/// <summary>
/// Get a exist collection. Returns null if not exists
/// </summary>
public CollectionPage Get(string name)
{
if (string.IsNullOrEmpty(name))
{
throw new ArgumentNullException(nameof(name));
}
var header = _pager.GetPage <HeaderPage>(0);
uint pageID;
if (header.CollectionPages.TryGetValue(name, out pageID))
{
return(_pager.GetPage <CollectionPage>(pageID));
}
throw new Exception("Collection not found: " + name);
}
/// <summary>
/// Get a node inside a page using PageAddress - Returns null if address IsEmpty
/// </summary>
public IndexNode GetNode(LiteDB.PageAddress address)
{
if (address.IsEmpty)
{
return(null);
}
var page = _pager.GetPage <IndexPage>(address.PageID);
return(page.Nodes[address.Index]);
}
/// <summary>
/// Get all collections names from header
/// </summary>
public IEnumerable <string> GetCollections()
{
var header = _pager.GetPage <HeaderPage>(0);
return(header.CollectionPages.Keys);
}
/// <summary>
/// Get a data block from a DataPage using address
/// </summary>
public DataBlock GetBlock(PageAddress blockAddress)
{
var page = _pager.GetPage <DataPage>(blockAddress.PageID);
return(page.DataBlocks[blockAddress.Index]);
}