PayloadNearQuery.h

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// Copyright (c) 2009-2014 Alan Wright. All rights reserved.
// Distributable under the terms of either the Apache License (Version 2.0)
// or the GNU Lesser General Public License.
 
#ifndef PAYLOADNEARQUERY_H
#define PAYLOADNEARQUERY_H
 
#include "SpanNearQuery.h"
#include "SpanWeight.h"
#include "SpanScorer.h"
 
namespace Lucene {

class LPPAPI PayloadNearQuery : public SpanNearQuery {
public:
    PayloadNearQuery(Collection<SpanQueryPtr> clauses, int32_t slop, bool inOrder);
    PayloadNearQuery(Collection<SpanQueryPtr> clauses, int32_t slop, bool inOrder, const PayloadFunctionPtr& function);
 
    virtual ~PayloadNearQuery();
 
    LUCENE_CLASS(PayloadNearQuery);
 
protected:
    String fieldName;
    PayloadFunctionPtr function;
 
public:
    using SpanNearQuery::toString;
 
    virtual WeightPtr createWeight(const SearcherPtr& searcher);
 
    virtual LuceneObjectPtr clone(const LuceneObjectPtr& other = LuceneObjectPtr());
    virtual String toString(const String& field);
    virtual bool equals(const LuceneObjectPtr& other);
    virtual int32_t hashCode();
 
    friend class PayloadNearSpanWeight;
    friend class PayloadNearSpanScorer;
};
 
class LPPAPI PayloadNearSpanWeight : public SpanWeight {
public:
    PayloadNearSpanWeight(const SpanQueryPtr& query, const SearcherPtr& searcher);
    virtual ~PayloadNearSpanWeight();
 
    LUCENE_CLASS(PayloadNearSpanWeight);
 
public:
    virtual ScorerPtr scorer(const IndexReaderPtr& reader, bool scoreDocsInOrder, bool topScorer);
};
 
class LPPAPI PayloadNearSpanScorer : public SpanScorer {
public:
    PayloadNearSpanScorer(const SpansPtr& spans, const WeightPtr& weight, const SimilarityPtr& similarity, ByteArray norms);
    virtual ~PayloadNearSpanScorer();
 
    LUCENE_CLASS(PayloadNearSpanScorer);
 
public:
    SpansPtr spans;
    SimilarityPtr similarity;
 
protected:
    double payloadScore;
    int32_t payloadsSeen;
 
public:
    void getPayloads(Collection<SpansPtr> subSpans);
 
    virtual double score();
 
protected:
    void processPayloads(Collection<ByteArray> payLoads, int32_t start, int32_t end);
 
    virtual bool setFreqCurrentDoc();
    virtual ExplanationPtr explain(int32_t doc);
};
 
}
 
#endif