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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "searchiterator.h"
#include <vespa/searchlib/fef/termfieldmatchdataarray.h>
namespace search::queryeval {
/**
* A term iterator wrapper used to hide detailed match
* information. Wrapping a term iterator with an instance of this
* class will ensure that the unpack method will only disclose whether
* we found a match or not. This is done by intercepting calls to the
* doUnpack method. The doSeek method will be forwarded to ensure we
* match the same set of documents.
**/
class BooleanMatchIteratorWrapper : public SearchIterator
{
private:
SearchIterator::UP _search;
fef::TermFieldMatchData *_tfmdp;
protected:
void doSeek(uint32_t docid) override;
void doUnpack(uint32_t docid) override;
Trinary is_strict() const override { return _search->is_strict(); }
void initRange(uint32_t beginid, uint32_t endid) override {
SearchIterator::initRange(beginid, endid);
_search->initRange(beginid, endid);
setDocId(_search->getDocId());
}
public:
/**
* Create a wrapper for the given search using the given term
* match data. This object will take ownership of the given search
* and delete it in the destructor. The given search must be a
* term iterator that is using the given term match data to store
* its matching details during unpack. The given term match data
* is expected to be stored inside a match data object and as such
* be managed outside of this object. The iterator will fill in
* match/non-match information only, and only if the given array
* holds exactly one reference.
*
* @param search internal search, must be a term iterator
* @param match term match data used by the internal iterator
**/
BooleanMatchIteratorWrapper(SearchIterator::UP search, const fef::TermFieldMatchDataArray &matchData);
void visitMembers(vespalib::ObjectVisitor &visitor) const override;
};
}
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