/// <summary>
/// Delete one dataBlock
/// </summary>
public DataBlock Delete(CollectionPage col, PageAddress blockAddress)
{
// get page and mark as dirty
var page = _pager.GetPage <DataPage>(blockAddress.PageID);
var block = page.GetBlock(blockAddress.Index);
// if there a extended page, delete all
if (block.ExtendPageID != uint.MaxValue)
{
_pager.DeletePage(block.ExtendPageID, true);
}
// delete block inside page
page.DeleteBlock(block);
// set page as dirty here
_pager.SetDirty(page);
// if there is no more datablocks, lets delete all page
if (page.BlocksCount == 0)
{
// first, remove from free list
_pager.AddOrRemoveToFreeList(false, page, col, ref col.FreeDataPageID);
_pager.DeletePage(page.PageID);
}
else
{
// add or remove to free list
_pager.AddOrRemoveToFreeList(page.FreeBytes > DataPage.DATA_RESERVED_BYTES, page, col, ref col.FreeDataPageID);
}
col.DocumentCount--;
// mark collection page as dirty
_pager.SetDirty(col);
return(block);
}
public void Write(PageAddress value)
{
this.Write(value.PageID);
this.Write(value.Index);
}
/// <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.GetBlock(blockAddress.Index));
}