public override IEnumerable <FreeDocument> Generate(IFreeDocument document = null)
{
var mount = 0;
if (Mount < 0)
{
mount = int.MaxValue;
}
TableInfo table = TableNames.SelectItem;
if (table != null)
{
var con = new VirtualDataCollection(table.GetVirtualProvider <IFreeDocument>());
foreach (var item in con.ComputeData.Skip(Position).Take(mount).Select(d => d.DictSerialize()))
{
yield return(item);
}
}
}
/// <summary>
/// 获取一定范围的实体
/// </summary>
/// <param name="tableName"></param>
/// <param name="type"></param>
/// <param name="mount"></param>
/// <param name="skip"></param>
/// <returns></returns>
public override IEnumerable <IFreeDocument> GetEntities(
string tableName, Type type, int mount = -1, int skip = 0)
{
if (IsUseable == false)
{
yield break;
}
if (TableNames == null)
{
IsUseable = false;
yield break;
}
if (TableNames == null)
{
IsUseable = false;
yield break;
}
TableInfo table = TableNames.Collection.FirstOrDefault(d => d.Name == tableName);
if (table == null)
{
yield break;
}
ICursor <Document> collection = null;
if (table.ColumnInfos != null && table.ColumnInfos.FirstOrDefault(d => d.Name == AutoIndexName) != null)
{
var query = new Document();
query[AutoIndexName] = new Document("$gt", skip);
collection = DB.GetCollection <Document>(tableName).Find(query).Sort(AutoIndexName, IndexOrder.Ascending);
}
else
{
collection = DB.GetCollection <Document>(tableName).FindAll();
if (skip != 0)
{
collection.Skip(skip);
}
}
if (mount != -1)
{
collection = collection.Limit(mount);
}
foreach (Document document in collection.Documents)
{
IFreeDocument data = null;
if (type == null)
{
data = new FreeDocument();
}
else
{
data = (IFreeDocument)Activator.CreateInstance(type);
}
data.DictDeserialize(document);
yield return(data);
}
}