public static NodeValue strLang(NodeValue v1, NodeValue v2) {
if (!v1.isString()) throw new ExprEvalException("Not a string (arg 1): " + v1);
if (!v2.isString()) throw new ExprEvalException("Not a string (arg 2): " + v2);
String lex = v1.asString();
String lang = v2.asString();
// Check?
Node n = Node.createLiteral(lex, lang, null);
return NodeValue.makeNode(n);
}
@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;
}
public static NodeValue strDatatype(NodeValue v1, NodeValue v2) {
if (!v1.isString()) throw new ExprEvalException("Not a string (arg 1): " + v1);
if (!v2.isIRI()) throw new ExprEvalException("Not an IRI (arg 2): " + v2);
String lex = v1.asString();
Node dt = v2.asNode();
// Check?
Node n = Node.createLiteral(lex, null, Node.getType(dt.getURI()));
return NodeValue.makeNode(n);
}
@Override
public NodeValue exec(NodeValue v) {
if (!v.isString()) {
ALog.warn(this, "date: argument not a string: " + v);
throw new ExprEvalException("date: argument not a string: " + v);
}
String lexicalForm = v.getString();
// Quite picky about format
if (!lexicalForm.matches("\\d{4}-\\d{2}-\\d{2}")) {
ALog.warn(this, "date: argument not in date format: " + v);
throw new ExprEvalException("date: argument not in date format: " + v);
}
lexicalForm = lexicalForm + "T00:00:00Z";
NodeValue nv = NodeValue.makeNode(lexicalForm, XSDDatatype.XSDdateTime);
return nv;
}
private SWRLDataObject makeDataObject(final Expr expr) throws URISyntaxException {
if (expr.isVariable()) {
return swrlFactory.createDataVariable(new URI(varNS + expr.getVarName()));
} else if (expr.isConstant()) {
final NodeValue nv = (NodeValue) expr;
OWLDataValue value;
if (nv.isInteger()) value = owlModel.createDataValue(nv.getInteger());
else if (nv.isDouble()) value = owlModel.createDataValue(Double.valueOf(nv.getDouble()));
else if (nv.isFloat()) value = owlModel.createDataValue(Float.valueOf(nv.getFloat()));
else if (nv.isBoolean()) value = owlModel.createDataValue(Boolean.valueOf(nv.getBoolean()));
else if (nv.isString()) value = owlModel.createDataValue(nv.getString());
else if (nv.isDecimal()) value = owlModel.createDataValue(nv.getDecimal());
else if (nv.hasDateTime()) value = owlModel.createDataValue(nv.getDateTime());
else /* if (nv.isLiteral()) */ throw new NotImplementedException();
return swrlFactory.wrapDataValue(value);
} else {
throw new IllegalArgumentException(
"Nested constraint (filter) near " + expr + " can not be transformed to SWRL atom.");
}
}