/**
* Generate the preamble for the properties file. This includes the copyright and machine
* generation warnings.
*
* @param writer The {@linkplain PrintWriter output stream}.
*/
protected void generatePreamble(final PrintWriter writer) {
writer.println(
MessageFormat.format(
preambleBundle.getString(propertiesCopyright.name()),
localName(baseName) + "_" + locale.getLanguage(),
new Date()));
writer.println(
MessageFormat.format(
preambleBundle.getString(generatedPropertiesNotice.name()),
getClass().getName(),
new Date()));
}
/**
* (Re)generate the target {@linkplain Properties properties} file.
*
* @throws IOException If an exceptional situation arises while reading properties.
*/
public void generate() throws IOException {
// Force correct initialization order... sigh.
AvailRuntime.nextHash();
final File fileName =
new File(
String.format(
"src/%s_%s.properties", baseName.replace('.', '/'), locale.getLanguage()));
System.out.println(fileName.getAbsolutePath());
final String[] components = baseName.split("\\.");
final File tempFileName =
new File(
String.format(
"%s/%s_%s.propertiesTEMP",
System.getProperty("java.io.tmpdir"),
components[components.length - 1],
locale.getLanguage()));
assert fileName.getPath().endsWith(".properties");
final Properties properties = new Properties();
try (final FileInputStream inputStream = new FileInputStream(fileName)) {
try (final InputStreamReader reader =
new InputStreamReader(inputStream, StandardCharsets.UTF_8)) {
properties.load(reader);
}
} catch (final FileNotFoundException e) {
// Ignore. It's okay if the file doesn't already exist.
}
final PrintWriter writer = new PrintWriter(tempFileName, "UTF-8");
generatePreamble(writer);
generateProperties(properties, writer);
writer.close();
// Now switch the new file in. In the rare event of failure between
// these steps, the complete content will still be available in the
// corresponding *.propertiesTEMP file.
boolean worked = fileName.delete();
if (!worked) {
System.err.println(
String.format("deleting the original properties file failed: %s", fileName));
}
worked = tempFileName.renameTo(fileName);
if (!worked) {
throw new RuntimeException(
String.format(
"moving the temporary properties file failed: %s -> %s", tempFileName, fileName));
}
}