@Override
public boolean dropIndex(final IndexType type) {
// close and drop index (return true if no index exists)
final Index index = index(type);
close(type);
return index == null || index.drop();
}
/**
* Closes the specified index.
*
* @param type index to be closed
*/
private synchronized void close(final IndexType type) {
// close index and invalidate reference
final Index index = index(type);
if (index != null) {
index.close();
set(type, null);
}
}