private void verbModel(Model model, String verb) {
Model m = ModelFactory.createDefaultModel();
int testLimit = 1000;
StmtIterator stmtIt = model.listStatements();
int count = 0;
try {
while (stmtIt.hasNext()) {
count++;
m.add(stmtIt.nextStatement());
if (count % testLimit == 0 || !stmtIt.hasNext()) {
StringWriter sw = new StringWriter();
m.write(sw, "N-TRIPLE");
StringBuffer updateStringBuff = new StringBuffer();
String graphURI = graph.getGraphURI();
updateStringBuff.append(
verb + " DATA { " + ((graphURI != null) ? "GRAPH <" + graphURI + "> { " : ""));
updateStringBuff.append(sw);
updateStringBuff.append(((graphURI != null) ? " } " : "") + " }");
String updateString = updateStringBuff.toString();
// log.info(updateString);
graph.executeUpdate(updateString);
m.removeAll();
}
}
} finally {
stmtIt.close();
}
}
@Override
public void delete(Graph g) {
Model[] model = separateStatementsWithBlankNodes(g);
deleteModel(model[1] /*statements without blank nodes*/);
// replace blank nodes in remaining statements with variables
StringBuffer patternBuff = new StringBuffer();
Iterator<Triple> tripIt = g.find(null, null, null);
while (tripIt.hasNext()) {
Triple t = tripIt.next();
patternBuff.append(SparqlGraph.sparqlNodeDelete(t.getSubject(), null));
patternBuff.append(" ");
patternBuff.append(SparqlGraph.sparqlNodeDelete(t.getPredicate(), null));
patternBuff.append(" ");
patternBuff.append(SparqlGraph.sparqlNodeDelete(t.getObject(), null));
patternBuff.append(" .\n");
}
StringBuffer queryBuff = new StringBuffer();
String graphURI = graph.getGraphURI();
queryBuff.append(
"DELETE { " + ((graphURI != null) ? "GRAPH <" + graphURI + "> { " : "") + " \n");
queryBuff.append(patternBuff);
if (graphURI != null) {
queryBuff.append(" } \n");
}
queryBuff.append("} WHERE { \n");
if (graphURI != null) {
queryBuff.append(" GRAPH <" + graphURI + "> { \n");
}
queryBuff.append(patternBuff);
if (graphURI != null) {
queryBuff.append(" } \n");
}
queryBuff.append("} \n");
log.debug(queryBuff.toString());
graph.executeUpdate(queryBuff.toString());
}
