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gnosygnu_xowa/140_dbs/src_400_tdbs/gplx/dbs/TdbUpdate.java
2014-06-30 00:15:52 -04:00

47 lines
1.6 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.*;
import gplx.criterias.*;
import gplx.lists.*; /*GfoNde*/
class TdbUpdateWkr implements Db_qryWkr {
public Object Exec(Db_engine engineObj, Db_qry cmdObj) {
TdbEngine engine = TdbEngine.cast_(engineObj); Db_qry_update cmd = (Db_qry_update)cmdObj;
int rv = 0;
TdbTable tbl = engine.FetchTbl(cmd.BaseTable());
Criteria crt = cmd.Where().Crt();
for (int i = 0; i < tbl.Rows().Count(); i++) {
GfoNde row = (GfoNde)tbl.Rows().FetchAt_asGfoNde(i);
if (crt.Matches(row)) {
UpdateRow(cmd, row);
rv++;
}
}
if (rv > 0) tbl.IsDirty_set(true);
return rv;
}
void UpdateRow(Db_qry_update cmd, GfoNde row) {
for (int i = 0; i < cmd.Args().Count(); i++) {
KeyVal p = (KeyVal)cmd.Args().FetchAt(i);
Db_arg prm = (Db_arg)p.Val();
row.Write(p.Key(), prm.Val());
}
}
public static TdbUpdateWkr new_() {TdbUpdateWkr rv = new TdbUpdateWkr(); return rv;}
}