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gnosygnu_xowa/140_dbs/src/gplx/dbs/Db_conn_bldr.java

48 lines
2.0 KiB

/*
XOWA: the XOWA Offline Wiki Application
Copyright (C) 2012 gnosygnu@gmail.com
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package gplx.dbs; import gplx.*;
public class Db_conn_bldr {
private Db_conn_bldr_wkr wkr;
public void Reg_default_sqlite() {wkr = Db_conn_bldr_wkr__sqlite.Instance; wkr.Clear_for_tests();}
public void Reg_default_mem() {wkr = Db_conn_bldr_wkr__mem.Instance; wkr.Clear_for_tests();}
public boolean Exists(Io_url url) {return wkr.Exists(url);}
// public Db_conn Parse(String s) {
// Db_conn_info conn_info = Db_conn_info_.parse(s);
// Db_conn conn = Db_conn_pool.Instance.Get_or_new(conn_info);
// return conn;
// }
public Db_conn Get(Io_url url) {return wkr.Get(url);}
public Db_conn New(Io_url url) {return wkr.New(url);}
public Db_conn_bldr_data Get_or_new(Io_url url) {
boolean exists = wkr.Exists(url);
Db_conn conn = exists ? Get(url) : New(url);
return new Db_conn_bldr_data(conn, exists);
}
public Db_conn Get_or_noop(Io_url url) {
Db_conn rv = wkr.Get(url);
return rv == null ? Db_conn_.Noop : rv;
}
public Db_conn Get_or_autocreate(boolean autocreate, Io_url url) {
boolean exists = wkr.Exists(url);
if (exists) return Get(url);
if (autocreate) return New(url);
else throw Err_.new_("dbs", "db does not exist", "url", url.Raw());
}
public static final Db_conn_bldr Instance = new Db_conn_bldr(); Db_conn_bldr() {}
}