private void ReadHeader(LiteDB.ByteReader reader)
{
// first 5 bytes (pageID + pageType) was readed before class create
// this.PageID
// this.PageType
this.PrevPageID = reader.ReadUInt32();
this.NextPageID = reader.ReadUInt32();
this.ItemCount = reader.ReadUInt16();
reader.ReadUInt16(); // FreeBytes;
reader.Skip(8); // reserved 8 bytes
}
protected override void ReadContent(LiteDB.ByteReader reader)
{
reader.ReadString(HEADER_INFO.Length);
reader.ReadByte();
this.ChangeID = reader.ReadUInt16();
this.FreeEmptyPageID = reader.ReadUInt32();
this.LastPageID = reader.ReadUInt32();
this.DbVersion = reader.ReadUInt16();
this.Password = reader.ReadBytes(this.Password.Length);
// read page collections references (position on end of page)
var cols = reader.ReadByte();
for (var i = 0; i < cols; i++)
{
this.CollectionPages.Add(reader.ReadString(), reader.ReadUInt32());
}
}
/// <summary>
/// Read a page with correct instance page object. Checks for pageType
/// </summary>
public static BasePage ReadPage(byte[] buffer)
{
var reader = new LiteDB.ByteReader(buffer);
var pageID = reader.ReadUInt32();
var pageType = (PageType)reader.ReadByte();
var page = CreateInstance(pageID, pageType);
page.ReadHeader(reader);
page.ReadContent(reader);
return(page);
}
protected override void ReadContent(LiteDB.ByteReader reader)
{
this.CollectionName = reader.ReadString();
this.FreeDataPageID = reader.ReadUInt32();
var uintCount = reader.ReadUInt32(); // read as uint (4 bytes)
foreach (var index in this.Indexes)
{
index.Field = reader.ReadString();
index.HeadNode = reader.ReadPageAddress();
index.TailNode = reader.ReadPageAddress();
index.FreeIndexPageID = reader.ReadUInt32();
index.Unique = reader.ReadBoolean();
reader.ReadBoolean(); // IgnoreCase
reader.ReadBoolean(); // TrimWhitespace
reader.ReadBoolean(); // EmptyStringToNull
reader.ReadBoolean(); // RemoveAccents
}
// be compatible with v2_beta
var longCount = reader.ReadInt64();
this.DocumentCount = Math.Max(uintCount, longCount);
}
protected override void ReadContent(LiteDB.ByteReader reader)
{
this.DataBlocks = new Dictionary <ushort, DataBlock>(ItemCount);
for (var i = 0; i < ItemCount; i++)
{
var block = new DataBlock();
block.Page = this;
block.Position = new LiteDB.PageAddress(this.PageID, reader.ReadUInt16());
block.ExtendPageID = reader.ReadUInt32();
for (var j = 0; j < CollectionIndex.INDEX_PER_COLLECTION; j++)
{
block.IndexRef[j] = reader.ReadPageAddress();
}
var size = reader.ReadUInt16();
block.Data = reader.ReadBytes(size);
this.DataBlocks.Add(block.Position.Index, block);
}
}