SimpleStringTermIteratorImpl(
MapCache mapCache, String filename, String docsFilename, String indexFilename)
throws IOException {
buffer = new byte[BUFFER_SIZE];
this.docsFilename = docsFilename;
final CachedFile cf = CachedFile.create(indexFilename);
if (cf.exists()) {
indexFile = cf.loadDirectory();
} else {
indexFile = null;
}
file = mapCache.copyOrOpen(filename);
memory = file.get().memory();
done = false;
bufferLen = 0;
bufferOffset = 0L;
bufferPtr = 0;
}