/**
* Create a string pool object to represent the beginning of a search range.
*
* @param factory The string pool factory that will create the object
* @param prefixNode The data for the object.
* @param predType Predicate to indicate the type of data to get from the string pool.
* @return An object representing the start of a range of data to get from the string pool.
* @throws QueryException If the predicate indicates a URI but the prefix data is not a valid URI.
*/
private SPObject getStartObject(SPObjectFactory factory, Node prefixNode, long predType)
throws QueryException {
if (prefixNode instanceof Literal) {
String prefix = ((Literal) prefixNode).getLexicalForm();
if (predType == mulgaraPrefix) {
try {
return factory.newSPURI(new URI(prefix));
} catch (URISyntaxException e) {
throw new QueryException(
"Bad URI prefix provided: "
+ prefix
+ " (should this be using mulgara:stringPrefix?)");
}
} else return factory.newSPString(prefix);
} else {
URI startPrefixUri = ((URIReference) prefixNode).getURI();
if (predType == mulgaraPrefix) return factory.newSPURI(startPrefixUri);
else return factory.newSPString(startPrefixUri.toString());
}
}
/**
* Evaluates a URI and adds it to the namespace map as a namespace.
*
* @param uri URI
*/
protected void addNamespaceURI(URI uri) {
if (uri == null) {
throw new IllegalArgumentException("URI argument is null.");
}
// extract URI without fragment
String uriString = uri.toString();
String newURI = null;
if (uriString != null) {
// determine what comes last a '#' or '/'
int hashindex = uriString.lastIndexOf('#');
int slashindex = uriString.lastIndexOf('/');
// validate (URI must contain a forward slash)
if (slashindex == -1) {
// namespace may have been evaluated already
return;
}
// is there a '/' after the '#'?
if (slashindex > hashindex) {
// remove everything after the last '/'
int index = uriString.lastIndexOf('/');
newURI = uriString.substring(0, index) + "/";
} else {
// '#' comes after last '/' (remove entire fragment)
newURI = uriString.replaceAll(uri.getFragment(), "");
}
// only add namespace if it is new
if ((newURI != null) && (!namespaces.containsValue(newURI))) {
// add to namespaces
namespaces.put("ns" + namespaces.size(), newURI);
}
}
}