/*
XOWA: the XOWA Offline Wiki Application
Copyright (C) 2012-2017 gnosygnu@gmail.com

XOWA is licensed under the terms of the General Public License (GPL) Version 3,
or alternatively under the terms of the Apache License Version 2.0.

You may use XOWA according to either of these licenses as is most appropriate
for your project on a case-by-case basis.

The terms of each license can be found in the source code repository:

GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
*/
package gplx.dbs; import gplx.*;
import gplx.dbs.metas.*; import gplx.dbs.sqls.*; import gplx.dbs.sqls.wtrs.*;
public class Dbmeta_idx_itm {
	public Dbmeta_idx_itm(boolean unique, String tbl, String name, Dbmeta_idx_fld[] flds) {
		this.tbl = tbl; this.name = name; this.unique = unique; this.Flds = flds;
	}
	public String Tbl() {return tbl;} private final    String tbl;
	public String Name() {return name;} private final    String name;		
	public boolean Unique() {return unique;} private final    boolean unique;
	public final    Dbmeta_idx_fld[] Flds;
	public String To_sql_create(Sql_qry_wtr sql_wtr) {return sql_wtr.Schema_wtr().Bld_create_idx(this);}
	public boolean Eq(Dbmeta_idx_itm comp) {
		return String_.Eq(name, comp.name)
			&& unique == comp.unique
			&& tbl == comp.tbl
			&& Dbmeta_idx_fld.Ary_eq(Flds, comp.Flds);
	}
	public static Dbmeta_idx_itm new_unique_by_name			(String tbl, String name, String... flds)			{return new Dbmeta_idx_itm(Bool_.Y, tbl, name, To_fld_ary(flds));}
	public static Dbmeta_idx_itm new_normal_by_name			(String tbl, String name, Dbmeta_idx_fld... flds)	{return new Dbmeta_idx_itm(Bool_.N, tbl, name, flds);}
	public static Dbmeta_idx_itm new_normal_by_name			(String tbl, String name, String... flds)	{return new Dbmeta_idx_itm(Bool_.N, tbl, name, To_fld_ary(flds));}
	public static Dbmeta_idx_itm new_unique_by_tbl			(String tbl, String name, String... flds)	{return new Dbmeta_idx_itm(Bool_.Y, tbl, Bld_idx_name(tbl, name), To_fld_ary(flds));}
	public static Dbmeta_idx_itm new_normal_by_tbl			(String tbl, String name, Dbmeta_idx_fld... flds)	{return new Dbmeta_idx_itm(Bool_.N, tbl, Bld_idx_name(tbl, name), flds);}
	public static Dbmeta_idx_itm new_normal_by_tbl			(String tbl, String name, String... flds)	{return new Dbmeta_idx_itm(Bool_.N, tbl, Bld_idx_name(tbl, name), To_fld_ary(flds));}
	public static Dbmeta_idx_itm new_unique_by_tbl_wo_null	(String tbl, String name, String... flds)	{return new Dbmeta_idx_itm(Bool_.Y, tbl, Bld_idx_name(tbl, name), To_fld_ary(flds));}
	public static Dbmeta_idx_itm new_normal_by_tbl_wo_null	(String tbl, String name, String... flds)	{return new Dbmeta_idx_itm(Bool_.N, tbl, Bld_idx_name(tbl, name), To_fld_ary(flds));}
	public static String Bld_idx_name(String tbl, String suffix) {return String_.Concat(tbl, "__", suffix);}
	public static final    Dbmeta_idx_itm[] Ary_empty = new Dbmeta_idx_itm[0];
	public static Dbmeta_idx_fld[] To_fld_ary(String[] ary) {
		int len = ary.length;
		Dbmeta_idx_fld[] rv = new Dbmeta_idx_fld[len];
		for (int i = 0; i < len; ++i) {
			String itm = ary[i]; if (itm == null) continue;
			rv[i] = new Dbmeta_idx_fld(itm, Dbmeta_idx_fld.Sort_tid__none);
		}
		return rv;
	}
}
