}
public void init(SortedKeyValueIterator<Key,Value> source, Map<String,String> options, IteratorEnvironment env) throws IOException {
validateOptions(options);
event = new EventFields();
this.comparator = getKeyComparator();
this.iterator = source;
try {
// Replace any expressions that we should not evaluate.
if (null != this.skipExpressions && this.skipExpressions.size() != 0) {