/// <summary>Creates a new <see cref="Ontology"/> specification.</summary>
/// <param name="displayName">Display name of the ontology.</param>
/// <param name="namespace">Namespace prefix and base URI</param>
/// <param name="terms">A collection of RDF classes and properties</param>
public Ontology(string displayName, NamespaceSpecification @namespace, params Term[] terms)
{
_displayName = (displayName ?? String.Empty);
Properties = terms.OfType<Property>().Select(property => property.InOntology(this)).ToList();
_namespace = @namespace;
Classes = terms.OfType<Class>().Select(@class => @class.InOntology(this)).ToList();
}
/// <summary>Creates a new <see cref="Ontology"/> specification.</summary>
/// <param name="displayName">Display name of the ontology.</param>
/// <param name="namespace">Namespace prefix and base URI</param>
/// <param name="terms">A collection of RDF classes and properties</param>
public Ontology([AllowNull] string displayName, NamespaceSpecification @namespace, params Term[] terms)
{
_displayName = (displayName ?? String.Empty);
Properties = terms.OfType<Property>().Select(property => property.InOntology(this)).ToList();
_namespace = @namespace;
Classes = terms.OfType<Class>().Select(@class => @class.InOntology(this)).ToList();
}
private IOntology CreateFromXML(Stream fileStream)
{
bool isOwlBasedFile = true;
XDocument document = XDocument.Load(fileStream);
XElement ontologyElement = (from element in document.Descendants() where element.Name.LocalName == "Ontology" select element).FirstOrDefault();
if (ontologyElement == null)
{
isOwlBasedFile = false;
ontologyElement = (
from element in document.Descendants()
where (element.Name.LocalName == "Description") && (element.Descendants().Any(item =>
(item.Name.LocalName == "type") && (item.Attributes().Any(attribute => (attribute.Name.LocalName == "resource") && (attribute.Value == "http://www.w3.org/2002/07/owl#Ontology")))))
select element).FirstOrDefault();
if (ontologyElement == null)
{
throw new ArgumentOutOfRangeException("Provided stream does not contain ontology information suitable for usage.");
}
}
NamespaceSpecification namespaceSpecification = null;
string displayName = null;
IEnumerable <Term> terms = null;
namespaceSpecification = (
from attribute in ontologyElement.Attributes()
where attribute.Name.LocalName == "about"
select new NamespaceSpecification(ontologyElement.GetPrefixOfNamespace(attribute.Value), new Uri(attribute.Value))).FirstOrDefault();
displayName = (
from child in ontologyElement.Descendants()
where (child.Name.LocalName == "label") || (child.Name.LocalName == "title")
select child.Value).FirstOrDefault();
if (isOwlBasedFile)
{
terms = CreateFromOWLXML(document, namespaceSpecification.BaseUri);
}
else
{
terms = CreateFromRDFXML(document, namespaceSpecification.BaseUri);
}
return(new Ontology(displayName, namespaceSpecification, terms.ToArray()));
}
/// <summary>Creates a new <see cref="Ontology"/> specification.</summary>
/// <param name="namespace">Namespace prefix and base URI</param>
/// <param name="terms">A collection of RDF classes and properties</param>
public Ontology(NamespaceSpecification @namespace, params Term[] terms)
: this(String.Empty, @namespace, terms)
{
}
#pragma warning restore
private bool Equals(NamespaceSpecification other)
{
return(BaseUri.Equals(other.BaseUri) && string.Equals(Prefix, other.Prefix));
}
/// <summary>Creates a new <see cref="Ontology"/> specification.</summary>
/// <param name="namespace">Namespace prefix and base URI</param>
/// <param name="terms">A collection of RDF classes and properties</param>
public Ontology(NamespaceSpecification @namespace, params Term[] terms) : this(String.Empty, @namespace, terms)
{
}
#pragma warning restore
private bool Equals(NamespaceSpecification other)
{
return BaseUri.Equals(other.BaseUri) && string.Equals(Prefix, other.Prefix);
}
