//fieldname MUST be interned prior to this call
private static void GetTerms(Query query, System.Collections.Hashtable terms, bool prohibited, System.String fieldName)
{
try
{
if (query is BooleanQuery)
{
GetTermsFromBooleanQuery((BooleanQuery)query, terms, prohibited, fieldName);
}
else if (query is FilteredQuery)
{
GetTermsFromFilteredQuery((FilteredQuery)query, terms, prohibited, fieldName);
}
else
{
System.Collections.Hashtable nonWeightedTerms = new System.Collections.Hashtable();
query.ExtractTerms(nonWeightedTerms);
System.Collections.IDictionaryEnumerator iter = nonWeightedTerms.GetEnumerator();
while (iter.MoveNext())
{
Term term = (Term)iter.Value;
if ((fieldName == null) || (term.Field() == fieldName))
{
WeightedTerm temp = new WeightedTerm(query.GetBoost(), term.Text());
terms.Add(temp, temp);
}
}
}
}
catch (System.NotSupportedException ignore)
{
//this is non-fatal for our purposes
}
}
public QueryScorer(WeightedTerm[] weightedTerms)
{
termsToFind = new System.Collections.Hashtable();
for (int i = 0; i < weightedTerms.Length; i++)
{
WeightedTerm existingTerm = (WeightedTerm) termsToFind[weightedTerms[i].term];
if ((existingTerm == null) || (existingTerm.weight < weightedTerms[i].weight))
{
//if a term is defined more than once, always use the highest scoring weight
termsToFind[weightedTerms[i].term] = weightedTerms[i];
maxTermWeight = System.Math.Max(maxTermWeight, weightedTerms[i].GetWeight());
}
}
}
public QueryScorer(WeightedTerm[] weightedTerms)
{
termsToFind = new System.Collections.Hashtable();
for (int i = 0; i < weightedTerms.Length; i++)
{
WeightedTerm existingTerm = (WeightedTerm)termsToFind[weightedTerms[i].term];
if ((existingTerm == null) || (existingTerm.weight < weightedTerms[i].weight))
{
//if a term is defined more than once, always use the highest scoring weight
termsToFind[weightedTerms[i].term] = weightedTerms[i];
maxTermWeight = System.Math.Max(maxTermWeight, weightedTerms[i].GetWeight());
}
}
}
/// <summary> Extracts all terms texts of a given Query into an array of WeightedTerms
///
/// </summary>
/// <param name="query"> Query to extract term texts from
/// </param>
/// <param name="prohibited"><code>true</code> to extract "prohibited" terms, too
/// </param>
/// <param name="fieldName"> The fieldName used to filter query terms
/// </param>
/// <returns> an array of the terms used in a query, plus their weights.
/// </returns>
public static WeightedTerm[] GetTerms(Query query, bool prohibited, System.String fieldName)
{
System.Collections.Hashtable terms = new System.Collections.Hashtable();
if (fieldName != null)
{
fieldName = String.Intern(fieldName);
}
GetTerms(query, terms, prohibited, fieldName);
WeightedTerm[] result = new WeightedTerm[terms.Count];
int i = 0;
foreach (System.Object item in terms.Values)
{
result[i++] = (WeightedTerm)item;
}
return(result);
}
/* (non-Javadoc)
* @see Lucene.Net.Highlight.FragmentScorer#scoreToken(org.apache.lucene.analysis.Token)
*/
public virtual float GetTokenScore(Token token)
{
System.String termText = token.TermText();
WeightedTerm queryTerm = (WeightedTerm)termsToFind[termText];
if (queryTerm == null)
{
//not a query term - return
return(0);
}
//found a query term - is it unique in this doc?
if (!uniqueTermsInFragment.Contains(termText))
{
totalScore += queryTerm.GetWeight();
uniqueTermsInFragment.Add(termText, termText);
}
return(queryTerm.GetWeight());
}
/// <summary> Extracts all terms texts of a given Query into an array of WeightedTerms
///
/// </summary>
/// <param name="query"> Query to extract term texts from
/// </param>
/// <param name="prohibited"><code>true</code> to extract "prohibited" terms, too
/// </param>
/// <param name="fieldName"> The fieldName used to filter query terms
/// </param>
/// <returns> an array of the terms used in a query, plus their weights.
/// </returns>
public static WeightedTerm[] GetTerms(Query query, bool prohibited, System.String fieldName)
{
System.Collections.Hashtable terms = new System.Collections.Hashtable();
if (fieldName != null)
{
fieldName = String.Intern(fieldName);
}
GetTerms(query, terms, prohibited, fieldName);
WeightedTerm[] result = new WeightedTerm[terms.Count];
int i = 0;
foreach (System.Object item in terms.Values)
{
result[i++] = (WeightedTerm) item;
}
return (result);
}
//fieldname MUST be interned prior to this call
private static void GetTerms(Query query, System.Collections.Hashtable terms, bool prohibited, System.String fieldName)
{
try
{
if (query is BooleanQuery)
GetTermsFromBooleanQuery((BooleanQuery) query, terms, prohibited, fieldName);
else if (query is FilteredQuery)
GetTermsFromFilteredQuery((FilteredQuery) query, terms, prohibited, fieldName);
else
{
System.Collections.Hashtable nonWeightedTerms = new System.Collections.Hashtable();
query.ExtractTerms(nonWeightedTerms);
System.Collections.IDictionaryEnumerator iter = nonWeightedTerms.GetEnumerator();
while (iter.MoveNext())
{
Term term = (Term)iter.Value;
if ((fieldName == null) || (term.Field() == fieldName))
{
WeightedTerm temp = new WeightedTerm(query.GetBoost(), term.Text());
terms.Add(temp, temp);
}
}
}
}
catch (System.NotSupportedException ignore)
{
//this is non-fatal for our purposes
}
}
