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package uk.ac.ox.cs.pagoda.query;
import com.google.gson.*;
import org.semanticweb.HermiT.model.Constant;
import org.semanticweb.HermiT.model.Individual;
import org.semanticweb.HermiT.model.Term;
import org.semanticweb.HermiT.model.Variable;
import uk.ac.ox.cs.JRDFox.JRDFStoreException;
import uk.ac.ox.cs.JRDFox.model.Datatype;
import uk.ac.ox.cs.JRDFox.model.GroundTerm;
import uk.ac.ox.cs.JRDFox.model.Literal;
import uk.ac.ox.cs.JRDFox.store.TupleIterator;
import uk.ac.ox.cs.pagoda.util.Namespace;
import java.lang.reflect.Type;
import java.util.HashMap;
import java.util.Map;
import java.util.StringTokenizer;
public class AnswerTuple {
public static final String SEPARATOR = "\t";
String m_str = null;
GroundTerm[] m_tuple;
public AnswerTuple(TupleIterator iter, int arity) {
m_tuple = new GroundTerm[arity];
try {
for (int i = 0; i < arity; ++i)
m_tuple[i] = iter.getGroundTerm(i);
} catch (JRDFStoreException e) {
e.printStackTrace();
}
}
public AnswerTuple(GroundTerm[] terms) {
m_tuple = terms;
}
// private AnswerTuple(String m_str) {
// this.m_str = m_str;
// }
private AnswerTuple(AnswerTuple sup, int arity) {
m_tuple = new GroundTerm[arity];
for(int i = 0; i < arity; ++i) m_tuple[i] = sup.m_tuple[i];
}
/**
* It returns the first argument if its arity equals length, a new AnswerTuple otherwise.
*/
public static AnswerTuple create(AnswerTuple extendedTuple, int length) {
if(length == extendedTuple.getArity()) return extendedTuple;
else return new AnswerTuple(extendedTuple, length);
}
public int getArity() {
return m_tuple.length;
}
public int hashCode() {
// return toString().hashCode();
int code = 0;
for (int i = 0; i < m_tuple.length; ++i)
code = code * 1997 + m_tuple[i].hashCode();
return code;
}
public boolean equals(Object obj) {
if (!(obj instanceof AnswerTuple)) return false;
AnswerTuple that = (AnswerTuple) obj;
if (m_tuple.length != that.m_tuple.length) return false;
for (int i = 0; i < m_tuple.length; ++i)
if (!m_tuple[i].equals(that.m_tuple[i]))
return false;
return true;
// return toString().equals(obj.toString());
}
public String toString() {
if(m_str != null) return m_str;
StringBuilder sb = new StringBuilder();
for (int i = 0; i < m_tuple.length; ++i) {
if (sb.length() != 0) sb.append(SEPARATOR);
if (m_tuple[i] instanceof uk.ac.ox.cs.JRDFox.model.Individual)
sb.append("<").append(((uk.ac.ox.cs.JRDFox.model.Individual) m_tuple[i]).getIRI()).append(">");
else if (m_tuple[i] instanceof uk.ac.ox.cs.JRDFox.model.BlankNode) {
sb.append(m_tuple[i].toString());
}
else {
Literal l = (Literal) m_tuple[i];
sb.append('"').append(l.getLexicalForm()).append("\"");
if (!l.getDatatype().equals(Datatype.XSD_STRING) && !l.getDatatype().equals(Datatype.RDF_PLAIN_LITERAL))
sb.append("^^<").append(l.getDatatype().getIRI()).append(">");
}
}
return m_str = sb.toString();
}
public GroundTerm getGroundTerm(int i) {
return m_tuple[i];
}
public Map<Variable, Term> getAssignment(String[] vars) {
Map<Variable, Term> map = new HashMap<Variable, Term>();
int index = 0;
Term t;
for (String var: vars) {
if(m_tuple[index] instanceof uk.ac.ox.cs.JRDFox.model.Individual)
t = Individual.create((((uk.ac.ox.cs.JRDFox.model.Individual) m_tuple[index]).getIRI()));
else {
uk.ac.ox.cs.JRDFox.model.Literal l = (uk.ac.ox.cs.JRDFox.model.Literal) m_tuple[index];
t = Constant.create(l.getLexicalForm(), l.getDatatype().getIRI());
}
map.put(Variable.create(var), t);
++index;
}
return map;
}
public boolean hasAuxPredicate() {
String iri;
for (int i = 0; i < m_tuple.length; ++i)
if ((m_tuple[i] instanceof uk.ac.ox.cs.JRDFox.model.Individual)) {
iri = ((uk.ac.ox.cs.JRDFox.model.Individual) m_tuple[i]).getIRI();
if(iri.startsWith(Namespace.PAGODA_AUX) || iri.contains("_AUX") || iri.contains("_neg") || iri.contains("internal:def"))
return true;
}
return false;
}
public boolean hasAnonymousIndividual() {
String iri;
for(int i = 0; i < m_tuple.length; ++i)
if((m_tuple[i] instanceof uk.ac.ox.cs.JRDFox.model.Individual)) {
iri = ((uk.ac.ox.cs.JRDFox.model.Individual) m_tuple[i]).getIRI();
if(iri.startsWith(Namespace.PAGODA_ANONY) || iri.startsWith(Namespace.KARMA_ANONY))
return true;
}
return false;
}
public static class AnswerTupleSerializer implements JsonSerializer<AnswerTuple> {
public JsonElement serialize(AnswerTuple src, Type typeOfSrc, JsonSerializationContext context) {
return new JsonPrimitive(src.toString());
}
}
public static class AnswerTupleDeserializer implements JsonDeserializer<AnswerTuple> {
public AnswerTuple deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
throws JsonParseException {
String tuplesString = json.getAsJsonPrimitive().getAsString();
// StringTokenizer tokenizer = new StringTokenizer(tuplesString, SEPARATOR);
StringTokenizer tokenizer = new StringTokenizer(tuplesString);
int tokensCount = tokenizer.countTokens();
GroundTerm[] terms = new GroundTerm[tokensCount];
// TODO test parsing
for(int i = 0; i < tokensCount; i++) {
String token = tokenizer.nextToken();
if (token.charAt(0) == '<') {
terms[i] = uk.ac.ox.cs.JRDFox.model.Individual.create(token.substring(1,token.length()-1));
}
else if (token.charAt(0) == '"') {
Datatype datatype;
String lexicalForm;
if(token.contains("^^")) {
String[] lexicalFormAndType = token.split("^^");
lexicalForm = lexicalFormAndType[0];
datatype = Datatype.value(lexicalFormAndType[1]);
}
else {
lexicalForm = token.substring(1, token.length() - 1);
// TODO check
// datatype = token.contains("@") ? Datatype.RDF_PLAIN_LITERAL : Datatype.XSD_STRING;
datatype = Datatype.XSD_STRING;
}
terms[i] = uk.ac.ox.cs.JRDFox.model.Literal.create(lexicalForm, datatype);
}
else {
terms[i] = uk.ac.ox.cs.JRDFox.model.BlankNode.create(token);
}
}
return new AnswerTuple(terms);
}
}
}
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