/** Encoding of a node so it can be reconstructed */
public static String serialize(Node n, String base, PrefixMap prefixMap) {
// See also Nodec.
// See also OutputLangUtils - merge and this is a buffering call.
if (n == null) return "<<null>>";
if (n.isBlank()) {
String str = n.getBlankNodeLabel();
// c.f. OutputLangUtils
if (onlySafeBNodeLabels) str = safeBNodeLabel(str);
return "_:" + str;
}
if (n.isLiteral()) return FmtUtils.stringForLiteral((Node_Literal) n, null);
if (n.isURI()) {
String uri = n.getURI();
return stringForURI(uri, base, prefixMap);
}
// Safe name?
if (n.isVariable()) return "?" + n.getName();
//
// if ( n.equals(Node.ANY) )
// return "ANY" ;
throw new TDBException("Failed to turn a node into a string: " + n);
// return null ;
}
@Override
public NodeValue exec(NodeValue v) {
// http://www.w3.org/TR/xpath-functions/#casting
String s = null;
Node n = v.asNode();
if (n.isBlank()) throw new ExprEvalException("CastXSD: Can't cast blank nodes: " + v);
if (n.isURI()) {
if (castType.equals(XSDDatatype.XSDstring)) s = n.getURI();
else
throw new ExprEvalException(
"CastXSD: Can't cast node: " + v + " to " + castType.getURI());
} else if (n.isLiteral())
// What if there is a lang tag?
s = n.getLiteralLexicalForm();
else
throw new ExprEvalException(
"CastXSD: Can't cast node: " + v + "(not a literal, not URI to string)");
if (s == null && v.isString()) s = v.getString();
if (s == null)
throw new ExprEvalException("CastXSD: Can't cast: " + v + "(has no string appearance)");
// // Special case - non-normalised xsd:booleans use 0 and 1.
// if ( v.isBoolean() )
// {
// if ( s.equals("0") ) s = "false" ;
// if ( s.equals("1") ) s = "true" ;
// }
NodeValue r = cast(s, v, castType);
return r;
}
private void writeNode(RDFNode node) throws IOException {
Node n = node.asNode();
if (n.isURI()) {
write(" <uri>" + escape(n.getURI()) + "</uri>\n");
return;
}
if (n.isBlank()) {
write(" <id>" + escape(n.getBlankNodeId().toString()) + "</id>\n");
return;
}
if (!n.isLiteral()) {
throw new JenaException("Don't know how to serialize node " + n);
}
if (n.getLiteral().getDatatypeURI() != null) {
write(
" <typedLiteral datatype=\""
+ escape(n.getLiteral().getDatatypeURI())
+ "\">"
+ escape(n.getLiteral().getLexicalForm())
+ "</typedLiteral>\n");
return;
}
if (n.getLiteral().language() == null || "".equals(n.getLiteral().language())) {
write(" <plainLiteral>" + escape(n.getLiteral().getLexicalForm()) + "</plainLiteral>\n");
return;
}
write(
" <plainLiteral xml:lang=\""
+ n.getLiteral().language()
+ "\">"
+ escape(n.getLiteral().getLexicalForm())
+ "</plainLiteral>\n");
}
public static Node iri(Node nv, String baseIRI) {
if (nv.isURI()) return nv;
if (nv.isBlank()) {
// Skolemization of blank nodes to IRIs : Don't ask, just don't ask.
String x = nv.getBlankNodeLabel();
return Node.createURI("_:" + x);
}
if (nv.isLiteral() && nv.getLiteralDatatype() == null && nv.getLiteralLanguage().equals("")) {
// Plain literal
IRI iri = null;
String iriStr = nv.getLiteralLexicalForm();
// Level of checking?
if (baseIRI != null) {
IRI base = iriFactory.create(baseIRI);
iri = base.create(iriStr);
} else iri = iriFactory.create(iriStr);
if (!iri.isAbsolute()) throw new ExprEvalException("Relative IRI string: " + iriStr);
if (warningsForIRIs && iri.hasViolation(false)) {
String msg = "unknown violation from IRI library";
Iterator<Violation> iter = iri.violations(false);
if (iter.hasNext()) {
Violation viol = iter.next();
msg = viol.getShortMessage();
}
Log.warn(NodeFunctions.class, "Bad IRI: " + msg + ": " + iri);
}
return Node.createURI(iri.toString());
}
throw new ExprEvalException("Can't make an IRI from " + nv);
}
/**
* Gets Jena statement selector corresponding to the NXRelations statement.
*
* @param graph the jena graph
* @param nuxStatement NXRelations statement
* @return jena statement selector
*/
private static SimpleSelector getJenaSelector(Model graph, Statement nuxStatement) {
com.hp.hpl.jena.rdf.model.Resource subjResource = null;
com.hp.hpl.jena.graph.Node subject = getJenaNode(nuxStatement.getSubject());
if (subject != null && subject.isURI()) {
subjResource = graph.getResource(subject.getURI());
}
Property predProp = null;
com.hp.hpl.jena.graph.Node predicate = getJenaNode(nuxStatement.getPredicate());
if (predicate != null && predicate.isURI()) {
predProp = graph.getProperty(predicate.getURI());
}
com.hp.hpl.jena.graph.Node object = getJenaNode(nuxStatement.getObject());
RDFNode objRDF = null;
if (object != null) {
objRDF = graph.asRDFNode(object);
}
return new SimpleSelector(subjResource, predProp, objRDF);
}
public static String str(Node node) {
if (node.isLiteral()) return node.getLiteral().getLexicalForm();
if (node.isURI()) return node.getURI();
// if ( node.isBlank() ) return node.getBlankNodeId().getLabelString() ;
// if ( node.isBlank() ) return "" ;
if (node.isBlank()) NodeValue.raise(new ExprTypeException("Blank node: " + node));
NodeValue.raise(new ExprEvalException("Not a string: " + node));
return "[undef]";
}
private static boolean matchNode(Item node, Item item, Match details) {
if (isAny(item)) {
details.anyMatches++;
return true;
}
if (isAnyVar(item)) {
details.varMatches++;
return true;
}
if (node.isSymbol()) {
// TERM in the thing to be matched means something concrete will be there.
if (node.equals(TERM)) {
if (item.equals(TERM)) {
details.termMatches++;
return true;
}
// Does not match LITERAL, URI, BNODE and VAR/ANY were done above.
return false;
}
throw new ARQException("StatsMatcher: unexpected slot type: " + node);
}
if (!node.isNode()) return false;
Node n = node.getNode();
if (n.isConcrete()) {
if (item.isNode() && item.getNode().equals(n)) {
details.exactMatches++;
return true;
}
if (isAnyTerm(item)) {
details.termMatches++;
return true;
}
if (isAnyURI(item) && n.isURI()) {
details.termMatches++;
return true;
}
if (isAnyLiteral(item) && n.isLiteral()) {
details.termMatches++;
return true;
}
if (isAnyBNode(item) && n.isBlank()) {
details.termMatches++;
return true;
}
}
return false;
}
private Node walkTree(
Model model,
Dataset oldDataset,
Node node,
Node predicate,
Query query,
QuerySolution initialBinding,
Set<Node> reached) {
QuerySolutionMap localBinding = new QuerySolutionMap();
localBinding.addAll(initialBinding);
localBinding.add("arg1", model.asRDFNode(node));
Dataset dataset = new DatasetWithDifferentDefaultModel(model, oldDataset);
QueryExecution qexec = ARQFactory.get().createQueryExecution(query, dataset, localBinding);
ResultSet rs = qexec.execSelect();
try {
if (rs.hasNext()) {
List<String> resultVars = rs.getResultVars();
String varName = resultVars.get(0);
RDFNode resultNode = rs.next().get(varName);
if (resultNode != null) {
return resultNode.asNode();
}
}
} finally {
qexec.close();
}
// Recurse into parents
ExtendedIterator<Triple> it = createIterator(model.getGraph(), node, predicate);
try {
while (it.hasNext()) {
Node next = getNext(it.next());
if ((next.isBlank() || next.isURI()) && !reached.contains(next)) {
reached.add(next);
Node nextResult =
walkTree(model, oldDataset, next, predicate, query, initialBinding, reached);
if (nextResult != null) {
return nextResult;
}
}
}
} finally {
it.close();
}
return null;
}
public SPDXChecksum(Model spdxModel, Node checksumNode) throws InvalidSPDXAnalysisException {
this.model = spdxModel;
this.checksumNode = checksumNode;
if (checksumNode.isBlank()) {
checksumResource = model.createResource(checksumNode.getBlankNodeId());
} else if (checksumNode.isURI()) {
checksumResource = model.createResource(checksumNode.getURI());
} else {
throw (new InvalidSPDXAnalysisException("Checksum node can not be a literal"));
}
// Algorithm
Node p =
spdxModel
.getProperty(SpdxRdfConstants.SPDX_NAMESPACE, SpdxRdfConstants.PROP_CHECKSUM_ALGORITHM)
.asNode();
Triple m = Triple.createMatch(checksumNode, p, null);
ExtendedIterator<Triple> tripleIter = spdxModel.getGraph().find(m);
while (tripleIter.hasNext()) {
Triple t = tripleIter.next();
if (t.getObject().isLiteral()) {
// The following is for compatibility with rdf generated with older
// versions of the tool
this.algorithm = t.getObject().toString(false);
} else if (t.getObject().isURI()) {
this.algorithm = URI_TO_ALGORITHM.get(t.getObject().getURI());
if (this.algorithm == null) {
this.algorithm = "UNKNOWN";
}
} else {
throw (new InvalidSPDXAnalysisException(
"Invalid checksum algorithm - must be one of the defined algorithms supported by SPDX."));
}
}
// value
p =
spdxModel
.getProperty(SpdxRdfConstants.SPDX_NAMESPACE, SpdxRdfConstants.PROP_CHECKSUM_VALUE)
.asNode();
m = Triple.createMatch(checksumNode, p, null);
tripleIter = spdxModel.getGraph().find(m);
while (tripleIter.hasNext()) {
Triple t = tripleIter.next();
this.value = t.getObject().toString(false);
}
}
public void compute(Quad quad) {
// logger.debug("Assessing {}", quad.asTriple().toString());
Node predicate = quad.getPredicate(); // retrieve predicate
Node object = quad.getObject(); // retrieve object
// checking if classes are found in the property position
// logger.info("Is the used predicate {} actually a class?", predicate.getURI());
this.totalPropertiesCount++;
if (seenProperties.containsKey(predicate.toString())) {
if (!(seenProperties.get(predicate.toString()))) {
this.misplacedPropertiesCount++;
this.createProblemModel(quad.getSubject(), predicate, DQM.MisplacedClass);
}
} else {
if ((VocabularyLoader.isClass(predicate)) && (VocabularyLoader.checkTerm(predicate))) {
this.misplacedPropertiesCount++;
this.createProblemModel(quad.getSubject(), predicate, DQM.MisplacedClass);
seenProperties.put(predicate.toString(), false);
}
seenProperties.put(predicate.toString(), true);
}
// checking if properties are found in the object position
if ((object.isURI())
&& (predicate.getURI().equals(RDF.type.getURI()))
&& (VocabularyLoader.checkTerm(object))) {
// logger.info("Checking {} for misplaced class", object.getURI());
this.totalClassesCount++;
if (seenClasses.containsKey(object.toString())) {
if (!(seenClasses.get(object.toString()))) {
this.misplacedClassesCount++;
this.createProblemModel(quad.getSubject(), object, DQM.MisplacedProperty);
}
} else {
if (VocabularyLoader.isProperty(object)) {
this.misplacedClassesCount++;
this.createProblemModel(quad.getSubject(), object, DQM.MisplacedProperty);
seenClasses.put(object.toString(), false);
}
seenClasses.put(object.toString(), true);
}
}
}
/**
* Gets NXRelations node instance given Jena node.
*
* @param jenaNodeInst
* @return NXRelations node instance
*/
private Node getNXRelationsNode(com.hp.hpl.jena.graph.Node jenaNodeInst) {
if (jenaNodeInst == null) {
return null;
}
Node nuxNode = null;
if (jenaNodeInst.isBlank()) {
AnonId anonId = jenaNodeInst.getBlankNodeId();
String id = anonId.getLabelString();
nuxNode = NodeFactory.createBlank(id);
} else if (jenaNodeInst.isLiteral()) {
LiteralLabel label = jenaNodeInst.getLiteral();
String value = label.getLexicalForm();
String type = jenaNodeInst.getLiteralDatatypeURI();
String language = jenaNodeInst.getLiteralLanguage();
if (type != "") {
nuxNode = NodeFactory.createTypedLiteral(value, type);
} else if (language != "") {
nuxNode = NodeFactory.createLiteral(value, language);
} else {
nuxNode = NodeFactory.createLiteral(value);
}
} else if (jenaNodeInst.isURI()) {
String uri = jenaNodeInst.getURI();
// try to find corresponding prefix
// TODO AT: maybe take namespaces from relation service?
for (Map.Entry<String, String> ns : namespaces.entrySet()) {
String base = ns.getValue();
if (uri.startsWith(base)) {
String localName = uri.substring(base.length());
nuxNode = NodeFactory.createQNameResource(base, localName);
break;
}
}
if (nuxNode == null) {
// default to resource
nuxNode = NodeFactory.createResource(uri);
}
} else {
throw new IllegalArgumentException(
"Cannot translate non concrete Jena node into NXRelations node");
}
return nuxNode;
}
/**
* Map a Jena graph node to a Mulgara value.
*
* @param x The Jena Node to convert.
* @param session A session to use for blank node persistence.
* @return A Mulgara Value.
* @throws URISyntaxException When creating a URIReference that refers to an invalid URI.
*/
static Value n2v(Node x, Session session) throws URISyntaxException {
if (x.isURI()) return new URIReferenceImpl(new URI(x.getURI()));
if (x.isLiteral()) {
// The return types are Mulgara LiteralImpl
if (x.getLiteralDatatypeURI() != null) {
return new LiteralImpl(x.getLiteralLexicalForm(), new URI(x.getLiteralDatatypeURI()));
}
if (x.getLiteralLanguage() != null) {
return new LiteralImpl(x.getLiteralLexicalForm(), x.getLiteralLanguage());
}
return new LiteralImpl(x.getLiteralLexicalForm());
}
if (x.isBlank()) {
// is this a previously encountered Jena-allocated node?
Value bn = nodesToValues.get(x);
if (bn != null) return bn;
// May be a Mulgara-allocated bNode (and so we we have seen before)
String blankLabel = x.getBlankNodeLabel();
if (blankLabel.startsWith(LABEL)) {
long id = Long.parseLong(blankLabel.substring(LABEL_LEN));
return new BlankNodeImpl(BlankNodeImpl.counterToNode(id));
}
// It's not - it's a Jena one.
if (skolemizedBlankNodes) {
String skol = bNodeScheme + x.getBlankNodeLabel();
return new URIReferenceImpl(new URI(skol));
}
// Not a Mulgara-allocated bNode. Create a new mapping.
BlankNodeImpl v = new BlankNodeImpl();
nodesToValues.put(x, v);
valuesToNodes.put(v.getNodeId(), x);
return v;
}
throw new RuntimeException("Can't convert from Jena node : " + x);
}
private void onePattern(Item elt) {
Item pat = elt.getList().get(0);
if (pat.isNode()) {
// (<uri> weight)
Node n = pat.getNode();
if (!n.isURI()) {
log.warn("Not a preicate URI: " + pat.toString());
return;
}
addAbbreviation(elt);
} else if (pat.isSymbol()) {
if (pat.equals(OTHER)) {
double d = elt.getList().get(1).getDouble();
DefaultMatch = d;
return;
}
if (pat.equals(BNODE) || pat.equals(LITERAL)) {
log.warn("Not a match for a predicate URI: " + pat.toString());
return;
}
if (pat.equals(TERM) || pat.equals(VAR) || pat.equals(ANY)) addAbbreviation(elt);
else {
log.warn("Not understood: " + pat);
return;
}
} else if (pat.isList() && pat.getList().size() == 3) {
// It's of the form ((S P O) weight)
Item w = elt.getList().get(1);
Pattern pattern =
new Pattern(
((Number) (w.getNode().getLiteralValue())).doubleValue(),
intern(pat.getList().get(0)),
intern(pat.getList().get(1)),
intern(pat.getList().get(2)));
addPattern(pattern);
} else {
log.warn("Unrecognized pattern: " + pat);
}
}
/*
* See http://www.w3.org/TR/rdf-sparql-query paragraph 11.4.2
*
* "(ISIRI) Returns true if term is an IRI. Returns false otherwise."
*
* @see http://www.w3.org/TR/rdf-sparql-query
*/
private void convertIsIRI(E_IsIRI expr) {
logger.debug("convertIsIRI " + expr.toString());
expr.getArg().visit(this);
Expression arg = expression.pop();
if (arg instanceof AttributeExprEx) {
AttributeExprEx variable = (AttributeExprEx) arg;
NodeMaker nm = variable.getNodeMaker();
DetermineNodeType filter = new DetermineNodeType();
nm.describeSelf(filter);
expression.push(filter.isLimittedToURIs() ? Expression.TRUE : Expression.FALSE);
} else if (arg instanceof ConstantEx) {
ConstantEx constant = (ConstantEx) arg;
Node node = constant.getNode();
expression.push(node.isURI() ? Expression.TRUE : Expression.FALSE);
} else {
conversionFailed(expr);
}
}
protected static String sparqlNode(Node node, String varName) {
if (node == null || node.isVariable()) {
return varName;
} else if (node.isBlank()) {
return "<fake:blank>"; // or throw exception?
} else if (node.isURI()) {
StringBuffer uriBuff = new StringBuffer();
return uriBuff.append("<").append(node.getURI()).append(">").toString();
} else if (node.isLiteral()) {
StringBuffer literalBuff = new StringBuffer();
literalBuff.append("\"");
pyString(literalBuff, node.getLiteralLexicalForm());
literalBuff.append("\"");
if (node.getLiteralDatatypeURI() != null) {
literalBuff.append("^^<").append(node.getLiteralDatatypeURI()).append(">");
} else if (node.getLiteralLanguage() != null && node.getLiteralLanguage().length() > 0) {
literalBuff.append("@").append(node.getLiteralLanguage());
}
return literalBuff.toString();
} else {
return varName;
}
}
/*
* See http://www.w3.org/TR/rdf-sparql-query paragraph 11.4.11
*
* "(SAMETERM) Returns TRUE if term1 and term2 are the same RDF term as defined
* in Resource Description Framework (RDF): Concepts and Abstract Syntax [CONCEPTS]; returns FALSE otherwise."
*
* @see http://www.w3.org/TR/rdf-sparql-query
* @see http://www.w3.org/TR/rdf-concepts/
*/
private void convertSameTerm(E_SameTerm expr) {
logger.debug("convertSameTerm " + expr.toString());
expr.getArg1().visit(this);
expr.getArg2().visit(this);
Expression e2 = expression.pop();
Expression e1 = expression.pop();
// TODO Expression.FALSE and Expression.TRUE are not constants
if (e1.equals(Expression.FALSE)) e1 = CONSTANT_FALSE;
else if (e1.equals(Expression.TRUE)) e1 = CONSTANT_TRUE;
if (e2.equals(Expression.FALSE)) e2 = CONSTANT_FALSE;
else if (e2.equals(Expression.TRUE)) e2 = CONSTANT_TRUE;
if (e1 instanceof AttributeExprEx && e2 instanceof Constant
|| e2 instanceof AttributeExprEx && e1 instanceof Constant) {
AttributeExprEx variable;
ConstantEx constant;
if (e1 instanceof AttributeExprEx) {
variable = (AttributeExprEx) e1;
constant = (ConstantEx) e2;
} else {
variable = (AttributeExprEx) e2;
constant = (ConstantEx) e1;
}
logger.debug("isEqual(" + variable + ", " + constant + ")");
NodeMaker nm = variable.getNodeMaker();
if (nm instanceof TypedNodeMaker) {
ValueMaker vm = ((TypedNodeMaker) nm).valueMaker();
Node node = constant.getNode();
logger.debug("checking " + node + " with " + nm);
boolean empty = nm.selectNode(node, RelationalOperators.DUMMY).equals(NodeMaker.EMPTY);
logger.debug("result " + new Boolean(empty));
if (!empty) {
if (node.isURI()) expression.push(vm.valueExpression(node.getURI()));
else if (node.isLiteral()) expression.push(vm.valueExpression(constant.value()));
else conversionFailed(expr); // TODO blank nodes?
return;
} else {
expression.push(Expression.FALSE);
return;
}
} else {
logger.warn("nm is not a TypedNodemaker");
}
} else if (e1 instanceof ConstantEx && e2 instanceof ConstantEx) {
logger.debug("isEqual(" + e1 + ", " + e2 + ")");
ConstantEx constant1 = (ConstantEx) e1;
ConstantEx constant2 = (ConstantEx) e2;
boolean equals = NodeFunctions.sameTerm(constant1.getNode(), constant2.getNode());
logger.debug("constants same? " + new Boolean(equals));
expression.push(equals ? Expression.TRUE : Expression.FALSE);
return;
} else if (e1 instanceof AttributeExprEx && e2 instanceof AttributeExprEx) {
logger.debug("isEqual(" + e1 + ", " + e2 + ")");
AttributeExprEx variable1 = (AttributeExprEx) e1;
AttributeExprEx variable2 = (AttributeExprEx) e2;
NodeMaker nm1 = variable1.getNodeMaker();
NodeMaker nm2 = variable2.getNodeMaker();
NodeSetConstraintBuilder nodeSet = new NodeSetConstraintBuilder();
nm1.describeSelf(nodeSet);
nm2.describeSelf(nodeSet);
if (nodeSet.isEmpty()) {
logger.debug("nodes " + nm1 + " " + nm2 + " incompatible");
expression.push(Expression.FALSE);
return;
}
}
expression.push(Equality.create(e1, e2));
}
private void convertNotEquals(E_NotEquals expr) {
logger.debug("convertNotEquals " + expr.toString());
expr.getArg1().visit(this);
expr.getArg2().visit(this);
Expression e2 = expression.pop();
Expression e1 = expression.pop();
// TODO Expression.FALSE and Expression.TRUE are not constants
if (e1.equals(Expression.FALSE)) e1 = CONSTANT_FALSE;
else if (e1.equals(Expression.TRUE)) e1 = CONSTANT_TRUE;
if (e2.equals(Expression.FALSE)) e2 = CONSTANT_FALSE;
else if (e2.equals(Expression.TRUE)) e2 = CONSTANT_TRUE;
if (e1 instanceof AttributeExprEx && e2 instanceof Constant
|| e2 instanceof AttributeExprEx && e1 instanceof Constant) {
AttributeExprEx variable;
ConstantEx constant;
if (e1 instanceof AttributeExprEx) {
variable = (AttributeExprEx) e1;
constant = (ConstantEx) e2;
} else {
variable = (AttributeExprEx) e2;
constant = (ConstantEx) e1;
}
logger.debug("isNotEqual(" + variable + ", " + constant + ")");
NodeMaker nm = variable.getNodeMaker();
if (nm instanceof TypedNodeMaker) {
ValueMaker vm = ((TypedNodeMaker) nm).valueMaker();
Node node = constant.getNode();
logger.debug("checking " + node + " with " + nm);
if (XSD.isNumeric(node)) {
DetermineNodeType filter = new DetermineNodeType();
nm.describeSelf(filter);
RDFDatatype datatype = filter.getDatatype();
if (datatype != null && XSD.isNumeric(datatype)) {
RDFDatatype numericType = XSD.getNumericType(datatype, node.getLiteralDatatype());
nm = cast(nm, numericType);
node = XSD.cast(node, numericType);
}
}
boolean empty = nm.selectNode(node, RelationalOperators.DUMMY).equals(NodeMaker.EMPTY);
logger.debug("result " + new Boolean(empty));
if (!empty) {
if (node.isURI()) expression.push(new Negation(vm.valueExpression(node.getURI())));
else if (node.isLiteral()) {
if (XSD.isSupported(node.getLiteralDatatype()))
expression.push(new Negation(vm.valueExpression(constant.value())));
else // type = boolean or an unknown type
conversionFailed("cannot compare values of type " + node.getLiteralDatatypeURI(), expr);
} else conversionFailed(expr); // TODO blank nodes?
return;
} else {
expression.push(Expression.TRUE);
return;
}
}
} else if (e1 instanceof ConstantEx && e2 instanceof ConstantEx) {
logger.debug("isNotEqual(" + e1 + ", " + e2 + ")");
Node c1 = ((ConstantEx) e1).getNode();
Node c2 = ((ConstantEx) e2).getNode();
boolean equals;
if (XSD.isNumeric(c1) && XSD.isNumeric(c2)) {
RDFDatatype datatype = XSD.getNumericType(c1.getLiteralDatatype(), c2.getLiteralDatatype());
equals = XSD.cast(c1, datatype).equals(XSD.cast(c2, datatype));
} else if (isSimpleLiteral(c1) && isSimpleLiteral(c2)) {
equals = c1.getLiteralValue().equals(c2.getLiteralValue());
} else if (XSD.isString(c1) && XSD.isString(c2)) {
equals = c1.getLiteralValue().equals(c2.getLiteralValue());
} else {
try {
equals = NodeFunctions.rdfTermEquals(c1, c2);
} catch (ExprEvalException e) {
equals = false;
}
}
logger.debug("constants equal? " + new Boolean(equals));
expression.push(equals ? Expression.FALSE : Expression.TRUE);
return;
} else if (e1 instanceof AttributeExprEx && e2 instanceof AttributeExprEx) {
logger.debug("isNotEqual(" + e1 + ", " + e2 + ")");
AttributeExprEx variable1 = (AttributeExprEx) e1;
AttributeExprEx variable2 = (AttributeExprEx) e2;
NodeMaker nm1 = variable1.getNodeMaker();
NodeMaker nm2 = variable2.getNodeMaker();
DetermineNodeType filter1 = new DetermineNodeType();
nm1.describeSelf(filter1);
RDFDatatype datatype1 = filter1.getDatatype();
DetermineNodeType filter2 = new DetermineNodeType();
nm2.describeSelf(filter2);
RDFDatatype datatype2 = filter2.getDatatype();
if (datatype1 != null
&& XSD.isNumeric(datatype1)
&& datatype2 != null
&& XSD.isNumeric(datatype2)) {
RDFDatatype numericType = XSD.getNumericType(filter1.getDatatype(), filter2.getDatatype());
nm1 = cast(nm1, numericType);
nm2 = cast(nm2, numericType);
}
NodeSetConstraintBuilder nodeSet = new NodeSetConstraintBuilder();
nm1.describeSelf(nodeSet);
nm2.describeSelf(nodeSet);
if (nodeSet.isEmpty()) {
logger.debug("nodes " + nm1 + " " + nm2 + " incompatible");
expression.push(Expression.TRUE);
return;
}
}
expression.push(new Negation(Equality.create(e1, e2)));
}
public List<AlphaResultUnion> calculateAlphaSTG(
Collection<Triple> triples, AbstractConceptMapping cm) throws Exception {
List<AlphaResultUnion> alphaResultUnionList = new Vector<AlphaResultUnion>();
Triple firstTriple = triples.iterator().next();
Node tpSubject = firstTriple.getSubject();
SQLLogicalTable alphaSubject = this.calculateAlphaSubject(tpSubject, cm);
// String logicalTableAlias = cm.getLogicalTableAlias();
String logicalTableAlias = alphaSubject.getAlias();
// if(logicalTableAlias == null || logicalTableAlias.equals("")) {
// cm.setLogicalTableAlias(alphaSubject.getAlias());
// }
// mapping projection of corresponding predicates
for (Triple tp : triples) {
Node tpPredicate = tp.getPredicate();
List<SQLJoinTable> alphaPredicateObjects = new Vector<SQLJoinTable>();
List<SQLLogicalTable> alphaPredicateObjects2 = new Vector<SQLLogicalTable>();
if (tpPredicate.isURI()) {
String tpPredicateURI = tpPredicate.getURI();
Collection<String> mappedClassURIs = cm.getMappedClassURIs();
boolean processableTriplePattern = true;
if (tp.getObject().isURI()) {
String objectURI = tp.getObject().getURI();
if (RDF.type.getURI().equals(tpPredicateURI) && mappedClassURIs.contains(objectURI)) {
processableTriplePattern = false;
}
}
if (processableTriplePattern) {
List<SQLJoinTable> alphaPredicateObjectAux =
calculateAlphaPredicateObjectSTG(tp, cm, tpPredicateURI, logicalTableAlias);
if (alphaPredicateObjectAux != null) {
alphaPredicateObjects.addAll(alphaPredicateObjectAux);
}
List<SQLLogicalTable> alphaPredicateObjectAux2 =
calculateAlphaPredicateObjectSTG2(tp, cm, tpPredicateURI, logicalTableAlias);
if (alphaPredicateObjectAux2 != null) {
alphaPredicateObjects2.addAll(alphaPredicateObjectAux2);
}
AlphaResult alphaResult =
new AlphaResult(alphaSubject, alphaPredicateObjects, tpPredicateURI);
// alphaResult.setAlphaPredicateObjects2(alphaPredicateObjectAux2);
AlphaResultUnion alphaTP = new AlphaResultUnion(alphaResult);
alphaResultUnionList.add(alphaTP);
}
} else if (tpPredicate.isVariable()) {
Collection<AbstractPropertyMapping> pms = cm.getPropertyMappings();
AlphaResultUnion alphaTP = new AlphaResultUnion();
for (AbstractPropertyMapping pm : pms) {
String tpPredicateURI = pm.getMappedPredicateName();
List<SQLJoinTable> alphaPredicateObjectAux =
calculateAlphaPredicateObjectSTG(tp, cm, tpPredicateURI, logicalTableAlias);
if (alphaPredicateObjectAux != null) {
alphaPredicateObjects.addAll(alphaPredicateObjectAux);
}
List<SQLLogicalTable> alphaPredicateObjectAux2 =
calculateAlphaPredicateObjectSTG2(tp, cm, tpPredicateURI, logicalTableAlias);
if (alphaPredicateObjectAux2 != null) {
alphaPredicateObjects2.addAll(alphaPredicateObjectAux2);
}
AlphaResult alphaResult =
new AlphaResult(alphaSubject, alphaPredicateObjects, tpPredicateURI);
// alphaResult.setAlphaPredicateObjects2(alphaPredicateObjectAux2);
alphaTP.add(alphaResult);
}
if (alphaTP != null) {
alphaResultUnionList.add(alphaTP);
}
} else {
String errorMessage = "Predicate has to be either an URI or a variable";
throw new QueryTranslationException(errorMessage);
}
}
return alphaResultUnionList;
}
public static boolean isIRI(Node node) {
if (node.isURI()) return true;
return false;
}
/**
* Builds up statements like [] rr:template "http://data.example.com/department/{DEPTNO}" or []
* rr:class ex:Department and returns them as a Statement List.
*
* @param r2rml the target com.hp.hpl.jena.rdf.model.Model
* @param mappingData the target that should be mapped to relational structures (subject,
* predicate or object)
* @param varDefs the construction definition of the target value based in the actual database
* value and some additional data like prefix strings or certain functions like uri( ... )
* @return a List<Statement> containing all the subject map statements
*/
private List<Statement> buildMapStatements(Model r2rml, Node mappingData, VarDefinition varDefs) {
List<Statement> results = new ArrayList<Statement>();
// a blank node []
Resource mapSubject = ResourceFactory.createResource();
// rr:template or rr:column or rr:constant
Property mapPredicate;
// a literal like "http://data.example.com/department/{DEPTNO}" or
// simply "DEPTNO" (column name) or a constant "Foo bar!!"
// (or in rare cases a URI, which is handled separately)
Literal mapObject;
// template or column or constant
if (mappingData.isVariable()) {
Collection<RestrictedExpr> restrictions = varDefs.getDefinitions((Var) mappingData);
List<PredicateAndObject> mapPredicateAndObjects = processRestrictions(restrictions);
for (PredicateAndObject result : mapPredicateAndObjects) {
mapPredicate = result.getPrediacte();
Statement resultStatement;
RDFNode rawObject = result.getRawObject();
// object is literal
if (rawObject.isLiteral()) {
mapObject = rawObject.asLiteral();
resultStatement = r2rml.createStatement(mapSubject, mapPredicate, mapObject);
// object is blank node
} else if (rawObject.isAnon()) {
Resource mapResObject = rawObject.asResource();
resultStatement = r2rml.createStatement(mapSubject, mapPredicate, mapResObject);
// object is resource
} else {
Resource mapResObject = rawObject.asResource();
resultStatement = r2rml.createStatement(mapSubject, mapPredicate, mapResObject);
}
results.add(resultStatement);
}
// everything that is not a variable is handled as a constant
} else if (mappingData.isConcrete()) {
// URIs and Literals have to be handled separately since the methods
// to retrieve the respective value are different
Statement resultStatement;
// URI
if (mappingData.isURI()) {
/*
* This case is somewhat special since the mapObject is not a
* Literal. So, this needs some special handling:
* - the Literal mapObject will not be used
* - a special mapObject_uri Resource will be created
* - the result will be created, appended to the List and
* returned to not go through any further ordinary processing
*/
Resource mapObject_uri = ResourceFactory.createResource(mappingData.getURI());
mapPredicate = ResourceFactory.createProperty(rrNamespace, "constant");
resultStatement = r2rml.createStatement(mapSubject, mapPredicate, mapObject_uri);
results.add(resultStatement);
return results;
// Literal
} else if (mappingData.isLiteral()) {
mapObject = ResourceFactory.createPlainLiteral(mappingData.getLiteral().toString(false));
// else (e.g. blank node)
} else { // mapSubject.isBlank() == true
/*
* Hmm... I think this violates the standard. So lean back and
* enjoy the trace...
*/
mapObject = null;
}
mapPredicate = ResourceFactory.createProperty(rrPrefix, "constant");
resultStatement = r2rml.createStatement(mapSubject, mapPredicate, mapObject);
results.add(resultStatement);
}
return results;
}