[GitHub] commons-rdf pull request #27: COMMONSRDF-47 RDFSyntax as an interface

[stain <gi...@git.apache.org>]

Github user stain commented on a diff in the pull request:

    https://github.com/apache/commons-rdf/pull/27#discussion_r95840179
  
    --- Diff: api/src/main/java/org/apache/commons/rdf/api/RDFSyntax.java ---
    @@ -22,6 +22,124 @@
     import java.util.Optional;
     
     /**
    + * An RDF syntax, e.g. as used for parsing and writing RDF.
    + * <p>
    + * An RDF syntax is uniquely identified by its {@link #mediaType()}, and has a
    + * suggested {@link #fileExtension()}.
    + * <p>
    + * Some of the RDF syntaxes may {@link #supportsDataset()}, meaning they can
    + * represent {@link Quad}s.
    + * <p>
    + * An enumeration of the official RDF 1.1 syntaxes is available in 
    + * {@link OfficialRDFSyntax} - for convenience they are also accessible
    + * as constants here, e.g. <code>RDFSyntax.JSONLD</code>.
    + * 
    + */
    +public interface RDFSyntax {
    + 
    +    public static OfficialRDFSyntax JSONLD = OfficialRDFSyntax.JSONLD;
    +    public static OfficialRDFSyntax TURTLE = OfficialRDFSyntax.TURTLE;
    +    public static OfficialRDFSyntax NQUADS = OfficialRDFSyntax.NQUADS;
    +    public static OfficialRDFSyntax NTRIPLES = OfficialRDFSyntax.NTRIPLES;
    +    public static OfficialRDFSyntax RDFA_HTML = OfficialRDFSyntax.RDFA_HTML;
    +    public static OfficialRDFSyntax RDFA_XHTML = OfficialRDFSyntax.RDFA_XHTML;
    +    public static OfficialRDFSyntax RDFXML = OfficialRDFSyntax.RDFXML;
    +    public static OfficialRDFSyntax TRIG = OfficialRDFSyntax.TRIG;
    +    
    +    /**
    +     * A short name of the RDF Syntax.
    +     * <p>
    +     * The name typically corresponds to the {@link Enum#name()} of for
    +     * {@link OfficialRDFSyntax}, e.g. <code>JSONLD</code>.
    +     * 
    +     * @return Short name for RDF syntax
    +     */
    +    public String name();
    +
    +    /**
    +     * The title of the RDF Syntax.
    +     * <p>
    +     * This is generally the title of the corresponding standard, 
    +     * e.g. <em>RDF 1.1 Turtle</em>.
    +     * 
    +     * @return Title of RDF Syntax
    +     */
    +    public String title();    
    +    
    +    /**
    +     * The <a href="https://tools.ietf.org/html/rfc2046">IANA media type</a> for
    +     * the RDF syntax.
    +     * <p>
    +     * The media type can be used as part of <code>Content-Type</code> and
    +     * <code>Accept</code> for <em>content negotiation</em> in the
    +     * <a href="https://tools.ietf.org/html/rfc7231#section-3.1.1.1">HTTP
    +     * protocol</a>.
    +     */
    +    public String mediaType();
    --- End diff --
    
    No, only the official media type and extension should be used in this interface - however subtypes might add `mediaTypes()` and similar, or list several `RDFSyntax` instances (which would then not be `.equal()`).


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