public RDFa1(IDocument document)
{
this.document=document;
this.context=new RDFa.EvalContext();
this.context.baseURI=document.getBaseURI();
this.context.namespaces=new PeterO.Support.LenientDictionary<string,string>();
if(!URIUtility.hasScheme(this.context.baseURI))
throw new ArgumentException("baseURI: "+this.context.baseURI);
this.context.parentSubject=RDFTerm.fromIRI(this.context.baseURI);
this.context.parentObject=null;
this.context.iriMap=new PeterO.Support.LenientDictionary<string,string>();
this.context.listMap=new PeterO.Support.LenientDictionary<string,IList<RDFTerm>>();
this.context.incompleteTriples=new List<RDFa.IncompleteTriple>();
this.context.language=null;
this.outputGraph=new HashSet<RDFTriple>();
if(isHtmlElement(document.getDocumentElement(),"html")){
xhtml=true;
}
}
private void process(IElement node, bool root)
{
IList<RDFa.IncompleteTriple> incompleteTriplesLocal=new List<RDFa.IncompleteTriple>();
string localLanguage=context.language;
RDFTerm newSubject=null;
bool recurse=true;
bool skipElement=false;
RDFTerm currentObject=null;
IDictionary<string,string> namespacesLocal=
new PeterO.Support.LenientDictionary<string,string>(context.namespaces);
IDictionary<string,string> iriMapLocal=
new PeterO.Support.LenientDictionary<string,string>(context.iriMap);
string attr=null;
if(!xhtml){
attr=node.getAttribute("xml:base");
if(attr!=null){
context.baseURI=URIUtility.relativeResolve(attr, context.baseURI);
}
}
// Support XML namespaces
foreach(var attrib in node.getAttributes()){
string name=StringUtility.toLowerCaseAscii(attrib.getName());
//Console.WriteLine(attrib);
if(name.Equals("xmlns")){
//Console.WriteLine("xmlns %s",attrib.getValue());
iriMapLocal.Add("", attrib.getValue());
namespacesLocal.Add("", attrib.getValue());
} else if(name.StartsWith("xmlns:",StringComparison.Ordinal) && name.Length>6){
string prefix=name.Substring(6);
//Console.WriteLine("xmlns %s %s",prefix,attrib.getValue());
if(!"_".Equals(prefix)){
iriMapLocal.Add(prefix, attrib.getValue());
}
namespacesLocal.Add(prefix, attrib.getValue());
}
}
attr=node.getAttribute("xml:lang");
if(attr!=null){
localLanguage=attr;
}
// Support RDF/XML metadata
if(node.getLocalName().Equals("RDF") &&
RDF_NAMESPACE.Equals(node.getNamespaceURI())){
miniRdfXml(node,context);
return;
}
string rel=node.getAttribute("rel");
string rev=node.getAttribute("rev");
string property=node.getAttribute("property");
string content=node.getAttribute("content");
string datatype=node.getAttribute("datatype");
if(rel==null && rev==null){
// Step 4
RDFTerm resource=getSafeCurieOrCurieOrIri(
node.getAttribute("about"),iriMapLocal);
if(resource==null){
resource=getSafeCurieOrCurieOrIri(
node.getAttribute("resource"),iriMapLocal);
}
if(resource==null){
resource=relativeResolve(node.getAttribute("href"));
}
if(resource==null){
resource=relativeResolve(node.getAttribute("src"));
}
if((resource==null || resource.getKind()!=RDFTerm.IRI)){
string rdfTypeof=getCurie(node.getAttribute("typeof"),iriMapLocal);
if(isHtmlElement(node, "head") ||
isHtmlElement(node, "body")){
resource=getSafeCurieOrCurieOrIri("",iriMapLocal);
}
if(resource==null && !xhtml && root){
resource=getSafeCurieOrCurieOrIri("",iriMapLocal);
}
if(resource==null && rdfTypeof!=null){
resource=generateBlankNode();
}
if(resource==null){
if(context.parentObject!=null) {
resource=context.parentObject;
}
if(node.getAttribute("property")==null){
skipElement=true;
}
}
newSubject=resource;
} else {
newSubject=resource;
}
} else {
// Step 5
RDFTerm resource=getSafeCurieOrCurieOrIri(
node.getAttribute("about"),iriMapLocal);
if(resource==null){
resource=relativeResolve(node.getAttribute("src"));
}
if((resource==null || resource.getKind()!=RDFTerm.IRI)){
string rdfTypeof=getCurie(node.getAttribute("typeof"),iriMapLocal);
if(isHtmlElement(node, "head") ||
isHtmlElement(node, "body")){
resource=getSafeCurieOrCurieOrIri("",iriMapLocal);
}
if(resource==null && !xhtml && root){
resource=getSafeCurieOrCurieOrIri("",iriMapLocal);
}
if(resource==null && rdfTypeof!=null){
resource=generateBlankNode();
}
if(resource==null){
if(context.parentObject!=null) {
resource=context.parentObject;
}
}
newSubject=resource;
} else {
newSubject=resource;
}
resource=getSafeCurieOrCurieOrIri(
node.getAttribute("resource"),iriMapLocal);
if(resource==null){
resource=relativeResolve(node.getAttribute("href"));
}
currentObject=resource;
}
// Step 6
if(newSubject!=null){
string[] types=StringUtility.splitAtNonFFSpaces(node.getAttribute("typeof"));
foreach(var type in types){
string iri=getCurie(type,iriMapLocal);
if(iri!=null){
outputGraph.Add(new RDFTriple(
newSubject,RDFTerm.A,
RDFTerm.fromIRI(iri)
));
}
}
}
// Step 7
if(currentObject!=null){
string[] types=StringUtility.splitAtNonFFSpaces(rel);
foreach(var type in types){
string iri=getRelTermOrCurie(type,
iriMapLocal);
#if DEBUG
if(!(newSubject!=null))throw new InvalidOperationException("doesn't satisfy newSubject!=null");
#endif
if(iri!=null){
outputGraph.Add(new RDFTriple(
newSubject,
RDFTerm.fromIRI(iri),currentObject
));
}
}
types=StringUtility.splitAtNonFFSpaces(rev);
foreach(var type in types){
string iri=getRelTermOrCurie(type,
iriMapLocal);
if(iri!=null){
outputGraph.Add(new RDFTriple(
currentObject,
RDFTerm.fromIRI(iri),
newSubject
));
}
}
} else {
// Step 8
string[] types=StringUtility.splitAtNonFFSpaces(rel);
bool hasPredicates=false;
// Defines predicates
foreach(var type in types){
string iri=getRelTermOrCurie(type,
iriMapLocal);
if(iri!=null){
if(!hasPredicates){
hasPredicates=true;
currentObject=generateBlankNode();
}
RDFa.IncompleteTriple inc=new RDFa.IncompleteTriple();
inc.predicate=RDFTerm.fromIRI(iri);
inc.direction=RDFa.ChainingDirection.Forward;
incompleteTriplesLocal.Add(inc);
}
}
types=StringUtility.splitAtNonFFSpaces(rev);
foreach(var type in types){
string iri=getRelTermOrCurie(type,
iriMapLocal);
if(iri!=null){
if(!hasPredicates){
hasPredicates=true;
currentObject=generateBlankNode();
}
RDFa.IncompleteTriple inc=new RDFa.IncompleteTriple();
inc.predicate=RDFTerm.fromIRI(iri);
inc.direction=RDFa.ChainingDirection.Reverse;
incompleteTriplesLocal.Add(inc);
}
}
}
// Step 9
string[] preds=StringUtility.splitAtNonFFSpaces(property);
string datatypeValue=getCurie(datatype,
iriMapLocal);
if(datatype!=null && datatypeValue==null) {
datatypeValue="";
}
//Console.WriteLine("datatype=[%s] prop=%s vocab=%s",
// datatype,property,localDefaultVocab);
//Console.WriteLine("datatypeValue=[%s]",datatypeValue);
RDFTerm currentProperty=null;
foreach(var pred in preds){
string iri=getCurie(pred,
iriMapLocal);
if(iri!=null){
//Console.WriteLine("iri=[%s]",iri);
currentProperty=null;
if(datatypeValue!=null && datatypeValue.Length>0 &&
!datatypeValue.Equals(RDF_XMLLITERAL)){
string literal=content;
if(literal==null) {
literal=getTextNodeText(node);
}
currentProperty=RDFTerm.fromTypedString(literal,datatypeValue);
} else if(node.getAttribute("content")!=null ||
!hasNonTextChildNodes(node) ||
(datatypeValue!=null && datatypeValue.Length==0)){
string literal=node.getAttribute("content");
if(literal==null) {
literal=getTextNodeText(node);
}
currentProperty=(!string.IsNullOrEmpty(localLanguage)) ?
RDFTerm.fromLangString(literal, localLanguage) :
RDFTerm.fromTypedString(literal);
} else if(hasNonTextChildNodes(node) &&
(datatypeValue==null || datatypeValue.Equals(RDF_XMLLITERAL))){
// XML literal
recurse=false;
if(datatypeValue==null) {
datatypeValue=RDF_XMLLITERAL;
}
try {
string literal=ExclusiveCanonicalXML.canonicalize(node,
false, namespacesLocal);
currentProperty=RDFTerm.fromTypedString(literal,datatypeValue);
} catch(ArgumentException){
// failure to canonicalize
}
}
#if DEBUG
if(!(newSubject!=null))throw new InvalidOperationException("doesn't satisfy newSubject!=null");
#endif
outputGraph.Add(new RDFTriple(
newSubject,
RDFTerm.fromIRI(iri),currentProperty
));
}
}
// Step 10
if(!skipElement && newSubject!=null){
foreach(var triple in context.incompleteTriples){
if(triple.direction==RDFa.ChainingDirection.Forward){
outputGraph.Add(new RDFTriple(
context.parentSubject,
triple.predicate,
newSubject));
} else {
outputGraph.Add(new RDFTriple(
newSubject,triple.predicate,
context.parentSubject));
}
}
}
// Step 13
if(recurse){
foreach(var childNode in node.getChildNodes()){
IElement childElement;
RDFa.EvalContext oldContext=context;
if(childNode is IElement){
childElement=((IElement)childNode);
//Console.WriteLine("skip=%s vocab=%s local=%s",
// skipElement,context.defaultVocab,
//localDefaultVocab);
if(skipElement){
RDFa.EvalContext ec=oldContext.copy();
ec.language=localLanguage;
ec.iriMap=iriMapLocal;
ec.namespaces=namespacesLocal;
context=ec;
process(childElement,false);
} else {
RDFa.EvalContext ec=new RDFa.EvalContext();
ec.baseURI=oldContext.baseURI;
ec.iriMap=iriMapLocal;
ec.namespaces=namespacesLocal;
ec.incompleteTriples=incompleteTriplesLocal;
ec.parentSubject=((newSubject==null) ? oldContext.parentSubject :
newSubject);
ec.parentObject=((currentObject==null) ?
((newSubject==null) ? oldContext.parentSubject :
newSubject) : currentObject);
ec.language=localLanguage;
context=ec;
process(childElement,false);
}
}
context=oldContext;
}
}
}
