public virtual bool MoveNext()
{
if (ReachedEnd(_cursor))
{
_current = null;
return(false);
}
_current = _cursor;
_cursor = _cursor.Next();
return(true);
}
private static BTreePointer NextPointerIf(BTreePointer pointer, bool condition)
{
if (null == pointer)
{
return null;
}
if (condition)
{
return pointer.Next();
}
return pointer;
}
public virtual BTreePointer FirstValidPointer()
{
if (null == _pointer)
{
return(null);
}
if (_pointer.IsValid())
{
return(_pointer);
}
return(_pointer.Next());
}
private static BTreePointer NextPointerIf(BTreePointer pointer, bool condition)
{
if (null == pointer)
{
return(null);
}
if (condition)
{
return(pointer.Next());
}
return(pointer);
}
public virtual void Clear(Transaction transaction)
{
BTreePointer currentPointer = FirstPointer(transaction);
while (currentPointer != null && currentPointer.IsValid())
{
BTreeNode node = currentPointer.Node();
int index = currentPointer.Index();
node.Remove(transaction, index);
currentPointer = currentPointer.Next();
}
}
private void AssertReadModePointerIteration(int[] expectedKeys, BTreePointer pointer
)
{
object[] expected = IntArrays4.ToObjectArray(expectedKeys);
for (int i = 0; i < expected.Length; i++)
{
Assert.IsNotNull(pointer, "Expected '" + expected[i] + "'");
Assert.AreNotSame(_btree.Root(), pointer.Node());
AssertInReadModeOrCached(pointer.Node());
Assert.AreEqual(expected[i], pointer.Key());
AssertInReadModeOrCached(pointer.Node());
pointer = pointer.Next();
}
}
public virtual bool MoveNext()
{
if (_beyondEnd)
{
return(false);
}
if (BeforeFirst())
{
_currentPointer = _bTree.FirstPointer(_transaction);
}
else
{
_currentPointer = _currentPointer.Next();
}
_beyondEnd = (_currentPointer == null);
return(!_beyondEnd);
}