/// <summary>
/// Read all document based on collection name
/// </summary>
public IEnumerable <BsonDocument> GetDocuments(IndexInfo index)
{
using (var reader = _engine.Query(index.Collection, new Query()))
{
while (reader.Read())
{
yield return(reader.Current.AsDocument);
}
}
}
/// <summary>
/// Get all document using an indexInfo as start point (_id index).
/// </summary>
public IEnumerable <BsonDocument> GetDocuments(IndexInfo index)
{
var indexPages = this.VisitIndexPages(index.HeadPageID);
foreach (var indexPageID in indexPages)
{
var indexPage = this.ReadPage(indexPageID);
foreach (var node in indexPage["nodes"].AsArray)
{
var dataBlock = node["dataBlock"];
// if datablock link to a data page
if (dataBlock["pageID"].AsInt32 != -1)
{
// read dataPage and data block
var dataPage = this.ReadPage((uint)dataBlock["pageID"].AsInt32);
if (dataPage["pageType"].AsInt32 != 4)
{
continue;
}
var block = dataPage["blocks"].AsArray.FirstOrDefault(x => x["index"] == dataBlock["index"]).AsDocument;
if (block == null)
{
continue;
}
// read byte[] from block or from extend pages
var data = block["extendPageID"] == -1 ?
block["data"].AsBinary :
this.ReadExtendData((uint)block["extendPageID"].AsInt32);
if (data.Length == 0)
{
continue;
}
// BSON format still same from all version
var doc = BsonSerializer.Deserialize(data);
// change _id PK in _chunks collection
if (index.Collection == "_chunks")
{
var parts = doc["_id"].AsString.Split('\\');
if (!int.TryParse(parts[1], out var n))
{
throw LiteException.InvalidFormat("_id");
}
doc["_id"] = new BsonDocument
{
["f"] = parts[0],
["n"] = n
};
}
yield return(doc);
}
}
}
}
