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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/attribute/iattributecontext.h>
#include <vespa/searchlib/common/serialnum.h>
#include <vespa/searchlib/index/i_field_length_inspector.h>
#include <vespa/searchlib/query/tree/node.h>
#include <vespa/searchlib/queryeval/field_spec.h>
#include <vespa/searchlib/queryeval/irequestcontext.h>
#include <vespa/searchlib/queryeval/searchable.h>
#include <vespa/searchlib/util/searchable_stats.h>
namespace searchcorespi {
class IndexSearchableVisitor;
/**
* Abstract class extended by components to expose content that can be
* searched by a query term. A IndexSearchable component supports searching
* in one or more named fields. The Blueprint created by a Searchable
* is an intermediate query representation that is later used to
* create the actual search iterators used to produce matches.
*
* The class is a specialized version of search::queryeval::Searchable
* that let the components access a per query attribute context that expose
* attribute vectors that can be utilized during query evaluation.
**/
class IndexSearchable : public search::queryeval::Searchable,
public search::index::IFieldLengthInspector {
protected:
using IRequestContext = search::queryeval::IRequestContext;
using FieldSpec = search::queryeval::FieldSpec;
using FieldSpecList = search::queryeval::FieldSpecList;
using Node = search::query::Node;
using IAttributeContext = search::attribute::IAttributeContext;
public:
using SP = std::shared_ptr<IndexSearchable>;
/**
* Returns the searchable stats for this index searchable.
*/
virtual search::SearchableStats getSearchableStats() const = 0;
/**
* Returns the serial number for this index searchable.
*/
virtual search::SerialNum getSerialNum() const = 0;
/**
* Calls visitor with properly downcasted argument to differentiate
* between different types of indexes (disk index or memory index).
*/
virtual void accept(IndexSearchableVisitor &visitor) const = 0;
};
} // namespace searchcorespi
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