public BTree(Transaction trans, BTreeConfiguration config, int id, IIndexable4 keyHandler
, int treeNodeSize) : base(config._idSystem)
{
_config = config;
if (null == keyHandler)
{
throw new ArgumentNullException();
}
_nodeSize = treeNodeSize;
_nodeCache = CacheFactory.NewLRUIntCache(config._cacheSize);
_halfNodeSize = _nodeSize / 2;
_nodeSize = _halfNodeSize * 2;
_keyHandler = keyHandler;
SetID(id);
if (IsNew())
{
SetStateDirty();
_root = new BTreeNode(this, 0, true, 0, 0, 0);
_root.Write(trans.SystemTransaction());
AddNode(_root);
Write(trans.SystemTransaction());
}
else
{
SetStateDeactivated();
}
}
public BTree(Transaction trans, BTreeConfiguration config, int id, IIndexable4 keyHandler
, int treeNodeSize) : base(config._idSystem)
{
_config = config;
if (null == keyHandler)
{
throw new ArgumentNullException();
}
_nodeSize = treeNodeSize;
_nodeCache = CacheFactory.NewLRUIntCache(config._cacheSize);
_halfNodeSize = _nodeSize / 2;
_nodeSize = _halfNodeSize * 2;
_keyHandler = keyHandler;
SetID(id);
if (IsNew())
{
SetStateDirty();
_root = new BTreeNode(this, 0, true, 0, 0, 0);
_root.Write(trans.SystemTransaction());
AddNode(_root);
Write(trans.SystemTransaction());
}
else
{
SetStateDeactivated();
}
}
protected BTree NewBTree(Transaction systemTrans, int id)
{
ObjectContainerBase stream = systemTrans.Container();
IIndexable4 indexHandler = IndexHandler(stream);
if (indexHandler == null)
{
return(null);
}
return(new BTree(systemTrans, id, new FieldIndexKeyHandler(indexHandler)));
}
private BTreePointer FirstBTreePointer()
{
// We don't want nulls included so we have to search for null and use the resulting pointer if we find one.
IIndexable4 keyHandler = Btree().KeyHandler();
if (keyHandler is ICanExcludeNullInQueries)
{
ICanExcludeNullInQueries canExcludeNullInQueries = (ICanExcludeNullInQueries)keyHandler;
if (canExcludeNullInQueries.ExcludeNull())
{
BTreeNodeSearchResult searchLeaf = Btree().SearchLeafByObject(Transaction(), null
, SearchTarget.Highest);
BTreePointer pointer = searchLeaf.FirstValidPointer();
if (pointer != null)
{
return(pointer);
}
}
}
return(Btree().FirstPointer(Transaction()));
}
public static void DefragIndex(DefragmentContextImpl context, IIndexable4 keyHandler
)
{
// count
int count = context.ReadInt();
// leafByte
byte leafByte = context.ReadByte();
bool isLeaf = (leafByte == 1);
context.CopyID();
// parent ID
context.CopyID();
// previous ID
context.CopyID();
// next ID
for (int i = 0; i < count; i++)
{
keyHandler.DefragIndexEntry(context);
if (!isLeaf)
{
context.CopyID();
}
}
}
public FieldIndexKeyHandler(IIndexable4 delegate_)
{
_parentIdHandler = new IDHandler();
_valueHandler = delegate_;
}
public FieldIndexKeyHandler(IIndexable4 delegate_)
{
_parentIdHandler = new IDHandler();
_valueHandler = delegate_;
}
public BTree(Transaction trans, int id, IIndexable4 keyHandler, int nodeSize) : this
(trans, BTreeConfiguration.Default, id, keyHandler, nodeSize)
{
}
public BTree(Transaction trans, BTreeConfiguration config, int id, IIndexable4 keyHandler
) : this(trans, config, id, keyHandler, Config(trans).BTreeNodeSize())
{
}
public BTree(Transaction trans, BTreeConfiguration config, IIndexable4 keyHandler
) : this(trans, config, 0, keyHandler)
{
}
public static void DefragIndex(DefragmentContextImpl context, IIndexable4 keyHandler
)
{
// count
int count = context.ReadInt();
// leafByte
byte leafByte = context.ReadByte();
bool isLeaf = (leafByte == 1);
context.CopyID();
// parent ID
context.CopyID();
// previous ID
context.CopyID();
// next ID
for (int i = 0; i < count; i++)
{
keyHandler.DefragIndexEntry(context);
if (!isLeaf)
{
context.CopyID();
}
}
}
/// <exception cref="System.Exception"></exception>
protected override void Db4oSetupBeforeStore()
{
_handler = new DoubleHandler();
}
/// <exception cref="System.Exception"></exception>
protected override void Db4oSetupBeforeStore()
{
_handler = new DoubleHandler();
}
public BTree(Transaction trans, BTreeConfiguration config, IIndexable4 keyHandler
) : this(trans, config, 0, keyHandler)
{
}
public BTree(Transaction trans, int id, IIndexable4 keyHandler, int nodeSize) : this
(trans, BTreeConfiguration.Default, id, keyHandler, nodeSize)
{
}
public BTree(Transaction trans, BTreeConfiguration config, int id, IIndexable4 keyHandler
) : this(trans, config, id, keyHandler, Config(trans).BTreeNodeSize())
{
}
