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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 "integer_term_vector.h"
#include "intermediatenodes.h"
#include "querybuilder.h"
#include "queryvisitor.h"
#include "string_term_vector.h"
#include "termnodes.h"
namespace search::query {
/**
* Creates a new query tree based on an existing one. The traits class
* specifies what concrete types the query tree classes should have.
*/
template <class NodeTypes>
class QueryReplicator : private QueryVisitor {
QueryBuilder<NodeTypes> _builder;
public:
Node::UP replicate(const Node &node) {
// The visitor doesn't deal with const nodes. However, we are
// not changing the node, so we can safely remove the const.
const_cast<Node &>(node).accept(*this);
return _builder.build();
}
private:
void visitNodes(const std::vector<Node *> &nodes) {
for (size_t i = 0; i < nodes.size(); ++i) {
nodes[i]->accept(*this);
}
}
void visit(And &node) override {
_builder.addAnd(node.getChildren().size());
visitNodes(node.getChildren());
}
void visit(AndNot &node) override {
_builder.addAndNot(node.getChildren().size());
visitNodes(node.getChildren());
}
void visit(WeakAnd &node) override {
_builder.addWeakAnd(node.getChildren().size(), node.getTargetNumHits(), node.getView());
visitNodes(node.getChildren());
}
void visit(Equiv &node) override {
_builder.addEquiv(node.getChildren().size(), node.getId(), node.getWeight());
visitNodes(node.getChildren());
}
void visit(Near &node) override {
_builder.addNear(node.getChildren().size(), node.getDistance());
visitNodes(node.getChildren());
}
void visit(ONear &node) override {
_builder.addONear(node.getChildren().size(), node.getDistance());
visitNodes(node.getChildren());
}
void visit(Or &node) override {
_builder.addOr(node.getChildren().size());
visitNodes(node.getChildren());
}
void visit(Phrase &node) override {
replicate(node, _builder.addPhrase(node.getChildren().size(), node.getView(),
node.getId(), node.getWeight()).set_expensive(node.is_expensive()));
visitNodes(node.getChildren());
}
void visit(SameElement &node) override {
_builder.addSameElement(node.getChildren().size(), node.getView(),
node.getId(), node.getWeight()).set_expensive(node.is_expensive());
visitNodes(node.getChildren());
}
void replicateMultiTerm(const MultiTerm &original, MultiTerm & replica) {
if (original.getType() == MultiTerm::Type::STRING) {
for (uint32_t i(0); i < original.getNumTerms(); i++) {
auto v = original.getAsString(i);
replica.addTerm(v.first, v.second);
}
} else if (original.getType() == MultiTerm::Type::INTEGER) {
for (uint32_t i(0); i < original.getNumTerms(); i++) {
auto v = original.getAsInteger(i);
replica.addTerm(v.first, v.second);
}
} else {
assert (original.getType() == MultiTerm::Type::UNKNOWN);
assert (original.getNumTerms() == 0);
}
}
void visit(WeightedSetTerm &node) override {
auto & replica = _builder.addWeightedSetTerm(node.getNumTerms(), node.getView(), node.getId(), node.getWeight());
replicate(node, replica);
replicateMultiTerm(node, replica);
}
void visit(DotProduct &node) override {
auto & replica = _builder.addDotProduct(node.getNumTerms(), node.getView(), node.getId(), node.getWeight());
replicate(node, replica);
replicateMultiTerm(node, replica);
}
void visit(WandTerm &node) override {
auto & replica = _builder.addWandTerm(node.getNumTerms(), node.getView(), node.getId(), node.getWeight(),
node.getTargetNumHits(),
node.getScoreThreshold(),
node.getThresholdBoostFactor());
replicate(node, replica);
replicateMultiTerm(node, replica);
}
void visit(Rank &node) override {
_builder.addRank(node.getChildren().size());
visitNodes(node.getChildren());
}
void replicate(const Term &original, Term &replica) {
replica.setStateFrom(original);
}
void visit(NumberTerm &node) override {
replicate(node, _builder.addNumberTerm(
node.getTerm(), node.getView(),
node.getId(), node.getWeight()));
}
void visit(LocationTerm &node) override {
replicate(node,_builder.addLocationTerm(
node.getTerm(), node.getView(),
node.getId(), node.getWeight()));
}
void visit(PrefixTerm &node) override {
replicate(node, _builder.addPrefixTerm(
node.getTerm(), node.getView(),
node.getId(), node.getWeight()));
}
void visit(RangeTerm &node) override {
replicate(node, _builder.addRangeTerm(
node.getTerm(), node.getView(),
node.getId(), node.getWeight()));
}
void visit(StringTerm &node) override {
replicate(node, _builder.addStringTerm(
node.getTerm(), node.getView(),
node.getId(), node.getWeight()));
}
void visit(SubstringTerm &node) override {
replicate(node, _builder.addSubstringTerm(
node.getTerm(), node.getView(),
node.getId(), node.getWeight()));
}
void visit(SuffixTerm &node) override {
replicate(node, _builder.addSuffixTerm(
node.getTerm(), node.getView(),
node.getId(), node.getWeight()));
}
void visit(PredicateQuery &node) override {
replicate(node, _builder.addPredicateQuery(
std::make_unique<PredicateQueryTerm>(*node.getTerm()),
node.getView(), node.getId(), node.getWeight()));
}
void visit(RegExpTerm &node) override {
replicate(node, _builder.addRegExpTerm(
node.getTerm(), node.getView(),
node.getId(), node.getWeight()));
}
void visit(NearestNeighborTerm &node) override {
replicate(node, _builder.add_nearest_neighbor_term(node.get_query_tensor_name(), node.getView(),
node.getId(), node.getWeight(), node.get_target_num_hits(),
node.get_allow_approximate(), node.get_explore_additional_hits(),
node.get_distance_threshold()));
}
void visit(TrueQueryNode &) override {
_builder.add_true_node();
}
void visit(FalseQueryNode &) override {
_builder.add_false_node();
}
void visit(FuzzyTerm &node) override {
replicate(node, _builder.addFuzzyTerm(
node.getTerm(), node.getView(),
node.getId(), node.getWeight(),
node.getMaxEditDistance(), node.getPrefixLength()));
}
std::unique_ptr<TermVector> replicate_subterms(const InTerm& original) {
uint32_t num_terms = original.getNumTerms();
if (original.getType() == MultiTerm::Type::STRING) {
auto replica = std::make_unique<StringTermVector>(num_terms);
for (uint32_t i(0); i < num_terms; i++) {
auto v = original.getAsString(i);
replica->addTerm(v.first);
}
return replica;
} else if (original.getType() == MultiTerm::Type::INTEGER) {
auto replica = std::make_unique<IntegerTermVector>(num_terms);
for (uint32_t i(0); i < original.getNumTerms(); i++) {
auto v = original.getAsInteger(i);
replica->addTerm(v.first);
}
return replica;
} else {
abort();
}
}
void visit(InTerm& node) override {
replicate(node, _builder.add_in_term(replicate_subterms(node), node.getType(), node.getView(), node.getId(), node.getWeight()));
}
};
}
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