public IEnumerable<LTrieRow> IterateBackwardSkip(ulong skippingQuantity, ITrieRootNode readRootNode)
{
this.CheckTableIsOperable();
if (readRootNode==null)
{
//Flashing changes on the disk before commit. In case if the same thread uses the same root node
this.SaveGenerationMap();
Backward bw = new Backward(rn);
return bw.IterateBackwardSkip(skippingQuantity,false);
}
else
{
Backward bw = new Backward((LTrieRootNode)readRootNode);
return bw.IterateBackwardSkip(skippingQuantity,true);
}
}
public IEnumerable<LTrieRow> IterateBackwardStartFrom(byte[] key, bool includeStartKey, ITrieRootNode readRootNode)
{
this.CheckTableIsOperable();
if (readRootNode==null)
{
//Flashing changes on the disk before commit. In case if the same thread uses the same root node
this.SaveGenerationMap();
Backward bw = new Backward(rn);
return bw.IterateBackwardStartFrom(key, includeStartKey,false);
}
else
{
Backward bw = new Backward((LTrieRootNode)readRootNode);
return bw.IterateBackwardStartFrom(key, includeStartKey,true);
}
}
public LTrieRow IterateBackwardForMaximal(ITrieRootNode readRootNode)
{
this.CheckTableIsOperable();
if (readRootNode==null)
{
//Flashing changes on the disk before commit. In case if the same thread uses the same root node
this.SaveGenerationMap();
Backward bw = new Backward(rn);
return bw.IterateBackwardForMaximal(false);
}
else
{
Backward bw = new Backward((LTrieRootNode)readRootNode);
return bw.IterateBackwardForMaximal(true);
}
}
/// <summary>
/// DBreeze compatible.
/// Extension, which helps to READ-THREADS smartly utilize created before read-roots
/// </summary>
/// <param name="key"></param>
/// <param name="readRootNode">if null then WRITE-ROOT NODE</param>
/// <returns></returns>
public LTrieRow GetKey(ref byte[] key, ITrieRootNode readRootNode)
{
this.CheckTableIsOperable();
if (readRootNode==null)
{
//Flashing changes on the disk before commit. In case if the same thread uses the same root node
this.SaveGenerationMap();
return rn.GetKey(key,false);
}
else
{
return ((LTrieRootNode)readRootNode).GetKey(key,true);
}
}
/// <summary>
/// Can be used inside of DBreeze - concerns all read functions
/// </summary>
/// <param name="SYNCHRO_READ"></param>
/// <returns></returns>
public ulong Count(ITrieRootNode readRootNode)
{
this.CheckTableIsOperable();
if (readRootNode==null)
{
//Flashing changes on the disk before commit. In case if the same thread uses the same root node
this.SaveGenerationMap();
return rn.RecordsCount;
}
else
{
//LTrieRootNode readRootNode = new LTrieRootNode(this);
return ((LTrieRootNode)readRootNode).RecordsCount;
}
}
/// <summary>
///
/// </summary>
/// <param name="startKey"></param>
/// <param name="readRootNode"></param>
/// <returns></returns>
public IEnumerable<LTrieRow> IterateForwardStartsWithClosestToPrefix(byte[] startKey, ITrieRootNode readRootNode)
{
this.CheckTableIsOperable();
if (readRootNode == null)
{
//Flashing changes on the disk before commit. In case if the same thread uses the same root node
this.SaveGenerationMap();
Forward bw = new Forward(rn);
return bw.IterateForwardStartsWithClosestToPrefix(startKey, false);
}
else
{
Forward bw = new Forward((LTrieRootNode)readRootNode);
return bw.IterateForwardStartsWithClosestToPrefix(startKey, true);
}
}
//bool SYNCHRO_READ
public IEnumerable<LTrieRow> IterateForward(ITrieRootNode readRootNode)
{
this.CheckTableIsOperable();
if (readRootNode == null) //SYNCHRO_READ
{
//Flashing changes on the disk before commit. In case if the same thread uses the same root node
this.SaveGenerationMap();
Forward fw = new Forward(rn);
return fw.IterateForward(false);
}
else
{
Forward fw = new Forward((LTrieRootNode)readRootNode);
return fw.IterateForward(true);
}
}
