shacl 0.2.18

A SHACL validator for RDF data, implemented in Rust.
Documentation 
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

use crate::ast::ASTShape;
use prefixmap::IriRef;
use rudof_rdf::rdf_core::SHACLPath;
use rudof_rdf::rdf_core::term::literal::ConcreteLiteral;
use rudof_rdf::rdf_core::term::{IriOrBlankNode, Object};
use std::fmt::{Display, Formatter};

#[allow(dead_code)]
#[derive(Debug, Clone, PartialEq)]
pub(crate) enum NodeExpr {
    // Constants
    Iri(IriRef),
    Literal(ConcreteLiteral),

    // Basic expressions
    Empty,
    Var(String),
    List(Vec<Object>),
    PathValues {
        path: SHACLPath,
        focus_node: Option<Box<NodeExpr>>,
    },
    Exists(Box<NodeExpr>),
    IfExpression {
        if_condition: Box<NodeExpr>,
        then: Box<NodeExpr>,
        else_expression: Box<NodeExpr>,
    },

    // List expressions
    Distinct(Box<NodeExpr>),
    Intersection(Vec<NodeExpr>),
    Concat(Vec<NodeExpr>),
    Remove {
        remove: Box<NodeExpr>,
        nodes: Box<NodeExpr>,
    },
    Filter {
        filter_shape: ASTShape,
        nodes: Box<NodeExpr>,
    },
    Limit {
        limit: usize,
        nodes: Box<NodeExpr>,
    },
    Offset {
        offset: usize,
        nodes: Box<NodeExpr>,
    },
    // OrderBy, // TODO - Not yet defined in the draft

    // Advance sequence operations
    FlatMap {
        flat_map: Box<NodeExpr>,
        nodes: Box<NodeExpr>,
    },
    FindFirst {
        find_first: ASTShape,
        nodes: Box<NodeExpr>,
    },
    MatchAll {
        match_all: ASTShape,
        nodes: Box<NodeExpr>,
    },

    // Aggregation expressions
    Count(Box<NodeExpr>),
    Min(Box<NodeExpr>),
    Max(Box<NodeExpr>),
    Sum(Box<NodeExpr>), // The draft mentions that maybe is removed

    // Miscellaneous expressions
    InstancesOf(IriRef),
    NodesMatching(IriOrBlankNode),
}

impl Display for NodeExpr {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        match self {
            NodeExpr::Iri(i) => write!(f, "iri({i})"),
            NodeExpr::Literal(l) => write!(f, "literal({l})"),
            NodeExpr::Empty => write!(f, "empty"),
            NodeExpr::Var(v) => write!(f, "var({v})"),
            NodeExpr::List(l) => write!(
                f,
                "list({})",
                l.iter().map(|o| o.to_string()).collect::<Vec<_>>().join(", ")
            ),
            NodeExpr::PathValues { focus_node, path } => {
                let fnode = match focus_node {
                    None => "".to_string(),
                    Some(n) => n.to_string(),
                };

                write!(f, "pathValues({path}, {fnode})")
            },
            NodeExpr::Exists(e) => write!(f, "exists({e})"),
            NodeExpr::IfExpression {
                if_condition,
                then,
                else_expression,
            } => {
                write!(f, "if({if_condition} then {then} else {else_expression})")
            },
            NodeExpr::Distinct(d) => write!(f, "distinct({d})"),
            NodeExpr::Intersection(i) => write!(
                f,
                "intersection({})",
                i.iter().map(|e| e.to_string()).collect::<Vec<_>>().join(", ")
            ),
            NodeExpr::Concat(c) => write!(
                f,
                "concat({})",
                c.iter().map(|e| e.to_string()).collect::<Vec<_>>().join(", ")
            ),
            NodeExpr::Remove { remove, nodes } => write!(f, "remove({remove} in {nodes})"),
            NodeExpr::Filter { filter_shape, nodes } => write!(f, "filter({filter_shape} in {nodes})"),
            NodeExpr::Limit { limit, nodes } => write!(f, "limit({limit} in {nodes})"),
            NodeExpr::Offset { offset, nodes } => write!(f, "offset({offset} in {nodes})"),
            NodeExpr::FlatMap { flat_map, nodes } => write!(f, "flatMap({flat_map} in {nodes})"),
            NodeExpr::FindFirst { find_first, nodes } => write!(f, "findFirst({find_first} in {nodes})"),
            NodeExpr::MatchAll { match_all, nodes } => write!(f, "matchAll({match_all} in {nodes})"),
            NodeExpr::Count(c) => write!(f, "count({c})"),
            NodeExpr::Min(m) => write!(f, "min({m})"),
            NodeExpr::Max(m) => write!(f, "max({m})"),
            NodeExpr::Sum(s) => write!(f, "sum({s})"),
            NodeExpr::InstancesOf(i) => write!(f, "instancesOf({i})"),
            NodeExpr::NodesMatching(n) => write!(f, "nodesMatching({n})"),
        }
    }
}