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/*
* Copyright (c) Tribal Media AB, http://tribalmedia.se/
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * The name of Tribal Media AB may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
using System;
using System.Data;
using System.Data.Common;
namespace TribalMedia.Framework.Data
{
public abstract class ObjectTableMapper<TRowMapper, TPrimaryKey> : TableMapper
{
public ObjectTableMapper(DatabaseMapper connectionPool, string tableName)
: base(connectionPool, tableName)
{
}
public bool TryGetValue(TPrimaryKey primaryKey, out TRowMapper value)
{
TRowMapper result = default(TRowMapper);
bool success = false;
WithConnection(delegate(DbConnection connection)
{
using (
DbCommand command =
CreateSelectCommand(connection, KeyFieldMapper.FieldName, primaryKey))
{
using (IDataReader reader = command.ExecuteReader())
{
if (reader.Read())
{
result = FromReader(new DataReader(reader));
success = true;
}
else
{
success = false;
}
}
}
});
value = result;
return success;
}
public virtual bool Remove(TPrimaryKey id)
{
int deleted = 0;
WithConnection(delegate(DbConnection connection)
{
using (
DbCommand command =
CreateDeleteCommand(connection, KeyFieldMapper.FieldName, id))
{
deleted = command.ExecuteNonQuery();
}
});
if (deleted == 1)
{
return true;
}
else
{
return false;
}
}
public DbCommand CreateDeleteCommand(DbConnection connection, string fieldName, TPrimaryKey primaryKey)
{
string table = TableName;
DbCommand command = connection.CreateCommand();
string conditionString = CreateCondition(command, fieldName, primaryKey);
string query =
String.Format("delete from {0} where {1}", table, conditionString);
command.CommandText = query;
command.CommandType = CommandType.Text;
return command;
}
public virtual bool Update(TPrimaryKey primaryKey, TRowMapper value)
{
int updated = 0;
WithConnection(delegate(DbConnection connection)
{
using (DbCommand command = CreateUpdateCommand(connection, value, primaryKey))
{
updated = command.ExecuteNonQuery();
}
});
if (updated == 1)
{
return true;
}
else
{
return false;
}
}
public virtual bool Add(TRowMapper value)
{
int added = 0;
WithConnection(delegate(DbConnection connection)
{
using (DbCommand command = CreateInsertCommand(connection, value))
{
added = command.ExecuteNonQuery();
}
});
if (added == 1)
{
return true;
}
else
{
return false;
}
}
public abstract TRowMapper FromReader(DataReader reader);
}
}
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