@Override
public OWLLiteral getOWLLiteral(String lexicalValue, OWLDatatype datatype) {
OWLLiteral literal;
if (datatype.isRDFPlainLiteral()) {
int sep = lexicalValue.lastIndexOf('@');
if (sep != -1) {
String lex = lexicalValue.substring(0, sep);
String lang = lexicalValue.substring(sep + 1);
literal = getBasicLiteral(lex, lang, getRDFPlainLiteral());
} else {
literal = getBasicLiteral(lexicalValue, datatype);
}
} else {
// check the four special cases
try {
if (datatype.isBoolean()) {
literal = getOWLLiteral(isBooleanTrueValue(lexicalValue.trim()));
} else if (datatype.isFloat()) {
if (lexicalValue.trim().equals("-0.0")) {
// according to some W3C test, this needs to be
// different from 0.0; Java floats disagree
if (negativeFloatZero == null) {
negativeFloatZero = getBasicLiteral("-0.0", XSD_FLOAT);
}
literal = negativeFloatZero;
} else {
try {
float f = Float.parseFloat(lexicalValue);
literal = getOWLLiteral(f);
} catch (NumberFormatException e) {
literal = getBasicLiteral(lexicalValue, datatype);
}
}
} else if (datatype.isDouble()) {
literal = getOWLLiteral(Double.parseDouble(lexicalValue));
} else if (datatype.isInteger()) {
// again, some W3C tests require padding zeroes to make
// literals different
if (lexicalValue.trim().charAt(0) == '0') {
literal = getBasicLiteral(lexicalValue, getIntegerOWLDatatype());
} else {
try {
// this is fine for values that can be parsed as
// ints - not all values are
literal = getOWLLiteral(Integer.parseInt(lexicalValue));
} catch (NumberFormatException ex) {
// try as a big decimal
literal = getBasicLiteral(lexicalValue, datatype);
}
}
} else {
literal = getBasicLiteral(lexicalValue, datatype);
}
} catch (NumberFormatException e) {
// some literal is malformed, i.e., wrong format
literal = getBasicLiteral(lexicalValue, datatype);
}
}
return literal;
}
