//<--------------------------------Retrieves DBElement from database.
XElement get_value <Key, Data>(XElement request_msg, DBEngine <Key, DBElement <Key, Data> > db)
{
Console.Write("\n Request to Query for DB Element ");
try
{
Key k = (Key)Convert.ChangeType(request_msg.Element("Key").Value, typeof(Key));
Console.WriteLine(" with key - {0}", k);
DBElement <Key, Data> elem = new DBElement <Key, Data>();
elem = sendQuery.findValue <Key, DBElement <Key, Data>, Data>(db, k);
if (elem == null)
{
XElement response_msg = new XElement("Query_Response");
XElement type = new XElement("Query_Type", "Get Value");
string rst = "Could not find element with key - " + k.ToString() + " in database.";
XElement result = new XElement("Result", rst);
response_msg.Add(type);
response_msg.Add(result);
return(response_msg);
}
else
{
XElement response_msg = new XElement("Query_Response");
XElement type = new XElement("Query_Type", "Get Value");
XElement result = new XElement("Result", "Success");
string payload = " Payload of DBElement with key - " + k.ToString() + " = " + elem.payload;
XElement par = new XElement("Partial", payload);
XElement com = new XElement("Complete");
string nam = " Name: " + elem.name + "\n";
XElement name = new XElement("Name", nam);
string desc = " Description: " + elem.descr + "\n";
XElement descr = new XElement("Description", desc);
string tm_stmp = " TimeStamp: " + elem.timeStamp.ToString() + "\n";
XElement time = new XElement("Time", tm_stmp);
com.Add(name);
com.Add(descr);
com.Add(time);
response_msg.Add(type);
response_msg.Add(result);
response_msg.Add(par);
response_msg.Add(com);
return(response_msg);
}
}
catch (Exception)
{
Console.WriteLine("\n XML file for request message is not in the expected format. A particular tag could not be found.");
XElement response_msg = new XElement("Result", "Could not insert element into database");
return(request_msg);
}
}
static void Main(string[] args)
{
"Testing QueryEngine Package".title('=');
WriteLine();
QueryEngine sendQuery = new QueryEngine();
DBElement <int, string> elem1 = new DBElement <int, string>("Element-1", "Description of Element-1");
elem1.payload = "Payload of element-1.";
elem1.children.AddRange(new List <int> {
9, 10, 11, 79
});
DBElement <int, string> elem2 = new DBElement <int, string>("Element-2", "Description of Element-2");
elem2.payload = "Payload of element-2.";
DBElement <int, string> elem3 = new DBElement <int, string>("Element-3", "Description of Element-3");
elem3.payload = "Payload of element-3.";
DBEngine <int, DBElement <int, string> > db = new DBEngine <int, DBElement <int, string> >();
db.insert(1, elem1);
db.insert(2, elem2);
db.insert(3, elem3);
db.showDB();
DBElement <int, string> result_elem = new DBElement <int, string>();
DBElement <int, string> result_elem2 = new DBElement <int, string>();
//DBElement<int, string> result_elem = new DBElement<int, string>();
Write("\n\n Send query -> Find element with key = 2");
result_elem = sendQuery.findValue <int, DBElement <int, string>, string>(db, 2);
if (result_elem == null)
{
WriteLine("\n Element with Key= 2 was not found in the database.");
}
else
{
result_elem.showElement();
}
Write("\n\n Send query -> Find element with key = 5");
result_elem = sendQuery.findValue <int, DBElement <int, string>, string>(db, 5);
if (result_elem == null)
{
WriteLine("\n Element with Key= 5 was not found in the database.");
}
else
{
result_elem.showElement();
}
Write("\n Send query -> Get children of element with key = 1");
List <int> x1 = sendQuery.getChildren <int, DBElement <int, string>, string>(db, 1);
Write("\n Children of element with key=1 are ");
foreach (int i in x1)
{
Write("{0} ", i);
}
Write("\n\n Send query -> Get children of element with key = 3");
List <int> y1 = sendQuery.getChildren <int, DBElement <int, string>, string>(db, 3);
if (y1.Count() > 0)
{
Write("\n Children of element with key=3 are ");
foreach (int i in y1)
{
Write("{0} ", i);
}
}
else
{
WriteLine("\n Element with key=3 has no children.");
}
WriteLine("\n Send query -> Get keys with string -\"blah\" in metadata section.");
List <int> m1 = sendQuery.get_keys_with_metadata <int, DBElement <int, string>, string>(db, "18779");
if (m1.Count() > 0)
{
Write(" Keys that contain the string \"ent-2\" in their metadata section are: ");
foreach (int i in m1)
{
Write("{0} ", i);
}
}
else
{
WriteLine(" No keys found having \"ent-2\" in their metadata section.");
}
//WriteLine("Type of x = {0}", x.ToString());
//----< Test query methods for DBEngine<string, DBElement<string, List<string>>> >----------
Write("\n\n --- Test Query methods for DBEngine<string, DBElement<string,List<string>>> ---");
DBElement <string, List <string> > new_elem1 = new DBElement <string, List <string> >("Element-One", "Description of Element-One");
new_elem1.payload = new List <string> {
"First string in payload of Element-One", "Second string in payload of Element-One", "Third string"
};
new_elem1.children.AddRange(new List <string> {
"Nine", "Ten", "Eleven"
});
System.Threading.Thread.Sleep(1200);
DateTime tm1 = DateTime.Now;
System.Threading.Thread.Sleep(1200);
DBElement <string, List <string> > new_elem2 = new DBElement <string, List <string> >("Element-Two", "Description of Element-Two");
new_elem2.payload = new List <string> {
"First string in payload of Element-Two", "Mars", "Venus"
};
System.Threading.Thread.Sleep(1200);
DBElement <string, List <string> > new_elem3 = new DBElement <string, List <string> >("Element-Three", "Description of Element-Three");
new_elem3.payload = new List <string> {
"First string in payload of element-3", "Beta", "Gamma"
};
DBEngine <string, DBElement <string, List <string> > > new_db = new DBEngine <string, DBElement <string, List <string> > >();
new_db.insert("One", new_elem1);
new_db.insert("Two", new_elem2);
new_db.insert("Three", new_elem3);
DateTime tm2 = DateTime.Now;
new_db.showEnumerableDB();
Write("\n\n Send query -> Find element with key = One");
if (sendQuery.findValue <string, DBElement <string, List <string> >, List <string> >(new_db, "One") == null)
{
WriteLine("\n Element with Key= \"One\" was not found in the database.");
}
else
{
sendQuery.findValue <string, DBElement <string, List <string> >, List <string> >(new_db, "One").showEnumerableElement();
}
Write("\n\n Send query -> Find element with key = Five");
if (sendQuery.findValue <string, DBElement <string, List <string> >, List <string> >(new_db, "Five") == null)
{
WriteLine("\n Element with Key= \"Five\" was not found in the database.");
}
else
{
sendQuery.findValue <string, DBElement <string, List <string> >, List <string> >(new_db, "Five").showEnumerableElement();
}
Write("\n Send query -> Get children of element with key = \"One\"");
//List<int> x = sendQuery.getChildren<int, DBElement<int, string>, string>(db, 1);
List <string> x = sendQuery.getChildren <string, DBElement <string, List <string> >, List <string> >(new_db, "One");
if (x.Count() > 0)
{
Write("\n Children of element with key=\"One\" are ");
foreach (string i in x)
{
Write("{0} ", i);
}
}
else
{
WriteLine("\n Element with key=\"One\" has no children.");
}
Write("\n\n Send query -> Get children list of element with key = \"Three\"");
//List<int> x = sendQuery.getChildren<int, DBElement<int, string>, string>(db, 1);
List <string> y = sendQuery.getChildren <string, DBElement <string, List <string> >, List <string> >(new_db, "Three");
if (y.Count > 0)
{
Write("\n Children of element with key=\"Three\" are ");
foreach (string i in y)
{
Write("{0} ", i);
}
}
else
{
WriteLine("\n Element with key=\"Three\" has no children.");
}
List <string> search_pat = new List <string> {
"UnKnown", "lement"
};
foreach (string pattern_in_metadata in search_pat)
{
WriteLine("\n Send query -> Get all keys containing string - \"{0}\" in their metadata section.", pattern_in_metadata);
List <string> res1 = sendQuery.get_keys_with_metadata <string, DBElement <string, List <string> >, List <string> >(new_db, pattern_in_metadata);
if (res1.Count > 0)
{
Write(" Keys containing string \"{0}\" in their metadata section are: ", pattern_in_metadata);
foreach (string i in res1)
{
Write("{0} ", i);
}
}
else
{
WriteLine(" No keys found containing pattern \"{0}\" in their metadata section.", pattern_in_metadata);
}
}
WriteLine("\n\n Send query -> Get all keys written within time intervals \"{0}\" and \"{1}\"", tm1, tm2);
List <string> result1 = sendQuery.get_keys_within_timeInterval <string, DBElement <string, List <string> >, List <string> >(new_db, tm1);
if (result1.Count > 0)
{
Write(" Keys written within specified time intervals are: ");
//Write(" Keys are: ");
foreach (string i in result1)
{
Write("{0} ", i);
}
}
else
{
WriteLine(" No keys found written withing specified time interevals tm1 and tm2.");
}
//WriteLine("tm1 = {0}\ntm2 = {1}", tm1, tm2);
}
