code: public CloseableIterator<CaptureSearchResult> getPrefixIterator(String prefix)
  			throws ResourceIndexNotAvailableException {
  		
  		try {
  			return adaptIterator(recordIterator(prefix,true));
  		} catch (DatabaseException e) {
  			throw new ResourceIndexNotAvailableException(e.getMessage()); 
  		}
  	}
docs: /*
  (non-Javadoc)
  
  @see org.archive.wayback.resourceindex.SearchResultSource#getPrefixIterator(java.lang.String)