shex_ast 0.2.18

RDF data shapes implementation 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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154

use crate::{Shape, ShapeExprLabel};
use prefixmap::IriRef;
use rudof_iri::IriS;
use serde::{Deserialize, Serialize};

use super::{Schema, ShapeDecl, ShapeExpr, TripleExpr, ValueSetValue};

#[derive(Deserialize, Serialize, Debug, PartialEq, Clone)]
pub struct SimpleReprSchema {
    shapes: Vec<SimpleReprShape>,
}

impl Default for SimpleReprSchema {
    fn default() -> Self {
        Self::new()
    }
}

impl SimpleReprSchema {
    pub fn new() -> SimpleReprSchema {
        SimpleReprSchema { shapes: Vec::new() }
    }

    pub fn populate_from_schema(&mut self, schema: &Schema) {
        if let Some(shapes) = schema.shapes() {
            for shape in shapes {
                let simple_shape = self.convert_shape_decl(&shape, schema);
                self.shapes.push(simple_shape)
            }
        }
    }

    pub fn convert_shape_decl(&mut self, shape_decl: &ShapeDecl, schema: &Schema) -> SimpleReprShape {
        self.convert_shape_expr(&shape_decl.id, &shape_decl.shape_expr, schema)
    }

    pub fn convert_shape_expr(&mut self, name: &ShapeExprLabel, shape: &ShapeExpr, schema: &Schema) -> SimpleReprShape {
        match shape {
            ShapeExpr::ShapeOr { shape_exprs: _ } => todo!(),
            ShapeExpr::ShapeAnd { shape_exprs: _ } => todo!(),
            ShapeExpr::ShapeNot { shape_expr: _ } => todo!(),
            ShapeExpr::NodeConstraint(_) => todo!(),
            ShapeExpr::Shape(shape) => self.convert_shape(name, shape, schema),
            ShapeExpr::External => todo!(),
            ShapeExpr::Ref(_) => todo!(),
        }
    }

    pub fn convert_shape(&mut self, name: &ShapeExprLabel, shape: &Shape, schema: &Schema) -> SimpleReprShape {
        let mut simple = SimpleReprShape::new(name);
        if let Some(triple_expr) = &shape.expression {
            self.convert_triple_expr(&mut simple, &triple_expr.te, schema);
        }
        simple
    }

    pub fn convert_triple_expr(&mut self, shape: &mut SimpleReprShape, te: &TripleExpr, schema: &Schema) {
        match te {
            TripleExpr::EachOf {
                id: _,
                expressions,
                min: _,
                max: _,
                sem_acts: _,
                annotations: _,
            } => {
                for te in expressions {
                    self.convert_triple_expr(shape, &(te.te), schema);
                }
            },
            TripleExpr::OneOf {
                id: _,
                expressions,
                min: _,
                max: _,
                sem_acts: _,
                annotations: _,
            } => {
                for te in expressions {
                    self.convert_triple_expr(shape, &te.te, schema);
                }
            },
            TripleExpr::TripleConstraint {
                id: _,
                negated: _,
                inverse: _,
                predicate,
                value_expr,
                min: _,
                max: _,
                sem_acts: _,
                annotations: _,
            } => {
                let iri = schema.resolve_iriref(predicate);
                if iri == IriS::rdf_type() {
                    if let Some(se) = value_expr {
                        self.extract_class_values(se, shape);
                    }
                } else {
                    shape.add_predicate(predicate)
                }
            },
            TripleExpr::Ref(_) => todo!(),
        }
    }

    fn extract_class_values(&mut self, se: &ShapeExpr, shape: &mut SimpleReprShape) {
        match se {
            ShapeExpr::NodeConstraint(nc) => {
                if let Some(values) = nc.values() {
                    for value in values {
                        match value {
                            ValueSetValue::ObjectValue(ov) => match ov {
                                super::ObjectValue::IriRef(iri_ref) => shape.add_class(&iri_ref),
                                super::ObjectValue::Literal(_) => todo!(),
                            },
                            _ => todo!(),
                        }
                    }
                }
            },
            _ => todo!(),
        }
    }
}

#[derive(Deserialize, Serialize, Debug, PartialEq, Clone)]
pub struct SimpleReprShape {
    #[serde(skip_serializing)]
    id: ShapeExprLabel,

    #[serde(skip_serializing_if = "Vec::is_empty")]
    class: Vec<IriRef>,

    predicates: Vec<IriRef>,
}

impl SimpleReprShape {
    pub fn new(label: &ShapeExprLabel) -> SimpleReprShape {
        SimpleReprShape {
            id: label.clone(),
            class: Vec::new(),
            predicates: Vec::new(),
        }
    }

    pub fn add_predicate(&mut self, pred: &IriRef) {
        self.predicates.push(pred.clone())
    }

    pub fn add_class(&mut self, cls: &IriRef) {
        self.class.push(cls.clone())
    }
}