private static void invertIndex(File indexFile, File invertFile) {
IndexAggregator aggr = new SortedInvertedIndexAggregator();
System.out.print(" Inverted index construction... (" + invertFile.getName() + ")");
aggr.run(indexFile, invertFile);
}
private static void aggregateIndex(File indexFile, File aggregateFile) {
IndexAggregator aggr = new SortedCountAggregator();
System.out.print(" Aggregating frequencies... (" + aggregateFile.getName() + ")");
aggr.run(indexFile, aggregateFile);
}