static void insertToBox(IBox box, KeyWord kw, bool isRemove)
{
Binder binder;
if (kw is KeyWordE)
{
binder = box["/E", kw.getKeyWord(), kw.getID(), kw.getPosition()];
}
else
{
binder = box["/N", kw.getKeyWord(), kw.getID(), kw.getPosition()];
}
if (isRemove)
{
binder.Delete();
}
else
{
if (binder.TableName == "/E")
{
binder.Insert((KeyWordE)kw);
}
else
{
binder.Insert((KeyWordN)kw);
}
}
}
private static IEnumerable <KeyWord> lessMatch(IBox box, KeyWord kw)
{
if (kw is KeyWordE)
{
return(box.Select <KeyWordE>("from /E where K<=? limit 0, 50", kw.getKeyWord()));
}
else
{
return(box.Select <KeyWordN>("from /N where K<=? limit 0, 50", kw.getKeyWord()));
}
}
private static IEnumerable <KeyWord> search(IBox box,
KeyWord kw, KeyWord con, MaxID maxId)
{
String ql = kw is KeyWordE
? "from /E where K==? & I<=?"
: "from /N where K==? & I<=?";
int linkPos = kw.isLinked ? (con.getPosition() + con.size()
+ (kw is KeyWordE ? 1 : 0)) : -1;
long currentMaxId = long.MaxValue;
KeyWord cache = null;
IEnumerator <KeyWord> iter = null;
bool isLinkEndMet = false;
return(new Iterable <KeyWord>()
{
iterator = new EngineIterator <KeyWord>()
{
hasNext = () =>
{
if (maxId.id == -1)
{
return false;
}
if (currentMaxId > (maxId.id + 1))
{
currentMaxId = maxId.id;
iter = kw is KeyWordE ?
(IEnumerator <KeyWord>)box.Select <KeyWordE>(ql, kw.getKeyWord(), maxId.id).GetEnumerator() :
box.Select <KeyWordN>(ql, kw.getKeyWord(), maxId.id).GetEnumerator();
}
while (iter.MoveNext())
{
cache = iter.Current;
maxId.id = cache.getID();
currentMaxId = maxId.id;
if (con != null && con.I != maxId.id)
{
return false;
}
if (isLinkEndMet)
{
continue;
}
if (linkPos == -1)
{
return true;
}
int cpos = cache.getPosition();
if (cpos > linkPos)
{
continue;
}
if (cpos == linkPos)
{
if (kw.isLinkedEnd)
{
isLinkEndMet = true;
}
return true;
}
return false;
}
maxId.id = -1;
return false;
},
next = () =>
{
return cache;
}
}
});
}
