final int dbId = ois.readInt();
final int numIndex = ois.readInt();
ByteRangeComparator[] comps = new ByteRangeComparator[numIndex];
for (int idx = 0; idx < numIndex; idx++) {
final String className = (String) ois.readObject();
ByteRangeComparator comp = dbman.getComparatorInstances().get(className);
if (comp == null) {
Class<?> clazz = Class.forName(className);
comp = (ByteRangeComparator) clazz.newInstance();
dbman.getComparatorInstances().put(className, comp);
}