/**
* Checks if a given file exists and, if not, create it by copying a default template from
* resources; used to create default conf files.
*
* @param file The path of the file that needs to exist
* @param template The path of the template for the file
*/
public static void ensureFileExists(final String file, final String template) {
if (LAUNCHED_FROM_JAR && !Files.exists(Paths.get(file))) {
if (Debug.on) printDebug("[Meta] " + file + " does not exist: creating a default one.");
InputStream stream = Meta.class.getResourceAsStream(template);
if (stream == null) {
printDebug(
"[ WARNING ] template for "
+ template
+ " not found. Won't create a default "
+ file
+ ".");
} else {
int readBytes;
byte[] buffer = new byte[4096];
try (OutputStream outStream = new FileOutputStream(new File(file))) {
while ((readBytes = stream.read(buffer)) > 0) {
outStream.write(buffer, 0, readBytes);
}
if (Debug.on)
printDebug("[Meta] created default file " + file + " from " + template + ".");
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
stream.close();
} catch (IOException ignore) {
}
}
}
} else {
if (Meta.LAUNCHED_FROM_JAR && Debug.on) printDebug("[Meta] file exists: " + file + ".");
}
}
// To be called exactly twice by the parent process
static <T> T rendezvousParent(Process p, Callable<T> callable) throws Throwable {
p.getInputStream().read();
T result = callable.call();
OutputStream os = p.getOutputStream();
os.write((byte) '\n');
os.flush();
return result;
}
private void doManifest(
Jar jar, String[] digestNames, MessageDigest[] algorithms, OutputStream out)
throws Exception {
for (Map.Entry<String, Resource> entry : jar.getResources().entrySet()) {
String name = entry.getKey();
if (!METAINFDIR.matcher(name).matches()) {
out.write("\r\n".getBytes("UTF-8"));
out.write("Name: ".getBytes("UTF-8"));
out.write(name.getBytes("UTF-8"));
out.write("\r\n".getBytes("UTF-8"));
digest(algorithms, entry.getValue());
for (int a = 0; a < algorithms.length; a++) {
if (algorithms[a] != null) {
byte[] digest = algorithms[a].digest();
String header = digestNames[a] + "-Digest: " + new Base64(digest) + "\r\n";
out.write(header.getBytes("UTF-8"));
}
}
}
}
}