private ParameterSource CreateParameterSourceOfFindOrderDetailByCriterion(int orderId)
{
Criterion orderCriterion = new Criterion
{
IsKeyParam = true,
ParamName = "@OrderID",
ParamType = DbType.Int32,
ParamValue = orderId
};
ParameterSource parameterSource = new ParameterSource();
parameterSource.AddCriterion(orderCriterion);
return(parameterSource);
}
private ParameterSource CreateParameterSourceOfFindCategoryById(int categoryId)
{
Criterion categoryCriterion = new Criterion
{
IsKeyParam = true,
ParamName = "@CategoryID",
ParamType = DbType.Int32,
ParamValue = categoryId
};
ParameterSource parameterSource = new ParameterSource();
parameterSource.AddCriterion(categoryCriterion);
return(parameterSource);
}
private ParameterSource CreateParameterSourceOfFindProductById(int productId)
{
Criterion productCriterion = new Criterion
{
IsKeyParam = true,
ParamName = "@ProductID",
ParamType = DbType.Int32,
ParamValue = productId
};
ParameterSource parameterSource = new ParameterSource();
parameterSource.AddCriterion(productCriterion);
return(parameterSource);
}
protected DomainObject AbstractFindSingleWithParameterSource(Type type, ParameterSource parameterSource)
{
// Check identity map.
DomainObject result = identityMap.GetDomainObject(type, parameterSource.UniqueId);
if (result != null)
{
return(result);
}
// Identity map not hit, do query.
using (DbConnection connection = providerFactory.CreateConnection())
{
connection.ConnectionString = DbSettings.ConnectionString;
connection.Open();
DbCommand command = providerFactory.CreateCommand();
command.Connection = connection;
command.CommandText = FindSingleStatement(); // Find single, implement by derived class.
foreach (Criterion criterion in parameterSource.GetAllCriteria())
{
DbParameter parameter = providerFactory.CreateParameter();
parameter.ParameterName = criterion.ParamName;
parameter.DbType = criterion.ParamType;
parameter.Value = criterion.ParamValue;
command.Parameters.Add(parameter);
}
DbDataReader reader = command.ExecuteReader();
reader.Read();
int AffectedRows = reader.RecordsAffected;
Console.WriteLine("Find() RowsAffected: {0}", AffectedRows);
DomainObject domainObject = Load(type, parameterSource.UniqueId, (IDataRecord)reader);
return(domainObject);
}
}
public OrderDetail FindOrderDetailById(int orderId, int productId)
{
ParameterSource parameterSource = CreateParameterSourceOfFindOrderDetailById(orderId, productId);
return((OrderDetail)AbstractFindSingleWithParameterSource(typeof(OrderDetail), parameterSource));
}
public Category FindCategoryById(int categoryId)
{
ParameterSource parameterSource = CreateParameterSourceOfFindCategoryById(categoryId);
return((Category)AbstractFindSingleWithParameterSource(typeof(Category), parameterSource));
}
public Product FindProductById(int productId)
{
ParameterSource parameterSource = CreateParameterSourceOfFindProductById(productId);
return((Product)AbstractFindSingleWithParameterSource(typeof(Product), parameterSource));
}
protected IList <DomainObject> AbstractFindManyWithParameterSource(Type type, ParameterSource parameterSource)
{
using (DbConnection connection = providerFactory.CreateConnection())
{
connection.ConnectionString = DbSettings.ConnectionString;
connection.Open();
DbCommand command = providerFactory.CreateCommand();
command.Connection = connection;
command.CommandText = FindManyStatement(); // Find many, implement by derived class.
foreach (Criterion criterion in parameterSource.GetAllCriteria())
{
DbParameter parameter = providerFactory.CreateParameter();
parameter.ParameterName = criterion.ParamName;
parameter.DbType = criterion.ParamType;
parameter.Value = criterion.ParamValue;
command.Parameters.Add(parameter);
}
DbDataReader reader = command.ExecuteReader();
int AffectedRows = reader.RecordsAffected;
Console.WriteLine("Find() RowsAffected: {0}", AffectedRows);
IList <DomainObject> results = new List <DomainObject>();
while (reader.Read())
{
string UniqueId = GetUniqueId((IDataRecord)reader);
DomainObject item = Load(type, UniqueId, (IDataRecord)reader);
results.Add(item);
}
return(results);
}
}