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93 lines
4.1 KiB
93 lines
4.1 KiB
/*
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XOWA: the XOWA Offline Wiki Application
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Copyright (C) 2012 gnosygnu@gmail.com
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package gplx.dbs.engines.sqlite; import gplx.*; import gplx.dbs.*; import gplx.dbs.engines.*;
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import gplx.core.primitives.*; import gplx.dbs.qrys.*; import gplx.dbs.utls.*; import gplx.dbs.engines.*; import gplx.dbs.engines.sqlite.*;
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public class Sqlite_engine_ {
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public static void Db_attach(Db_conn p, String alias, String url) {
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String s = String_.Format("ATTACH '{0}' AS {1};", url, alias);
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Db_qry qry = Db_qry_sql.xtn_(s);
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p.Exec_qry(qry);
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}
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public static void Db_detach(Db_conn p, String alias) {
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String s = String_.Format("DETACH '{0}';", alias);
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Db_qry qry = Db_qry_sql.xtn_(s);
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p.Exec_qry(qry);
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}
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public static void Tbl_create_and_delete(Db_conn p, String tbl_name, String tbl_sql) {
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Tbl_delete(p, tbl_name);
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Db_qry qry = Db_qry_sql.ddl_(tbl_sql);
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p.Exec_qry(qry);
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}
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public static void Tbl_create(Db_conn p, String tbl_name, String tbl_sql) {
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Db_qry qry = Db_qry_sql.ddl_(tbl_sql);
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p.Exec_qry(qry);
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}
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public static void Tbl_delete_many(Db_conn p, String... tbls) {
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int len = tbls.length;
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for (int i = 0; i < len; i++)
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Tbl_delete(p, tbls[i]);
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}
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public static void Tbl_delete(Db_conn p, String tbl) {
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Db_qry qry = Db_qry_sql.ddl_("DROP TABLE IF EXISTS " + tbl + ";");
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p.Exec_qry(qry);
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}
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public static void Tbl_rename(Db_conn p, String src, String trg) {
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Db_qry qry = Db_qry_sql.ddl_(String_.Format("ALTER TABLE {0} RENAME TO {1};", src, trg));
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p.Exec_qry(qry);
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}
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public static void Pragma_page_size(Db_conn p, int val) {
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Db_qry qry = Db_qry_sql.ddl_("PRAGMA page_size = " + Int_.To_str(val) + ";");
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p.Exec_qry(qry);
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}
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public static void Idx_create(Gfo_usr_dlg usr_dlg, Db_conn conn, String tbl, Dbmeta_idx_itm[] idx_ary) {
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int len = idx_ary.length;
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for (int i = 0; i < len; ++i) {
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Dbmeta_idx_itm idx = idx_ary[i];
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String idx_sql = idx.To_sql_create(conn.Engine().Sql_wtr());
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usr_dlg.Plog_many("", "", "creating index: ~{0} ~{1}", tbl, idx_sql);
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conn.Exec_qry(Db_qry_sql.ddl_(idx.To_sql_create(conn.Engine().Sql_wtr())));
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usr_dlg.Log_many("", "", "index created: ~{0} ~{1}", tbl, idx_sql);
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}
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}
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public static void Idx_create(Db_conn p, Db_idx_itm... idxs) {Idx_create(Gfo_usr_dlg_.Noop, p, "", idxs);}
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public static void Idx_create(Gfo_usr_dlg usr_dlg, Db_conn p, String file_id, Db_idx_itm... idxs) {
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int len = idxs.length;
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for (int i = 0; i < len; i++) {
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String index = idxs[i].Xto_sql();
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usr_dlg.Plog_many("", "", "creating index: ~{0} ~{1}", file_id, index);
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p.Exec_qry(Db_qry_sql.ddl_(index));
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usr_dlg.Log_many("", "", "index created: ~{0} ~{1}", file_id, index);
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}
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}
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public static Db_conn Conn_load_or_make_(Io_url url, Bool_obj_ref created) {
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boolean exists = Io_mgr.Instance.ExistsFil(url);
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created.Val_(!exists);
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Db_conn_info connect = exists ? Sqlite_conn_info.load_(url) : Sqlite_conn_info.make_(url);
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Db_conn p = Db_conn_pool.Instance.Get_or_new(connect);
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if (!exists)
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Pragma_page_size(p, 4096);
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return p;
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}
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public static final int Stmt_arg_max = 999; // 999 is max number of variables allowed by sqlite
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public static final boolean Supports_read_binary_stream = false;
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public static final boolean Supports_indexed_by = true;
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public static String X_date_to_str(DateAdp v) {return v == Date_null ? "" : v.XtoStr_fmt_iso_8561();}
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public static final DateAdp Date_null = null;
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public static final byte Wildcard_byte = Byte_ascii.Hash;
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}
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