Examples with ShapeExpression org.apache.jena.shex.expressions.ShapeExpression used on opensource projects

Example 1 with ShapeExpression

use of org.apache.jena.shex.expressions.ShapeExpression in project jena by apache.

the class ShapeEvalTripleConstraint method matchesCardinalityTC.

/**
 * Triple Constraint, with cardinality
 */
static boolean matchesCardinalityTC(ValidationContext vCxt, Set<Triple> matchables, Node node, TripleConstraint tripleConstraint, Set<Node> extras) {
    Node predicate = tripleConstraint.getPredicate();
    if (tripleConstraint.reverse()) {
        // [shex] A bit of a fudge.
        matchables = G.find(vCxt.getData(), null, predicate, node).toSet();
    } else {
        if (!matchables.stream().allMatch(t -> predicate.equals(t.getPredicate()))) {
            // Other predicates present.
            return false;
        }
    }
    // Find same predicate.
    Set<Triple> triples = StreamOps.toSet(matchables.stream().filter(t -> predicate.equals(t.getPredicate())));
    int min = tripleConstraint.min();
    int max = tripleConstraint.max();
    ShapeExpression shExpr = tripleConstraint.getShapeExpression();
    Set<Triple> positive = triples.stream().filter(t -> {
        Node v = tripleConstraint.reverse() ? t.getSubject() : t.getObject();
        return shExpr.satisfies(vCxt, v);
    }).collect(Collectors.toSet());
    int N = positive.size();
    if (min >= 0 && N < min) {
        vCxt.reportEntry(new ReportItem("Cardinality violation (min=" + min + "): " + N, null));
        return false;
    }
    // Remove extras.
    if (extras == null || !extras.contains(predicate)) {
        if (positive.size() != triples.size())
            // Something did not match.
            return false;
    }
    if (max >= 0 && N > max) {
        vCxt.reportEntry(new ReportItem("Cardinality violation (max=" + max + "): " + N, null));
        return false;
    }
    return true;
}