internal MaterializerEnumerator(DbDataReader reader, ExtensibleObjectContextBase context, bool skipDeletedItems)
{
this._reader = reader;
this._context = context;
this._skipDeletedItems = skipDeletedItems;
this._current = default(T);
}
internal EntityQuery(ExtensibleObjectContextBase context, string queryClause)
{
Type entityType = typeof(ExtensibleEntity);
//if (!entityType.IsAssignableFrom(typeof(T)))
// throw new ArgumentException("Must use a type inherited from ExtensibleEntity", "type");
this._queryClause = queryClause;
this._context = context;
}
public void Dispose()
{
DbDataReader readerTmp = this._reader;
this._reader = null;
this._context = null;
this._current = null;
if (readerTmp != null)
{
readerTmp.Dispose();
}
}
internal static IEnumerable <T> CreateObjects <T>(DbDataReader reader, ExtensibleObjectContextBase context, bool skipDeletedItems)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
if (context == null)
{
throw new ArgumentNullException("context");
}
if (reader.IsClosed)
{
throw new InvalidOperationException("The data reader is closed");
}
return(new MaterializerEnumerable <T>(reader, context, skipDeletedItems));
}
bool IEnumerator.MoveNext()
{
IExtensibleEntity deletedEntity;
if (_context == null)
{
return(false);
}
do
{
_current = null;
if (!this._reader.Read())
{
_context = null;
return(false);
}
this._current = EntityMaterializer.CreateObject(typeof(T), _reader, _context, _skipDeletedItems, out deletedEntity);
}while (deletedEntity != null && _skipDeletedItems);
return(true);
}
internal static IEnumerable <T> CreateObjects <T>(DbDataReader reader, ExtensibleObjectContextBase context)
{
return(CreateObjects <T>(reader, context, true));
}
private static IExtensibleEntity CreateEntity(Type entityType, IDataRecord dbReader, ExtensibleObjectContextBase context, bool withExtensionValues)
{
ExtensibleEntity entity = Activator.CreateInstance(entityType) as ExtensibleEntity;
EntityMetadata entityMetaData = ExtensibleEntity.GetEntityMetadata(entityType);
FieldMetadata[] fields = withExtensionValues?entityMetaData.Fields:entityMetaData.PreDefinedFields;
for (int i = 0; i < fields.Length; i++)
{
object value = dbReader[fields[i].Name]; //note: use .Name rather than .ColumnName
if (value is DBNull)
{
value = null;
}
entity.SetValueWithFlag(fields[i].Name, value, true); //don't set the dirty flag
}
return(entity);
}
private static IExtensibleEntity CreateObject(Type entityType, DbDataReader record, ExtensibleObjectContextBase context, bool updatableFromCache, bool skipDeletedItems, out IExtensibleEntity deletedEntity)
{
IExtensibleEntity returnEntity = null;
deletedEntity = null;
EntityKey key = CreateEntityKey(entityType, record);
EntityCacheEntry entry = context.Cache.FindCacheEntry(key);
if (entry != null)
{
returnEntity = entry.Entity;
switch (entry.State)
{
case EntityRowState.Added:
throw new InvalidOperationException("Added entity already exists in the cache");
case EntityRowState.Deleted:
deletedEntity = entry.Entity;
break;
}
if (deletedEntity != null && skipDeletedItems)
{
return(null);
}
else
{
return(returnEntity); //return the entity from the cache
}
}
returnEntity = CreateEntity(entityType, record, context, true); //create entity from db record
context.Cache.AddEntry(returnEntity, false);
return(returnEntity);
}
internal static object CreateObject(Type entityType, DbDataReader record, ExtensibleObjectContextBase context, bool skipDeletedItems, out IExtensibleEntity deletedEntity)
{
return(CreateObject(entityType, record, context, false, skipDeletedItems, out deletedEntity));
}
internal EntityQuery(ExtensibleObjectContextBase context, params KeyValuePair <string, object>[] conditions)
: this(context, ToSqlClause(conditions))
{
}
