@Override
public int read(byte[] b, int off, int len) throws IOException {
if (len <= 0) {
return 0;
}
while (true) {
if (buffer == null) {
try {
buffer = nextBuffer();
} catch (IllegalStateException e) {
String msg =
DataUtils.formatMessage(
DataUtils.ERROR_BLOCK_NOT_FOUND,
"Block not found in id {0}",
Arrays.toString(idBuffer.array()));
throw new IOException(msg, e);
}
if (buffer == null) {
return -1;
}
}
int result = buffer.read(b, off, len);
if (result > 0) {
pos += result;
return result;
}
buffer = null;
}
}
