/**
* Optimization hook. Override this to make SequenceFile.Sorter's scream.
*
* <p>The default implementation reads the data into two {@link WritableComparable}s (using {@link
* Writable#readFields(DataInput)}, then calls {@link
* #compare(WritableComparable,WritableComparable)}.
*/
public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
try {
buffer.reset(b1, s1, l1); // parse key1
key1.readFields(buffer);
buffer.reset(b2, s2, l2); // parse key2
key2.readFields(buffer);
} catch (IOException e) {
throw new RuntimeException(e);
}
return compare(key1, key2); // compare them
}
/**
* Compare two WritableComparables.
*
* <p>The default implementation uses the natural ordering, calling {@link
* Comparable#compareTo(Object)}.
*/
@SuppressWarnings("unchecked")
public int compare(WritableComparable a, WritableComparable b) {
return a.compareTo(b);
}