@Override
public int write(TupleIterator iter) throws TrippiException {
try {
m_out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
doEntities();
m_out.println("<sparql xmlns=\"http://www.w3.org/2001/sw/DataAccess/rf1/result\">");
String[] names = iter.names();
m_out.println(" <head>");
for (int i = 0; i < names.length; i++) {
m_out.println(" <variable name=\"" + names[i] + "\"/>");
}
m_out.println(" </head>");
m_out.println(" <results>");
int count = 0;
while (iter.hasNext()) {
m_out.println(" <result>");
Map<String, Node> result = iter.next();
for (int i = 0; i < names.length; i++) {
m_out.print(" <" + names[i]);
Node n = result.get(names[i]);
if (n == null) {
m_out.println(" bound=\"false\"/>");
} else if (n instanceof URIReference) {
String uriString = ((URIReference) n).getURI().toString();
m_out.println(" uri=\"" + getURI(uriString) + "\"/>");
} else if (n instanceof BlankNode) {
String id = "blank" + n.hashCode();
m_out.println(" bnodeid=\"" + id + "\"/>");
} else if (n instanceof Literal) {
Literal lit = (Literal) n;
URI dType = lit.getDatatypeURI();
if (dType != null) {
m_out.print(" datatype=\"" + getURI(dType.toString()) + "\"");
}
String lang = lit.getLanguage();
if (lang != null) {
m_out.print(" xml:lang=\"" + lang + "\"");
}
m_out.println(">" + enc(lit.getLexicalForm()) + "</" + names[i] + ">");
} else {
throw new TrippiException("Unrecognized node type: " + n.getClass().getName());
}
}
m_out.println(" </result>");
m_out.flush();
count++;
}
m_out.println(" </results>");
m_out.println("</sparql>");
m_out.flush();
iter.close();
return count;
} catch (IOException e) {
throw new TrippiException("Error writing", e);
}
}
