// Persist library : Persistence layer
// Copyright (C) 2003 Vincent Daron
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
using System;
using System.Collections;
using Persist.Maps;
using Persist.Sql;
namespace Persist.Criteria{
/**
* Insert the type's description here.
* @author: Artyom Rudoy
*/
public class NotEqualToCriteria : SelectionCriteria
{
internal NotEqualToCriteria(ClassMap classMap, AttributeMap attributeMap):base(classMap, attributeMap)
{
}
/**
* asSqlClause method comment.
*/
public override void FillSqlStatement(SqlStatement statement, Queue parameters)
{
ColumnMap cm = AttributeMap.ColumnMap;
if(cm == null)
{
throw new Exception("No Column Map specified for attribute :"+AttributeMap.Name+" of type "+ClassMap.TypeName);
}
object parameter = parameters.Dequeue();
if(parameter != System.DBNull.Value)
{
statement.AddSqlClause(cm.FullyQualifiedName + " != ");
statement.AddSqlParameter();
statement.AddParameter(cm.Converter.ConvertFrom(parameter),cm.DbType);
}
else
{
statement.AddSqlClause(cm.FullyQualifiedName + " " + ClassMap.RelationalDatabase.ClauseStringIs + " " + ClassMap.RelationalDatabase.ClauseStringNot + " NULL");
}
}
}
}
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