/// <summary>
/// Search the key in current node only, if key exits, return the key, otherwise, possibleNode is next node's
/// segment id where the key is possibly stored.
/// </summary>
/// <param name="target"></param>
/// <returns></returns>
public IKey SearchKey(IKey target, ref int pos)
{
//Debug.Assert(this.m_keyNums >= ((m_order-1) >> 2));
pos = 0;
while (pos < this.m_keyNums && target.CompareTo(this.m_keys[pos]) > 0)
{
pos++;
}
if (pos < this.m_keyNums && target.CompareTo(this.m_keys[pos]) == 0)
{
//found
return(this.m_keys[pos]);
}
else
{
//not found
return(null);
}
}
public bool ReplaceKeyDataWSuccessor(IKey oldKey, IKey successor, int pos)
{
Debug.Assert(pos < this.m_keys.Length);
Debug.Assert(m_keys[pos].CompareTo(oldKey) == 0);
Debug.Assert(oldKey.CompareTo(successor) < 0);
m_keys[pos] = successor;
this.m_dirty = true;
return(true);
}
public IValue Get(IKey key)
{
if (GetHelper(key))
{
List <TS_Offset> offsets = index[key];
long offset = offsets.Last().offset;
DataBlock <KeyType, ValType> db = ReadDataBlock(offset);
IKey ikey = db.key;
IValue value = db.value;
if (key.CompareTo(ikey) == 0)
{
return(value);
}
else
{
// collision?
// TODO: need to handle collision?
throw new InvalidDataException("Key mismatch (unhandled key collision)");
}
}
return(null);
}
/// <summary>
/// Search the key in current node only, if key exits, return the key, otherwise, possibleNode is next node's
/// segment id where the key is possibly stored.
/// </summary>
/// <param name="target"></param>
/// <returns></returns>
public IKey SearchKey(IKey target, ref int pos)
{
//Debug.Assert(this.m_keyNums >= ((m_order-1) >> 2));
pos = 0;
while (pos < this.m_keyNums && target.CompareTo(this.m_keys[pos])>0)
pos ++;
if (pos < this.m_keyNums && target.CompareTo(this.m_keys[pos])==0)
{
//found
return this.m_keys[pos];
}
else
{
//not found
return null;
}
}
public bool ReplaceKeyDataWSuccessor(IKey oldKey, IKey successor, int pos)
{
Debug.Assert(pos < this.m_keys.Length);
Debug.Assert(m_keys[pos].CompareTo(oldKey) == 0);
Debug.Assert(oldKey.CompareTo(successor) < 0);
m_keys[pos] = successor;
this.m_dirty = true;
return true;
}
