File indexing completed on 2024-11-24 04:44:39 

0001 /*
0002  * SPDX-FileCopyrightText: 2021 Volker Krause <vkrause@kde.org>
0003  * SPDX-License-Identifier: LGPL-2.0-or-later
0004  */
0005 
0006 #ifndef RDF_H
0007 #define RDF_H
0008 
0009 #include <QString>
0010 
0011 #include <vector>
0012 
0013 class QIODevice;
0014 
0015 /** Universal RDF Dataset Normalization Algorithm 2015 (URDNA2015)
0016   * @note This is far from a complete implementation of the full spec, this barely
0017   * covers enough for the needs of DIVOC JWS verification.
0018   */
0019 namespace Rdf
0020 {
0021 class Term {
0022 public:
0023     enum Type {
0024         Undefined,
0025         IRI,
0026         Literal,
0027         BlankNode,
0028     } type = Undefined;
0029     QString value;
0030     QString literalType;
0031 
0032     bool operator<(const Term &other) const;
0033     bool operator==(const Term &other) const;
0034 };
0035 
0036 class Quad {
0037 public:
0038     Term subject;
0039     Term predicate;
0040     Term object;
0041     // ### graph - not relevant for us
0042 
0043     bool operator<(const Quad &other) const;
0044 };
0045 
0046 /** Apply the Universal RDF Dataset Normalization Algorithm 2015 (URDNA2015) to @p quads. */
0047 void normalize(std::vector<Rdf::Quad> &quads);
0048 
0049 /** Write list of RDF quads to @p out. */
0050 QByteArray serialize(const std::vector<Rdf::Quad> &quads);
0051 void serialize(QIODevice *out, const std::vector<Rdf::Quad> &quads);
0052 void serialize(QIODevice *out, const Rdf::Quad &quad);
0053 void serialize(QIODevice *out, const Rdf::Term &term);
0054 
0055 }
0056 
0057 #endif // RDF_H