/*-------------------Get the chidren of a particular key-----------------*/
public List <Key> getChildrenOfKey(Key key)
{
try
{
if (db.Contains(key))
{
dynamic elem1 = db.getValueOfKey(key);
return(elem1.children);
}
else
{
WriteLine("\nKey is not present in the dictionary\n");
return(default(List <Key>));
}
}
catch (Exception e)
{
WriteLine("\n" + e.Message + "\n");
return(default(List <Key>));
}
}
/*-------------------Function to edit the name and description metadata---------------*/
public bool editMetaData(Key key, string name, string description)
{
try
{
if (db.Contains(key))
{
dynamic elem1 = db.getValueOfKey(key);
elem1.name = name;
elem1.descr = description;
return(true);
}
else
{
WriteLine("\nKey is not present in the dictionary\n");
return(false);
}
}
catch (Exception e)
{
WriteLine("\n" + e.Message + "\n");
return(false);
}
}
/*-----------------Function to persist the database contents to XML doc------------------*/
public void persistToXML(dynamic keys)
{
try
{
XDocument xmlDoc = new XDocument();
XElement database = new XElement("Database");
xmlDoc.Add(database);
XElement record = new XElement("Record");
database.Add(record);
foreach (var item in keys)
{
XElement key = new XElement("Key", item);
database.Add(key);
dynamic elem2 = db.getValueOfKey(item);
XElement value = new XElement("Value");
database.Add(value);
XElement name = new XElement("name", elem2.name);
value.Add(name);
XElement descr = new XElement("descr", elem2.descr);
value.Add(descr);
XElement timeStamp = new XElement("timeStamp", elem2.timeStamp);
value.Add(timeStamp);
XElement children = new XElement("children");
value.Add(children);
foreach (var c in elem2.children)
{
XElement child = new XElement("child", c);
children.Add(child);
}
XElement payload = new XElement("payload", elem2.payload);
value.Add(payload);
}
saveXML(xmlDoc);
}
catch (Exception e)
{
Console.WriteLine("\n" + e.Message + "\n");
}
}
void TestR7()
{
"\n1) Fetch Value for key 3".title();
var val = db.getValueOfKey(3);
val.showElement();
WriteLine();
qEngine = new QueryEngine <int, DBElement <int, string> >(db);
"\n2) Fetch the children of key 1".title();
var children = qEngine.getChildrenOfKey(1);
displayChildren(children);
"\n3) Fetch the keys which starts with r in the below database with key/value pairs".title(); //Taking new database with string keys
DBElement <string, List <string> > elem = new DBElement <string, List <string> >();
elem.name = "Christ college";
elem.descr = "College where the person studied";
elem.timeStamp = DateTime.Now;
elem.children.AddRange(new List <string> {
"rakesh"
});
elem.payload = new List <string> {
"One", "Two", "Three", "Four"
};
dbString.insert("saahith", elem);
DBElement <string, List <string> > elem1 = new DBElement <string, List <string> >();
elem1.name = "PESIT college";
elem1.descr = "College where the person pursued undergraduation";
elem1.timeStamp = DateTime.Now.AddDays(-2);
elem1.children.AddRange(new List <string> {
"saahith"
});
elem1.payload = new List <string> {
"Five", "Six", "Seven", "Eight"
};
dbString.insert("rakesh", elem1);
dbString.showEnumerableDB();
WriteLine();
qEngine2 = new QueryEngine <string, DBElement <string, List <string> > >(dbString);
string pattern1 = @"(^r)";
var spKeys = qEngine2.getListStringKeyPattern(pattern1);
displayStringKeys(spKeys);
"\n4) Fetch keys with metadata pattern 'Name'".title();
string pattern = "Name";
var mdKeys = qEngine.getListMetaDataPattern(pattern);
displayKeys(mdKeys);
"\n5) Fetch keys which are created between two dates 29th sept 2015 and 15th oct 2015".title();
DateTime time1 = new DateTime(2015, 9, 29);
DateTime time2 = new DateTime(2015, 10, 15);
var tpKeys = qEngine.getListTimePattern(time1, time2);
displayKeys(tpKeys);
}
static void Main(string[] args)
{
"Testing DBFactory Package".title('=');
WriteLine();
"\nCreation of immutable database".title();
WriteLine();
"\nOriginal database".title();
DBEngine <int, DBElement <int, string> > db = new DBEngine <int, DBElement <int, string> >();
DBElement <int, string> elem1 = new DBElement <int, string>();
elem1.name = "India";
elem1.descr = "Country";
elem1.timeStamp = DateTime.Now;
elem1.children.AddRange(new List <int> {
2, 3
});
elem1.payload = "Famous cricket player";
db.insert(1, elem1);
DBElement <int, string> elem2 = new DBElement <int, string>();
elem2.name = "Roger federer";
elem2.descr = "Tennis player";
elem2.timeStamp = DateTime.Now.AddDays(-15);
elem2.children.AddRange(new List <int> {
3
});
elem2.payload = "Famous tennis player";
db.insert(2, elem2);
DBElement <int, string> elem3 = new DBElement <int, string>();
elem3.name = "Usain Bolt";
elem3.descr = "Athelte";
elem3.timeStamp = DateTime.Now;
elem3.children.AddRange(new List <int> {
1
});
elem3.payload = "Fastest in the world";
db.insert(3, elem3);
DBElement <int, string> elem4 = new DBElement <int, string>();
elem4.name = "Saina Nehwal";
elem4.descr = "Badminton Player";
elem4.timeStamp = DateTime.Now;
elem4.children.AddRange(new List <int> {
2
});
elem4.payload = "Famous badminton player";
db.insert(4, elem4);
db.showDB();
WriteLine();
"\n Fetch all the keys which are even from the above database".title();
try
{
QueryEngine <int, DBElement <int, string> > qEngine = new QueryEngine <int, DBElement <int, string> >(db);
Dictionary <int, DBElement <int, string> > dictFactory = new Dictionary <int, DBElement <int, string> >();
DBFactory <int, DBElement <int, string> > dbFactory;
var keys = qEngine.getListKeyPattern();
if (keys != null)
{
foreach (var key in keys)
{
var val = db.getValueOfKey(key);
dictFactory.Add(key, val); //add keys and values to the dictionary
}
dbFactory = new DBFactory <int, DBElement <int, string> >(dictFactory); //store the dictionary in the
WriteLine("\nThe below key/value pairs with even keys pattern are saved as an immutable database\n");
dbFactory.showDB(); //display the immutable database
WriteLine();
WriteLine();
}
else
{
WriteLine("\nNo keys are obtained from a query for creation of immutable database\n");
}
WriteLine();
WriteLine();
}
catch (Exception e)
{
Console.WriteLine("\n" + e.Message + "\n");
}
}
static void Main(string[] args)
{
"Testing ItemEditor Package".title('=');
Console.WriteLine();
DBEngine <int, DBElement <int, string> > db = new DBEngine <int, DBElement <int, string> >();
DBElement <int, string> elem1 = new DBElement <int, string>();
elem1.name = "India";
elem1.descr = "Country";
elem1.timeStamp = DateTime.Now;
elem1.children.AddRange(new List <int> {
2, 3
});
elem1.payload = "Famous cricket player";
db.insert(1, elem1);
DBElement <int, string> elem2 = new DBElement <int, string>(); //Add new key/value pairs to the database
elem2.name = "Roger federer";
elem2.descr = "Tennis player";
elem2.timeStamp = DateTime.Now.AddDays(-15);
elem2.children.AddRange(new List <int> {
3
});
elem2.payload = "Famous tennis player";
db.insert(2, elem2);
DBElement <int, string> elem3 = new DBElement <int, string>();
elem3.name = "Usain Bolt";
elem3.descr = "Athelte";
elem3.timeStamp = DateTime.Now;
elem3.children.AddRange(new List <int> {
1
});
elem3.payload = "Fastest in the world";
db.insert(3, elem3);
Console.WriteLine();
db.showDB();
"\n1) Fetch Value for key 3".title();
var val = db.getValueOfKey(3);
val.showElement();
Console.WriteLine();
QueryEngine <int, DBElement <int, string> > qEngine = new QueryEngine <int, DBElement <int, string> >(db);
"\n2) Fetch the children of key 1".title();
var children = qEngine.getChildrenOfKey(1);
displayChildren(children);
DBEngine <string, DBElement <string, List <string> > > db2 = new DBEngine <string, DBElement <string, List <string> > >();
"\n 3) Fetch the keys which starts with r in the below database with key/value pairs".title(); //Taking new database with string keys
DBElement <string, List <string> > elem4 = new DBElement <string, List <string> >();
elem4.name = "Christ college";
elem4.descr = "College where the person studied";
elem4.timeStamp = DateTime.Now;
elem4.children.AddRange(new List <string> {
"rakesh"
});
elem4.payload = new List <string> {
"One", "Two", "Three", "Four"
};
db2.insert("saahith", elem4);
DBElement <string, List <string> > elem5 = new DBElement <string, List <string> >();
elem5.name = "PESIT college";
elem5.descr = "College where the person pursued undergraduation";
elem5.timeStamp = DateTime.Now.AddDays(-2);
elem5.children.AddRange(new List <string> {
"saahith"
});
elem5.payload = new List <string> {
"Five", "Six", "Seven", "Eight"
};
db2.insert("rakesh", elem5);
db2.showEnumerableDB();
WriteLine();
QueryEngine <string, DBElement <string, List <string> > > qEngine2 = new QueryEngine <string, DBElement <string, List <string> > >(db2);
string pattern1 = @"(^r)";
var spKeys = qEngine2.getListStringKeyPattern(pattern1);
displayStringKeys(spKeys);
"\n4) Fetch keys with metadata pattern 'Country'".title();
string pattern = "Country";
var mdKeys = qEngine.getListMetaDataPattern(pattern);
displayKeys(mdKeys);
"\n5) Fetch keys which are created between two dates 29th sept 2015 and 15th oct 2015".title();
DateTime time1 = new DateTime(2015, 9, 29);
DateTime time2 = new DateTime(2015, 10, 15);
var tpKeys = qEngine.getListTimePattern(time1, time2);
displayKeys(tpKeys);
}
