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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180

use std::fmt::{Result, Write};

use crate::bitmap::Bitmap;

use super::Array;

/// Returns a function that writes the value of the element of `array`
/// at position `index` to a [`Write`],
/// writing `null` in the null slots.
pub fn get_value_display<'a, F: Write + 'a>(
    array: &'a dyn Array,
    null: &'static str,
) -> Box<dyn Fn(&mut F, usize) -> Result + 'a> {
    use crate::datatypes::PhysicalType::*;
    match array.data_type().to_physical_type() {
        Null => Box::new(move |f, _| write!(f, "{}", null)),
        Boolean => Box::new(|f, index| {
            super::boolean::fmt::write_value(array.as_any().downcast_ref().unwrap(), index, f)
        }),
        Primitive(primitive) => with_match_primitive_type!(primitive, |$T| {
            let writer = super::primitive::fmt::get_write_value::<$T, _>(
                array.as_any().downcast_ref().unwrap(),
            );
            Box::new(move |f, index| writer(f, index))
        }),
        Binary => Box::new(|f, index| {
            super::binary::fmt::write_value::<i32, _>(
                array.as_any().downcast_ref().unwrap(),
                index,
                f,
            )
        }),
        FixedSizeBinary => Box::new(|f, index| {
            super::fixed_size_binary::fmt::write_value(
                array.as_any().downcast_ref().unwrap(),
                index,
                f,
            )
        }),
        LargeBinary => Box::new(|f, index| {
            super::binary::fmt::write_value::<i64, _>(
                array.as_any().downcast_ref().unwrap(),
                index,
                f,
            )
        }),
        Utf8 => Box::new(|f, index| {
            super::utf8::fmt::write_value::<i32, _>(
                array.as_any().downcast_ref().unwrap(),
                index,
                f,
            )
        }),
        LargeUtf8 => Box::new(|f, index| {
            super::utf8::fmt::write_value::<i64, _>(
                array.as_any().downcast_ref().unwrap(),
                index,
                f,
            )
        }),
        List => Box::new(move |f, index| {
            super::list::fmt::write_value::<i32, _>(
                array.as_any().downcast_ref().unwrap(),
                index,
                null,
                f,
            )
        }),
        FixedSizeList => Box::new(move |f, index| {
            super::fixed_size_list::fmt::write_value(
                array.as_any().downcast_ref().unwrap(),
                index,
                null,
                f,
            )
        }),
        LargeList => Box::new(move |f, index| {
            super::list::fmt::write_value::<i64, _>(
                array.as_any().downcast_ref().unwrap(),
                index,
                null,
                f,
            )
        }),
        Struct => Box::new(move |f, index| {
            super::struct_::fmt::write_value(array.as_any().downcast_ref().unwrap(), index, null, f)
        }),
        Union => Box::new(move |f, index| {
            super::union::fmt::write_value(array.as_any().downcast_ref().unwrap(), index, null, f)
        }),
        Map => todo!(),
        Dictionary(key_type) => match_integer_type!(key_type, |$T| {
            Box::new(move |f, index| {
                super::dictionary::fmt::write_value::<$T,_>(array.as_any().downcast_ref().unwrap(), index, null, f)
            })
        }),
    }
}

/// Returns a function that writes the element of `array`
/// at position `index` to a [`Write`], writing `null` to the null slots.
pub fn get_display<'a, F: Write + 'a>(
    array: &'a dyn Array,
    null: &'static str,
) -> Box<dyn Fn(&mut F, usize) -> Result + 'a> {
    let value_display = get_value_display(array, null);
    Box::new(move |f, row| {
        if array.is_null(row) {
            f.write_str(null)
        } else {
            value_display(f, row)
        }
    })
}

pub fn write_vec<D, F>(
    f: &mut F,
    d: D,
    validity: Option<&Bitmap>,
    len: usize,
    null: &'static str,
    new_lines: bool,
) -> Result
where
    D: Fn(&mut F, usize) -> Result,
    F: Write,
{
    f.write_char('[')?;
    write_list(f, d, validity, len, null, new_lines)?;
    f.write_char(']')?;
    Ok(())
}

fn write_list<D, F>(
    f: &mut F,
    d: D,
    validity: Option<&Bitmap>,
    len: usize,
    null: &'static str,
    new_lines: bool,
) -> Result
where
    D: Fn(&mut F, usize) -> Result,
    F: Write,
{
    for index in 0..len {
        if index != 0 {
            f.write_char(',')?;
            f.write_char(if new_lines { '\n' } else { ' ' })?;
        }
        if let Some(val) = validity {
            if val.get_bit(index) {
                d(f, index)
            } else {
                write!(f, "{}", null)
            }
        } else {
            d(f, index)
        }?;
    }
    Ok(())
}

pub fn write_map<D, F>(
    f: &mut F,
    d: D,
    validity: Option<&Bitmap>,
    len: usize,
    null: &'static str,
    new_lines: bool,
) -> Result
where
    D: Fn(&mut F, usize) -> Result,
    F: Write,
{
    f.write_char('{')?;
    write_list(f, d, validity, len, null, new_lines)?;
    f.write_char('}')?;
    Ok(())
}