mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-20 17:58:18 +03:00
86 lines
3.1 KiB
C++
86 lines
3.1 KiB
C++
/*
|
|
* Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Vector.h>
|
|
#include <LibSQL/Forward.h>
|
|
#include <LibSQL/TupleDescriptor.h>
|
|
#include <LibSQL/Value.h>
|
|
|
|
namespace SQL {
|
|
|
|
/**
|
|
* A Tuple is an element of a random-access data structure persisted in a Heap.
|
|
* Tuple objects stored in such a structure have a definition controlling the
|
|
* number of parts or columns the tuple has, the types of the parts, and the
|
|
* sort order of these parts. Besides having an optional definition, a Tuple
|
|
* consists of one Value object per part. In addition, tuples have a u32 pointer
|
|
* member which points to a Heap location.
|
|
*
|
|
* Tuple is a base class; concrete subclasses are Key, which implements the
|
|
* elements of an index, and Row, which implements the rows in a table.
|
|
*/
|
|
class Tuple {
|
|
public:
|
|
Tuple();
|
|
explicit Tuple(NonnullRefPtr<TupleDescriptor> const&, Block::Index = 0);
|
|
Tuple(NonnullRefPtr<TupleDescriptor> const&, Serializer&);
|
|
Tuple(Tuple const&);
|
|
virtual ~Tuple() = default;
|
|
|
|
Tuple& operator=(Tuple const&);
|
|
|
|
[[nodiscard]] DeprecatedString to_deprecated_string() const;
|
|
explicit operator DeprecatedString() const { return to_deprecated_string(); }
|
|
|
|
bool operator<(Tuple const& other) const { return compare(other) < 0; }
|
|
bool operator<=(Tuple const& other) const { return compare(other) <= 0; }
|
|
bool operator==(Tuple const& other) const { return compare(other) == 0; }
|
|
bool operator!=(Tuple const& other) const { return compare(other) != 0; }
|
|
bool operator>(Tuple const& other) const { return compare(other) > 0; }
|
|
bool operator>=(Tuple const& other) const { return compare(other) >= 0; }
|
|
|
|
[[nodiscard]] bool is_null() const { return m_data.is_empty(); }
|
|
[[nodiscard]] bool has(DeprecatedString const& name) const { return index_of(name).has_value(); }
|
|
|
|
Value const& operator[](size_t ix) const { return m_data[ix]; }
|
|
Value& operator[](size_t ix) { return m_data[ix]; }
|
|
Value const& operator[](DeprecatedString const& name) const;
|
|
Value& operator[](DeprecatedString const& name);
|
|
void append(Value const&);
|
|
Tuple& operator+=(Value const&);
|
|
void extend(Tuple const&);
|
|
|
|
[[nodiscard]] Block::Index block_index() const { return m_block_index; }
|
|
void set_block_index(Block::Index index) { m_block_index = index; }
|
|
|
|
[[nodiscard]] size_t size() const { return m_data.size(); }
|
|
[[nodiscard]] virtual size_t length() const;
|
|
void clear() { m_data.clear(); }
|
|
[[nodiscard]] NonnullRefPtr<TupleDescriptor> descriptor() const { return m_descriptor; }
|
|
[[nodiscard]] int compare(Tuple const&) const;
|
|
[[nodiscard]] int match(Tuple const&) const;
|
|
[[nodiscard]] u32 hash() const;
|
|
|
|
[[nodiscard]] Vector<Value> take_data() { return move(m_data); }
|
|
|
|
protected:
|
|
[[nodiscard]] Optional<size_t> index_of(StringView) const;
|
|
void copy_from(Tuple const&);
|
|
virtual void serialize(Serializer&) const;
|
|
virtual void deserialize(Serializer&);
|
|
|
|
private:
|
|
NonnullRefPtr<TupleDescriptor> m_descriptor;
|
|
Vector<Value> m_data;
|
|
Block::Index m_block_index { 0 };
|
|
|
|
friend Serializer;
|
|
};
|
|
|
|
}
|