static Universal()
{
if (instance == null)
{
instance = new Universal();
if (File.Exists("Uni"))
{
FileStream file = File.Open("Uni", FileMode.Open);
BinaryFormatter bf = new BinaryFormatter();
if (new FileInfo("Uni").Length == 0)
{
// empty
//console.lo
RowNode <Manager> newManagerNode = new RowNode <Manager>();
newManagerNode.info = new Manager();
instance.firstMng = newManagerNode;
instance.lastMng = instance.firstMng;
bf.Serialize(file, instance);
file.Close();
}
else
{
instance = bf.Deserialize(file) as Universal;
file.Close();
}
}
else
{
RowNode <Manager> newManagerNode = new RowNode <Manager>();
newManagerNode.info = new Manager();
instance.firstMng = newManagerNode;
instance.lastMng = instance.firstMng;
FileStream file = File.Create("Uni");
BinaryFormatter bf = new BinaryFormatter();
bf.Serialize(file, instance);
file.Close();
}
}
}
/**
* Initializes main file and BTrees.
*/
public Universal()
{
if (instance == null)
{
instance = this;
if (!File.Exists(dir + "mngFile"))
{
FileStream mngFile = File.Create(dir + "mngFile");
mngFile.Close();
}
if (File.Exists("mngTree"))
{
//Tree File exists.
FileStream mngTreeFile = File.Open("mngTree", FileMode.Open);
BinaryFormatter bf = new BinaryFormatter();
if (new FileInfo("mngTree").Length == 0)
{
//Tree File is empty.
BTree mngTree = new BTree();
Manager manager = new Manager();
mngTree.put(manager.id, 0);
instance.managerTree = mngTree;
bf.Serialize(mngTreeFile, mngTree);
FileManager.Add <Manager>(mngTree, new Manager(), manager.id, fileDirectoryPlusName: dir + "mngFile");
// FileStream newFile = File.Create("mng\\" + manager.id);
// BinaryFormatter newbf = new BinaryFormatter();
//bf.Serialize(newFile, manager);
// newFile.Close();
mngTreeFile.Close();
}
else
{
//Tree File was already created.
instance.managerTree = bf.Deserialize(mngTreeFile) as BTree;
mngTreeFile.Close();
}
}
else
{
//Tree File not exists
BTree mngTree = new BTree();
Manager manager = new Manager();
mngTree.put(manager.id, 0);
instance.managerTree = mngTree;
FileStream mngTreeFile = File.Create("mngTree");
BinaryFormatter bf = new BinaryFormatter();
bf.Serialize(mngTreeFile, mngTree);
FileManager.Add <Manager>(mngTree, new Manager(), manager.id, fileDirectoryPlusName: dir + "mngFile"); //FileStream newFile = File.Create("mng\\" + manager.id);
//BinaryFormatter newbf = new BinaryFormatter();
//bf.Serialize(newFile, manager);
//newFile.Close();
mngTreeFile.Close();
}
if (!File.Exists("mstFile"))
{
FileStream mstFile = File.Create("mstFile");
mstFile.Close();
}
if (File.Exists("mstTree"))
{
//Tree File exists.
FileStream mstTreeFile = File.Open("mstTree", FileMode.Open);
BinaryFormatter bf = new BinaryFormatter();
if (new FileInfo("mstTree").Length == 0)
{
//Tree File is empty.
BTree mstTree = new BTree();
instance.masterTree = mstTree;
bf.Serialize(mstTreeFile, mstTree);
mstTreeFile.Close();
}
else
{
//Tree File was already created.
instance.masterTree = bf.Deserialize(mstTreeFile) as BTree;
mstTreeFile.Close();
}
}
else
{
//Tree File not exists
BTree mstTree = new BTree();
instance.masterTree = mstTree;
FileStream mstFile = File.Create("mstTree");
BinaryFormatter bf = new BinaryFormatter();
bf.Serialize(mstFile, mstTree);
mstFile.Close();
}
if (!File.Exists("stdFile"))
{
FileStream stdFile = File.Create("stdFile");
stdFile.Close();
}
if (File.Exists("stdTree"))
{
//Tree File exists.
FileStream stdTreeFile = File.Open("stdTree", FileMode.Open);
BinaryFormatter bf = new BinaryFormatter();
if (new FileInfo("stdTree").Length == 0)
{
//Tree File is empty.
BTree stdTree = new BTree();
instance.studentTree = stdTree;
bf.Serialize(stdTreeFile, stdTree);
stdTreeFile.Close();
}
else
{
//Tree File was already created.
instance.studentTree = bf.Deserialize(stdTreeFile) as BTree;
stdTreeFile.Close();
}
}
else
{
//Tree File not exists
BTree stdTree = new BTree();
instance.studentTree = stdTree;
FileStream stdTreeFile = File.Create("stdTree");
BinaryFormatter bf = new BinaryFormatter();
bf.Serialize(stdTreeFile, stdTree);
stdTreeFile.Close();
}
if (!File.Exists("crsFile"))
{
FileStream crsFile = File.Create("crsFile");
crsFile.Close();
}
if (File.Exists("crsTree"))
{
//File exists.
FileStream crsFile = File.Open("crsTree", FileMode.Open);
BinaryFormatter bf = new BinaryFormatter();
if (new FileInfo("crsTree").Length == 0)
{
//File is empty.
BTree crsTree = new BTree();
instance.courseTree = crsTree;
bf.Serialize(crsFile, crsTree);
crsFile.Close();
}
else
{
//File was already created.
instance.courseTree = bf.Deserialize(crsFile) as BTree;
crsFile.Close();
}
}
else
{
//File not exists
BTree crsTree = new BTree();
instance.courseTree = crsTree;
FileStream crsTreeFile = File.Create("crsTree");
BinaryFormatter bf = new BinaryFormatter();
bf.Serialize(crsTreeFile, crsTree);
crsTreeFile.Close();
}
}
}