/*
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.qrys; import gplx.*; import gplx.dbs.*;
import gplx.core.strings.*; import gplx.core.criterias.*;
public class Db_qry__select_in_tbl implements Db_qry {
	public Db_qry__select_in_tbl(String base_table, String[] select_flds, String[] where_flds, String group_by_sql, String having_sql, String order_by_sql, String limit_sql) {
		this.base_table = base_table; this.select_flds = select_flds; this.where_flds = where_flds; this.group_by_sql = group_by_sql; this.having_sql = having_sql; this.order_by_sql = order_by_sql; this.limit_sql = limit_sql;
	}
	public int			Tid() {return Db_qry_.Tid_select_in_tbl;}
	public boolean			Exec_is_rdr() {return true;}
	public String		Base_table() {return base_table;} private final String base_table;
	public Criteria		Where() {return where;} private Criteria where;
	public String[]		Select_flds() {return select_flds;} private final String[] select_flds;
	private final String[] where_flds;
	public void Where_sql(String_bldr sb) {
		if (where_flds == null) return;
		int where_flds_len = where_flds.length;
		if (where_flds_len == 0) return;
		for (int i = 0; i < where_flds_len; ++i) {
			if (i != 0) sb.Add("AND ");
			sb.Add(where_flds[i]).Add(" = ? ");
		}
	}
	public String Group_by_sql() {return group_by_sql;} private final String group_by_sql;
	public String Having_sql() {return having_sql;} private final String having_sql;
	public String Order_by_sql() {return order_by_sql;} public Db_qry__select_in_tbl Order_by_sql_(String v) {order_by_sql = v; return this;} private String order_by_sql;
	public String Limit_sql() {return limit_sql;} private final String limit_sql;
	public String To_sql__exec(gplx.dbs.sqls.Sql_qry_wtr wtr) {
		synchronized (this) {
			String_bldr sb = String_bldr_.new_();
			sb.Add("SELECT ");
			int select_flds_len = select_flds.length;
			for (int i = 0; i < select_flds_len; ++i) {
				if (i != 0) sb.Add(",");
				sb.Add(select_flds[i]);
			}
			sb.Add(" FROM ").Add(base_table);
			if (where_flds		!= null && where_flds.length != 0) {sb.Add(" WHERE "); Where_sql(sb);}
			if (group_by_sql	!= null) sb.Add(group_by_sql);
			if (having_sql		!= null) sb.Add(having_sql);
			if (order_by_sql	!= null) {sb.Add(" ORDER BY "); sb.Add(order_by_sql);}
			if (limit_sql		!= null) sb.Add(limit_sql);
			return sb.To_str();
		}
	}
	public static Db_qry__select_in_tbl new_(String base_table, String[] where_flds, String[] select_flds, String[] order_flds) {
		String order_by_sql = null;
		if (order_flds != Order_by_null) {
			int len = order_flds.length;
			switch (len) {
				case 0: break;
				case 1: order_by_sql = order_flds[0]; break;
				default:
					Bry_bfr bfr = Bry_bfr.new_();
					for (int i = 0; i < len; ++i) {
						String order_fld = order_flds[i];
						if (i != 0) bfr.Add_byte_comma();
						bfr.Add_str_a7(order_fld);
					}
					order_by_sql = bfr.To_str_and_clear();
					break;
			}
		}
		Db_qry__select_in_tbl rv = new Db_qry__select_in_tbl(base_table, select_flds, where_flds, null, null, order_by_sql, null);
		rv.where = where_flds.length == 0 ? Db_crt_.Wildcard : Db_crt_.eq_many_(where_flds);
		return rv;
	}
	public static Db_qry__select_in_tbl as_(Object obj) {return obj instanceof Db_qry__select_in_tbl ? (Db_qry__select_in_tbl)obj : null;}
	public static final String[] Where_flds__all = String_.Ary_empty;
	public static final String[] Order_by_null = null;
}