问题
Sorry for the naive question, but I got stuck while following all the pieces of tutorials available. So, is there a way to populate a Database db from a simple List rather than loading it reading a file?
Basically what I'm looking for is something similar to:
List objects = ...
Database db = ClassGenericsUtil.parameterizeOrAbort(ArrayDatabase.class, params, objects);
db.initialize();
Thanks in advance.
回答1:
What are the contents of your Strings?
Same as understood by the ELKI parsers?
This will likely require some code modifications, because the parsers are designed around Javas InputStream. I don't suggest wrapping a List<String> into an InputStream although that would probably be the least-effort approach.
Why don't you try extending AbstractDatabaseConnection (or implementing DatabaseConnection)? The database connection format, MultipleObjectsBundle is not much more than List<Object> and relation metadata; fairly easy to construct.
Alternatively, you could use your own code to parse the Strings into double[] and then use ArrayAdapterDatabaseConnection; which will wrap the double[] as DoubleVector for you and construct the bundles.
来源：https://stackoverflow.com/questions/19841999/elki-use-liststring-of-objects-to-populate-the-database