@tpluscode/rdfine/lib/conversion.js

RDF/JS idiomatic, native, effective

import rdf from '@rdfjs/data-model';
export function fromLiteral(env, type, obj) {
    if (type === Boolean) {
        return rdf.literal('true', env.ns.xsd.boolean).equals(obj.term);
    }
    if (type === Number) {
        return Number.parseFloat(obj.value);
    }
    if (type === Date) {
        return new Date(Date.parse(obj.value));
    }
    return obj.value;
}
export function toLiteral(env, value, datatype) {
    switch (typeof value) {
        case 'boolean':
            return rdf.literal(value.toString(), datatype || env.ns.xsd.boolean);
        case 'number':
            return rdf.literal(value.toString(), datatype || (Number.isInteger(value) ? env.ns.xsd.integer : env.ns.xsd.float));
        case 'bigint':
            return rdf.literal(value.toString(), datatype || env.ns.xsd.long);
        case 'string':
            return rdf.literal(value, datatype);
        case 'object':
            if (value instanceof Date) {
                const literal = value.toISOString();
                if (env.ns.xsd.date.equals(datatype)) {
                    return rdf.literal(literal.substr(0, 10), env.ns.xsd.date);
                }
                return rdf.literal(literal, datatype || env.ns.xsd.dateTime);
            }
            break;
    }
    return undefined;
}