/// <summary>
/// Returns an object reader for the given type that matches the given schema.
/// </summary>
/// <param name="command">The command associated with the reader.</param>
/// <param name="reader">The reader containing the schema to analyze.</param>
/// <param name="type">The type to analyze.</param>
/// <returns>An ObjectReader for the schema and type.</returns>
public static ObjectReader GetObjectReader(IDbCommand command, IDataReader reader, Type type)
{
SchemaIdentity schemaIdentity = new SchemaIdentity(reader);
var key = Tuple.Create(schemaIdentity, type);
return(_readerDataCache.GetOrAdd(key, k => new ObjectReader(command, k.Item2, reader)));
}
/// <summary>
/// Initializes a new instance of the SchemaMappingIdentity class.
/// </summary>
/// <param name="schemaIdentity">The identity of the schema to map to.</param>
/// <param name="recordReader">The reader to use to read the objects from the stream.</param>
/// <param name="mappingType">The type of mapping operation.</param>
public SchemaMappingIdentity(SchemaIdentity schemaIdentity, IRecordReader recordReader, SchemaMappingType mappingType)
{
if (recordReader == null)
{
throw new ArgumentNullException("recordReader");
}
// save the values away for later
RecordReader = recordReader;
_mappingType = mappingType;
_schemaIdentity = schemaIdentity;
// we know that we are going to store this in a hashtable, so pre-calculate the hashcode
unchecked
{
// base the hashcode on the mapping type, target graph, and schema contents
_hashCode = (int)_mappingType;
_hashCode *= 13;
_hashCode += RecordReader.GetHashCode();
_hashCode *= 13;
_hashCode += schemaIdentity.GetHashCode();
}
}
