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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/searchcommon/common/range.h>
#include <vespa/vespalib/stllike/string.h>
#include <memory>
namespace search::fef { class TermFieldMatchData; }
namespace search::queryeval {
class SearchIterator;
class ExecuteInfo;
}
namespace search { class QueryTermUCS4; }
namespace search::attribute {
class ISearchContext {
public:
using UP = std::unique_ptr<ISearchContext>;
using DocId = uint32_t;
private:
virtual int32_t onFind(DocId docId, int32_t elementId, int32_t &weight) const = 0;
virtual int32_t onFind(DocId docId, int32_t elementId) const = 0;
public:
virtual ~ISearchContext() = default;
virtual unsigned int approximateHits() const = 0;
/**
* Creates an attribute search iterator associated with this
* search context.
*
* @return attribute search iterator
*
* @param matchData the attribute match data used when
* unpacking data for a hit
*
* @param strict whether the iterator should be strict or not
**/
virtual std::unique_ptr<queryeval::SearchIterator>
createIterator(fef::TermFieldMatchData *matchData, bool strict) = 0;
/*
* Create temporary posting lists.
* Should be called before createIterator() is called.
*/
virtual void fetchPostings(const queryeval::ExecuteInfo &execInfo) = 0;
virtual bool valid() const = 0;
virtual Int64Range getAsIntegerTerm() const = 0;
virtual DoubleRange getAsDoubleTerm() const = 0;
virtual const QueryTermUCS4 * queryTerm() const = 0;
virtual const vespalib::string &attributeName() const = 0;
int32_t find(DocId docId, int32_t elementId, int32_t &weight) const { return onFind(docId, elementId, weight); }
int32_t find(DocId docId, int32_t elementId) const { return onFind(docId, elementId); }
template<typename SC>
static bool matches(const SC & sc, DocId docId, int32_t &weight) {
weight = 0;
int32_t oneWeight(0);
int32_t firstId = sc.find(docId, 0, oneWeight);
for (int32_t id(firstId); id >= 0; id = sc.find(docId, id + 1, oneWeight)) {
weight += oneWeight;
}
return firstId >= 0;
}
bool matches(DocId docId, int32_t &weight) const { return matches(*this, docId, weight); }
bool matches(DocId doc) const { return find(doc, 0) >= 0; }
/*
* Committed docid limit on attribute vector when search context was
* created.
*/
virtual uint32_t get_committed_docid_limit() const noexcept = 0;
};
}
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