// we don't actually write a .fdx-like index, instead we read the
// stored fields file in entirety up-front and save the offsets
// so we can seek to the documents later.
private void readIndex(int size) throws IOException {
ChecksumIndexInput input = new BufferedChecksumIndexInput(in);
offsets = new long[size];
int upto = 0;
while (!scratch.get().equals(END)) {
SimpleTextUtil.readLine(input, scratch);
if (StringHelper.startsWith(scratch.get(), DOC)) {
offsets[upto] = input.getFilePointer();
upto++;
}
}
SimpleTextUtil.checkFooter(input);
assert upto == offsets.length;
}
private void readLine() throws IOException {
SimpleTextUtil.readLine(in, scratch);
}