/*
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);
	}
}