public TermWeight(TermQuery enclosingInstance, Searcher searcher)
{
InitBlock(enclosingInstance);
this.similarity = Enclosing_Instance.GetSimilarity(searcher);
idfExp = similarity.IdfExplain(Enclosing_Instance.term, searcher);
idf = idfExp.Idf;
}
public static Query CreateQuery(string name, string type, object value) {
Query query;
switch (type) {
case "byte":
query = NumericRangeQuery.NewIntRange(name, Convert.ToInt32(value), Convert.ToInt32(value), true, true);
break;
case "int16":
query = NumericRangeQuery.NewIntRange(name, Convert.ToInt32(value), Convert.ToInt32(value), true, true);
break;
case "int":
var intValue = (int)value;
query = NumericRangeQuery.NewIntRange(name, intValue, intValue, true, true);
break;
case "int32":
var int32Value = (int)value;
query = NumericRangeQuery.NewIntRange(name, int32Value, int32Value, true, true);
break;
case "int64":
var int64Value = (long)value;
query = NumericRangeQuery.NewLongRange(name, int64Value, int64Value, true, true);
break;
case "long":
var longValue = (long)value;
query = NumericRangeQuery.NewLongRange(name, longValue, longValue, true, true);
break;
case "double":
var doubleValue = (double)value;
query = NumericRangeQuery.NewDoubleRange(name, doubleValue, doubleValue, true, true);
break;
case "float":
var floatValue = (float)value;
query = NumericRangeQuery.NewFloatRange(name, floatValue, floatValue, true, true);
break;
case "datetime":
var datetimeValue = ((DateTime)value).Ticks;
query = NumericRangeQuery.NewLongRange(name, datetimeValue, datetimeValue, true, true);
break;
case "string":
query = new TermQuery(new Term((string)value));
break;
case "byte[]":
query = new TermQuery(new Term(Common.BytesToHexString((byte[])value)));
break;
case "rowversion":
query = new TermQuery(new Term(Common.BytesToHexString((byte[])value)));
break;
default:
query = new TermQuery(new Term(name, Convert.ToString(value)));
break;
}
return query;
}
public override int NextBatchId(string processName) {
if (!TflBatchRecordsExist(processName)) {
return 1;
}
using (var searcher = LuceneSearcherFactory.Create(this, TflBatchEntity(processName))) {
var query = new TermQuery(new Term("process", processName));
var sort = new Sort(new SortField("id", SortField.INT, true));
var hits = searcher.Search(query, null, 1, sort);
if (hits.TotalHits <= 0)
return 1;
var doc = searcher.Doc(0);
return Convert.ToInt32(doc.GetField("id").StringValue) + 1;
}
}
public override Query Rewrite(IndexReader reader, MultiTermQuery query)
{
// Get the enum and start visiting terms. If we
// exhaust the enum before hitting either of the
// cutoffs, we use ConstantBooleanQueryRewrite; else,
// ConstantFilterRewrite:
ICollection<Term> pendingTerms = new List<Term>();
int docCountCutoff = (int) ((docCountPercent / 100.0) * reader.MaxDoc);
int termCountLimit = System.Math.Min(BooleanQuery.MaxClauseCount, termCountCutoff);
int docVisitCount = 0;
FilteredTermEnum enumerator = query.GetEnum(reader);
try
{
while (true)
{
Term t = enumerator.Term;
if (t != null)
{
pendingTerms.Add(t);
// Loading the TermInfo from the terms dict here
// should not be costly, because 1) the
// query/filter will load the TermInfo when it
// runs, and 2) the terms dict has a cache:
docVisitCount += reader.DocFreq(t);
}
if (pendingTerms.Count >= termCountLimit || docVisitCount >= docCountCutoff)
{
// Too many terms -- make a filter.
Query result = new ConstantScoreQuery(new MultiTermQueryWrapperFilter<MultiTermQuery>(query));
result.Boost = query.Boost;
return result;
}
else if (!enumerator.Next())
{
// Enumeration is done, and we hit a small
// enough number of terms & docs -- just make a
// BooleanQuery, now
BooleanQuery bq = new BooleanQuery(true);
foreach(Term term in pendingTerms)
{
TermQuery tq = new TermQuery(term);
bq.Add(tq, Occur.SHOULD);
}
// Strip scores
Query result = new ConstantScoreQuery(new QueryWrapperFilter(bq));
result.Boost = query.Boost;
query.IncTotalNumberOfTerms(pendingTerms.Count);
return result;
}
}
}
finally
{
enumerator.Close();
}
}
public override Query Rewrite(IndexReader reader, MultiTermQuery query)
{
FilteredTermEnum enumerator = query.GetEnum(reader);
BooleanQuery result = new BooleanQuery(true);
int count = 0;
try
{
do
{
Term t = enumerator.Term;
if (t != null)
{
TermQuery tq = new TermQuery(t); // found a match
tq.Boost = query.Boost * enumerator.Difference(); // set the boost
result.Add(tq, Occur.SHOULD); // add to query
count++;
}
}
while (enumerator.Next());
}
finally
{
enumerator.Close();
}
query.IncTotalNumberOfTerms(count);
return result;
}
public override Query Rewrite(IndexReader reader)
{
if (!termLongEnough)
{
// can only match if it's exact
return(new TermQuery(Term));
}
int maxSize = BooleanQuery.MaxClauseCount;
// TODO: Java uses a PriorityQueue. Using Linq, we can emulate it,
// however it's considerable slower than the java counterpart.
// this should be a temporary thing, fixed before release
SortedList <ScoreTerm, ScoreTerm> stQueue = new SortedList <ScoreTerm, ScoreTerm>();
FilteredTermEnum enumerator = GetEnum(reader);
try
{
ScoreTerm st = new ScoreTerm();
do
{
Term t = enumerator.Term;
if (t == null)
{
break;
}
float score = enumerator.Difference();
//ignore uncompetetive hits
if (stQueue.Count >= maxSize && score <= stQueue.Keys.First().score)
{
continue;
}
// add new entry in PQ
st.term = t;
st.score = score;
stQueue.Add(st, st);
// possibly drop entries from queue
if (stQueue.Count > maxSize)
{
st = stQueue.Keys.First();
stQueue.Remove(st);
}
else
{
st = new ScoreTerm();
}
}while (enumerator.Next());
}
finally
{
enumerator.Close();
}
BooleanQuery query = new BooleanQuery(true);
foreach (ScoreTerm st in stQueue.Keys)
{
TermQuery tq = new TermQuery(st.term); // found a match
tq.Boost = Boost * st.score; // set the boost
query.Add(tq, Occur.SHOULD); // add to query
}
return(query);
}
private void InitBlock(TermQuery enclosingInstance)
{
this.enclosingInstance = enclosingInstance;
}
public override Weight CreateWeight(Searcher searcher)
{
if (terms.Count == 1)
{
// optimize one-term case
Term term = terms[0];
Query termQuery = new TermQuery(term);
termQuery.Boost = Boost;
return termQuery.CreateWeight(searcher);
}
return new PhraseWeight(this, searcher);
}
private void InitBlock(TermQuery enclosingInstance)
{
this.enclosingInstance = enclosingInstance;
}
