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47 lines
2.5 KiB
47 lines
2.5 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.sqls; import gplx.*; import gplx.dbs.*;
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import gplx.core.gfo_ndes.*; import gplx.core.type_xtns.*;
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public abstract class Sql_select_fld_base {
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public String Tbl() {return tbl;} public void Tbl_set(String val) {tbl = val;} private String tbl;
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public String Fld() {return fld;} public void Fld_set(String val) {fld = val;} private String fld;
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public String Alias() {return alias;} public void Alias_set(String val) {alias = val;} private String alias;
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public ClassXtn ValType() {return valType;} public void ValType_set(ClassXtn val) {valType = val;} ClassXtn valType = ObjectClassXtn.Instance;
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public abstract Object GroupBy_eval(Object groupByVal, Object curVal, ClassXtn type);
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@gplx.Virtual public void GroupBy_type(GfoFld fld) {this.ValType_set(fld.Type());}
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@gplx.Virtual public boolean Type_fld() {return true;}
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public abstract String XtoSql();
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public static final String Tbl_null = null;
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@gplx.Internal protected void ctor_(String tbl, String fld, String alias) {
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Tbl_set(tbl); Fld_set(fld); Alias_set(alias);
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}
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}
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class Sql_select_fld_wild extends Sql_select_fld_base {
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@Override public Object GroupBy_eval(Object groupByVal, Object curVal, ClassXtn type) {throw Err_.new_wo_type("group by eval not allowed on *");}
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@Override public void GroupBy_type(GfoFld fld) {throw Err_.new_wo_type("group by type not allowed on *");}
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@Override public String XtoSql() {return "*";}
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public static final Sql_select_fld_wild Instance = new Sql_select_fld_wild(); Sql_select_fld_wild() {this.ctor_(Tbl_null, "*", "*");}
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}
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abstract class Sql_select_fld_func_base extends Sql_select_fld_base {
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public abstract String XtoSql_functionName();
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@Override public boolean Type_fld() {return false;}
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@Override public String XtoSql() {
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return String_.Format("{0}({1}) AS {2}", XtoSql_functionName(), Fld(), Alias());
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}
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}
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