public static FileSaver create(File directory, String name, long size) throws Throwable {
String name2 = name;
for (int ii = 1; ; ++ii, name2 = name + '-' + ii) {
File resultFile = new File(directory, name2);
if (resultFile.exists()) {
continue;
}
File partialFile = new File(directory, String.format(PARTIAL_FORMAT, name2, size));
if (partialFile.exists()) {
continue;
}
boolean success = false;
FileSaver fileSaver = new FileSaver(partialFile, resultFile, size);
try {
if (0 >= size) {
fileSaver.file = new RandomAccessFile(resultFile, "rw");
fileSaver.file.setLength(0);
fileSaver.file.close();
fileSaver.file = null;
}
success = true;
return fileSaver;
} finally {
if (!success) {
fileSaver.close();
}
}
}
}
public static FileSaver continuePartialFile(File partialFile) throws Throwable {
if ((!partialFile.isFile()) || (PARTIAL_EXTRA_DATA > partialFile.length())) {
return null;
}
Matcher matcher = PARTIAL_PATTERN.matcher(partialFile.getName());
if (!matcher.matches()) {
return null;
}
File resultFile = new File(partialFile.getParentFile(), matcher.group(1));
if (resultFile.exists()) {
return null;
}
long size;
try {
size = Long.parseLong(matcher.group(2), 16);
} catch (NumberFormatException ex) {
return null;
}
if (0 >= size) {
return null;
}
boolean success = false;
FileSaver fileSaver = new FileSaver(partialFile, resultFile, size);
try {
fileSaver.file = new RandomAccessFile(partialFile, "rw");
fileSaver.saved = fileSaver.file.length() - PARTIAL_EXTRA_DATA;
fileSaver.file.seek(fileSaver.saved);
fileSaver.lastClock = fileSaver.file.readBoolean();
fileSaver.lastCrc = fileSaver.file.read() << 24;
fileSaver.lastCrc |= fileSaver.file.read() << 16;
fileSaver.lastCrc |= fileSaver.file.read() << 8;
fileSaver.lastCrc |= fileSaver.file.read();
fileSaver.file.close();
fileSaver.file = null;
success = true;
return fileSaver;
} finally {
if (!success) {
fileSaver.close();
}
}
}