--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/searchengine/oss/cl/clucene/src/clucene/highlighter/QueryScorer.h	Fri Jun 11 14:43:47 2010 +0300
@@ -0,0 +1,114 @@
+/**
+ * Copyright 2002-2004 The Apache Software Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _lucene_search_highlighter_queryscorer_
+#define _lucene_search_highlighter_queryscorer_
+
+#if defined(_LUCENE_PRAGMA_ONCE)
+# pragma once
+#endif
+
+#include <math.h> // float_t
+#include "CLucene/analysis/AnalysisHeader.h"
+#include "CLucene/search/SearchHeader.h"
+#include "CLucene/index/IndexReader.h"
+#include "CLucene/highlighter/WeightedTerm.h"
+#include "CLucene/highlighter/HighlightScorer.h"
+#include "CLucene/highlighter/QueryTermExtractor.h"
+#include "CLucene/highlighter/TextFragment.h"
+
+CL_NS_DEF2(search,highlight)
+
+/**
+ * {@link Scorer} implementation which scores text fragments by the number of unique query terms found.
+ * This class uses the {@link QueryTermExtractor} class to process determine the query terms and 
+ * their boosts to be used. 
+ */
+//TODO: provide option to boost score of fragments near beginning of document 
+// based on fragment.getFragNum()
+class QueryScorer : public HighlightScorer
+{
+private:
+	TextFragment * _currentTextFragment;
+	CL_NS(util)::CLHashSet<const TCHAR*,
+		CL_NS(util)::Compare::TChar,
+		CL_NS(util)::Deletor::tcArray> _uniqueTermsInFragment;
+	double _totalScore;
+	double _maxTermWeight;
+	CL_NS(util)::LHashMap<const TCHAR*, const WeightedTerm *,
+		CL_NS(util)::Compare::TChar,
+		CL_NS(util)::Equals::TChar,
+		CL_NS(util)::Deletor::tcArray,
+		CL_NS(util)::Deletor::Object<const WeightedTerm> > _termsToFind;
+
+public:
+	/**
+	* 
+	* @param query a Lucene query (ideally rewritten using query.rewrite 
+	* before being passed to this class and the searcher)
+	*/
+	QueryScorer(const Query * query);
+
+	/**
+	* 
+	* @param query a Lucene query (ideally rewritten using query.rewrite 
+	* before being passed to this class and the searcher)
+	* @param reader used to compute IDF which can be used to a) score selected fragments better 
+	* b) use graded highlights eg set font color intensity
+	* @param fieldName the field on which Inverse Document Frequency (IDF) calculations are based
+	*/
+	QueryScorer(const Query* query, CL_NS(index)::IndexReader* reader, const TCHAR* fieldName);
+
+	QueryScorer(WeightedTerm** weightedTerms);
+
+	~QueryScorer();
+
+	/* (non-Javadoc)
+	 * @see org.apache.lucene.search.highlight.FragmentScorer#startFragment(org.apache.lucene.search.highlight.TextFragment)
+	 */
+	void startFragment(TextFragment* newFragment);
+	
+	/* (non-Javadoc)
+	 * @see org.apache.lucene.search.highlight.FragmentScorer#scoreToken(org.apache.lucene.analysis.Token)
+	 */
+	float_t getTokenScore(CL_NS(analysis)::Token * token);
+	
+	/* (non-Javadoc)
+	 * @see org.apache.lucene.search.highlight.FragmentScorer#endFragment(org.apache.lucene.search.highlight.TextFragment)
+	 */
+	float_t getFragmentScore();
+
+	/* (non-Javadoc)
+	 * @see org.apache.lucene.search.highlight.FragmentScorer#allFragmentsProcessed()
+	 */
+	void allFragmentsProcessed();
+
+	/**
+	 * 
+	 * @return The highest weighted term (useful for passing to GradientFormatter to set
+	 * top end of coloring scale.  
+		*/
+	float_t getMaxTermWeight();
+
+private:
+	void initialize(WeightedTerm** weightedTerms);
+
+};
+
+CL_NS_END2
+
+#endif
+