public static Byte node2Byte(Node node) {
if (node == null) return null;
if (node instanceof PlainLiteral) {
return toByte(node.asLiteral());
}
if (node instanceof LanguageTagLiteral) {
throw new RDFDataException(
"Cannot convert a language tagged literal to an Byte - it makes no sense");
}
if (node instanceof DatatypeLiteral) {
URI datatype = node.asDatatypeLiteral().getDatatype();
if (datatype.equals(XSD._byte)) {
return toByte(node.asDatatypeLiteral());
} else {
throw new RDFDataException("Cannot convert from datatype " + datatype + " to URI");
}
}
throw new RDFDataException("Cannot convert from " + node.getClass() + " to Byte");
}
