graphrecords_query/index/
edge_endpoint.rs

1use crate::{IndexDomain, QueryResult, index::GroupKey};
2use graphrecords_core::GraphRecord;
3use std::fmt::{self, Display, Formatter};
4
5#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug)]
6pub enum EdgeEndpointRole {
7    Source,
8    Target,
9}
10
11impl Display for EdgeEndpointRole {
12    fn fmt(&self, formatter: &mut Formatter<'_>) -> fmt::Result {
13        match self {
14            Self::Source => formatter.write_str("source"),
15            Self::Target => formatter.write_str("target"),
16        }
17    }
18}
19
20impl IndexDomain for EdgeEndpointRole {
21    type Index<'a> = Self;
22    type Owned = Self;
23
24    fn to_owned(index: &Self::Index<'_>) -> Self::Owned {
25        *index
26    }
27
28    fn from_owned(owned: &Self::Owned) -> Self::Index<'_> {
29        *owned
30    }
31}
32
33impl GroupKey for EdgeEndpointRole {
34    fn resolve_key<'a>(
35        _label: &'static str,
36        _graphrecord: &'a GraphRecord,
37        key: &Self::Owned,
38    ) -> QueryResult<Self::Index<'a>> {
39        Ok(*key)
40    }
41}

graphrecords_query/index/edge_endpoint.rs

graphrecords_query/index/
edge_endpoint.rs