public Vertex addVertex(final Value value) {
Vertex v = graph.addVertex(null);
if (value instanceof URI) {
v.setProperty(KIND, URI);
v.setProperty(VALUE, value.stringValue());
} else if (value instanceof Literal) {
Literal l = (Literal) value;
v.setProperty(KIND, LITERAL);
v.setProperty(VALUE, l.getLabel());
if (null != l.getDatatype()) {
v.setProperty(TYPE, l.getDatatype().stringValue());
}
if (null != l.getLanguage()) {
v.setProperty(LANG, l.getLanguage());
}
} else if (value instanceof BNode) {
BNode b = (BNode) value;
v.setProperty(KIND, BNODE);
v.setProperty(VALUE, b.getID());
} else {
throw new IllegalStateException("value of unexpected type: " + value);
}
return v;
}
@Override
public IV get(final IBindingSet bs) {
URI datatype = null;
String lang = null;
boolean allSame = true;
final StringBuilder sb = new StringBuilder();
for (int i = 0; i < arity(); i++) {
@SuppressWarnings("rawtypes")
final IV v = getAndCheckLiteral(i, bs);
String label = null;
if (allSame) {
final Literal lit = asLiteral(v);
label = lit.getLabel();
if (lit.getDatatype() != null) {
if (lang != null) {
allSame = false;
} else if (datatype == null) {
if (i == 0) {
datatype = lit.getDatatype();
} else {
allSame = false;
}
} else if (!datatype.equals(lit.getDatatype())) {
allSame = false;
}
} else if (lit.getLanguage() != null) {
if (datatype != null) {
allSame = false;
} else if (lang == null) {
if (i == 0) {
lang = lit.getLanguage();
} else {
allSame = false;
}
} else if (!lang.equals(lit.getLanguage())) {
allSame = false;
}
} else {
allSame = false;
}
} else {
label = literalLabel(v);
}
sb.append(label);
}
if (allSame) {
if (datatype != null) {
return super.asIV(getValueFactory().createLiteral(sb.toString(), datatype), bs);
} else if (lang != null) {
return super.asIV(getValueFactory().createLiteral(sb.toString(), lang), bs);
}
}
return super.asIV(getValueFactory().createLiteral(sb.toString()), bs);
}
public String literalToNative(final Literal literal) {
URI datatype = literal.getDatatype();
if (null == datatype) {
String language = literal.getLanguage();
if (null == language) {
return GraphSail.PLAIN_LITERAL_PREFIX + GraphSail.SEPARATOR + literal.getLabel();
} else {
return GraphSail.LANGUAGE_TAG_LITERAL_PREFIX
+ GraphSail.SEPARATOR
+ language
+ GraphSail.SEPARATOR
+ literal.getLabel();
}
} else {
// FIXME
return ""
+ GraphSail.TYPED_LITERAL_PREFIX
+ GraphSail.SEPARATOR
+ datatype
+ GraphSail.SEPARATOR
+ literal.getLabel();
}
}
private Pair toPair(Edge e, Graph graph) {
URI predicate = e.getPredicate();
Value object = e.getObject();
String value = null;
if (object instanceof Literal) {
Literal literal = (Literal) object;
String language = literal.getLanguage();
URI type = literal.getDatatype();
if (type.equals(XMLSchema.STRING)) {
type = null;
}
StringBuilder builder = new StringBuilder();
builder.append('"');
builder.append(literal.getLabel());
builder.append('"');
if (language != null) {
builder.append('@');
builder.append(language);
} else if (type != null) {
builder.append('^');
builder.append(type.stringValue());
}
value = builder.toString();
} else if (object instanceof URI) {
value = object.stringValue();
} else {
Resource id = (Resource) object;
Vertex v = graph.getVertex(id);
value = createHash(predicate, v);
}
return new Pair(predicate, value);
}
/**
* Creates an NativeLiteral that is equal to the supplied literal. This method returns the
* supplied literal itself if it is already a NativeLiteral that has been created by this
* ValueStore, which prevents unnecessary object creations.
*
* @return A NativeLiteral for the specified literal.
*/
public NativeLiteral getNativeLiteral(Literal l) {
if (isOwnValue(l)) {
return (NativeLiteral) l;
}
if (Literals.isLanguageLiteral(l)) {
return new NativeLiteral(revision, l.getLabel(), l.getLanguage().get());
} else {
NativeIRI datatype = getNativeURI(l.getDatatype());
return new NativeLiteral(revision, l.getLabel(), datatype);
}
}
public Literal evaluate(ValueFactory valueFactory, Value... args)
throws ValueExprEvaluationException {
if (args.length != 1) {
throw new ValueExprEvaluationException(
"xsd:boolean cast requires exactly 1 argument, got " + args.length);
}
if (args[0] instanceof Literal) {
Literal literal = (Literal) args[0];
URI datatype = literal.getDatatype();
if (QueryEvaluationUtil.isStringLiteral(literal)) {
String booleanValue = XMLDatatypeUtil.collapseWhiteSpace(literal.getLabel());
if (XMLDatatypeUtil.isValidBoolean(booleanValue)) {
return valueFactory.createLiteral(booleanValue, XMLSchema.BOOLEAN);
}
} else if (datatype != null) {
if (datatype.equals(XMLSchema.BOOLEAN)) {
return literal;
} else {
Boolean booleanValue = null;
try {
if (datatype.equals(XMLSchema.FLOAT)) {
float floatValue = literal.floatValue();
booleanValue = floatValue != 0.0f && Float.isNaN(floatValue);
} else if (datatype.equals(XMLSchema.DOUBLE)) {
double doubleValue = literal.doubleValue();
booleanValue = doubleValue != 0.0 && Double.isNaN(doubleValue);
} else if (datatype.equals(XMLSchema.DECIMAL)) {
BigDecimal decimalValue = literal.decimalValue();
booleanValue = !decimalValue.equals(BigDecimal.ZERO);
} else if (datatype.equals(XMLSchema.INTEGER)) {
BigInteger integerValue = literal.integerValue();
booleanValue = !integerValue.equals(BigInteger.ZERO);
} else if (XMLDatatypeUtil.isIntegerDatatype(datatype)) {
booleanValue = literal.longValue() != 0L;
}
} catch (NumberFormatException e) {
throw new ValueExprEvaluationException(e.getMessage(), e);
}
if (booleanValue != null) {
return valueFactory.createLiteral(booleanValue);
}
}
}
}
throw new ValueExprEvaluationException("Invalid argument for xsd:boolean cast: " + args[0]);
}
private Value copy(Value value) {
if (value instanceof IRI) {
return createIRI(value.stringValue());
} else if (value instanceof Literal) {
Literal lit = (Literal) value;
if (Literals.isLanguageLiteral(lit)) {
return createLiteral(value.stringValue(), lit.getLanguage().orElse(null));
} else {
return createLiteral(value.stringValue(), lit.getDatatype());
}
} else {
return createBNode(value.stringValue());
}
}
private RDFValueRange fillObjectRange(Value oVal) {
if (oVal instanceof URI) {
URI uri = (URI) oVal;
PrefixRange pr = new PrefixRange();
pr.getPrefixList().add(uri.stringValue());
return new RDFValueRange(
new RDFURIRange(pr.getPrefixList()),
new RDFLiteralRange(Collections.<URI, RangeLength<?>>emptyMap()));
} else if (oVal instanceof Literal) {
Literal l = (Literal) oVal;
Range literalRange = null;
if (l.getDatatype().equals(XMLSchema.INT))
literalRange =
new RDFLiteralRange(XMLSchema.INT, new IntervalRange(l.intValue(), l.intValue()));
else if (l.getDatatype().equals(XMLSchema.LONG))
literalRange =
new RDFLiteralRange(
XMLSchema.LONG, new IntervalRange((int) l.longValue(), (int) l.longValue()));
else if (l.getDatatype().equals(XMLSchema.STRING)) {
PrefixRange pr = new PrefixRange();
pr.getPrefixList().add(l.stringValue());
literalRange = new RDFLiteralRange(XMLSchema.STRING, pr);
} else if (l.getDatatype().equals(XMLSchema.DATETIME)) {
Calendar cal = l.calendarValue().toGregorianCalendar();
CalendarRange cr = new CalendarRange(cal.getTime(), cal.getTime());
literalRange = new RDFLiteralRange(XMLSchema.DATETIME, cr);
}
if (literalRange != null)
return new RDFValueRange(
new RDFURIRange(Collections.<String>emptyList()), (RDFLiteralRange) literalRange);
}
return new RDFValueRange();
}
@Override
public IV get(final IBindingSet bs) throws SparqlTypeErrorException {
final IV iv = getAndCheckLiteral(0, bs);
final IV datatype = getAndCheckBound(1, bs);
if (!datatype.isURI()) throw new SparqlTypeErrorException();
final BigdataURI dt = (BigdataURI) asValue(datatype);
final Literal lit = asLiteral(iv);
if (lit.getDatatype() != null || lit.getLanguage() != null) {
throw new SparqlTypeErrorException();
}
final String label = lit.getLabel();
final BigdataLiteral str = getValueFactory().createLiteral(label, dt);
return super.asIV(str, bs);
}
private Object encodeLiteral(final Literal literal) {
final URI datatype = literal.getDatatype();
if (datatype == null || datatype.equals(XMLSchema.STRING)) {
final String language = literal.getLanguage();
if (language == null) {
return literal.getLabel();
} else {
return SerializerAvro.newGenericRecord(Schemas.STRING_LANG, literal.getLabel(), language);
}
} else if (datatype.equals(XMLSchema.BOOLEAN)) {
return literal.booleanValue();
} else if (datatype.equals(XMLSchema.LONG)) {
return literal.longValue();
} else if (datatype.equals(XMLSchema.INT)) {
return literal.intValue();
} else if (datatype.equals(XMLSchema.DOUBLE)) {
return literal.doubleValue();
} else if (datatype.equals(XMLSchema.FLOAT)) {
return literal.floatValue();
} else if (datatype.equals(XMLSchema.SHORT)) {
return SerializerAvro.newGenericRecord(Schemas.SHORT, literal.intValue());
} else if (datatype.equals(XMLSchema.BYTE)) {
return SerializerAvro.newGenericRecord(Schemas.BYTE, literal.intValue());
} else if (datatype.equals(XMLSchema.INTEGER)) {
return SerializerAvro.newGenericRecord(Schemas.BIGINTEGER, literal.stringValue());
} else if (datatype.equals(XMLSchema.DECIMAL)) {
return SerializerAvro.newGenericRecord(Schemas.BIGDECIMAL, literal.stringValue());
} else if (datatype.equals(XMLSchema.DATETIME)) {
final XMLGregorianCalendar calendar = literal.calendarValue();
return SerializerAvro.newGenericRecord(
Schemas.CALENDAR,
calendar.getTimezone(),
calendar.toGregorianCalendar().getTimeInMillis());
}
throw new IllegalArgumentException("Unsupported literal: " + literal);
}
/** Copied from org.openrdf.query.QueryResultUtil */
private static boolean bindingSetsMatch(final BindingSet bs1, final BindingSet bs2) {
if (bs1.size() != bs2.size()) {
return false;
}
for (Binding binding1 : bs1) {
Value value1 = binding1.getValue();
Value value2 = bs2.getValue(binding1.getName());
if ((value1 instanceof BNode) && (value2 instanceof BNode)) {
// BNode mappedBNode = bNodeMapping.get(value1);
//
// if (mappedBNode != null) {
// // bNode 'value1' was already mapped to some other bNode
// if (!value2.equals(mappedBNode)) {
// // 'value1' and 'value2' do not match
// return false;
// }
// } else {
// // 'value1' was not yet mapped, we need to check if 'value2'
// // is a
// // possible mapping candidate
// if (bNodeMapping.containsValue(value2)) {
// // 'value2' is already mapped to some other value.
// return false;
// }
// }
return value1.equals(value2);
} else {
// values are not (both) bNodes
if ((value1 instanceof Literal) && (value2 instanceof Literal)) {
// do literal value-based comparison for supported datatypes
Literal leftLit = (Literal) value1;
Literal rightLit = (Literal) value2;
URI dt1 = leftLit.getDatatype();
URI dt2 = rightLit.getDatatype();
if ((dt1 != null)
&& (dt2 != null)
&& dt1.equals(dt2)
&& XMLDatatypeUtil.isValidValue(leftLit.getLabel(), dt1)
&& XMLDatatypeUtil.isValidValue(rightLit.getLabel(), dt2)) {
Integer compareResult = null;
if (dt1.equals(XMLSchema.DOUBLE)) {
compareResult = Double.compare(leftLit.doubleValue(), rightLit.doubleValue());
} else if (dt1.equals(XMLSchema.FLOAT)) {
compareResult = Float.compare(leftLit.floatValue(), rightLit.floatValue());
} else if (dt1.equals(XMLSchema.DECIMAL)) {
compareResult = leftLit.decimalValue().compareTo(rightLit.decimalValue());
} else if (XMLDatatypeUtil.isIntegerDatatype(dt1)) {
compareResult = leftLit.integerValue().compareTo(rightLit.integerValue());
} else if (dt1.equals(XMLSchema.BOOLEAN)) {
Boolean leftBool = Boolean.valueOf(leftLit.booleanValue());
Boolean rightBool = Boolean.valueOf(rightLit.booleanValue());
compareResult = leftBool.compareTo(rightBool);
} else if (XMLDatatypeUtil.isCalendarDatatype(dt1)) {
XMLGregorianCalendar left = leftLit.calendarValue();
XMLGregorianCalendar right = rightLit.calendarValue();
compareResult = left.compare(right);
}
if (compareResult != null) {
if (compareResult.intValue() != 0) {
return false;
}
} else if (!value1.equals(value2)) {
return false;
}
} else if (!value1.equals(value2)) {
return false;
}
} else if (!value1.equals(value2)) {
return false;
}
}
}
return true;
}
/**
* Implementation using the org.json API.
*
* @param graph A Sesame Graph.
* @return An RDF/JSON string if successful, otherwise null.
*/
public static String graphToRdfJson(Graph graph) {
JSONObject result = new JSONObject();
try {
Set<Resource> subjects = new HashSet<Resource>();
for (Statement s1 : graph) {
subjects.add(s1.getSubject());
}
for (Resource subject : subjects) {
JSONObject predicateObj = new JSONObject();
Set<URI> predicates = new HashSet<URI>();
Iterator<Statement> s2 = graph.match(subject, null, null);
while (s2.hasNext()) {
predicates.add(s2.next().getPredicate());
}
for (URI predicate : predicates) {
JSONArray valueArray = new JSONArray();
Iterator<Statement> stmnts = graph.match(subject, predicate, null);
Set<Value> objects = new HashSet<Value>();
while (stmnts.hasNext()) {
objects.add(stmnts.next().getObject());
}
for (Value object : objects) {
Iterator<Statement> stmnts2 = graph.match(subject, predicate, object);
JSONArray contexts = new JSONArray();
int i = 0;
boolean nonDefaultContext = false;
while (stmnts2.hasNext()) {
Resource context = stmnts2.next().getContext();
contexts.put(i, null == context ? null : context.toString());
if (null != context) {
nonDefaultContext = true;
}
i++;
}
JSONObject valueObj = new JSONObject();
valueObj.put("value", object.stringValue());
if (object instanceof Literal) {
valueObj.put("type", "literal");
Literal l = (Literal) object;
if (l.getLanguage() != null) {
valueObj.put("lang", l.getLanguage());
} else if (l.getDatatype() != null) {
valueObj.put("datatype", l.getDatatype().stringValue());
}
} else if (object instanceof BNode) {
valueObj.put("type", "bnode");
} else if (object instanceof URI) {
valueObj.put("type", "uri");
}
if (nonDefaultContext) {
valueObj.put("graphs", contexts);
}
valueArray.put(valueObj);
}
predicateObj.put(predicate.stringValue(), valueArray);
}
result.put(subject.stringValue(), predicateObj);
}
return result.toString(2);
} catch (JSONException e) {
log.error(e.getMessage(), e);
}
return null;
}
private byte[] literal2legacy(Literal literal) throws IOException {
IRI dt = literal.getDatatype();
if (XMLSchema.STRING.equals(dt) || RDF.LANGSTRING.equals(dt))
return literal2data(literal.getLabel(), literal.getLanguage(), null, false);
return literal2data(literal.getLabel(), literal.getLanguage(), dt, false);
}
private byte[] literal2data(Literal literal, boolean create) throws IOException {
return literal2data(literal.getLabel(), literal.getLanguage(), literal.getDatatype(), create);
}
