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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "expressiontree.h"
#include "documentaccessornode.h"
#include "relevancenode.h"
#include "attributenode.h"
namespace search::expression {
using vespalib::Serializer;
using vespalib::Deserializer;
IMPLEMENT_EXPRESSIONNODE(ExpressionTree, ExpressionNode);
void
ExpressionTree::Configure::execute(vespalib::Identifiable &obj) {
ExpressionTree &e(static_cast<ExpressionTree &>(obj));
if (e.getRoot()) {
e.getRoot()->prepare(false);
}
e.prepare(false);
}
ExpressionTree::ExpressionTree() noexcept :
_root(),
_attributeNodes(),
_documentAccessorNodes(),
_relevanceNodes()
{ }
ExpressionTree::ExpressionTree(const ExpressionNode &root) :
_root(root.clone()),
_attributeNodes(),
_documentAccessorNodes(),
_relevanceNodes()
{
prepare(false);
}
namespace {
template<typename NODE>
class Gather : public vespalib::ObjectOperation, public vespalib::ObjectPredicate {
std::vector<NODE *> &_list;
public:
Gather(std::vector<NODE *> &list) : _list(list) { _list.clear(); }
void from(ExpressionNode &root) {
root.select(*this, *this);
}
private:
void execute(vespalib::Identifiable &obj) override {
_list.push_back(&static_cast<NODE &>(obj));
}
bool check(const vespalib::Identifiable &obj) const override {
return obj.inherits(NODE::classId);
}
};
template<typename NODE>
Gather<NODE>
gather(std::vector<NODE *> &list) {
return Gather<NODE>(list);
}
}
void
ExpressionTree::onPrepare(bool preserveAccurateTypes)
{
(void) preserveAccurateTypes;
if (_root) {
gather(_attributeNodes).from(*_root);
gather(_documentAccessorNodes).from(*_root);
gather(_relevanceNodes).from(*_root);
}
}
ExpressionTree::ExpressionTree(ExpressionNode::UP root) :
ExpressionNode(),
_root(std::move(root)),
_attributeNodes(),
_documentAccessorNodes(),
_relevanceNodes()
{
prepare(false);
}
ExpressionTree::ExpressionTree(const ExpressionTree & rhs) :
ExpressionNode(rhs),
_root(rhs._root),
_attributeNodes(),
_documentAccessorNodes(),
_relevanceNodes()
{
prepare(false);
}
ExpressionTree &
ExpressionTree::operator = (const ExpressionTree & rhs)
{
if (this != & rhs) {
ExpressionTree eTree(rhs);
swap(eTree);
}
return *this;
}
ExpressionTree &
ExpressionTree::operator = (ExpressionNode::UP rhs)
{
ExpressionTree eTree(std::move(rhs));
swap(eTree);
return *this;
}
void
ExpressionTree::swap(ExpressionTree & e)
{
std::swap(_root, e._root);
_attributeNodes.swap(e._attributeNodes);
_documentAccessorNodes.swap(e._documentAccessorNodes);
_relevanceNodes.swap(e._relevanceNodes);
}
ExpressionTree::~ExpressionTree() = default;
bool
ExpressionTree::execute(const document::Document & doc, HitRank rank) const
{
std::for_each(_documentAccessorNodes.cbegin(), _documentAccessorNodes.cend(), [&doc](DocumentAccessorNode * node) { node->setDoc(doc); });
std::for_each(_relevanceNodes.cbegin(), _relevanceNodes.cend(), [rank](RelevanceNode * node) { node->setRelevance(rank); });
return _root->execute();
}
bool
ExpressionTree::execute(DocId docId, HitRank rank) const
{
std::for_each(_attributeNodes.cbegin(), _attributeNodes.cend(), [docId](AttributeNode * node) { node->setDocId(docId); });
std::for_each(_relevanceNodes.cbegin(), _relevanceNodes.cend(), [rank](RelevanceNode * node) { node->setRelevance(rank); });
return _root->execute();
}
void
ExpressionTree::visitMembers(vespalib::ObjectVisitor &visitor) const
{
visit(visitor, "root", _root.get());
}
void
ExpressionTree::selectMembers(const vespalib::ObjectPredicate & predicate, vespalib::ObjectOperation & operation)
{
if (_root.get()) {
_root->select(predicate, operation);
}
}
Serializer &
operator << (Serializer & os, const ExpressionTree & et)
{
return os << et._root;
}
Deserializer &
operator >> (Deserializer & is, ExpressionTree & et)
{
is >> et._root;
et.prepare(false);
return is;
}
}
// this function was added by ../../forcelink.sh
void forcelink_file_searchlib_expression_expressiontree() {}
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