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gnosygnu_xowa/140_dbs/src/gplx/dbs/Db_stmt_bldr.java
2015-07-12 21:10:02 -04:00

49 lines
2.2 KiB
Java

/*
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_stmt_bldr {
private Db_conn conn; private Db_stmt create, update, delete;
private String tbl_name; private String[] flds_keys, flds_vals, flds_all;
public void Conn_(Db_conn v, String tbl_name, Db_meta_fld_list flds, String... flds_keys) {
Conn_(v, tbl_name, flds.To_str_ary(), flds.To_str_ary_exclude(flds_keys), flds_keys);
}
public void Conn_(Db_conn v, String tbl_name, String[] flds_vals, String... flds_keys) {
Conn_(v, tbl_name, String_.Ary_add(flds_keys, flds_vals), flds_vals, flds_keys);
}
private void Conn_(Db_conn v, String tbl_name, String[] flds_all, String[] flds_vals, String... flds_keys) {
this.conn = v; this.tbl_name = tbl_name;
this.flds_all = flds_all; this.flds_vals = flds_vals; this.flds_keys = flds_keys;
}
public Db_stmt Get(byte cmd_mode) {
switch (cmd_mode) {
case Db_cmd_mode.Tid_create: if (create == null) create = conn.Stmt_insert(tbl_name, flds_all); return create;
case Db_cmd_mode.Tid_update: if (update == null) update = conn.Stmt_update(tbl_name, flds_keys, flds_vals); return update;
case Db_cmd_mode.Tid_delete: if (delete == null) delete = conn.Stmt_delete(tbl_name, flds_keys); return delete;
case Db_cmd_mode.Tid_ignore: return Db_stmt_.Null;
default: throw Exc_.new_unhandled(cmd_mode);
}
}
public void Batch_bgn() {conn.Txn_bgn(tbl_name);}
public void Batch_end() {conn.Txn_end();}
public void Rls() {
create = Db_stmt_.Rls(create);
update = Db_stmt_.Rls(update);
delete = Db_stmt_.Rls(delete);
}
}