/**
* Retrieves the absolute path of the file picked in the file chooser.
*
* @return The absolute path of the file to open.
*/
private String getFileUrlFromUser() {
JFileChooser fc = new JFileChooser();
FPFileFilter fpFilter = new FPFileFilter();
fpFilter.addExtension("XML");
fpFilter.addExtension("DATA");
fpFilter.setDescription("XML & Flat data files");
fc.addChoosableFileFilter(fpFilter);
int result = fc.showOpenDialog(projectPanel);
return (result == JFileChooser.APPROVE_OPTION ? fc.getSelectedFile().toURI().toString() : null);
}
/**
* Loads a file from the system and returns an instanciated {@link Project} object if the
* operation was successfully executed. This method handles both flat data file types (<code>
* *.data</code>) and XML files (<code>*.xml</code>).
*
* @param aFile The file to load
* @return A project found in the loaded file
* @throws IOException If the file could not loaded properly.
* @throws ParseException If the content of the file could not be properly parsed.
*/
public Project load(File aFile) throws IllegalArgumentException, IOException, ParseException {
String extension = FPFileFilter.getExtension(aFile);
if (extension != null && extension.toLowerCase().equals(XML_FILE_EXTENSION)) {
return loadXOMFile(aFile);
} else if (extension != null && extension.toLowerCase().equals(DATA_FILE_EXTENSION)) {
return loadFlatFile(aFile);
} else {
throw new IllegalArgumentException(
"Invalid filetype! The extension (" + extension + ") is not supported.");
}
}
/**
* A {@link Project} is stored to a proper file format based on it's storage representation. If
* the extension indicates it is to be stored as (<code>*.xml</code>), the representation will be
* in XML. Otherwise, the {@link Project} is stored in a flat file format (<code>*.data</code>).
*
* @param aProject The project to save.
* @param aFile The file to save the project to.
* @throws IOException If file I/O in some way fails
*/
public void save(Project aProject, File aFile) throws IOException {
String extension = FPFileFilter.getExtension(aFile);
if (extension != null && extension.equals("data")) {
saveFlatFile(aProject, aFile);
} else if (extension != null && extension.equals("xml")) {
saveXmlFile(aProject, aFile);
} else {
throw new IllegalArgumentException(
"The file type (" + extension + ") is not supported as a storage format!");
}
}