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gnosygnu_xowa/140_dbs/src/gplx/dbs/engines/nulls/Noop_engine.java

48 lines
2.7 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.engines.nulls; import gplx.*; import gplx.dbs.*; import gplx.dbs.engines.*;
import gplx.core.stores.*; import gplx.dbs.metas.*; import gplx.dbs.sqls.*;
public class Noop_engine implements Db_engine {
public String Tid() {return Noop_conn_info.Tid_const;}
public Db_conn_info Conn_info() {return Db_conn_info_.Null;}
public Sql_qry_wtr Sql_wtr() {return sql_wtr;} private final Sql_qry_wtr sql_wtr = Sql_qry_wtr_.Basic;
public void Conn_open() {}
public void Conn_term() {}
public Db_engine New_clone(Db_conn_info url) {return this;}
public Db_rdr New_rdr__rls_manual (Object rdr_obj, String sql) {return Db_rdr_.Empty;}
public Db_rdr New_rdr__rls_auto (Db_stmt stmt, Object rdr_obj, String sql) {return Db_rdr_.Empty;}
public Db_stmt New_stmt_prep(Db_qry qry) {return Db_stmt_.Null;}
public Object New_stmt_prep_as_obj(String sql) {throw Err_.new_unimplemented();}
public DataRdr New_rdr(java.sql.ResultSet rdr, String sql) {return DataRdr_.Null;}
public void Txn_bgn(String name) {}
public String Txn_end() {return "";}
public void Txn_cxl() {}
public void Txn_sav() {}
public Object Exec_as_obj(Db_qry cmd) {return cmd.Exec_is_rdr() ? (Object)DataRdr_.Null : -1;}
public void Ddl_create_tbl(Dbmeta_tbl_itm meta) {}
public void Ddl_create_idx(Gfo_usr_dlg usr_dlg, Dbmeta_idx_itm... ary) {}
public void Ddl_append_fld(String tbl, Dbmeta_fld_itm fld) {}
public void Ddl_delete_tbl(String tbl) {}
public void Env_db_attach(String alias, Io_url db_url) {}
public void Env_db_detach(String alias) {}
public boolean Meta_tbl_exists(String tbl) {return false;}
public boolean Meta_fld_exists(String tbl, String fld) {return false;}
public Dbmeta_tbl_mgr Meta_tbl_load_all() {return meta_tbl_mgr;} private final Dbmeta_tbl_mgr meta_tbl_mgr = new Dbmeta_tbl_mgr();
public static final Noop_engine Instance = new Noop_engine(); Noop_engine() {}
}