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

use crate::store::PropOwned;
use crate::Error;
use std::convert::{TryFrom, TryInto};

/// A single property which can be stored on a node or edge.
#[derive(Debug, Clone, PartialEq)]
pub enum Property {
    Id(u64),
    Integer(i64),
    Real(f64),
    Boolean(bool),
    Text(String),
    Blob(Vec<u8>),
    Null,
}

impl PropOwned {
    pub(crate) fn to_external(self) -> Property {
        match self {
            Self::Id(id) => Property::Id(id),
            Self::Integer(num) => Property::Integer(num),
            Self::Real(num) => Property::Real(num),
            Self::Boolean(val) => Property::Boolean(val),
            Self::Text(text) => Property::Text(text),
            Self::Blob(bytes) => Property::Blob(bytes),
            Self::Null => Property::Null,
        }
    }
}

impl Property {
    pub(crate) fn to_internal(self) -> PropOwned {
        match self {
            Self::Id(id) => PropOwned::Id(id),
            Self::Integer(num) => PropOwned::Integer(num),
            Self::Real(num) => PropOwned::Real(num),
            Self::Boolean(val) => PropOwned::Boolean(val),
            Self::Text(text) => PropOwned::Text(text),
            Self::Blob(bytes) => PropOwned::Blob(bytes),
            Self::Null => PropOwned::Null,
        }
    }
}

macro_rules! try_from {
    ($type:ty, $variant:ident) => {
        impl TryFrom<Property> for $type {
            type Error = Error;

            fn try_from(value: Property) -> Result<Self, Self::Error> {
                match value {
                    Property::$variant(val) => Ok(val),
                    _ => Err(Error::TypeMismatch),
                }
            }
        }

        impl TryFrom<Property> for Option<$type> {
            type Error = Error;

            fn try_from(value: Property) -> Result<Self, Self::Error> {
                match value {
                    Property::Null => Ok(None),
                    prop => Ok(Some(prop.try_into()?)),
                }
            }
        }

        impl From<$type> for Property {
            fn from(value: $type) -> Self {
                Property::$variant(value)
            }
        }

        impl From<Option<$type>> for Property {
            fn from(value: Option<$type>) -> Self {
                value.map(|v| v.into()).unwrap_or(Property::Null)
            }
        }
    };
}

macro_rules! from {
    ($type:ty, $variant:ident) => {
        impl From<$type> for Property {
            fn from(value: $type) -> Self {
                Property::$variant(value.into())
            }
        }

        impl From<Option<$type>> for Property {
            fn from(value: Option<$type>) -> Self {
                value.map(|v| v.into()).unwrap_or(Property::Null)
            }
        }
    };
}

try_from!(u64, Id);
try_from!(i64, Integer);
try_from!(f64, Real);
try_from!(bool, Boolean);
try_from!(String, Text);
try_from!(Vec<u8>, Blob);

from!(i32, Integer);
from!(&str, Text);
from!(&[u8], Blob);

impl<const N: usize> From<[u8; N]> for Property {
    fn from(value: [u8; N]) -> Self {
        Property::Blob(value.into())
    }
}

impl<const N: usize> From<Option<[u8; N]>> for Property {
    fn from(value: Option<[u8; N]>) -> Self {
        value.map(|v| v.into()).unwrap_or(Property::Null)
    }
}

impl<const N: usize> From<&[u8; N]> for Property {
    fn from(value: &[u8; N]) -> Self {
        Property::Blob(value.to_vec())
    }
}

impl<const N: usize> From<Option<&[u8; N]>> for Property {
    fn from(value: Option<&[u8; N]>) -> Self {
        value.map(|v| v.into()).unwrap_or(Property::Null)
    }
}