public StreamingObjectConstructor(DbDataReader source, ConstructorMetadata?constructor, IReadOnlyList <ColumnMetadata> nonNullableColumns, MaterializerTypeConverter converter)
{
m_Converter = converter ?? new();
m_Source = source;
m_Ordinals = new Dictionary <string, int>(source.FieldCount, StringComparer.OrdinalIgnoreCase);
m_NullableColumns = new Dictionary <int, bool>(source.FieldCount);
for (var i = 0; i < source.FieldCount; i++)
{
var columnName = source.GetName(i);
m_Ordinals.Add(columnName, i);
m_NullableColumns.Add(i, !nonNullableColumns.Any(c => c.SqlName == columnName)); //assume nullable unless proven otherwise
}
if (constructor == null)
{
constructor = MetadataCache.GetMetadata(typeof(T)).Constructors.Find(s_DefaultConstructor);
}
if (constructor == null)
{
throw new MappingException($"Cannot find a default constructor for {typeof(T).Name}");
}
var desiredType = typeof(T);
m_Constructor = constructor;
var constructorParameters = m_Constructor.ParameterNames;
for (var i = 0; i < constructorParameters.Length; i++)
{
if (!m_Ordinals.ContainsKey(constructorParameters[i]))
{
throw new MappingException($"Cannot find a column that matches the parameter {constructorParameters[i]}");
}
}
m_Dictionary = new StreamingObjectConstructorDictionary(this);
if (constructor.Signature.Length == 0)
{
m_MappedProperties = new List <OrdinalMappedProperty <T> >();
foreach (var mapper in s_AllMappedProperties)
{
if (m_Dictionary.ContainsKey(mapper.MappedColumnName))
{
m_MappedProperties.Add(new OrdinalMappedProperty <T>(mapper, m_Ordinals[mapper.MappedColumnName]));
}
}
}
}
public StreamingObjectConstructor(DbDataReader source, IReadOnlyList <Type> constructorSignature, IReadOnlyList <ColumnMetadata> nonNullableColumns)
{
m_Source = source;
m_Ordinals = new Dictionary <string, int>(source.FieldCount, StringComparer.OrdinalIgnoreCase);
m_NullableColumns = new Dictionary <int, bool>(source.FieldCount);
for (var i = 0; i < source.FieldCount; i++)
{
var columnName = source.GetName(i);
m_Ordinals.Add(columnName, i);
m_NullableColumns.Add(i, !nonNullableColumns.Any(c => c.SqlName == columnName)); //assume nullable unless proven otherwise
}
constructorSignature = constructorSignature ?? s_DefaultConstructor;
var desiredType = typeof(T);
m_Constructor = MetadataCache.GetMetadata(desiredType).Constructors.Find(constructorSignature);
if (m_Constructor == null)
{
var types = string.Join(", ", constructorSignature.Select(t => t.Name));
throw new MappingException($"Cannot find a constructor on {desiredType.Name} with the types [{types}]");
}
var constructorParameters = m_Constructor.ParameterNames;
for (var i = 0; i < constructorParameters.Length; i++)
{
if (!m_Ordinals.ContainsKey(constructorParameters[i]))
{
throw new MappingException($"Cannot find a column that matches the parameter {constructorParameters[i]}");
}
}
m_PopulateComplexObject = constructorSignature.Count == 0;
m_Dictionary = new StreamingObjectConstructorDictionary(this);
if (m_PopulateComplexObject)
{
m_MappedProperties = new List <OrdinalMappedProperty <T> >();
foreach (var mapper in s_AllMappedProperties)
{
if (m_Dictionary.ContainsKey(mapper.MappedColumnName))
{
m_MappedProperties.Add(new OrdinalMappedProperty <T>(mapper, m_Ordinals[mapper.MappedColumnName]));
}
}
}
}