/**
* Searches the selected directories in the filesystem for Mp3 files.
*
* @param e ActionEvent
*/
public synchronized void actionPerformed(ActionEvent e) {
try {
Mp3Controller controller = getMp3Controller();
// launch filechooser and import selected directory
FileSystemModel fsModel = controller.getFileSystemModel();
fsModel.clear();
File file = FileChooser.chooseDirectory(super.getSearchPanel(), "Import");
if (file != null) {
getStatusPanel().startProcessing("Loading... " + file);
fsModel.includeDirectory(file.toURI().toURL());
Mp3Model mp3Model = controller.getMp3Model();
mp3Model.setMp3ModelListener(getMp3ModelListener());
mp3Model.loadMp3s(fsModel);
}
// underlying model/data has changed
getSearchPanel().constraintsHaveChanged();
getStatusPanel().stopProcessing("Successfully loaded: " + file);
} catch (Exception exception) {
getStatusPanel().stopProcessingError("Error(s) occurred while loading Mp3s");
ExceptionHandler.handleException(exception);
}
}
/**
* Returns all Id3 property-values for the Mp3 as an Iterator of Triples.
*
* @return ClosableIterator
* @throws QueryException
*/
public ClosableIterator getStatements() throws QueryException {
ClosableIterator schemaProperties = null;
try {
schemaProperties = getSchemaProperties();
String query = getStatementsQuery(mp3.getResource(), schemaProperties);
return model.query(query);
} catch (Exception exception) {
throw new QueryException("Failed to getStatements.", exception);
} finally {
if (schemaProperties != null) {
schemaProperties.close();
}
}
}
/**
* 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();
}