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// Copyright (c) 2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
//
// MySQL Connector/NET is licensed under the terms of the GPLv2
// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
// MySQL Connectors. There are special exceptions to the terms and
// conditions of the GPLv2 as it is applied to this software, see the
// FLOSS License Exception
// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published
// by the Free Software Foundation; version 2 of the License.
//
// 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 General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace MySql.Data.Entity
{
abstract class InputFragment : SqlFragment
{
// not all input classes will support two inputs but union and join do
// in cases where only one input is used, Left is it
public InputFragment Left;
public InputFragment Right;
public InputFragment()
{
}
public InputFragment(string name)
{
Name = name;
}
public string Name { get; set; }
public bool IsWrapped { get; private set; }
public bool Scoped { get; set; }
public virtual void Wrap(Scope scope)
{
IsWrapped = true;
Scoped = true;
if (scope == null) return;
if (Left != null)
scope.Remove(Left);
if (Right != null)
scope.Remove(Right);
}
public virtual void WriteInnerSql(StringBuilder sql)
{
}
public override void WriteSql(StringBuilder sql)
{
if (IsWrapped)
sql.Append("(");
WriteInnerSql(sql);
if (IsWrapped)
sql.Append(")");
if (Name == null) return;
if (this is TableFragment ||
(IsWrapped && !(this is JoinFragment)))
sql.AppendFormat(" AS {0}", QuoteIdentifier(Name));
}
public ColumnFragment GetColumnFromProperties(PropertyFragment properties)
{
ColumnFragment col = Left.GetColumnFromProperties(properties);
if (col == null)
col = Right.GetColumnFromProperties(properties);
return col;
}
}
}
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