Directory dir = new RAMDirectory();
IndexWriter writer = null;
IndexReader reader = null;
int i;
try {
writer = new IndexWriter(dir, new WhitespaceAnalyzer(), true);
// add 100 documents
for (i = 0; i < 100; i++) {
addDoc(writer);
}
assertEquals(100, writer.docCount());
writer.close();
// delete 40 documents
reader = IndexReader.open(dir);
for (i = 0; i < 40; i++) {
reader.delete(i);
}
reader.close();
// test doc count before segments are merged/index is optimized
writer = new IndexWriter(dir, new WhitespaceAnalyzer(), false);
assertEquals(100, writer.docCount());
writer.close();
reader = IndexReader.open(dir);
assertEquals(100, reader.maxDoc());
assertEquals(60, reader.numDocs());
reader.close();
// optimize the index and check that the new doc count is correct
writer = new IndexWriter(dir, new WhitespaceAnalyzer(), false);
writer.optimize();
assertEquals(60, writer.docCount());
writer.close();
// check that the index reader gives the same numbers.
reader = IndexReader.open(dir);
assertEquals(60, reader.maxDoc());
assertEquals(60, reader.numDocs());
reader.close();
}
catch (IOException e) {
e.printStackTrace();
}
