private boolean advanceBuffer() throws IOException {
int nextActiveBuffer = (activeBuffer + 1) % counts.length;
if (counts[nextActiveBuffer] == 0) {
if (exhausted) {
rethrowException();
return false;
}
myBufferFiller.fillReserve();
synchronized (lockObject) {
while (counts[nextActiveBuffer] == 0 && !exhausted) {
try {
lockObject.wait();
} catch (InterruptedException e) {
IOException ioe = new InterruptedIOException();
ioe.initCause(e);
throw ioe;
}
}
}
if (counts[nextActiveBuffer] == 0 && exhausted) {
rethrowException();
return false;
}
}
counts[activeBuffer] = 0;
activeBuffer = nextActiveBuffer;
pos = 0;
myBufferFiller.fillReserve();
return true;
}
@Override
public synchronized long skip(long n) throws IOException {
checkClosed();
if (n <= 0) {
return 0;
}
long skipped = 0;
int thisBuffer = activeBuffer;
do {
int remaining = counts[thisBuffer] - pos;
if (remaining >= n) {
pos += n;
skipped += n;
break;
}
pos = 0;
n -= remaining;
skipped += remaining;
thisBuffer = (thisBuffer + 1) % counts.length;
} while (thisBuffer != activeBuffer);
activeBuffer = thisBuffer;
myBufferFiller.fillReserve();
return skipped;
}
@Override
public void close() throws IOException {
if (buffers == null) {
return;
}
myBufferFiller.close();
buffers = null;
counts = null;
}