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.");
}
}
public void visit(NodeValue value) {
logger.debug("visit NodeValue " + value);
if (!convertable) {
expression.push(Expression.FALSE); // prevent stack empty exceptions when conversion
return; // fails in the middle of a multi-arg operator conversion
}
if (value.isDecimal()
|| value.isDouble()
|| value.isFloat()
|| value.isInteger()
|| value.isNumber()) {
expression.push(new ConstantEx(value.asString(), value.asNode()));
} else if (value.isDateTime()) {
// Convert xsd:dateTime: CCYY-MM-DDThh:mm:ss
// to SQL-92 TIMESTAMP: CCYY-MM-DD hh:mm:ss[.fraction]
// TODO support time zones (WITH TIME ZONE columns)
expression.push(new ConstantEx(value.asString().replace("T", " "), value.asNode()));
} else {
expression.push(new ConstantEx(value.asString(), value.asNode()));
}
}