFilter = null;
Debug.Assert(cell.Shape.Relate(outerInstance.queryShape) == SpatialRelation.WITHIN);
}
ICollection <Cell> subCells = cell.GetSubCells(subCellsFilter);
foreach (Cell subCell in subCells)
{
if (!SeekExact(subCell))
{
combinedSubResults = null;
}
else if (subCell.Level == outerInstance.detailLevel)
{
combinedSubResults = GetDocs(subCell, acceptContains);
}
else if (!outerInstance.multiOverlappingIndexedShapes &&
subCell.ShapeRel == SpatialRelation.WITHIN)
{
combinedSubResults = GetLeafDocs(subCell, acceptContains); //recursion
}
else
{
combinedSubResults = Visit(subCell, acceptContains);
}
if (combinedSubResults == null)
{
break;
}
acceptContains = combinedSubResults;//has the 'AND' effect on next iteration
}
// Result: OR the leaf docs with AND of all child results
if (combinedSubResults != null)
{
if (leafDocs == null)
{
return(combinedSubResults);
}
return(leafDocs.Union(combinedSubResults));//union is 'or'
}
return(leafDocs);
}