/// <summary>
/// Gets the column names for the entity reference specified.
/// </summary>
/// <param name="entityReference">
/// The entity reference.
/// </param>
/// <returns>
/// The column names.
/// </returns>
internal IEnumerable<string> ColumnNames(EntityReference entityReference)
{
var distinctColumnBindings = this.DistinctColumnBindingsForType(entityReference.EntityType).ToList();
if (distinctColumnBindings.Count <= 1)
{
return distinctColumnBindings.Select(ColumnName);
}
var columnBindingComparer = new ColumnBindingComparer();
var columnFamilyBindings = new Dictionary<string, HashSet<IColumnBinding>>(StringComparer.Ordinal);
foreach (var binding in distinctColumnBindings)
{
HashSet<IColumnBinding> columnBindings;
if (!columnFamilyBindings.TryGetValue(binding.ColumnFamily, out columnBindings))
{
columnFamilyBindings.Add(binding.ColumnFamily, columnBindings = new HashSet<IColumnBinding>(columnBindingComparer));
}
columnBindings.Add(binding);
}
var registeredColumnNames = this.RegisteredColumnNames();
foreach (var binding in distinctColumnBindings.Where(b => b.ColumnQualifier != null))
{
ISet<string> columnQualifiers;
if (registeredColumnNames.TryGetValue(binding.ColumnFamily, out columnQualifiers))
{
if (columnQualifiers.Remove(binding.ColumnQualifier) && columnQualifiers.Count == 0)
{
columnFamilyBindings[binding.ColumnFamily] = new HashSet<IColumnBinding> { new ColumnBinding(binding.ColumnFamily) };
}
}
}
return columnFamilyBindings.Values.SelectMany(s => s).Select(ColumnName);
}
/// <summary>
/// Reads all entities which belongs to the given scan specification from the database.
/// </summary>
/// <param name="entityContext">
/// The entity context.
/// </param>
/// <param name="entityReference">
/// The entity reference.
/// </param>
/// <param name="scanSpec">
/// The scan spec.
/// </param>
/// <param name="entitySink">
/// The entity sink, receives the entities fetched.
/// </param>
/// <param name="behaviors">
/// The behaviors.
/// </param>
internal static void Read(EntityContext entityContext, EntityReference entityReference, ScanSpec scanSpec, Action<object> entitySink, Behaviors behaviors)
{
var entityScanResult = new EntityScanResult(entityReference, entitySink);
var entityScanner = new EntityScanner(entityContext);
entityScanner.Add(entityScanResult, scanSpec);
new EntityReader(entityScanner, behaviors).Read();
}
/// <summary>
/// The deserializing entity callback.
/// </summary>
/// <param name="entityReference">
/// The entity reference.
/// </param>
/// <param name="destinationType">
/// The destination type.
/// </param>
/// <param name="entity">
/// The entity.
/// </param>
private void DeserializingEntity(EntityReference entityReference, Type destinationType, object entity)
{
this.entitiesFetched.TryAdd(this.fetchedCell.EntityScanTarget, entity);
entityReference.SetKey(entity, this.fetchedCell.Cell.Key);
}
/// <summary>
/// Reads all entities which belongs to the given scan specification from the database.
/// </summary>
/// <param name="entityContext">
/// The entity context.
/// </param>
/// <param name="entityReference">
/// The entity reference.
/// </param>
/// <param name="scanSpec">
/// The scan spec.
/// </param>
/// <param name="behaviors">
/// The behaviors.
/// </param>
/// <returns>
/// The entities.
/// </returns>
internal static IEnumerable Read(EntityContext entityContext, EntityReference entityReference, ScanSpec scanSpec, Behaviors behaviors)
{
var entityScanResult = new EntityScanResult(entityReference);
var entityScanner = new EntityScanner(entityContext);
entityScanner.Add(entityScanResult, scanSpec);
new EntityReader(entityScanner, behaviors).Read();
return entityScanResult.Values;
}
/// <summary>
/// Reads all entities which belongs to the given database keys from the database.
/// </summary>
/// <param name="entityContext">
/// The entity context.
/// </param>
/// <param name="entityReference">
/// The entity reference.
/// </param>
/// <param name="keys">
/// The entity keys.
/// </param>
/// <param name="entitySink">
/// The entity sink, receives the entities fetched.
/// </param>
/// <param name="behaviors">
/// The behaviors.
/// </param>
internal static void Read(EntityContext entityContext, EntityReference entityReference, IEnumerable keys, Action<object> entitySink, Behaviors behaviors)
{
var entityScanner = new EntityScanner(entityContext);
var entityScanTargets = new ChunkedCollection<EntityScanTarget>();
foreach (var key in keys)
{
if (key != null)
{
var entityScanTarget = new EntityScanTarget(entityReference, entityReference.GetKeyFromObject(key, false), entitySink);
entityScanTargets.Add(entityScanTarget);
entityScanner.Add(entityScanTarget);
}
}
new EntityReader(entityScanner, behaviors).Read();
}
/// <summary>
/// Reads an entity which belongs to the given database key from the database.
/// </summary>
/// <param name="entityContext">
/// The entity context.
/// </param>
/// <param name="entityReference">
/// The entity reference.
/// </param>
/// <param name="key">
/// The database key.
/// </param>
/// <param name="behaviors">
/// The behaviors.
/// </param>
/// <returns>
/// The entity.
/// </returns>
internal static object Read(EntityContext entityContext, EntityReference entityReference, object key, Behaviors behaviors)
{
var entityScanTarget = new EntityScanTarget(entityReference, key);
var entityScanner = new EntityScanner(entityContext);
entityScanner.Add(entityScanTarget);
new EntityReader(entityScanner, behaviors).Read();
return entityScanTarget.Value;
}
/// <summary>
/// Initializes a new instance of the <see cref="EntityReference"/> class.
/// </summary>
/// <param name="entityReference">
/// The entity reference.
/// </param>
/// <exception cref="ArgumentNullException">
/// If <paramref name="entityReference"/> is null.
/// </exception>
internal EntityReference(EntityReference entityReference)
{
if (entityReference == null)
{
throw new ArgumentNullException("entityReference");
}
this.entityType = entityReference.entityType;
this.tableBinding = entityReference.tableBinding;
this.columnBinding = entityReference.columnBinding;
this.keyBinding = entityReference.keyBinding;
}
/// <summary>
/// The deserializing entity callback.
/// </summary>
/// <param name="entityReference">
/// The entity reference.
/// </param>
/// <param name="destinationType">
/// The destination type.
/// </param>
/// <param name="entity">
/// The entity.
/// </param>
private void DeserializingEntity(EntityReference entityReference, Type destinationType, object entity)
{
this.entitiesFetched.TryAdd(this.fetchedCell.EntityScanTarget, entity);
entityReference.SetKey(entity, this.fetchedCell.Cell.Key);
}
