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J'essaie de faire un document RDF avec Apache Jena dans lequel je veux des informations sur les musées. Je fais les ressources et le modèle, mais quand j'imprimerai le résultat final, cela me donnera les propriétés de tous les musées dans la première ressource de musée. Qu'est-ce que je fais de mal dans ce morceau de code?Apache Jena - numéro sur la génération RDF
(la sortie est en bas).
C'est générateur RDF Jena:
public class RDFTesting2 {
public static void main(String[] args) {
MuseInfo info = new MuseInfo();
ArrayList<HashMap<String, String>> rdfData = info.getMuseInfo();
StringWriter out = new StringWriter();
String outStr = "";
String ns = "http://opendata.cs.pub.ro/resource/";
String nsVCard = "http://www.w3.org/2006/vcard/ns#";
String nsProp = "http://opendata.cs.pub.ro/property/";
String nsDbPedia = "http://dbpedia.org/ontology/";
Model model = ModelFactory.createDefaultModel();
model.setNsPrefix("vCard", nsVCard);
model.setNsPrefix("opendata", nsProp);
model.setNsPrefix("dbPedia", nsDbPedia);
for (int i = 0; i < rdfData.size(); i++) {
String museId = rdfData.get(i).get("id");
Resource museContacts = model.createResource(ns + "contacts");
Resource museContact = model.createResource(ns + "contact");
Resource museLocation = model.createResource(ns + "location");
Resource museInfo = model.createResource(ns + "info");
Property contactProp = model.createProperty(nsProp + "contacts");
Property contactInfo = model.createProperty(nsProp + "contact");
Property locationInfo = model.createProperty(nsProp + "location");
Property genInfo = model.createProperty(nsProp + "info");
Property contactPerson = model.createProperty(nsDbPedia + "contactPerson");
Resource museum = model.createResource(ns + "museum_" + museId + "/");
museContact
.addProperty(VCARD2.hasTelephone, rdfData.get(i).get("telefon"))
.addProperty(contactPerson, rdfData.get(i).get("persoana contact"));
museLocation
.addProperty(VCARD2.hasLocality, rdfData.get(i).get("localitatea"));
museInfo
.addProperty(VCARD2.hasUID, rdfData.get(i).get("id"))
.addProperty(VCARD2.hasTitle, rdfData.get(i).get("denumire"), "ro");
model
.add(museContacts, contactInfo, museContact)
.add(museContacts, locationInfo, museLocation)
.add(museum, contactProp, museContacts)
.add(museum, genInfo, museInfo);
}
model.write(out, "RDF/XML");
String result = out.toString();
model.removeAll(); // Curata modelul
outStr += result;
out.getBuffer().setLength(0); // Curata bufferul
System.out.println(outStr);
}
}
C'est générateur de classe info musées:
public class MuseInfo {
public ArrayList<HashMap<String, String>> getMuseInfo() {
ArrayList<HashMap<String, String>> rdfData = new ArrayList<HashMap<String, String>>();
HashMap<String, String> hm;
hm = new HashMap<String, String>();
hm.put("denumire", "Centrul folcloric Grădiniţa, Galicea Mare");
hm.put("id", "0");
hm.put("localitatea", "Galicea Mare");
hm.put("persoana contact", "Gologan Veronica");
hm.put("telefon", "0241.542.277");
rdfData.add(hm);
hm = new HashMap<String, String>();
hm.put("denumire", "Acvariul Constanţa");
hm.put("id", "1");
hm.put("localitatea", "Constanţa");
hm.put("persoana contact", "E. Şerbănescu");
hm.put("telefon", "0241/481.461");
rdfData.add(hm);
hm = new HashMap<String, String>();
hm.put("denumire", "Ansamblul brâncovenesc de la Potlogi");
hm.put("id", "2");
hm.put("localitatea", "Potlogi");
hm.put("persoana contact", "Gheorghe Olteanu");
hm.put("telefon", "0245.61 39 46");
rdfData.add(hm);
return rdfData;
}
}
La sortie est que:
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:opendata="http://opendata.cs.pub.ro/property/"
xmlns:vCard="http://www.w3.org/2006/vcard/ns#"
xmlns:dbPedia="http://dbpedia.org/ontology/">
<rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/museum_0/">
<opendata:info>
<rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/info">
<vCard:hasTitle xml:lang="ro">Ansamblul brâncovenesc de la Potlogi</vCard:hasTitle>
<vCard:hasUID>2</vCard:hasUID>
<vCard:hasTitle xml:lang="ro">Acvariul Constanţa</vCard:hasTitle>
<vCard:hasUID>1</vCard:hasUID>
<vCard:hasTitle xml:lang="ro">Centrul folcloric Grădiniţa, Galicea Mare</vCard:hasTitle>
<vCard:hasUID>0</vCard:hasUID>
</rdf:Description>
</opendata:info>
<opendata:contacts>
<rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/contacts">
<opendata:location>
<rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/location">
<vCard:hasLocality>Potlogi</vCard:hasLocality>
<vCard:hasLocality>Constanţa</vCard:hasLocality>
<vCard:hasLocality>Galicea Mare</vCard:hasLocality>
</rdf:Description>
</opendata:location>
<opendata:contact>
<rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/contact">
<dbPedia:contactPerson>Gheorghe Olteanu</dbPedia:contactPerson>
<vCard:hasTelephone>0245.61 39 46</vCard:hasTelephone>
<dbPedia:contactPerson>E. Şerbănescu</dbPedia:contactPerson>
<vCard:hasTelephone>0241/481.461</vCard:hasTelephone>
<dbPedia:contactPerson>Gologan Veronica</dbPedia:contactPerson>
<vCard:hasTelephone>0241.542.277</vCard:hasTelephone>
</rdf:Description>
</opendata:contact>
</rdf:Description>
</opendata:contacts>
</rdf:Description>
<rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/museum_1/">
<opendata:info rdf:resource="http://opendata.cs.pub.ro/resource/info"/>
<opendata:contacts rdf:resource="http://opendata.cs.pub.ro/resource/contacts"/>
</rdf:Description>
<rdf:Description rdf:about="http://opendata.cs.pub.ro/resource/museum_2/">
<opendata:info rdf:resource="http://opendata.cs.pub.ro/resource/info"/>
<opendata:contacts rdf:resource="http://opendata.cs.pub.ro/resource/contacts"/>
</rdf:Description>
</rdf:RDF>