public ITypeMetadata Resolve(TypeHandle th)
{
if (!m_MetadataCache.TryGetValue(th, out ITypeMetadata metadata))
{
metadata = m_MetadataCache[th] = m_Factory.Create(th);
}
return(metadata);
}
public void BuildParameters(IDbCommand cmd, object param)
{
foreach (var accessor in metadataFactory.Create(param.GetType()).GetParameterAccessors())
{
var parameter = cmd.CreateParameter();
parameter.ParameterName = accessor.Name;
var value = accessor.GetValue(param) ?? DBNull.Value;
parameter.DbType = dbTypeMap.LookupDbType(accessor.Type);
parameter.Value = value;
cmd.Parameters.Add(parameter);
}
}
/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="factory"></param>
/// <param name="reader"></param>
/// <param name="converter"></param>
/// <returns></returns>
public IEnumerable <T> Handle <T>(Func <T> factory, IDataReader reader, ObjectConverter converter)
{
using (reader)
{
var metadata = metadataFactory.Create(typeof(T));
var columns = new string[reader.FieldCount];
var accessors = new IAccessor[reader.FieldCount];
for (var i = 0; i < columns.Length; i++)
{
var name = reader.GetName(i);
columns[i] = name;
accessors[i] = metadata.GetMapAccessor(name);
}
while (reader.Read())
{
var entity = factory();
for (var i = 0; i < columns.Length; i++)
{
var accessor = accessors[i];
if (accessor == null)
{
continue;
}
if (reader.IsDBNull(i))
{
accessor.SetValue(entity, accessor.Type.GetDefaultValue());
}
else
{
var value = reader[columns[i]];
if (accessor.Type != value.GetType())
{
value = converter.Convert(value, accessor.Type);
}
accessor.SetValue(entity, value);
}
}
yield return(entity);
}
}
}
public ITypeMetadata Create(TypeHandle th)
{
ITypeMetadata metadata = m_DecoratedFactory.Create(th);
return(new CachedTypeMetadata(metadata));
}
