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97 lines
2.9 KiB
C#
97 lines
2.9 KiB
C#
// Copyright © 2008, 2014, Oracle and/or its affiliates. All rights reserved.
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//
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// MySQL Connector/NET is licensed under the terms of the GPLv2
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// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
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// MySQL Connectors. There are special exceptions to the terms and
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// conditions of the GPLv2 as it is applied to this software, see the
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// FLOSS License Exception
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// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
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//
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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 General Public License as published
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// by the Free Software Foundation; version 2 of the License.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace MySql.Data.Entity
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{
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abstract class InputFragment : SqlFragment
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{
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// not all input classes will support two inputs but union and join do
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// in cases where only one input is used, Left is it
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public InputFragment Left;
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public InputFragment Right;
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public InputFragment()
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{
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}
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public InputFragment(string name)
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{
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Name = name;
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}
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public string Name { get; set; }
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public bool IsWrapped { get; private set; }
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public bool Scoped { get; set; }
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public virtual void Wrap(Scope scope)
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{
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IsWrapped = true;
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Scoped = true;
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if (scope == null) return;
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if (Left != null)
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scope.Remove(Left);
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if (Right != null)
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scope.Remove(Right);
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}
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public virtual void WriteInnerSql(StringBuilder sql)
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{
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}
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public override void WriteSql(StringBuilder sql)
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{
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if (IsWrapped)
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sql.Append("(");
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WriteInnerSql(sql);
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if (IsWrapped)
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sql.Append(")");
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if (Name == null) return;
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if (this is TableFragment ||
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(IsWrapped && !(this is JoinFragment)))
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sql.AppendFormat(" AS {0}", QuoteIdentifier(Name));
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}
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public ColumnFragment GetColumnFromProperties(PropertyFragment properties)
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{
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ColumnFragment col = Left.GetColumnFromProperties(properties);
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if (col == null)
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col = Right.GetColumnFromProperties(properties);
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return col;
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}
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internal override void Accept(SqlFragmentVisitor visitor)
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{
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if (Left != null)
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Left.Accept(visitor);
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if (Right != null)
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Right.Accept(visitor);
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}
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}
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}
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