}
private Directory getIndexStore(String field, String[] contents)
throws IOException {
Directory indexStore = newDirectory();
RandomIndexWriter writer = new RandomIndexWriter(random, indexStore);
for (int i = 0; i < contents.length; ++i) {
Document doc = new Document();
doc.add(newField(field, contents[i], Field.Store.YES, Field.Index.ANALYZED));
writer.addDocument(doc);
}
writer.close();
return indexStore;
}