192 lines
7.1 KiB
C++
192 lines
7.1 KiB
C++
#pragma once
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#include "exception.h"
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#include "parser.h"
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#include "settings.h"
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#include <variant>
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#include <vector>
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namespace usql {
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struct ColValue {
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virtual bool isNull() const { return false; };
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virtual ColumnType getColType() const = 0;
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virtual long getIntegerValue() const = 0;
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virtual double getDoubleValue() const = 0;
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virtual std::string getStringValue() const = 0;
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virtual std::string getCsvStringValue() const { return getStringValue(); };
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virtual long getDateValue() const = 0;
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virtual bool getBoolValue() const = 0;
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virtual int compare(ColValue &other) const = 0;
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virtual ~ColValue() = default;
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};
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struct ColNullValue : ColValue {
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bool isNull() const override { return true; };
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ColumnType getColType() const override { throw Exception("getColType not supported on ColNullValue"); }
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long getIntegerValue() const override { throw Exception("getIntegerValue not supported on ColNullValue"); };
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double getDoubleValue() const override { throw Exception("getDoubleValue not supported on ColNullValue"); };
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std::string getStringValue() const override { return "null"; };
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long getDateValue() const override { throw Exception("getDateValue not supported on ColNullValue"); };
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bool getBoolValue() const override { throw Exception("getDateValue not supported on ColNullValue"); };
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int compare(ColValue &other) const override;
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~ColNullValue() override = default;
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};
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struct ColIntegerValue : ColValue {
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explicit ColIntegerValue(long value) : m_integer(value) {};
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ColIntegerValue(const ColIntegerValue &other) : m_integer(other.m_integer) {};
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ColumnType getColType() const override { return ColumnType::integer_type; };
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long getIntegerValue() const override { return m_integer; };
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double getDoubleValue() const override { return (double) m_integer; };
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std::string getStringValue() const override { return std::to_string(m_integer); };
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long getDateValue() const override { return m_integer; };
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bool getBoolValue() const override { throw Exception("Not supported on ColIntegerValue"); };
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int compare(ColValue &other) const override;
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~ColIntegerValue() override = default;
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long m_integer;
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};
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struct ColDoubleValue : ColValue {
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explicit ColDoubleValue(double value) : m_double(value) {};
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ColDoubleValue(const ColDoubleValue &other) : m_double(other.m_double) {}
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ColumnType getColType() const override { return ColumnType::float_type; };
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long getIntegerValue() const override { return (long) m_double; };
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double getDoubleValue() const override { return m_double; };
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std::string getStringValue() const override { return Settings::double_to_string(m_double); };
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long getDateValue() const override { return (long) m_double; };
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bool getBoolValue() const override { throw Exception("Not supported on ColDoubleValue"); };
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int compare(ColValue &other) const override;
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~ColDoubleValue() override = default;
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double m_double;
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};
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struct ColStringValue : ColValue {
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explicit ColStringValue(const std::string &value) : m_string(std::make_unique<std::string>(value)) {};
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ColStringValue(const ColStringValue &other) : m_string(std::make_unique<std::string>(*other.m_string)) {};
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ColStringValue & operator=(ColStringValue other);
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ColumnType getColType() const override { return ColumnType::varchar_type; };
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long getIntegerValue() const override { return std::stoi(*m_string); };
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double getDoubleValue() const override { return std::stod(*m_string); };
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std::string getStringValue() const override { return *m_string; };
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std::string getCsvStringValue() const override;;
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long getDateValue() const override { return std::stoi(*m_string); };
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bool getBoolValue() const override { throw Exception("Not supported on ColStringValue"); };
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int compare(ColValue &other) const override;
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std::unique_ptr<std::string> m_string;
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};
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struct ColDateValue : ColValue {
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explicit ColDateValue(long value) : m_date(value) {};
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ColDateValue(const ColDateValue &other) : m_date(other.m_date) {};
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ColumnType getColType() const override { return ColumnType::date_type; };
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long getIntegerValue() const override { return m_date; };
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double getDoubleValue() const override { return (double) m_date; };
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std::string getStringValue() const override { return Settings::date_to_string(m_date); };
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long getDateValue() const override { return m_date; };
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bool getBoolValue() const override { throw Exception("Not supported on ColDateValue"); };
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int compare(ColValue &other) const override;
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~ColDateValue() override = default;
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long m_date; // seconds since epoch for now
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};
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struct ColBooleanValue : ColValue {
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explicit ColBooleanValue(bool value) : m_bool(value) {};
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ColBooleanValue(const ColBooleanValue &other) : m_bool(other.m_bool) {};
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ColumnType getColType() const override { return ColumnType::bool_type; };
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long getIntegerValue() const override { return (long) m_bool; };
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double getDoubleValue() const override { return (double) m_bool; };
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std::string getStringValue() const override { return m_bool ? "Y" : "N"; };
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long getDateValue() const override { throw Exception("Not supported on ColBooleanValue"); };
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bool getBoolValue() const override { return m_bool; };
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int compare(ColValue &other) const override;
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~ColBooleanValue() override = default;
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bool m_bool;
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};
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class Row {
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public:
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explicit Row(int cols_count, bool visible) : m_visible(visible), m_columns(cols_count) {};
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Row(const Row &other);
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Row &operator=(Row other);
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bool operator==(const Row &other) const {return this->compare(other) == 0; };
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void setColumnNull(int col_index);
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void setIntColumnValue(int col_index, long value);
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void setFloatColumnValue(int col_index, double value);
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void setStringColumnValue(int col_index, const std::string &value);
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void setDateColumnValue(int col_index, long value);
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void setDateColumnValue(int col_index, const std::string &value);
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void setBoolColumnValue(int col_index, bool value);
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void setBoolColumnValue(int col_index, const std::string &value);
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void setColumnValue(ColDefNode *col_def, ColValue &col_value);
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void setColumnValue(ColDefNode *col_def, ValueNode *col_value);
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ColValue &operator[](int i) const {
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auto type_index = m_columns[i].index();
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switch (type_index) {
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case 0:
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return (ColValue &) *std::get_if<ColNullValue>(&m_columns[i]);
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case 1:
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return (ColValue &) *std::get_if<ColIntegerValue>(&m_columns[i]);
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case 2:
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return (ColValue &) *std::get_if<ColDoubleValue>(&m_columns[i]);
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case 3:
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return (ColValue &) *std::get_if<ColStringValue>(&m_columns[i]);
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case 4:
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return (ColValue &) *std::get_if<ColDateValue>(&m_columns[i]);
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case 5:
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return (ColValue &) *std::get_if<ColBooleanValue>(&m_columns[i]);
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default:
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throw Exception("ColValue &operator[](int i), type index invalid :" + std::to_string(type_index));
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}
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}
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[[nodiscard]] int compare(const Row &other) const;
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void print(const std::vector<ColDefNode> &col_defs);
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static int print_get_column_size(const ColDefNode &col_def);
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[[nodiscard]] bool is_visible() const { return m_visible; };
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void set_visible() { m_visible = true; };
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void set_deleted() { m_visible = false; };
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private:
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bool m_visible;
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std::vector<std::variant<ColNullValue, ColIntegerValue, ColDoubleValue, ColStringValue, ColDateValue, ColBooleanValue>> m_columns;
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};
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} // namespace
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