/**
* Takes a concept and adds
*
* @return
*/
public static Concept createPropertyQuery(Concept concept) {
Collection<Var> vars = PatternVars.vars(concept.getElement());
List<String> varNames = VarUtils.getVarNames(vars);
Var s = concept.getVar();
Generator gen = GeneratorBlacklist.create("v", varNames);
Var p = Var.alloc(gen.next());
Var o = Var.alloc(gen.next());
Triple triple = new Triple(s, p, o);
BasicPattern bp = new BasicPattern();
bp.add(triple);
List<Element> elements;
if (concept.isSubjectConcept()) {
elements = new ArrayList<Element>();
} else {
elements = concept.getElements();
}
elements.add(new ElementTriplesBlock(bp));
Concept result = new Concept(elements, p);
return result;
}
public void visit(OpProject opProject) {
Configuration conf = new Configuration();
FileSystem fs = null;
try {
fs = FileSystem.get(conf);
Path out = new Path("output");
if (!fs.exists(out)) {
fs.delete(out, true);
fs.mkdirs(out);
}
} catch (IOException e) {
e.printStackTrace();
}
// Iterator<Triple> it = opBGP.getPattern().getList().iterator();
/*String[] Q1 = new String[opBGP.getPattern().getList().size()];
int i =0;
while(it.hasNext()){
Triple t = it.next();
Q1[i]=t.getSubject().toString(false)+"$^^$"+t.getPredicate().toString(false)+"$^^$"+t.getObject().toString(false);
System.out.print(t.getSubject().toString(false));
System.out.print(t.getPredicate().toString(false));
System.out.print(t.getObject().toString(false));
System.out.println();
i++;
}*/
/*Object[] Qo = opBGP.getPattern().getList().toArray();
String[] Q = new String[Qo.length];
for (int i = 0; i < Qo.length; i++) {
System.out.println(Qo[i].toString());
Q[i]=Qo[i].toString();
}*/
/*Iterator<Var> it2 = vars.iterator();
String[] vs = new String[vars.size()];
i =0;
while(it2.hasNext()){
Var v = it2.next();
vs[i]=v.toString();
i++;
//System.out.println(v.toString());
}*/
// Set<Var> vars=query.getQueryPattern().varsMentioned(); deprecated
/*Object[] v1 = vars.toArray();
String[] vs = new String[v1.length];
for (int i = 0; i < v1.length; i++) {
System.out.println(v1[i].toString());
vs[i]=v1[i].toString();
}*/
Triple[] Q = new Triple[0];
Q = opBGP.getPattern().getList().toArray(Q);
Set<Var> vars = PatternVars.vars(query.getQueryPattern());
JoinPlaner.setid(id);
JoinPlaner.newVaRS(vars);
try {
JoinPlaner.form(Q);
JoinPlaner.removeNonJoiningVaribles(Q);
int i = 0;
while (!JoinPlaner.isEmpty()) {
String v = JoinPlaner.getNextJoin();
System.out.println(v);
i++;
}
if (i == 0) {
Path outFile = new Path("output/Join_" + id + "_" + 0);
if (fs.exists(outFile)) {
fs.delete(outFile, true);
}
QueryProcessor.executeSelect(Q[0], fs.create(outFile), "P0");
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}