public void XMLWrite(DBEngine<int, DBElement<int, string>> db, out string pathname)
{
pathname = "xmlDoc.xml";
// The root element is nosqldb or nosqldbLOS, which we can say, is the name
// of the database of the corresponding type. The declaration is important
// from an XML parser point of view.
DBElement<int, string> Val = new DBElement<int, string>();
XDocument doc = new XDocument(new XElement("nosqldb"));
doc.Declaration = new XDeclaration("1.0", "utf - 8", "yes");
XElement keyType = new XElement("keytype", "int");
XElement payloadType = new XElement("payloadtype", "string");
doc.Root.Add(keyType);
doc.Root.Add(payloadType);
foreach (var key in db.Keys())
{
XElement keyNode = new XElement("key", key);
db.getValue(key, out Val);
XElement elementNode = new XElement("element");
elementNode.Add(new XElement("name", Val.name));
elementNode.Add(new XElement("descr", Val.descr));
elementNode.Add(new XElement("timeStamp", Val.timeStamp.ToString()));
XElement childrenNode = new XElement("children"); //since children is List<Key>
foreach (var item in Val.children)
{
childrenNode.Add(new XElement("key", item));
}
elementNode.Add(childrenNode);
elementNode.Add(new XElement("payload", Val.payload)); //since payload is string for this type of database
doc.Root.Add(keyNode);
doc.Root.Add(elementNode);
}
doc.Save(pathname);
}
/* Defining a query using lambda function to search specific key
*/
public void key_value_search(DBEngine<int, DBElement<int, string>> db, IQuery<int, DBElement<int, string>> i_query, QueryEngine<int, DBElement<int, string>> qe )
{
"Query for value with specified key (key = 2):".title();
WriteLine();
int key_to_search = 2;
Func<int, string, bool> keyValueSearch = (int key, string search) => //lambda function
{
if (!db.Keys().Contains(key))
return false;
else
{
if (key == int.Parse(search))
{
DBElement<int, string> ele = new DBElement<int, string>();
db.getValue(key, out ele);
return true;
}
else { return false; }
}
};
// pass query to query engine and call simpleQuery to make query on DBEngine
qe.simpleQuery(keyValueSearch, key_to_search.ToString(), out i_query);
WriteLine();
foreach (var key in i_query.Keys())
{
DBElement<int, string> temp = new DBElement<int, string>();
i_query.getValue(key, out temp);
WriteLine("key : {0}", key);
temp.showElement();
WriteLine();
}
}
//---------< Call QueryEngine based on the query type >-----------
public bool call(DBEngine <string, DBElement <string, List <string> > > db, string request)
{
if (db.Keys() == null)
{
return(false);
}
switch (request)
{
case "value":
if (qe.getValue(query, db, out elem))
{
return(true);
}
break;
case "children":
if (qe.getChildren(query, db, out replyList))
{
return(true);
}
break;
case "pattern":
if (qe.searchPattern(query, db, out replyList))
{
return(true);
}
break;
case "string":
if (qe.searchString(query, db, out replyList))
{
return(true);
}
break;
case "interval":
if (qe.searchInterval(query, "", db, out replyList))
{
return(true);
}
break;
default: return(false);
}
return(false);
}
static void Main(string[] args)
{
"Testing PersistEngine Package".title('=');
WriteLine();
DBEngine<int, DBElement<int, string>> db = new DBEngine<int, DBElement<int, string>>();
"\nSave to an XML file".title();
PersistEngineTest p1 = new PersistEngineTest();
p1.insertData(db);
dynamic allKeys = db.Keys();
PersistEngine<int,DBElement<int,string>> pEngine = new PersistEngine<int, DBElement<int, string>>(db);
pEngine.persistToXML(allKeys);
WriteLine("\n\nAbove database is stored as XML file in local machine");
WriteLine();
WriteLine("\nThe persisted XML file along with new key/value pairs are augmented to the database.\n");
WriteLine("Below shown key/value pairs are augmented to the database.\n");
pEngine.augmentDatabaseFromXML(db); //Augment the persisted database along with new values to the main database
pEngine.persistToXML(allKeys);
db.showDB();
WriteLine();
WriteLine();
"\nPersist database every 5 seconds until its cancelled".title();
WriteLine();
pEngine.scheduledSaveDatabase();
WriteLine();
WriteLine();
"\nProject dependancy and realtionships".title();
WriteLine();
DBEngine<string, DBElement<string, List<string>>> dependancyDb = new DBEngine<string, DBElement<string, List<string>>>();
PersistEngine<string, DBElement<string, List<string>>> pEngineString = new PersistEngine<string, DBElement<string, List<string>>>(dependancyDb);
try
{
Console.WriteLine("\nBelow details provide information on dependancy of every package in the project\n");
pEngine.displayDependancy();
dependancyDb.showEnumerableDB();
WriteLine();
}
catch (Exception e)
{
WriteLine("\n" + e.Message + "\n");
}
}
/* Defining a query using lambda function to search specific key
*/
public bool key_value_search(DBEngine<string, DBElement<string, List<string>>> db, out IQuery<string, DBElement<string, List<string>>> i_query, QueryEngine<string, DBElement<string, List<string>>> qe, string key_to_search = "12345")
{
"Query for value with specified key (key = element2):".title();
WriteLine();
Func<string, string, bool> keyValueSearch = (string key, string search) => //lambda function
{
if (!db.Keys().Contains(key))
return false;
else
{
if (key == (search))
{
DBElement<string, List<string>> ele = new DBElement<string, List<string>>();
db.getValue(key, out ele);
return true;
}
else { return false; }
}
};
// pass query to query engine and call simpleQuery to make query on DBEngine
if (qe.simpleQuery(keyValueSearch, key_to_search.ToString(), out i_query))
{
WriteLine();
foreach (var key in i_query.Keys())
{
DBElement<string, List<string>> temp = new DBElement<string, List<string>>();
i_query.getValue(key, out temp);
WriteLine("key : {0}", key);
temp.showEnumerableElement();
WriteLine();
}
return true;
}
else
{
return false;
}
}
/* Defining a query using lambda function to search specific elements belonging in specific
* time-interval with end of time interval equal to present
*/
public void date_time_specific(DBEngine<string, DBElement<string, List<string>>> db, out IQuery<string, DBElement<string, List<string>>> i_query, QueryEngine<string, DBElement<string, List<string>>> qe, DateTime start, DateTime end = new DateTime())
{
"Query for keys with specified date time interval: start=10/4/2015 end=10/5/2015".title();
WriteLine();
Func<string, DateTime, DateTime, bool> TimeDateQuery = (string key, DateTime query_start, DateTime query_end) => //lambda function
{
if (!db.Keys().Contains(key))
return false;
else
{
DBElement<string, List<string>> ele = new DBElement<string, List<string>>();
db.getValue(key, out ele);
int start_result = DateTime.Compare(query_start, ele.timeStamp);
int end_result = DateTime.Compare(query_end, ele.timeStamp);
if ((start_result <= 0) && (end_result >= 0))
{
return true;
}
else return false;
}
};
// pass query to query engine and call simpleQuery to make query on DBEngine
qe.simpleQueryDate(TimeDateQuery, out i_query, start, end);
WriteLine();
foreach (var key in i_query.Keys())
{
DBElement<string, List<string>> temp = new DBElement<string, List<string>>();
i_query.getValue(key, out temp);
WriteLine("key : {0}", key);
temp.showEnumerableElement();
WriteLine();
}
}
/* Defining a query using lambda function to search specific string in metadata
*/
public bool metadata_string(DBEngine<string, DBElement<string, List<string>>> db, out IQuery<string, DBElement<string, List<string>>> i_query, QueryEngine<string, DBElement<string, List<string>>> qe, string metadata_str = "ele")
{
"Query for specified string in metadata: String = 'ele' ".title();
WriteLine();
Func<string, string, bool> stringMetadata = (string key, string search) => //lambda function
{
if (!db.Keys().Contains(key))
return false;
else
{
DBElement<string, List<string>> ele = new DBElement<string, List<string>>();
db.getValue(key, out ele);
if (ele.name.Contains(search) || ele.descr.Contains(search))
return true;
else return false;
}
};
// pass query to query engine and call simpleQuery to make query on DBEngine
if (qe.simpleQuery(stringMetadata, metadata_str, out i_query))
{
WriteLine();
foreach (var key in i_query.Keys())
{
DBElement<string, List<string>> temp = new DBElement<string, List<string>>();
i_query.getValue(key, out temp);
WriteLine("key : {0}", key);
temp.showEnumerableElement();
WriteLine();
}
return true;
} else
{
return false;
}
}
/* Defining a query using lambda function to search specific key matching default pattern
*/
public void default_pattern_matching(DBEngine<string, DBElement<string, List<string>>> db, out IQuery<string, DBElement<string, List<string>>> i_query, QueryEngine<string, DBElement<string, List<string>>> qe)
{
string pattern = "";
"Query for keys matching with specified pattern (pattern = none -> default case):".title();
WriteLine();
Func<string, string, bool> keysMatchingPattern = (string key, string search) => //lambda function
{
if (!db.Keys().Contains(key))
return false;
else
{
if (key.ToString().Contains(search))
{
DBElement<string, List<string>> ele = new DBElement<string, List<string>>();
db.getValue(key, out ele);
return true;
}
else return false;
}
};
// pass query to query engine and call simpleQuery to make query on DBEngine
qe.simpleQuery(keysMatchingPattern, pattern, out i_query);
WriteLine();
foreach (var key in i_query.Keys())
{
DBElement<string, List<string>> temp = new DBElement<string, List<string>>();
i_query.getValue(key, out temp);
WriteLine("key : {0}", key);
temp.showEnumerableElement();
WriteLine();
}
}
private void display_children(IQuery<string, DBElement<string, List<string>>> i_query, DBEngine<string, DBElement<string, List<string>>> db)
{
foreach (var key in i_query.Keys())
{
DBElement<string, List<string>> temp = new DBElement<string, List<string>>();
i_query.getValue(key, out temp);
WriteLine("children of element with key {0} :", key);
WriteLine();
if (temp.children != null)
{
int i = 0;
foreach (string child in temp.children)
{
WriteLine("Children {0}", ++i);
DBElement<string, List<string>> temp_child = new DBElement<string, List<string>>();
if (db.Keys().Contains(child))
{
db.getValue(child, out temp_child);
WriteLine("key : {0}", child);
temp_child.showEnumerableElement();
WriteLine();
}
else
{
WriteLine("no value with key {0} is present in database", child);
WriteLine();
}
}
}
}
}
/// <summary>
/// Creation of xml and the dbelement contents into xml
/// </summary>
/// <param name="db"></param>
/// <param name="displayItems"></param>
private static void XMLCreation(DBEngine<int, DBElement<int, string>> db, XElement displayItems)
{
foreach (int key in db.Keys())
{
XElement displayitem = new XElement("Item");
DBElement<int, string> elem = new DBElement<int, string>();
db.getValue(key, out elem);
XElement displayKey = new XElement("Key", key); //read the key
XElement displayValue = new XElement("Value"); //read the value
XElement displayName = new XElement("Name", elem.name); //read the name
XElement displayDescr = new XElement("Description", elem.descr); //read the desc
XElement displayTime = new XElement("TimeStamp", elem.timeStamp.ToString("yyyy-MM-dd HH:mm:ss"));
XElement displayChildren = new XElement("Children");
displayChildren = new XElement("Children"); //read the children into xml
foreach (var i in elem.children)
{
XElement displayChild = new XElement("Child", i);
displayChildren.Add(displayChild);
}
XElement displayPayLoad = new XElement("Payload", elem.payload); //read the payload
displayValue.Add(displayName);
displayValue.Add(displayDescr);
displayValue.Add(displayTime);
if (elem.children.Count > 0)
displayValue.Add(displayChildren);
displayValue.Add(displayPayLoad);
displayitem.Add(displayKey);
displayitem.Add(displayValue);
displayItems.Add(displayitem);
}
}
/* Defining a query using lambda function to search children of specific element
*/
public void key_children_search(DBEngine<int, DBElement<int, string>> db, IQuery<int, DBElement<int, string>> i_query, QueryEngine<int, DBElement<int, string>> qe)
{
int specific_key = 2;
"Query for children of specified key (key = 2):".title();
WriteLine();
Func<int, string, bool> childrenQuery = (int key, string search) => //lambda function
{
if (!db.Keys().Contains(key))
return false;
if (key == int.Parse(search))
{
DBElement<int, string> ele = new DBElement<int, string>();
db.getValue(key, out ele);
return true;
}
else return false;
};
// pass query to query engine and call simpleQuery to make query on DBEngine
qe.simpleQuery(childrenQuery, specific_key.ToString(), out i_query);
WriteLine();
foreach (var key in i_query.Keys())
{
DBElement<int, string> temp = new DBElement<int, string>();
i_query.getValue(key, out temp);
WriteLine("children of element with key {0} :", key);
WriteLine();
if (temp.children != null)
{
int i = 0;
foreach (int child in temp.children)
{
WriteLine("Children {0}", i++);
DBElement<int, string> temp_child = new DBElement<int, string>();
if (db.Keys().Contains(child))
{
db.getValue(child, out temp_child);
WriteLine("key : {0}", child);
temp_child.showElement();
WriteLine();
}
else
{
WriteLine("no value with key {0} is present in database", child);
WriteLine();
}
}
}
}
}
public void XMLWriteLOS(DBEngine<string, DBElement<string, List<string>>> dbLOS, out string pathnameLOS)
{
pathnameLOS = "xmlDocLOS.xml";
XDocument docLOS = new XDocument(new XElement("nosqldbLOS"));
docLOS.Declaration = new XDeclaration("1.0", "utf - 8", "yes");
XElement keyTypeLOS = new XElement("keytype", "string");
XElement payloadTypeLOS = new XElement("payloadtype", "ListOfString");
docLOS.Root.Add(keyTypeLOS);
docLOS.Root.Add(payloadTypeLOS);
DBElement<string, List<string>> ValLOS = new DBElement<string, List<string>>();
foreach (var keyLOS in dbLOS.Keys())
{
XElement keyNodeLOS = new XElement("key", keyLOS);
dbLOS.getValue(keyLOS, out ValLOS);
XElement elementNodeLOS = new XElement("element");
elementNodeLOS.Add(new XElement("name", ValLOS.name));
elementNodeLOS.Add(new XElement("descr", ValLOS.descr));
elementNodeLOS.Add(new XElement("timeStamp", ValLOS.timeStamp.ToString()));
XElement childrenNodeLOS = new XElement("children");
foreach (var item in ValLOS.children)
{
childrenNodeLOS.Add(new XElement("key", item));
}
elementNodeLOS.Add(childrenNodeLOS);
XElement payloadNodeLOS = new XElement("payload"); //since payload is List<string> for this type of database
foreach (var item in ValLOS.payload)
{
payloadNodeLOS.Add(new XElement("item", item));
}
elementNodeLOS.Add(payloadNodeLOS);
docLOS.Root.Add(keyNodeLOS);
docLOS.Root.Add(elementNodeLOS);
}
docLOS.Save(pathnameLOS);
}
/* Defining a query using lambda function to search children of specific element
*/
public bool key_children_search(DBEngine<string, DBElement<string, List<string>>> db, out IQuery<string, DBElement<string, List<string>>> i_query, QueryEngine<string, DBElement<string, List<string>>> qe, string specific_key = "element2")
{
"Query for children of specified key (key = element2):".title();
WriteLine();
Func<string, string, bool> childrenQuery = (string key, string search) => //lambda function
{
if (!db.Keys().Contains(key))
return false;
if (key == (search))
{
DBElement<string, List<string>> ele = new DBElement<string, List<string>>();
db.getValue(key, out ele);
return true;
}
else return false;
};
// pass query to query engine and call simpleQuery to make query on DBEngine
if (qe.simpleQuery(childrenQuery, specific_key.ToString(), out i_query))
{
WriteLine();
display_children(i_query, db);
return true;
}
else
{
return false;
}
}
private void restore_database(out string str, ref IEnumerator<string> msg_enumerator, DBEngine<int, DBElement<int, string>> db)
{
str = "";
"Database before restoring".title();
db.showDB();
Console.WriteLine();
while (msg_enumerator.MoveNext())
{
if (msg_enumerator.Current == "Source")
{
msg_enumerator.MoveNext();
Console.WriteLine(msg_enumerator.Current);
int count = db.Keys().ToArray().Length;
db.create_db_from_xml(msg_enumerator.Current);
if(db.Keys().ToArray().Length > count)
{
str += "Database Restored from " + msg_enumerator.Current + " file.";
} else
{
str += "Database not able to restore from " + msg_enumerator.Current + "file";
}
return;
}
}
str += "Database persistence failed.";
}
public void XMLRestoreLOS(string pathnameLOS, DBEngine<string, DBElement<string, List<string>>> dbLOS)
{
DBElement<string, List<string>> elemStringLOS;
XDocument xdocLOS = XDocument.Load(pathnameLOS);
var elemLOS = xdocLOS.Root.Elements("element"); //extracting all the elements from the xml file
foreach (XElement i in elemLOS)
{
XElement keyNodeLOS = (XElement)i.PreviousNode;
string keyLOS = keyNodeLOS.Value.ToString(); //we know that the key is of type string
if (!dbLOS.Keys().Contains(keyLOS))
{
elemStringLOS = new DBElement<string, List<string>>();
elemStringLOS.name = i.Element("name").Value.ToString();
elemStringLOS.timeStamp = Convert.ToDateTime(i.Element("timeStamp").Value.ToString()); //the format stored in the file may or may not be a string
elemStringLOS.descr = i.Element("descr").Value.ToString();
elemStringLOS.payload = new List<string>() { }; //we know that the payload is List<string>
elemStringLOS.children.Clear();
var childrenNode = i.Element("children").Elements("key");
foreach (var c in childrenNode)
elemStringLOS.children.Add(c.Value.ToString()); //since each child is a string
var payloadNode = i.Element("payload").Elements("item");
foreach (var p in payloadNode)
elemStringLOS.payload.Add(p.Value.ToString());
dbLOS.insert(keyLOS, elemStringLOS);
}
}
}
/* The restore functions capture elements from the XML files provided.
* Key will always be the node preceeding the element node in our file
* structure, so the previous node of element is our key for that element.
* Then the keys and the corresponding values are extracted and entered into
* the corresponding database. If a key is already present in the database,
* I have chosen to discard it.
*/
public void XMLRestore(string pathname, DBEngine<int, DBElement<int, string>> db)
{
DBElement<int, string> elemString;
XDocument xdoc = XDocument.Load(pathname);
var elem = xdoc.Root.Elements("element"); //extracting all elements from the file
foreach (XElement i in elem)
{
XElement keyNode = (XElement)i.PreviousNode;
int key = Int32.Parse(keyNode.Value.ToString()); //key is of type int for this database, so we need to cast it
if (!db.Keys().Contains(key))
{
elemString = new DBElement<int, string>();
elemString.name = i.Element("name").Value.ToString();
elemString.timeStamp = Convert.ToDateTime(i.Element("timeStamp").Value.ToString()); //the format extracted from the file may or may not be a string
elemString.descr = i.Element("descr").Value.ToString();
elemString.payload = i.Element("payload").Value.ToString(); //we know that the payload is string
elemString.children.Clear();
var childrenNode = i.Element("children").Elements("key"); //since each child of the element is stored as a <key> in the file
foreach (var c in childrenNode)
elemString.children.Add(Int32.Parse(c.Value));
db.insert(key, elemString);
}
}
}
private void time_date_inerval(out string str, ref IEnumerator<string> msg_enumerator, DBEngine<string, DBElement<string, List<string>>> db)
{
IQuery<string, DBElement<string, List<string>>> i_query = new DBEngine<string, DBElement<string, List<string>>>();
QueryEngine<string, DBElement<string, List<string>>> qe = new QueryEngine<string, DBElement<string, List<string>>>(db);
QueryPredicate qp = new QueryPredicate();
DateTime start = new DateTime();
DateTime end = new DateTime();
str = "";
bool flag = false;
while (msg_enumerator.MoveNext()) {
switch(msg_enumerator.Current.ToString())
{
case "sdate-time":
msg_enumerator.MoveNext();
DateTime.TryParse(msg_enumerator.Current.ToString(), out start);
break;
case "edate-time":
msg_enumerator.MoveNext();
if (msg_enumerator.Current.ToString() != "" && DateTime.TryParse(msg_enumerator.Current.ToString(), out end)) ;
else
flag = true;
break;
}
}
DBElement<string, List<string>> ele = new DBElement<string, List<string>>();
if (flag && qp.default_date_time_specific(db, out i_query, qe, start))
{
foreach (var key in i_query.Keys())
if (i_query.getValue(key, out ele))
str += " Element within timespan starting:" + start + " and ending: " + DateTime.Now + " found in Database.\n Key: " + key + "\nValue at given key: " + ele.showElement<string, List<string>, string>();
}
else if (qp.default_date_time_specific(db, out i_query, qe, start, end))
{
foreach (var key in i_query.Keys())
{
if (i_query.getValue(key, out ele))
{
str += " Element within timespan starting:" + start + " and ending: " + end + " found in Database.\n Key: " + key + "\nValue at given key: " + ele.showElement<string, List<string>, string>();
}
}
} else
{
str = "Element within timespan: " + start + " and ending: " + end + " Not found in Database.\n";
}
}
private void string_metadata(out string str, ref IEnumerator<string> msg_enumerator, DBEngine<string, DBElement<string, List<string>>> db)
{
IQuery<string, DBElement<string, List<string>>> i_query = new DBEngine<string, DBElement<string, List<string>>>();
QueryEngine<string, DBElement<string, List<string>>> qe = new QueryEngine<string, DBElement<string, List<string>>>(db);
QueryPredicate qp = new QueryPredicate();
string search = "";
str = "";
msg_enumerator.MoveNext();
msg_enumerator.MoveNext();
search = msg_enumerator.Current.ToString();
DBElement<string, List<string>> ele = new DBElement<string, List<string>>();
if (qp.metadata_string(db, out i_query, qe, search))
{
foreach (var key in i_query.Keys())
{
if (i_query.getValue(key, out ele))
{
str += " Element with string:" + search + " found in Database.\n Key: "+ key +"\nValue at given key: " + ele.showElement<string, List<string>, string>();
}
}
}
else
{
str = "Element with string: " + search + " in metadata Not found in Database.\n";
}
}
static void Main(string[] args)
{
//<------Create test DB----->
"Testing for PersistEngine package".title();
DBEngine<int, DBElement<int, string>> db = new DBEngine<int, DBElement<int, string>>();
DBEngine<string, DBElement<string, List<string>>> enum_db = new DBEngine<string, DBElement<string, List<string>>>();
for (int i = 0; i < 3; i++)
{
DBElement<int, string> elem = new DBElement<int, string>();
elem.name = "element";
elem.descr = "test element";
elem.timeStamp = DateTime.Now;
elem.children.AddRange(new List<int> { 1, 2, 3 });
elem.payload = "elem's payload";
elem.showElement();
db.insert(i, elem);
}
db.showDB();
WriteLine();
//<-------Save DB data to XML file--------->
"Demonstrating XDocument class".title('=');
WriteLine();
"Creating XML string using XDocument".title();
WriteLine();
db.create_xml_from_db(false);
//<---Empty DBEngine<int, DBElement<int, string>>--->
"Removing entries from Db if any".title();
if (db != null)
{
db.removeAll();
}
"Current DB state".title();
db.showDB();
WriteLine();
db.create_db_from_xml();
WriteLine();
//<---------Create test enum DB-------->
for (int i = 0; i < 3; i++)
{
DBElement<string, List<string>> elem = new DBElement<string, List<string>>();
elem.name = "element";
elem.descr = "test element";
elem.timeStamp = DateTime.Now;
elem.children.AddRange(new List<string> { "child1", "child2" });
elem.payload = new List<string> { "payload 1", "payload 2" };
elem.showEnumerableElement();
enum_db.insert(i.ToString(), elem);
}
enum_db.showEnumerableDB();
WriteLine();
//<-------Save enum_DB data to XML file--------->
"Creating XML string using XDocument".title();
enum_db.create_xml_from_enum_db(false);
WriteLine();
if (enum_db != null)
{
enum_db.removeAll();
}
//<----Empty DBEngine<string, DBElement<string, List<string>>----->
"Removing entries from enum Db if any".title();
if (enum_db != null)
{
string[] key_array = enum_db.Keys().ToArray();
foreach (string key in key_array)
{
enum_db.remove(key);
}
}
"Cureent enum DB state".title();
enum_db.showEnumerableDB();
WriteLine();
enum_db.create_enum_db_from_xml();
WriteLine();
WriteLine();
}
static void Main(string[] args)
{
"Testing PersistEngine Package".title('=');
WriteLine();
DBEngine<int, DBElement<int, string>> db = new DBEngine<int, DBElement<int, string>>();
"\nSave to an XML file".title();
DBElement<int, string> elem1 = new DBElement<int, string>();
elem1.name = "Usain Bolt";
elem1.descr = "Athelte";
elem1.timeStamp = DateTime.Now;
elem1.children.AddRange(new List<int> { 2 });
elem1.payload = "Fastest in the world";
db.insert(1, elem1);
DBElement<int, string> elem2 = new DBElement<int, string>();
elem2.name = "Saina Nehwal";
elem2.descr = "Badminton Player";
elem2.timeStamp = DateTime.Now;
elem2.children.AddRange(new List<int> { 1 });
elem2.payload = "Famous badminton player";
db.insert(2, elem2);
db.showDB();
WriteLine();
dynamic allKeys = db.Keys();
PersistEngine<int,DBElement<int,string>> pEngine = new PersistEngine<int, DBElement<int, string>>(db);
pEngine.persistToXML(allKeys);
WriteLine("\n\nAbove database is stored as XML file in local machine");
WriteLine();
WriteLine("\nThe persisted XML file along with new key/value pairs are augmented to the database.\n");
WriteLine("Below shown key/value pairs are augmented to the database.\n");
pEngine.augmentDatabaseFromXML(db); //Augment the persisted database along with new values to the main database
pEngine.persistToXML(allKeys);
db.showDB();
WriteLine();
WriteLine();
"\nPersist database every 5 seconds until its cancelled".title();
WriteLine();
pEngine.scheduledSaveDatabase();
WriteLine();
WriteLine();
"\nProject dependancy and realtionships".title();
WriteLine();
DBEngine<string, DBElement<string, List<string>>> dependancyDb = new DBEngine<string, DBElement<string, List<string>>>();
PersistEngine<string, DBElement<string, List<string>>> pEngineString = new PersistEngine<string, DBElement<string, List<string>>>(dependancyDb);
try
{
Console.WriteLine("\nBelow details provide information on dependancy of every package in the project\n");
pEngine.displayDependancy();
dependancyDb.showEnumerableDB();
WriteLine();
}
catch (Exception e)
{
WriteLine("\n" + e.Message + "\n");
}
}
static void Main(string[] args)
{
"Testing DBEngine Package".title('=');
WriteLine();
Write("\n --- Test DBElement<int,string> ---");
DBElement<int, string> elem1 = new DBElement<int, string>();
elem1.payload = "a payload";
Write(elem1.showElement<int, string>());
WriteLine();
DBElement<int, string> elem2 = new DBElement<int, string>("Darth Vader", "Evil Overlord");
elem2.payload = "The Empire strikes back!";
Write(elem2.showElement<int, string>());
WriteLine();
var elem3 = new DBElement<int, string>("Luke Skywalker", "Young HotShot");
elem3.children.AddRange(new List<int> { 1, 5, 23 });
elem3.payload = "X-Wing fighter in swamp - Oh oh!";
Write(elem3.showElement<int, string>());
WriteLine();
Write("\n --- Test DBEngine<int,DBElement<int,string>> ---");
int key = 0;
Func<int> keyGen = () => { ++key; return key; }; // anonymous function to generate keys
DBEngine<int, DBElement<int, string>> db = new DBEngine<int, DBElement<int, string>>();
bool p1 = db.insert(keyGen(), elem1);
bool p2 = db.insert(keyGen(), elem2);
bool p3 = db.insert(keyGen(), elem3);
if (p1 && p2 && p3)
Write("\n all inserts succeeded");
else
Write("\n at least one insert failed");
db.show<int, DBElement<int, string>, string>();
WriteLine();
WriteLine();
"testing edits".title();
db.show<int, DBElement<int, string>, string>();
DBElement<int, string> editElement = new DBElement<int, string>();
db.getValue(1, out editElement);
editElement.showElement<int, string>();
editElement.name = "editedName";
editElement.descr = "editedDescription";
db.show<int, DBElement<int, string>, string>();
Write("\n\n");
"Test for interface IQuery".title();
IQuery<int, DBElement<int, string>> iq = db;
foreach (int db_key in iq.Keys())
{
DBElement<int, string> ele = new DBElement<int, string>();
iq.getValue(db_key, out ele);
WriteLine("element at key {0}: {1}", db_key, ele);
}
int[] key_array = db.Keys().ToArray();
WriteLine("removing element with key:{0} from database <int, DBElement<int, string>>",key_array[2]);
WriteLine();
db.remove(key_array[2]);
db.show<int, DBElement<int, string>, string>();
WriteLine();
WriteLine("Removing all elements from database:");
db.removeAll();
WriteLine("DB after removal:");
db.show<int, DBElement<int, string>, string>();
Write("\n --- Test DBElement<string,List<string>> ---");
DBElement<string, List<string>> newelem1 = new DBElement<string, List<string>>();
newelem1.name = "newelem1";
newelem1.descr = "test new type";
newelem1.payload = new List<string> { "one", "two", "three" };
Write(newelem1.showElement<string, List<string>>());
WriteLine();
Write("\n --- Test DBElement<string,List<string>> ---");
DBElement<string, List<string>> newerelem1 = new DBElement<string, List<string>>();
newerelem1.name = "newerelem1";
newerelem1.descr = "better formatting";
newerelem1.payload = new List<string> { "alpha", "beta", "gamma" };
newerelem1.payload.Add("delta");
newerelem1.payload.Add("epsilon");
Write(newerelem1.showElement<string, List<string>, string>());
WriteLine();
DBElement<string, List<string>> newerelem2 = new DBElement<string, List<string>>();
newerelem2.name = "newerelem2";
newerelem2.descr = "better formatting";
newerelem1.children.AddRange(new[] { "first", "second" });
newerelem2.payload = new List<string> { "a", "b", "c" };
newerelem2.payload.Add("d");
newerelem2.payload.Add("e");
Write(newerelem2.showElement<string, List<string>, string>());
WriteLine();
Write("\n --- Test DBEngine<string,DBElement<string,List<string>>> ---");
int seed = 0;
string skey = seed.ToString();
Func<string> skeyGen = () => {
++seed;
skey = "string" + seed.ToString();
skey = skey.GetHashCode().ToString();
return skey;
};
DBEngine<string, DBElement<string, List<string>>> newdb =
new DBEngine<string, DBElement<string, List<string>>>();
newdb.insert(skeyGen(), newerelem1);
newdb.insert(skeyGen(), newerelem2);
newdb.show<string, DBElement<string, List<string>>, List<string>, string>();
WriteLine();
WriteLine();
string[] key_enum_array = newdb.Keys().ToArray();
WriteLine("removing element with key:{0} from database <string, DBElement<int, List<string>>>",key_enum_array[0]);
WriteLine();
newdb.remove(key_enum_array[0]);
newdb.show<string, DBElement<string, List<string>>, List<string>, string>();
WriteLine();
WriteLine("removing all elements from database:");
newdb.removeAll();
WriteLine("DB after removal:");
newdb.show<string, DBElement<string, List<string>>, List<string>, string>();
}
public void performOperations(DBEngine<string, DBElement<string, List<string>>> testDict, DBElement<string, List<string>> value)
{ /*----------Perform operations as per the input given in the XML document--------------*/
if (value.operation == "addition")
{
testDict.insert(value.key, value); //insert the key/value pairs to the main database
string s = "Database after inserting key " + value.key + " is";
printDatabase(testDict, s);
}
if (value.operation == "edit")
{
testDict.saveValue(value.key, value); //edit the value for the given key
string s = "Database after editing key " + value.key + " is";
printDatabase(testDict, s);
}
if (value.operation == "delete")
{
testDict.delete(value.key); //delete the key/value pair
string s = "Database after deleting key " + value.key + " is";
printDatabase(testDict, s);
}
if (value.operation == "persist database")
{
PersistEngine<string, DBElement<string, List<string>>> persist = new PersistEngine<string, DBElement<string, List<string>>>(testDict);
var keys = testDict.Keys();
persist.persistToXMLListPayload(keys);
printDatabase(testDict, "Persisted database is:");
}
if (value.operation == "Query value")
{
DBElement<string, List<string>> valueOfKey = testDict.getValueOfKey(value.key);
printQuery("Querying the database for value of key " + value.key + " is");
Console.WriteLine("\n\nThe value of the Key {0} is:\n", value.key);
valueOfKey.showEnumerableElement();
}
if (value.operation == "Query children")
{
QueryEngine<string, DBElement<string, List<string>>> qEngine = new QueryEngine<string, DBElement<string, List<string>>>(testDict);
printQuery("Querying the database for value of key " + value.key + " is");
List<string> children = qEngine.getChildrenOfKey(value.key);
Console.WriteLine("\nThe children of the Key {0} are:\n", value.key);
displayChildren(children);
}
if (value.operation == "Augment database")
{
PersistEngine<string, DBElement<string, List<string>>> persist = new PersistEngine<string, DBElement<string, List<string>>>(testDict);
string fileName = "C:\\Users\\rakeshh91\\Documents\\Rakesh Documents\\Class Materials\\SMA\\Assignments\\Assignment 4 - Implementation\\CommPrototype\\augmentDatabase.xml";
persist.augmentDatabaseFromXMLStringList(testDict, fileName);
printDatabase(testDict, "Database after augmenting is:");
}
}