public Literal evaluate(ValueFactory valueFactory, Value... args)
throws ValueExprEvaluationException {
if (args.length != 2) {
throw new ValueExprEvaluationException("STRENDS requires 2 arguments, got " + args.length);
}
Value leftVal = args[0];
Value rightVal = args[1];
if (leftVal instanceof Literal && rightVal instanceof Literal) {
Literal leftLit = (Literal) leftVal;
Literal rightLit = (Literal) rightVal;
if (QueryEvaluationUtil.compatibleArguments(leftLit, rightLit)) {
String leftLexVal = leftLit.getLabel();
String rightLexVal = rightLit.getLabel();
return BooleanLiteralImpl.valueOf(leftLexVal.endsWith(rightLexVal));
} else {
throw new ValueExprEvaluationException("incompatible operands for STRENDS function");
}
} else {
throw new ValueExprEvaluationException("STRENDS function expects literal operands");
}
}
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]);
}