print_graph/
print_graph.rs

1use std::env;
2
3use std::io;
4use tdb_succinct::TdbDataType;
5use terminus_store::*;
6use tokio;
7
8async fn print_graph(store_path: &str, graph: &str) -> io::Result<()> {
9    let store = open_directory_store(store_path);
10    let graph = store
11        .open(graph)
12        .await?
13        .expect(&format!("expected graph {} to exist", graph));
14
15    match graph.head().await? {
16        Some(layer) => {
17            for id_triple in layer.triples() {
18                // triples are retrieved in their id form. For printing,
19                // we need the string form. The conversion happens here.
20                let triple = layer
21                    .id_triple_to_string(&id_triple)
22                    .expect("expected id triple to be mapable to string");
23
24                println!(
25                    "{}, {}, {} {:?}",
26                    triple.subject,
27                    triple.predicate,
28                    match triple.object {
29                        ObjectType::Node(_) => "node",
30                        ObjectType::Value(_) => "value",
31                    },
32                    match triple.object {
33                        ObjectType::Node(n) => String::make_entry(&n),
34                        ObjectType::Value(v) => v,
35                    }
36                );
37            }
38        }
39        None => {}
40    }
41
42    Ok(())
43}
44
45#[tokio::main]
46async fn main() {
47    let args: Vec<String> = env::args().collect();
48    if args.len() != 3 {
49        println!("usage: {} <path> <graph_name>", args[0]);
50    } else {
51        print_graph(&args[1], &args[2]).await.unwrap();
52    }
53}
print_graph/print_graph.rs

print_graph/
print_graph.rs
