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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "same_element_search.h"
#include <vespa/searchlib/fef/termfieldmatchdata.h>
#include <vespa/vespalib/objects/visit.h>
#include <vespa/vespalib/objects/visit.hpp>
#include <algorithm>
#include <functional>
#include <cassert>
using TFMD = search::fef::TermFieldMatchData;
namespace search::queryeval {
bool
SameElementSearch::check_docid_match(uint32_t docid)
{
for (const auto &child: _children) {
if (!child->seek(docid)) {
return false;
}
}
return true;
}
void
SameElementSearch::fetch_matching_elements(uint32_t docid, std::vector<uint32_t> & elems)
{
_children.front()->getElementIds(docid, elems);
for (auto it(_children.begin() + 1); it != _children.end(); it++) {
(*it)->mergeElementIds(docid, elems);
}
}
bool
SameElementSearch::check_element_match(uint32_t docid)
{
_matchingElements.clear();
fetch_matching_elements(docid, _matchingElements);
return !_matchingElements.empty();
}
SameElementSearch::SameElementSearch(fef::TermFieldMatchData &tfmd,
fef::MatchData::UP md,
std::vector<ElementIterator::UP> children,
bool strict)
: _tfmd(tfmd),
_md(std::move(md)),
_children(std::move(children)),
_strict(strict)
{
_tfmd.reset(0);
assert(!_children.empty());
}
void
SameElementSearch::initRange(uint32_t begin_id, uint32_t end_id)
{
SearchIterator::initRange(begin_id, end_id);
for (const auto &child: _children) {
child->initRange(begin_id, end_id);
}
}
void
SameElementSearch::doSeek(uint32_t docid) {
if (check_docid_match(docid) && check_element_match(docid)) {
setDocId(docid);
} else if (_strict) {
docid = std::max(docid + 1, _children[0]->getDocId());
while (!isAtEnd(docid)) {
if (check_docid_match(docid) && check_element_match(docid)) {
setDocId(docid);
return;
}
docid = std::max(docid + 1, _children[0]->getDocId());
}
setAtEnd();
}
}
void
SameElementSearch::doUnpack(uint32_t docid)
{
_tfmd.resetOnlyDocId(docid);
}
void
SameElementSearch::visitMembers(vespalib::ObjectVisitor &visitor) const
{
SearchIterator::visitMembers(visitor);
visit(visitor, "children", _children);
visit(visitor, "strict", _strict);
}
void
SameElementSearch::find_matching_elements(uint32_t docid, std::vector<uint32_t> &dst)
{
if (check_docid_match(docid)) {
fetch_matching_elements(docid, dst);
}
}
}
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