internal void OpenWrite()
{
lock (Sync)
{
if (this.writeOpened)
{
Console.WriteLine("DataSeries::OpenWrite already write open");
return;
}
this.cache = this.cache ?? ReadCache();
if (this.bufferCount != 0 && this.cache[this.bufferCount - 1] != null)
{
this.writeKey = this.cache[this.bufferCount - 1];
this.writeKey.GetObjects();
}
else
{
if (this.position2 != -1)
{
this.writeKey = ReadKey(this.position2);
this.writeKey.number = this.bufferCount - 1;
this.writeKey.GetObjects();
}
else
{
this.writeKey = new DataKey(this.file)
{
number = 0,
changed = true
};
this.bufferCount = 1;
}
this.cache[this.writeKey.number] = this.writeKey;
}
if (this.cacheKey.position != -1)
{
this.file.DeleteKey(this.cacheKey, false, false);
}
this.cachePosition = -1;
this.file.WriteKey(this.key);
this.writeOpened = true;
}
}
private void InsertKey(DataKey key, DataKey keyAt)
{
for (int i = this.bufferCount; i > keyAt.number + 1; i--)
{
this.cache[i] = this.cache[i - 1];
if (this.cache[i] != null)
{
this.cache[i].number = i;
}
}
this.bufferCount++;
key.number = keyAt.number + 1;
this.cache[key.number] = key;
key.prev = keyAt.position;
key.next = keyAt.next;
WriteKey(key);
this.file.WriteKey(this.key);
}
public static object FromReader(BinaryReader reader, byte version)
{
int size = reader.ReadInt32();
var keys = new IdArray <DataKey>(size);
while (true)
{
int index = reader.ReadInt32();
if (index == -1)
{
break;
}
var key = new DataKey(null, null, -1, -1);
key.Read(reader, true);
keys.Add(index, key);
}
return(new DataKeyIdArray(keys));
}
internal ObjectKey ReadKey(long position)
{
lock (Sync)
{
var buffer = new byte[ObjectKey.HEADER_SIZE];
ReadBuffer(buffer, position, buffer.Length);
ObjectKey key;
string text;
using (var ms = new MemoryStream(buffer))
{
using (var rdr = new BinaryReader(ms))
{
text = rdr.ReadString();
key = new ObjectKey(this, null, null)
{
Label = text
};
key.ReadHeader(rdr);
}
}
buffer = new byte[key.keyLength];
ReadBuffer(buffer, position, buffer.Length);
if (text.StartsWith("OK"))
{
key = new ObjectKey(this, null, null);
}
else
{
if (!text.StartsWith("DK"))
{
Console.WriteLine($"DataFile::ReadKey This is not object or data key : {text}");
return(null);
}
key = new DataKey(this, null, -1, -1);
}
using (var ms = new MemoryStream(buffer))
using (var rdr = new BinaryReader(ms))
key.Read(rdr, true);
return(key);
}
}
public virtual long GetIndex(DateTime dateTime, SearchOption option = SearchOption.Prev)
{
lock (Sync)
{
if (!this.readOpened)
{
OpenRead();
}
if (Count == 0)
{
Console.WriteLine($"DataSeries::GetIndex Error, data series has no elements {Name}");
return(-1);
}
if (dateTime <= DateTime1)
{
return(0);
}
if (dateTime >= DateTime2)
{
return(Count - 1);
}
var key = GetKey(dateTime, this.readKey, IndexOption.Null);
if (key == null)
{
return(-1);
}
if (key != this.readKey)
{
if (!CacheObjects && this.readKey != null && this.readKey != this.writeKey &&
this.readKey != this.insertKey && this.readKey != this.deleteKey)
{
this.readKey.objects = null;
}
this.readKey = key;
}
return(this.readKey.index1 + this.readKey.GetIndex(dateTime, option));
}
}
public virtual DataObject Get(DateTime dateTime)
{
lock (Sync)
{
if (!this.readOpened)
{
OpenRead();
}
if (Count == 0 || dateTime > DateTime2)
{
Console.WriteLine($"DataSeries::Get dateTime is out of range : {Name} {dateTime}");
return(null);
}
if (dateTime <= DateTime1)
{
return(Get(0));
}
var key = GetKey(dateTime, this.readKey, IndexOption.Null);
if (key == null)
{
return(null);
}
if (key != this.readKey)
{
if (!CacheObjects && this.readKey != null && this.readKey != this.writeKey && this.readKey != this.insertKey && this.readKey != this.deleteKey)
{
this.readKey.objects = null;
}
this.readKey = key;
}
return(this.readKey.GetObject(dateTime));
}
}
// TODO: rewrite it!
internal DataKey GetKey(long index, DataKey key = null)
{
lock (Sync)
{
if (0 <= index && index < Count)
{
if (key == null)
{
key = this.readKey;
}
DataKey @class = null;
if (key != null)
{
if (key.index1 <= index && index <= key.index2)
{
return(key);
}
if (index > key.index2)
{
@class = GetNextKey(key);
}
}
if (@class == null)
{
@class = GetFirstKey();
}
while (index < @class.index1 || index > @class.index2)
{
@class = GetNextKey(@class);
}
return(@class);
}
Console.WriteLine($"DataSeries::GetKey Error: index is out of range : {Name} {index}");
return(null);
}
}
public void Clear()
{
lock (Sync)
{
this.cache = this.cache ?? ReadCache();
if (this.position1 != -1)
{
var key = ReadKey(this.position1);
while (true)
{
this.file.DeleteKey(key, false, true);
if (key.next == -1)
{
break;
}
key = ReadKey(key.next);
}
}
Count = 0;
this.bufferCount = 0;
DateTime1 = new DateTime(0);
DateTime2 = new DateTime(0);
this.position1 = -1;
this.position2 = -1;
this.readOpened = false;
this.writeOpened = false;
this.cache = new IdArray <DataKey>(4096);
this.cacheKey.obj = new DataKeyIdArray(this.cache);
this.readKey = null;
this.writeKey = null;
this.deleteKey = null;
this.insertKey = null;
this.changed = true;
Flush();
}
}
private void SetNext(DataKey key, long position)
{
key.next = position;
SetNext(key.position, position);
}
private void SetPrev(DataKey key, long position)
{
key.prev = position;
SetPrev(key.position, position);
}
private void Insert(DataObject obj)
{
Count++;
if (this.writeKey.dateTime1 <= obj.DateTime && obj.DateTime <= this.writeKey.dateTime2)
{
this.writeKey.AddObject(obj);
if (this.writeKey.count >= this.writeKey.size)
{
WriteKey(this.writeKey);
this.writeKey = new DataKey(this.file, null, this.writeKey.position, -1L)
{
number = this.bufferCount,
index1 = Count,
index2 = Count,
changed = true
};
this.bufferCount++;
this.cache[this.writeKey.number] = this.writeKey;
}
else
{
this.changed = true;
}
this.file.isModified = true;
return;
}
var key = GetKey(obj.DateTime, this.insertKey, IndexOption.Prev);
if (this.insertKey == null)
{
this.insertKey = key;
}
else if (this.insertKey != key)
{
if (this.insertKey.changed)
{
WriteKey(this.insertKey);
}
if (!CacheObjects && this.insertKey != this.readKey && this.insertKey != this.writeKey && this.insertKey != this.deleteKey)
{
this.insertKey.objects = null;
}
this.insertKey = key;
}
this.insertKey.GetObjects();
if (this.insertKey.count < this.insertKey.size)
{
this.insertKey.AddObject(obj);
if (this.insertKey.count == this.insertKey.size)
{
WriteKey(this.insertKey);
}
}
else
{
key = new DataKey(this.file, null, -1L, -1L);
int num = this.insertKey.GetIndex(obj.DateTime, SearchOption.Next);
if (num == -1)
{
key.AddObject(obj);
}
else
{
for (int i = num; i < this.insertKey.count; i++)
{
key.AddObject(this.insertKey.objects[i]);
this.insertKey.objects[i] = null;
}
this.insertKey.count = num;
this.insertKey.index2 = this.insertKey.index1 + this.insertKey.count - 1;
if (this.insertKey.count != 0)
{
this.insertKey.dateTime2 = this.insertKey.objects[this.insertKey.count - 1].DateTime;
}
this.insertKey.AddObject(obj);
}
InsertKey(key, this.insertKey);
}
if (this.readKey != null && this.readKey.number > this.insertKey.number)
{
this.readKey.index1 += 1;
this.readKey.index2 += 1;
}
if (this.writeKey != null && this.writeKey.number > this.insertKey.number)
{
this.writeKey.index1 += 1;
this.writeKey.index2 += 1;
}
if (this.deleteKey != null && this.deleteKey.number > this.insertKey.number)
{
this.deleteKey.index1 += 1;
this.deleteKey.index2 += 1;
}
this.insertKey.changed = true;
this.changed = true;
this.file.isModified = true;
}
public void Remove(long index)
{
lock (Sync)
{
if (!this.writeOpened)
{
OpenWrite();
}
var key = GetKey(index, this.deleteKey);
if (key == null)
{
return;
}
if (this.deleteKey == null)
{
this.deleteKey = key;
}
else if (this.deleteKey != key)
{
if (this.deleteKey.changed)
{
WriteKey(this.deleteKey);
}
if (!CacheObjects && this.deleteKey != this.readKey && this.deleteKey != this.writeKey && this.deleteKey != this.insertKey)
{
this.deleteKey.objects = null;
}
this.deleteKey = key;
}
key.RemoveObject(index - key.index1);
key.index2 -= 1;
if (this.readKey != null && this.readKey.number > key.number)
{
this.readKey.index1 -= 1;
this.readKey.index2 -= 1;
}
if (this.writeKey != null && this.writeKey.number > key.number)
{
this.writeKey.index1 -= 1;
this.writeKey.index2 -= 1;
}
if (this.insertKey != null && this.insertKey.number > key.number)
{
this.insertKey.index1 -= 1;
this.insertKey.index2 -= 1;
}
if (key.count == 0)
{
DeleteKey(key);
this.deleteKey = null;
}
Count--;
if (Count != 0)
{
if (index == 0)
{
DateTime1 = Get(0).DateTime;
}
if (index == Count)
{
DateTime2 = Get(Count - 1).DateTime;
}
}
this.changed = true;
this.file.isModified = true;
}
}
