1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* Copyright (c) 2021, Jan de Visser <jan@de-visser.net>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Badge.h>
#include <AK/ByteBuffer.h>
#include <AK/ScopeGuard.h>
#include <AK/String.h>
#include <AK/Variant.h>
#include <LibSQL/Forward.h>
#include <LibSQL/TupleDescriptor.h>
#include <LibSQL/Type.h>
#include <LibSQL/ValueImpl.h>
#include <string.h>
namespace SQL {
/**
* A `Value` is an atomic piece of SQL data`. A `Value` has a basic type
* (Text/String, Integer, Float, etc). Richer types are implemented in higher
* level layers, but the resulting data is stored in these `Value` objects.
*/
class Value {
public:
Value(Value&) = default;
Value(Value const&) = default;
explicit Value(SQLType sql_type = SQLType::Null);
template<typename... Ts>
explicit Value(Variant<Ts...> impl)
: m_impl(impl)
{
}
enum SetImplementation {
SetImplementationSingleton
};
template<typename I>
Value(SetImplementation, I&& impl)
{
m_impl.set<I>(forward<I>(impl));
}
Value(SQLType, Value const&);
Value(SQLType, String const&);
Value(SQLType, char const*);
Value(SQLType, int);
Value(SQLType, double);
Value(SQLType, bool);
explicit Value(String const&);
explicit Value(char const*);
explicit Value(int);
explicit Value(u32);
explicit Value(double);
explicit Value(bool);
~Value() = default;
[[nodiscard]] bool is_null() const;
[[nodiscard]] SQLType type() const;
[[nodiscard]] String type_name() const;
[[nodiscard]] BaseTypeImpl downcast_to_basetype() const;
template<typename Impl>
Impl const& get_impl(Badge<Impl>) const { return m_impl.get<Impl>(); }
[[nodiscard]] String to_string() const;
[[nodiscard]] Optional<int> to_int() const;
[[nodiscard]] Optional<u32> to_u32() const;
[[nodiscard]] Optional<double> to_double() const;
[[nodiscard]] Optional<bool> to_bool() const;
[[nodiscard]] Optional<Vector<Value>> to_vector() const;
explicit operator String() const;
explicit operator int() const;
explicit operator u32() const;
explicit operator double() const;
explicit operator bool() const;
void assign(Value const& other_value);
void assign(String const& string_value);
void assign(int int_value);
void assign(u32 unsigned_int_value);
void assign(double double_value);
void assign(bool bool_value);
void assign(Vector<Value> const& values);
Value& operator=(Value const& other);
Value& operator=(String const&);
Value& operator=(char const*);
Value& operator=(int);
Value& operator=(u32);
Value& operator=(double);
Value& operator=(bool);
Value& operator=(Vector<Value> const&);
[[nodiscard]] size_t length() const;
[[nodiscard]] u32 hash() const;
[[nodiscard]] bool can_cast(Value const&) const;
void serialize(Serializer&) const;
void deserialize(Serializer&);
[[nodiscard]] int compare(Value const&) const;
bool operator==(Value const&) const;
bool operator==(String const&) const;
bool operator==(int) const;
bool operator==(double) const;
bool operator!=(Value const&) const;
bool operator<(Value const&) const;
bool operator<=(Value const&) const;
bool operator>(Value const&) const;
bool operator>=(Value const&) const;
Value add(Value const&) const;
Value subtract(Value const&) const;
Value multiply(Value const&) const;
Value divide(Value const&) const;
Value modulo(Value const&) const;
Value shift_left(Value const&) const;
Value shift_right(Value const&) const;
Value bitwise_or(Value const&) const;
Value bitwise_and(Value const&) const;
[[nodiscard]] TupleElementDescriptor descriptor() const
{
return { "", "", "", type(), Order::Ascending };
}
static Value const& null();
static Value create_tuple(NonnullRefPtr<TupleDescriptor> const&);
static Value create_array(SQLType element_type, Optional<size_t> const& max_size = {});
private:
void setup(SQLType type);
ValueTypeImpl m_impl { NullImpl() };
friend Serializer;
};
}
|
