/**
* Returns a queryString in the following format:
*
* <p>
*
* <pre>
* select $s $p $o
* from <model.getResource()>
* where $s $p $o
* and $s <id3:uri> <mp3>
* and ($p <mulgara:is> <schemaProperty-1>
* or $p <mulgara:is> <schemaProperty-2>
* ...
* or $p <mulgara:is> <schemaProperty-n>) ;
* </pre>
*
* where <schemaProperty> is a property of the ID3Tags schema.
*
* @return String
* @param mp3 URIReference
* @param properties Iterator of Triples where the SubjectNode's represent the schemaProperties.
*/
private String getStatementsQuery(URIReference mp3, Iterator properties) {
// if there are no properties, there should be no statements.
if ((properties == null) || !(properties.hasNext())) {
return ";";
}
Node currentProperty = ((Triple) properties.next()).getPredicate();
StringBuffer query = new StringBuffer("select $s $p $o" + NEWLINE);
query.append("from <" + model.getResource().getURI() + ">" + NEWLINE);
query.append("where $s $p $o" + NEWLINE);
query.append("and $s" + ID3_URI + asString(mp3) + " " + NEWLINE);
query.append(
"and ( $p" + MULGARA_IS + asString((URIReference) currentProperty) + " " + NEWLINE);
while (properties.hasNext()) {
currentProperty = ((Triple) properties.next()).getSubject();
query.append(
" or $p" + MULGARA_IS + asString((URIReference) currentProperty) + " " + NEWLINE);
}
// results must be ordered
query.append(") order by $s $p $o ; ");
return query.toString();
}
