public override void Add(K key, WeightedSpanTerm value)
{
base.Add(key, value);
WeightedSpanTerm prev = this[key];
if (prev == null)
{
return;
}
WeightedSpanTerm prevTerm = prev;
WeightedSpanTerm newTerm = value;
if (!prevTerm.IsPositionSensitive())
{
newTerm.SetPositionSensitive(false);
}
}
/// <summary>
/// Extracts the weighted span terms.
/// </summary>
/// <param name="terms">The terms.</param>
/// <param name="spanQuery">The span query.</param>
private void ExtractWeightedSpanTerms(IDictionary <String, WeightedSpanTerm> terms, SpanQuery spanQuery)
{
HashSet <String> fieldNames;
if (fieldName == null)
{
fieldNames = new HashSet <String>();
CollectSpanQueryFields(spanQuery, fieldNames);
}
else
{
fieldNames = new HashSet <String>();
fieldNames.Add(fieldName);
}
// To support the use of the default field name
if (defaultField != null)
{
fieldNames.Add(defaultField);
}
IDictionary <String, SpanQuery> queries = new HashMap <String, SpanQuery>();
var nonWeightedTerms = new HashSet <Term>();
bool mustRewriteQuery = MustRewriteQuery(spanQuery);
if (mustRewriteQuery)
{
foreach (String field in fieldNames)
{
SpanQuery rewrittenQuery = (SpanQuery)spanQuery.Rewrite(GetReaderForField(field));
queries[field] = rewrittenQuery;
rewrittenQuery.ExtractTerms(nonWeightedTerms);
}
}
else
{
spanQuery.ExtractTerms(nonWeightedTerms);
}
List <PositionSpan> spanPositions = new List <PositionSpan>();
foreach (String field in fieldNames)
{
IndexReader reader = GetReaderForField(field);
Spans spans;
if (mustRewriteQuery)
{
spans = queries[field].GetSpans(reader);
}
else
{
spans = spanQuery.GetSpans(reader);
}
// collect span positions
while (spans.Next())
{
spanPositions.Add(new PositionSpan(spans.Start(), spans.End() - 1));
}
}
if (spanPositions.Count == 0)
{
// no spans found
return;
}
foreach (Term queryTerm in nonWeightedTerms)
{
if (FieldNameComparator(queryTerm.Field))
{
WeightedSpanTerm weightedSpanTerm = terms[queryTerm.Text];
if (weightedSpanTerm == null)
{
weightedSpanTerm = new WeightedSpanTerm(spanQuery.Boost, queryTerm.Text);
weightedSpanTerm.AddPositionSpans(spanPositions);
weightedSpanTerm.SetPositionSensitive(true);
terms[queryTerm.Text] = weightedSpanTerm;
}
else
{
if (spanPositions.Count > 0)
{
weightedSpanTerm.AddPositionSpans(spanPositions);
}
}
}
}
}