public void TraverseValues(Transaction transaction, IVisitor4 userVisitor)
{
if (!Alive())
{
return;
}
AssertHasIndex();
ObjectContainerBase stream = transaction.Container();
if (stream.IsClient)
{
Exceptions4.ThrowRuntimeException(Db4objects.Db4o.Internal.Messages.ClientServerUnsupported
);
}
lock (stream.Lock())
{
IContext context = transaction.Context();
_index.TraverseKeys(transaction, new _IVisitor4_861(this, userVisitor, context));
}
}
public virtual BTreeNodeSearchResult SearchLeaf(Transaction trans, object key, SearchTarget
target)
{
return SearchLeaf(trans, _keyHandler.PrepareComparison(trans.Context(), key), target
);
}
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;
}
public virtual IBTreeRange SearchRange(Transaction trans, object key)
{
KeyCantBeNull(key);
return SearchRange(trans, KeyHandler().PrepareComparison(trans.Context(), key));
}
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 void Add(Transaction trans, object key)
{
KeyCantBeNull(key);
IPreparedComparison preparedComparison = _keyHandler.PrepareComparison(trans.Context
(), key);
Add(trans, preparedComparison, key);
}
public override void ReadThis(Transaction trans, ByteArrayBuffer reader)
{
ReadNodeHeader(reader);
PrepareArrays();
bool isInner = !_isLeaf;
for (int i = 0; i < _count; i++)
{
_keys[i] = KeyHandler().ReadIndexEntry(trans.Context(), reader);
if (isInner)
{
_children[i] = reader.ReadInt();
}
}
}
internal object Key(Transaction trans, ByteArrayBuffer reader, int index)
{
if (CanWrite())
{
return InternalKey(trans, index);
}
if (reader == null)
{
reader = PrepareRead(trans);
}
if (CanWrite())
{
return InternalKey(trans, index);
}
SeekKey(reader, index);
return KeyHandler().ReadIndexEntry(trans.Context(), reader);
}
private int CompareInReadMode(Transaction trans, IPreparedComparison preparedComparison
, ByteArrayBuffer reader, int index)
{
SeekKey(reader, index);
return -preparedComparison.CompareTo(KeyHandler().ReadIndexEntry(trans.Context(),
reader));
}
public override void WriteThis(Transaction trans, ByteArrayBuffer buffer)
{
int count = 0;
int startOffset = buffer._offset;
IContext context = trans.Context();
buffer.IncrementOffset(CountLeafAnd3LinkLength);
if (_isLeaf)
{
for (int i = 0; i < _count; i++)
{
object obj = InternalKey(trans, i);
if (obj != No4.Instance)
{
count++;
KeyHandler().WriteIndexEntry(context, buffer, obj);
}
}
}
else
{
for (int i = 0; i < _count; i++)
{
if (ChildCanSupplyFirstKey(i))
{
Db4objects.Db4o.Internal.Btree.BTreeNode child = (Db4objects.Db4o.Internal.Btree.BTreeNode
)_children[i];
object childKey = child.FirstKey(trans);
if (childKey != No4.Instance)
{
count++;
KeyHandler().WriteIndexEntry(context, buffer, childKey);
buffer.WriteIDOf(trans, child);
}
}
else
{
count++;
KeyHandler().WriteIndexEntry(context, buffer, Key(i));
buffer.WriteIDOf(trans, _children[i]);
}
}
}
int endOffset = buffer._offset;
buffer._offset = startOffset;
buffer.WriteInt(count);
buffer.WriteByte(_isLeaf ? (byte)1 : (byte)0);
buffer.WriteInt(_parentID);
buffer.WriteInt(_previousID);
buffer.WriteInt(_nextID);
buffer._offset = endOffset;
}
public void TraverseValues(Transaction transaction, IVisitor4 userVisitor)
{
if (!Alive())
{
return;
}
AssertHasIndex();
ObjectContainerBase stream = transaction.Container();
if (stream.IsClient)
{
Exceptions4.ThrowRuntimeException(Db4objects.Db4o.Internal.Messages.ClientServerUnsupported
);
}
lock (stream.Lock())
{
IContext context = transaction.Context();
_index.TraverseKeys(transaction, new _IVisitor4_866(this, userVisitor, context));
}
}
