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]);
}
private RDFValueRange fillObjectRange(Value oVal) {
if (oVal instanceof URI) {
URI uri = (URI) oVal;
PrefixRange pr = new PrefixRange();
pr.getPrefixList().add(uri.stringValue());
return new RDFValueRange(
new RDFURIRange(pr.getPrefixList()),
new RDFLiteralRange(Collections.<URI, RangeLength<?>>emptyMap()));
} else if (oVal instanceof Literal) {
Literal l = (Literal) oVal;
Range literalRange = null;
if (l.getDatatype().equals(XMLSchema.INT))
literalRange =
new RDFLiteralRange(XMLSchema.INT, new IntervalRange(l.intValue(), l.intValue()));
else if (l.getDatatype().equals(XMLSchema.LONG))
literalRange =
new RDFLiteralRange(
XMLSchema.LONG, new IntervalRange((int) l.longValue(), (int) l.longValue()));
else if (l.getDatatype().equals(XMLSchema.STRING)) {
PrefixRange pr = new PrefixRange();
pr.getPrefixList().add(l.stringValue());
literalRange = new RDFLiteralRange(XMLSchema.STRING, pr);
} else if (l.getDatatype().equals(XMLSchema.DATETIME)) {
Calendar cal = l.calendarValue().toGregorianCalendar();
CalendarRange cr = new CalendarRange(cal.getTime(), cal.getTime());
literalRange = new RDFLiteralRange(XMLSchema.DATETIME, cr);
}
if (literalRange != null)
return new RDFValueRange(
new RDFURIRange(Collections.<String>emptyList()), (RDFLiteralRange) literalRange);
}
return new RDFValueRange();
}
private Object encodeLiteral(final Literal literal) {
final URI datatype = literal.getDatatype();
if (datatype == null || datatype.equals(XMLSchema.STRING)) {
final String language = literal.getLanguage();
if (language == null) {
return literal.getLabel();
} else {
return SerializerAvro.newGenericRecord(Schemas.STRING_LANG, literal.getLabel(), language);
}
} else if (datatype.equals(XMLSchema.BOOLEAN)) {
return literal.booleanValue();
} else if (datatype.equals(XMLSchema.LONG)) {
return literal.longValue();
} else if (datatype.equals(XMLSchema.INT)) {
return literal.intValue();
} else if (datatype.equals(XMLSchema.DOUBLE)) {
return literal.doubleValue();
} else if (datatype.equals(XMLSchema.FLOAT)) {
return literal.floatValue();
} else if (datatype.equals(XMLSchema.SHORT)) {
return SerializerAvro.newGenericRecord(Schemas.SHORT, literal.intValue());
} else if (datatype.equals(XMLSchema.BYTE)) {
return SerializerAvro.newGenericRecord(Schemas.BYTE, literal.intValue());
} else if (datatype.equals(XMLSchema.INTEGER)) {
return SerializerAvro.newGenericRecord(Schemas.BIGINTEGER, literal.stringValue());
} else if (datatype.equals(XMLSchema.DECIMAL)) {
return SerializerAvro.newGenericRecord(Schemas.BIGDECIMAL, literal.stringValue());
} else if (datatype.equals(XMLSchema.DATETIME)) {
final XMLGregorianCalendar calendar = literal.calendarValue();
return SerializerAvro.newGenericRecord(
Schemas.CALENDAR,
calendar.getTimezone(),
calendar.toGregorianCalendar().getTimeInMillis());
}
throw new IllegalArgumentException("Unsupported literal: " + literal);
}