beedb/include/plan/logical/node/node_interface.h

196 lines
5.4 KiB
C++

/*------------------------------------------------------------------------------*
* Architecture & Implementation of DBMS *
*------------------------------------------------------------------------------*
* Copyright 2022 Databases and Information Systems Group TU Dortmund *
* Visit us at *
* http://dbis.cs.tu-dortmund.de/cms/en/home/ *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR *
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
* OTHER DEALINGS IN THE SOFTWARE. *
* *
* Authors: *
* Maximilian Berens <maximilian.berens@tu-dortmund.de> *
* Roland Kühn <roland.kuehn@cs.tu-dortmund.de> *
* Jan Mühlig <jan.muehlig@tu-dortmund.de> *
*------------------------------------------------------------------------------*
*/
#pragma once
#include "schema.h"
#include "table.h"
#include <expression/operation.h>
#include <memory>
#include <nlohmann/json.hpp>
#include <sstream>
#include <string>
namespace beedb::plan::logical
{
class NodeInterface
{
public:
explicit NodeInterface(std::string &&name) : _name(std::move(name))
{
}
virtual ~NodeInterface() = default;
[[nodiscard]] virtual bool is_unary() const
{
return false;
}
[[nodiscard]] virtual bool is_binary() const
{
return false;
}
[[nodiscard]] const std::string &name() const
{
return _name;
}
virtual const Schema &check_and_emit_schema(TableMap &tables) = 0;
[[nodiscard]] virtual const Schema &schema() const = 0;
[[nodiscard]] virtual nlohmann::json to_json() const
{
auto json = nlohmann::json{};
json["name"] = _name;
std::stringstream schema_stream;
for (auto i = 0u; i < schema().size(); ++i)
{
const auto &term = schema()[i];
if (i > 0)
{
schema_stream << ",";
}
schema_stream << static_cast<std::string>(term);
}
schema_stream << std::flush;
json["output"] = schema_stream.str();
return json;
}
private:
std::string _name;
};
class UnaryNode : public NodeInterface
{
public:
explicit UnaryNode(std::string &&name) : NodeInterface(std::move(name))
{
}
~UnaryNode() override = default;
[[nodiscard]] bool is_unary() const override
{
return true;
}
void child(std::unique_ptr<NodeInterface> &&child)
{
_child = std::move(child);
}
[[nodiscard]] const std::unique_ptr<NodeInterface> &child() const
{
return _child;
}
[[nodiscard]] std::unique_ptr<NodeInterface> &child()
{
return _child;
}
[[nodiscard]] nlohmann::json to_json() const override
{
auto json = NodeInterface::to_json();
json["childs"][0] = _child->to_json();
return json;
}
private:
std::unique_ptr<NodeInterface> _child{nullptr};
};
class BinaryNode : public NodeInterface
{
public:
explicit BinaryNode(std::string &&name) : NodeInterface(std::move(name))
{
}
~BinaryNode() override = default;
[[nodiscard]] bool is_binary() const override
{
return true;
}
void left_child(std::unique_ptr<NodeInterface> &&child)
{
_left_child = std::move(child);
}
[[nodiscard]] const std::unique_ptr<NodeInterface> &left_child() const
{
return _left_child;
}
[[nodiscard]] std::unique_ptr<NodeInterface> &left_child()
{
return _left_child;
}
void right_child(std::unique_ptr<NodeInterface> &&child)
{
_right_child = std::move(child);
}
[[nodiscard]] const std::unique_ptr<NodeInterface> &right_child() const
{
return _right_child;
}
[[nodiscard]] std::unique_ptr<NodeInterface> &right_child()
{
return _right_child;
}
[[nodiscard]] nlohmann::json to_json() const override
{
auto json = NodeInterface::to_json();
json["childs"][0] = _left_child->to_json();
json["childs"][1] = _right_child->to_json();
return json;
}
private:
std::unique_ptr<NodeInterface> _left_child{nullptr};
std::unique_ptr<NodeInterface> _right_child{nullptr};
};
class NotSchematizedNode : public NodeInterface
{
public:
explicit NotSchematizedNode(std::string &&name) : NodeInterface(std::move(name))
{
}
~NotSchematizedNode() override = default;
const Schema &check_and_emit_schema(TableMap &) override
{
return _schema;
}
[[nodiscard]] const Schema &schema() const override
{
return _schema;
}
private:
Schema _schema;
};
} // namespace beedb::plan::logical