public virtual object Search(Transaction trans, object key)
{
BTreePointer bTreePointer = SearchPointer(trans, key);
if (bTreePointer != null)
{
return(bTreePointer.Key());
}
return(null);
}
public int CompareTo(Db4objects.Db4o.Internal.Btree.BTreePointer y)
{
if (null == y)
{
throw new ArgumentNullException();
}
if (Btree() != y.Btree())
{
throw new ArgumentException();
}
return(Btree().CompareKeys(_transaction.Context(), Key(), y.Key()));
}
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 object Remove(Transaction trans, object key)
{
BTreePointer bTreePointer = SearchPointer(trans, key);
if (bTreePointer == null)
{
return(null);
}
object result = bTreePointer.Key();
Enlist(trans);
IPreparedComparison preparedComparison = KeyHandler().PrepareComparison(trans.Context
(), key);
BTreeNode node = bTreePointer.Node();
node.Remove(trans, preparedComparison, key, bTreePointer.Index());
ConvertCacheEvictedNodesToReadMode();
return(result);
}
public virtual BTreePointer SearchPointer(Transaction trans, object key)
{
EnsureActive(trans);
KeyCantBeNull(key);
IPreparedComparison preparedComparison = KeyHandler().PrepareComparison(trans.Context
(), key);
BTreeNodeSearchResult start = SearchLeaf(trans, preparedComparison, SearchTarget.
Lowest);
BTreePointer bTreePointer = start.FirstValidPointer();
if (bTreePointer == null)
{
ConvertCacheEvictedNodesToReadMode();
return(null);
}
object found = bTreePointer.Key();
ConvertCacheEvictedNodesToReadMode();
if (preparedComparison.CompareTo(found) == 0)
{
return(bTreePointer);
}
return(null);
}
protected virtual void AssertPointerKey(int key, BTreePointer pointer)
{
Assert.AreEqual(key, pointer.Key());
}
public int CompareTo(BTreePointer y)
{
if (null == y)
{
throw new ArgumentNullException();
}
if (Btree() != y.Btree())
{
throw new ArgumentException();
}
return Btree().CompareKeys(_transaction.Context(), Key(), y.Key());
}