/*
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.dbs.metas.*;
public class Dbmeta_fld_itm {
	public Dbmeta_fld_itm(String name, Dbmeta_fld_tid type) {
		this.name = name; this.type = type;
		this.primary = false; this.autonum = false; this.default_val = Default_value_null;
	}
	public String			Name()			{return name;} private final String name;
	public Dbmeta_fld_tid	Type()			{return type;} private final Dbmeta_fld_tid type;
	public int				Nullable_tid()	{return nullable_tid;} public Dbmeta_fld_itm Nullable_tid_(int v) {nullable_tid = v; return this;} private int nullable_tid;
	public Dbmeta_fld_itm	Nullable_y_()	{return Nullable_tid_(Nullable_null);} 
	public boolean				Primary()		{return primary;} public Dbmeta_fld_itm Primary_y_() {primary = true; return this;} private boolean primary;
	public boolean				Autonum()		{return autonum;} public Dbmeta_fld_itm Autonum_y_() {autonum = true; return this;} private boolean autonum;
	public Object			Default()		{return default_val;} public Dbmeta_fld_itm Default_(Object v) {default_val = v; return this;} private Object default_val;
	public boolean Eq(Dbmeta_fld_itm comp) {
		return	String_.Eq(name, comp.name)
			&&	type.Eq(comp.type)
			&&	nullable_tid == comp.nullable_tid
			&&	primary == comp.primary
			&&	autonum == comp.autonum
			&& Object_.Eq(default_val, comp.default_val);
	}

	public static final int Nullable_unknown = 0, Nullable_null = 1, Nullable_not_null = 2;
	public static final Object Default_value_null = null;
	public static final String Key_null = null;
	public static final String[] Str_ary_empty = String_.Ary_empty;
	public static final Dbmeta_fld_itm[] Ary_empty = new Dbmeta_fld_itm[0];

	public static Dbmeta_fld_itm new_bool(String name)			{return new Dbmeta_fld_itm(name, Dbmeta_fld_tid.Itm__bool);}
	public static Dbmeta_fld_itm new_byte(String name)			{return new Dbmeta_fld_itm(name, Dbmeta_fld_tid.Itm__byte);}
	public static Dbmeta_fld_itm new_short(String name)			{return new Dbmeta_fld_itm(name, Dbmeta_fld_tid.Itm__short);}
	public static Dbmeta_fld_itm new_int(String name)			{return new Dbmeta_fld_itm(name, Dbmeta_fld_tid.Itm__int);}
	public static Dbmeta_fld_itm new_long(String name)			{return new Dbmeta_fld_itm(name, Dbmeta_fld_tid.Itm__long);}
	public static Dbmeta_fld_itm new_float(String name)			{return new Dbmeta_fld_itm(name, Dbmeta_fld_tid.Itm__float);}
	public static Dbmeta_fld_itm new_double(String name)		{return new Dbmeta_fld_itm(name, Dbmeta_fld_tid.Itm__double);}
	public static Dbmeta_fld_itm new_text(String name)			{return new Dbmeta_fld_itm(name, Dbmeta_fld_tid.Itm__text);}
	public static Dbmeta_fld_itm new_bry(String name)			{return new Dbmeta_fld_itm(name, Dbmeta_fld_tid.Itm__bry);}
	public static Dbmeta_fld_itm new_str(String name, int len)	{return new Dbmeta_fld_itm(name, Dbmeta_fld_tid.Itm__str(len));}
	public static String[] To_str_ary(Dbmeta_fld_itm[] ary) {
		int len = ary.length;
		String[] rv = new String[len];
		for (int i = 0; i < len; ++i)
			rv[i] = ary[i].name;
		return rv;
	}

	public static String Make_or_null(Db_conn conn, Dbmeta_fld_list flds, String tbl_name, int fld_type, Object fld_dflt, String fld_name) {
		boolean tbl_exists = conn.Meta_tbl_exists(tbl_name);
		boolean fld_exists = true;
		if (tbl_exists) {
			fld_exists = conn.Meta_fld_exists(tbl_name, fld_name);
			if (!fld_exists) return Dbmeta_fld_itm.Key_null;
		}
		Dbmeta_fld_itm fld = null;
		switch (fld_type) {
			case Dbmeta_fld_tid.Tid__int: fld = Dbmeta_fld_itm.new_int(fld_name); break;
		}
		if (fld_dflt != null) fld.Default_(fld_dflt);
		flds.Add(fld);
		return fld.name;
	}
	public static String To_double_str_by_int(int v) {return Int_.To_str(v) + ".0";}
}