public bool searchInterval(string startDate, string EndDate, DBEngine<Key, DBElement<Key, Data>> db, out List<Key> resultKeys)
{
//----------< Returns the set of keys whose DateTimes are more
//----------< than the given start date and less than the given
//----------< end date. Default for end date is DateTime.Now >--------------
resultKeys = db.Keys().ToList<Key>();
resultKeys.Clear();
DateTime start = Convert.ToDateTime(startDate); //Source: https://msdn.microsoft.com/en-us/library/cc165448.aspx
DateTime end;
if (EndDate == "")
end = DateTime.Now;
else
end = Convert.ToDateTime(EndDate);
bool flag = false;
List<Key> Keys = db.Keys().ToList<Key>();
DBElement<Key, Data> elem = new DBElement<Key, Data>();
foreach (Key key in Keys)
{
db.getValue(key, out elem);
if ((elem.timeStamp >= start) && (elem.timeStamp <= end))
{
resultKeys.Add(key);
flag = true;
}
}
if (flag)
return true;
return false;
}
public bool searchString(string pattern, DBEngine <Key, DBElement <Key, Data> > db, out List <Key> resultKeys)
{
//------------< Returns set of keys whose metadata contain the given string >-------------
resultKeys = db.Keys().ToList <Key>();
resultKeys.Clear();
List <Key> Keys = db.Keys().ToList <Key>();
DBElement <Key, Data> elem = new DBElement <Key, Data>();
bool flag = false;
foreach (Key key in Keys)
{
db.getValue(key, out elem);
if ((elem.name.ToString().IndexOf(pattern) >= 0) || (elem.descr.ToString().IndexOf(pattern) >= 0) || (elem.timeStamp.ToString().IndexOf(pattern) >= 0))
{
resultKeys.Add(key);
flag = true;
}
else
{
foreach (var child in elem.children) //search each child for the string
{
if (child.ToString().IndexOf(pattern) >= 0)
{
resultKeys.Add(key);
flag = true;
}
}
}
}
if (flag)
{
return(true);
}
return(false);
}
/*void TestR3()
* {
* //----------< Demonstrating adding and removing of elements >-----------
* "Demonstrating Requirement #3".title();
* WriteLine();
* "Adding <int, string> elements".title('-');
* DBElement<int, string> elem = new DBElement<int, string>();
* elem.name = "Element 1";
* elem.descr = "Test Element (int, string)";
* elem.timeStamp = DateTime.Now;
* elem.children.AddRange(new List<int> { 1, 2, 3 });
* elem.payload = "Element 1's payload. (string)";
* WriteLine(elem.showElement());
* bool p1 = db.insert(1, elem);
* WriteLine();
* DBElement<int, string> elem1 = new DBElement<int, string>();
* elem1.name = "Element 2";
* elem1.descr = "Again <int, string> but no children!";
* elem1.timeStamp = DateTime.Now;
* elem1.children.Clear();
* elem1.payload = "Element 2's payload. (string)";
* WriteLine(elem1.showElement());
* bool p2 = db.insert(2, elem1);
* WriteLine();
* DBElement<int, string> elem2 = new DBElement<int, string>();
* elem2.name = "Element 3";
* elem2.descr = "Test Element <int, string>. Different timeStamp.";
* elem2.children.AddRange(new List<int> { 1, 2, 3 });
* elem2.timeStamp = DateTime.UtcNow;
* elem2.payload = "Element 3's payload. (string)";
* WriteLine(elem2.showElement());
* WriteLine();
* bool p3 = db.insert(3, elem2);
* "Adding <string, List<string>> elements".title('-');
* DBElement<string, List<string>> newelem = new DBElement<string, List<string>>();
* newelem.name = "New elem";
* newelem.descr = "Element 4. <string, List<string>>";
* newelem.timeStamp = DateTime.Now;
* newelem.children.AddRange(new List<string> { "one", "two", "three" });
* newelem.payload = new List<string> { "one", "two", "three" };
* Write(newelem.showElement<string, List<string>, string>());
* bool p4 = dbLOS.insert("Four", newelem);
* Console.WriteLine("\n\nInserting elements... ");
* if (p1 && p2 && p3 && p4)
* Console.WriteLine("All inserts succeeded");
* else
* Console.WriteLine("\n\nAt Least one insert failed");
* "Database".title('-');
* db.show<int, DBElement<int, string>, string>();
* dbLOS.show<string, DBElement<string, List<string>>, List<string>, string>();
* WriteLine();
* "Removing elements".title();
* DBElement<int, string> pay = new DBElement<int, string>();
* db.remove(1, out pay);
* Console.Write("\n\nRemoved element: {0}", pay.name);
* WriteLine();
* db.remove(2, out pay);
* Console.Write("\n\nRemoved element: {0}", pay.name);
* WriteLine();
* db.remove(3, out pay);
* Console.Write("\n\nRemoved element: {0}", pay.name);
* WriteLine();
* "Database".title();
* db.show<int, DBElement<int, string>, string>();
* dbLOS.show<string, DBElement<string, List<string>>, List<string>, string>();
* WriteLine();
* }*/
void TestR4()
{
//----------< Demonstrating editing of items >-------------
"Demonstrating Requirement #4".title();
WriteLine();
"Editing an item".title();
"Old Database".title();
db.show <int, DBElement <int, string>, string>();
dbLOS.show <string, DBElement <string, List <string> >, List <string>, string>();
WriteLine();
DBElement <string, List <string> > editElement = new DBElement <string, List <string> >();
dbLOS.getValue("Four", out editElement);
editElement.name = "Element 4 (edited)";
editElement.descr = "New description";
editElement.timeStamp = DateTime.Now;
editElement.children.Clear();
editElement.children.Add("five");
editElement.payload = new List <string> {
"four", "five", "six"
};
editElement.payload.Add("eight");
dbLOS.insert("Four", editElement);
"New Database".title();
db.show <int, DBElement <int, string>, string>();
dbLOS.show <string, DBElement <string, List <string> >, List <string>, string>();
WriteLine();
}
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);
}
void TestR3()
{
"Demonstrating Requirement #3".title();
Write("\n --- show orginal database ---");
DBElement <int, string> elem2 = new DBElement <int, string>("Darth Vader", "element");
elem2.payload = "The Empire strikes back!";
dbInt.insert(2, elem2);
dbInt.showDB();
WriteLine();
Write("\n --- add a new key/value pair ---");
DBElement <int, string> elem3 = new DBElement <int, string>("Luke Skywalker", "element");
elem3.children.AddRange(new List <int> {
1, 5, 23
});
elem3.payload = "X-Wing fighter in swamp - Oh oh!";
dbInt.insert(3, elem3);
dbInt.showDB();
WriteLine();
Write("\n --- delete key/value pair where key=1");
dbInt.delete(1);
dbInt.showDB();
WriteLine();
}
void TestR9()
{
"Demonstrating Requirement #9".title();
DBElement <string, List <string> > pack1 = new DBElement <string, List <string> >("DBElement.cs", "package structure");
packages.insert("DBElement", pack1);
DBElement <string, List <string> > pack2 = new DBElement <string, List <string> >("DBEngine.cs", "package structure");
packages.insert("DBEngine", pack2);
DBElement <string, List <string> > pack3 = new DBElement <string, List <string> >("DBFactory.cs", "package structure");
pack3.children.AddRange(new List <string> {
"DBEngine"
});
packages.insert("DBFactory", pack3);
DBElement <string, List <string> > pack4 = new DBElement <string, List <string> >("Dispaly.cs", "package structure");
pack4.children.AddRange(new List <string> {
"DBElement", "DBEngine", "DBExtensions", "UtilityExtentions"
});
packages.insert("Display", pack4);
DBElement <string, List <string> > pack5 = new DBElement <string, List <string> >("PersistEngine.cs", "package structure");
pack5.children.AddRange(new List <string> {
"DBElement", "DBEngine"
});
packages.insert("PersistEngine", pack5);
DBElement <string, List <string> > pack6 = new DBElement <string, List <string> >("QueryEngine.cs", "package structure");
pack6.children.AddRange(new List <string> {
"DBElement", "DBEngine"
});
packages.insert("QueryEngine", pack6);
DBElement <string, List <string> > pack7 = new DBElement <string, List <string> >("Scheduler.cs", "package structure");
pack7.children.AddRange(new List <string> {
"DBElement", "DBEngine", "PersistEngine"
});
packages.insert("Scheduler", pack7);
DBElement <string, List <string> > pack8 = new DBElement <string, List <string> >("TestExec.cs", "package structure");
pack8.children.AddRange(new List <string> {
"DBElement", "DBEngine", "PersistEngine", "DBExtensions", "DBFactory", "Display", "QueryEngine", "Scheduler", "UtiltiyExtension"
});
packages.insert("TestExec", pack8);
foreach (var key in packages.Keys())
{
DBElement <string, List <string> > elem;
packages.getValue(key, out elem);
elem.payload = new List <string>();
elem.payload.AddRange(new List <string> {
"content"
});
}
PersistWapper <string, DBElement <string, List <string> > > persist = new StringAndStringList(packages);
persist.writeToXML("project2.xml");
Write("\n write the package structure into XML file ./project2.xml");
WriteLine();
}
//----< write metadata to string >-------------------------------------
public static string showMetaData <Key, Data>(this DBElement <Key, Data> elem)
{
StringBuilder accum = new StringBuilder();
accum.Append(String.Format("\n name: {0}", elem.name));
accum.Append(String.Format("\n desc: {0}", elem.descr));
accum.Append(String.Format("\n time: {0}", elem.timeStamp));
if (elem.children.Count() > 0)
{
accum.Append(String.Format("\n Children: "));
bool first = true;
foreach (Key key in elem.children)
{
if (first)
{
accum.Append(String.Format("{0}", key.ToString()));
first = false;
}
else
{
accum.Append(String.Format(", {0}", key.ToString()));
}
}
}
return(accum.ToString());
}
//----< write details of element with enumerable Data to string >------
public static string showElement <Key, Data, T>(this DBElement <Key, Data> elem)
where Data : IEnumerable <T> // constraint clause
{
StringBuilder accum = new StringBuilder();
accum.Append(elem.showMetaData());
if (elem.payload != null)
{
IEnumerable <object> d = elem.payload as IEnumerable <object>;
if (d == null)
{
accum.Append(String.Format("\n payload: {0}", elem.payload.ToString()));
}
else
{
bool first = true;
accum.Append(String.Format("\n payload:\n "));
foreach (var item in elem.payload) // won't compile without constraint clause
{
if (first)
{
accum.Append(String.Format("{0}", item));
first = false;
}
else
{
accum.Append(String.Format(", {0}", item));
}
}
}
}
return(accum.ToString());
}
/* 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);
}
}
}
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);
}
}
}
// Query for the value of specific key
public bool KeyQuery(Key key, out DBElement <Key, Data> elem)
{
if (db.getValue(key, out elem))
{
return(true);
}
return(false);
}
static void Main(string[] args)
{
"Testing DBElement Package".title('=');
WriteLine();
Write("\n --- Test DBElement<int,string> ---");
WriteLine();
DBElement <int, string> elem1 = new DBElement <int, string>();
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 = new List <int> {
1, 2, 7
};
elem3.payload = "X-Wing fighter in swamp - Oh oh!";
Write(elem3.showElement <int, string>());
WriteLine();
Write("\n --- Test DBElement<string,List<string>> ---");
WriteLine();
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>, string>());
WriteLine();
DBElement <string, List <string> > newerelem1 = new DBElement <string, List <string> >();
newerelem1.name = "newerelem1";
newerelem1.descr = "same stuff";
newerelem1.children.Add("first_key");
newerelem1.children.Add("second_key");
newerelem1.payload = new List <string> {
"alpha", "beta", "gamma"
};
newerelem1.payload.AddRange(new[] { "delta", "epsilon" });
Write(newerelem1.showElement <string, List <string>, string>());
WriteLine();
Write("\n\n");
}
static void Main(string[] args)
{
Write("\n --- Test specific key query ---");
Write("\n ---Database contents");
DBElement <int, string> elem1 = new DBElement <int, string>();
elem1.descr = "payload desxription";
elem1.name = "element 1";
elem1.timeStamp = DateTime.Now;
elem1.payload = "a payload";
WriteLine();
DBElement <int, string> elem2 = new DBElement <int, string>("Darth Vader", "Evil Overlord");
elem2.descr = "star war 2";
elem2.name = "element 2";
elem2.timeStamp = new DateTime(2015, 9, 10, 12, 30, 1);
elem2.payload = "The Empire strikes back!";
WriteLine();
var elem3 = new DBElement <int, string>("Luke Skywalker", "Young HotShot");
elem3.name = "fight";
elem3.descr = "star war 3";
elem3.timeStamp = new DateTime(2015, 10, 2, 8, 0, 0);
elem3.children = new List <int> {
1, 2, 3
};
elem3.payload = "X-Wing fighter in swamp - Oh oh!";
WriteLine();
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);
db.show <int, DBElement <int, string>, string>();
WriteLine();
Write("\n --- Test creation of immutable database ---");
Write("\n --- create database for elements which contain \"element\" in metadata ---");
QueryEngine <int, string> query = new QueryEngine <int, string>(db);
Func <int, bool> defineQuery = query.defineStringQuery("element");
List <int> keyCollection;
bool result = query.processQuery(defineQuery, out keyCollection);
immutableDB <int, DBElement <int, string> > imdb = new immutableDB <int, DBElement <int, string> >(db, keyCollection);
imdb.ImmutableDB.showDB();
WriteLine();
}
//----< write simple db elements out to Console >------------------
public static void show <Key, Value, Data>(this DBEngine <Key, Value> db)
{
foreach (Key key in db.Keys())
{
Value value;
db.getValue(key, out value);
DBElement <Key, Data> elem = value as DBElement <Key, Data>;
Write("\n\n -- key = {0} --", key);
Write(elem.showElement());
}
}
//----< write details of element with simple Data to string >----------
public static string showElement <Key, Data>(this DBElement <Key, Data> elem)
{
StringBuilder accum = new StringBuilder();
accum.Append(elem.showMetaData());
if (elem.payload != null)
{
accum.Append(String.Format("\n payload: {0}", elem.payload.ToString()));
}
return(accum.ToString());
}
public override bool restore(string XmlFile)
{
XDocument doc = XDocument.Load(XmlFile);
persistDB = new DBEngine <string, DBElement <string, List <string> > >();
if (doc == null)
{
return(false);
}
XDocument xml = XDocument.Parse(doc.ToString());
IEnumerable <XElement> allElem = xml.Descendants("element");
foreach (var elem in allElem)
{
IEnumerable <XElement> keys = elem.Descendants("key");
IEnumerable <XElement> names = elem.Descendants("name");
IEnumerable <XElement> descrs = elem.Descendants("descr");
IEnumerable <XElement> timestamps = elem.Descendants("timestamp");
IEnumerable <XElement> children = elem.Descendants("children").Descendants("key");
IEnumerable <XElement> payloads = elem.Descendants("payload");
DBElement <string, List <string> > element = new DBElement <string, List <string> >();
string key = keys.ElementAt(0).Value;
foreach (var name_ in names)
{
element.name = name_.Value;
}
foreach (var descr_ in descrs)
{
element.descr = descr_.Value;
}
foreach (var timestamp_ in timestamps)
{
element.timeStamp = (DateTime)timestamp_;
}
foreach (var child in children)
{
element.children.Add(child.Value);
}
element.payload = new List <string>();
foreach (var payload_ in payloads)
{
foreach (var item in payload_.Descendants("item"))
{
element.payload.Add(item.Value);
}
}
persistDB.insert(key, element);
}
return(true);
}
public void showDBF(DBFactory<Key, Value, Data> db) //Source: DBExtensions.cs
{
foreach (Key key in db.Keys())
{
Value value;
db.getValue(key, out value);
DBElement<Key, Data> elem = value as DBElement<Key, Data>;
Write("\n\n -- key = {0} --\n", key);
Console.WriteLine("Name: {0}", elem.name);
Console.WriteLine("Description: {0}", elem.descr);
Console.WriteLine("Timestamp: {0}", elem.timeStamp.ToString());
Console.WriteLine("Children: {0}", qe.ToString(elem.children));
//Console.WriteLine("Payload: {0}", qe.ToString(payload)); //-- Can't cast Data as Generic List
}
}
static void Main(string[] args)
{
TestWriteToXML();
Write("\n --- Test persist <string,<List<string>> to XML ---");
DBElement <string, List <string> > elem1 = new DBElement <string, List <string> >();
elem1.name = "elemLos1";
elem1.descr = "element with ListOfString payload";
elem1.timeStamp = new DateTime(2015, 10, 2, 11, 0, 0);
elem1.payload = new List <string> {
"one", "two", "three", "four", "five"
};
DBElement <string, List <string> > elem2 = new DBElement <string, List <string> >();
elem2.name = "elemLos2";
elem2.descr = "element with ListOfString payload";
elem2.timeStamp = new DateTime(2015, 10, 2, 10, 0, 0);
elem2.children = new List <string> {
"key1", "key2", "key3"
};
elem2.payload = new List <string> {
"alpha", "beta", "gamma", "delta", "epsilon"
};
DBEngine <string, DBElement <string, List <string> > > db = new DBEngine <string, DBElement <string, List <string> > >();
bool p1 = db.insert("key15", elem1);
bool p2 = db.insert("key16", elem2);
if (p1 && p2)
{
Write("\n all inserts succeeded");
}
else
{
Write("\n at least one insert failed");
}
PersistWapper <string, DBElement <string, List <string> > > persist2 = new StringAndStringList(db);
persist2.writeToXML("DatabaseContent.xml");
persist2.persistDB = new DBEngine <string, DBElement <string, List <string> > >();
if (persist2.restore("DatabaseContent.xml"))
{
persist2.persistDB.show <string, DBElement <string, List <string> >, List <string>, string>();
}
WriteLine();
}
//-------------< Following is the demonstration of each requirement, for each database type >----------
void TestR2()
{
//----< Demonstrating the structure of each element of the database. Taking only <int, string> for now >-------
"Demonstrating Requirement #2".title('-');
WriteLine();
"Element Structure (Key=int, Value=DBElement<int, string>)".title('-');
DBElement<int, string> elem = new DBElement<int, string>();
elem.name = "Test Element";
elem.descr = "Description";
elem.timeStamp = DateTime.Now;
elem.children.Add(5);
elem.payload = "Hello!";
Write(elem.showElement<int, string>());
WriteLine();
db.insert(0, elem);
}
static void Main(string[] args)
{
"Testing DBFactory Package".title('=');
WriteLine();
DBEngine<int, DBElement<int, string>> db = new DBEngine<int, DBElement<int, string>>();
DBElement<int, string> elem = new DBElement<int, string>();
elem.name = "Name";
elem.descr = "Description";
elem.timeStamp = DateTime.Now;
elem.children.Add(1);
elem.payload = "Payload";
db.insert(1, elem);
DBFactory<int, DBElement<int, string>, string> dbFact = new DBFactory<int, DBElement<int, string>, string>(new List<int> { 1 }, db);
dbFact.showDBF(dbFact);
}
// test write DBEngine<int,DBElement<int,string>> to xml
static void TestWriteToXML()
{
Write("\n ---convert database content to XML ---");
DBElement <int, string> elem1 = new DBElement <int, string>();
elem1.descr = "payload desxription";
elem1.name = "element 1";
elem1.timeStamp = DateTime.Now;
elem1.payload = "a payload";
WriteLine();
DBElement <int, string> elem2 = new DBElement <int, string>("Darth Vader", "Evil Overlord");
elem2.descr = "star war 2";
elem2.name = "element 2";
elem2.timeStamp = new DateTime(2015, 9, 10, 12, 30, 1);
elem2.payload = "The Empire strikes back!";
WriteLine();
var elem3 = new DBElement <int, string>("Luke Skywalker", "Young HotShot");
elem3.name = "element 3";
elem3.descr = "star war 3";
elem3.timeStamp = new DateTime(2015, 10, 2, 8, 0, 0);
elem3.children = new List <int> {
1, 2, 3
};
elem3.payload = "X-Wing fighter in swamp - Oh oh!";
WriteLine();
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);
db.show <int, DBElement <int, string>, string>();
WriteLine();
IntAndString test = new IntAndString(db);
test.writeToXML("DatabaseContent.xml");
Write("\n XML file has been created in ./bin/Debug");
}
public bool getChildren(Key key, DBEngine<Key, DBElement<Key, Data>> db, out List<Key> children)
{
//--------------< Returns the list of children for a specified key in a specified db >------------
children = new List<Key>() { };
DBElement<Key, Data> Result = new DBElement<Key, Data>();
if (db.Keys().Contains(key))
{
children.Clear();
db.getValue(key, out Result);
foreach (var child in Result.children)
children.Add(child);
return true;
}
Result = default(DBElement<Key, Data>);
children = default(List<Key>);
return false;
}
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);
}
static void Main(string[] args)
{
DBElement <int, string> elem1 = new DBElement <int, string>();
elem1.descr = "payload desxription";
elem1.name = "element 1";
elem1.timeStamp = DateTime.Now;
elem1.payload = "a payload";
DBElement <int, string> elem2 = new DBElement <int, string>("Darth Vader", "Evil Overlord");
elem2.descr = "star war 2";
elem2.name = "element 2";
elem2.timeStamp = new DateTime(2015, 9, 10, 12, 30, 1);
elem2.payload = "The Empire strikes back!";
var elem3 = new DBElement <int, string>("Luke Skywalker", "Young HotShot");
elem3.name = "element 3";
elem3.descr = "star war 3";
elem3.timeStamp = new DateTime(2015, 10, 2, 8, 0, 0);
elem3.children = new List <int> {
1, 2, 3
};
elem3.payload = "X-Wing fighter in swamp - Oh oh!";
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);
WriteLine("--- Test Scheduler ---");
PersistWapper <int, DBElement <int, string> > persist = new IntAndString(db);
Schedular <int, DBElement <int, string> > test = new Schedular <int, DBElement <int, string> >();
test.autoSave(persist, 1000, "DatabaseContent.xml");
ReadKey();
}
void TestR2()
{
"Demonstrating Requirement #2".title();
Write("\n --- When the instance is string --- \n");
DBElement <int, string> elem1 = new DBElement <int, string>();
elem1.showElement();
dbInt.insert(1, elem1);
dbInt.showDB();
WriteLine();
Write("\n --- When the instance is a list of string ---");
DBElement <string, List <string> > elem2 = new DBElement <string, List <string> >();
elem2.name = "elementLos1";
elem2.descr = "element with ListofStrings payload";
elem2.timeStamp = new DateTime(2015, 9, 29, 12, 0, 0);
elem2.payload = new List <string> {
"one", "two", "three", "four", "five"
};
elem2.showElement();
DBListOfString.insert("key15", elem2);
DBElement <string, List <string> > elem3 = new DBElement <string, List <string> >();
elem3.name = "elemLos2";
elem3.descr = "element with ListOfString payload";
elem3.timeStamp = new DateTime(2015, 10, 2, 10, 0, 0);
elem3.children = new List <string> {
"key1", "key2", "key3"
};
elem3.payload = new List <string> {
"alpha", "beta", "gamma", "delta", "epsilon"
};
elem3.showElement();
DBListOfString.insert("key16", elem3);
DBListOfString.showEnumerableDB();
WriteLine();
}
static void Main(string[] args)
{
"Testing DBExtensions 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>());
DBEngine <int, DBElement <int, string> > dbs = new DBEngine <int, DBElement <int, string> >();
dbs.insert(1, elem1);
dbs.show <int, DBElement <int, string>, string>();
WriteLine();
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.children = new List <string> {
"Key1", "Key2"
};
newelem1.payload = new List <string> {
"one", "two", "three"
};
Write(newelem1.showElement <string, List <string>, string>());
DBEngine <string, DBElement <string, List <string> > > dbe = new DBEngine <string, DBElement <string, List <string> > >();
dbe.insert("key1", newelem1);
dbe.show <string, DBElement <string, List <string> >, List <string>, string>();
Write("\n\n");
}
void TestR7()
{
"Demonstrating Requirement #7".title();
Write("\n --- Test query ---");
DBElement <int, string> elem1 = new DBElement <int, string>();
elem1.timeStamp = DateTime.Now;
elem1.payload = "default payload";
dbInt.insert(1, elem1);
Write("\n --show orginal database--");
dbInt.showDB();
WriteLine();
Write("\n --- Query for the value of a specified key=2 ---");
QueryEngine <int, string> query = new QueryEngine <int, string>(dbInt);
DBElement <int, string> elem;
query.KeyQuery(2, out elem);
elem.showElement();
WriteLine();
Write("\n --- Query for all children of a specified key---");
List <int> children;
bool child = query.queryChildren(3, out children);
if (child)
{
foreach (var c in children)
{
Write("\n child is {0}", c.ToString());
}
}
else
{
Write("\n This element doesn't contain key");
}
WriteLine();
}
static void Main(string[] args)
{
"Testing DBEngine Package".title('=');;
WriteLine();
"Test db of scalar elements".title();
WriteLine();
DBElement <int, string> elem1 = new DBElement <int, string>();
elem1.payload = "a payload";
DBElement <int, string> elem2 = new DBElement <int, string>("Darth Vader", "Evil Overlord");
elem2.payload = "The Empire strikes back!";
var elem3 = new DBElement <int, string>("Luke Skywalker", "Young HotShot");
elem3.payload = "X-Wing fighter in swamp - Oh oh!";
if (verbose)
{
Write("\n --- Test DBElement<int,string> ---");
WriteLine();
elem1.showElement();
WriteLine();
elem2.showElement();
WriteLine();
elem3.showElement();
WriteLine();
/* ElementFormatter is not ready for prime time yet */
//Write(ElementFormatter.formatElement(elem1.showElement<int, string>(), false));
}
Write("\n --- Test DBEngine<int,DBElement<int,string>> ---");
WriteLine();
int key = 0;
Func <int> keyGen = () => { ++key; return(key); };
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.showDB();
WriteLine();
"Test db of enumerable elements".title();
WriteLine();
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"
};
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");
DBElement <string, List <string> > newerelem2 = new DBElement <string, List <string> >();
newerelem2.name = "newerelem2";
newerelem2.descr = "better formatting";
newerelem2.children.AddRange(new List <string> {
"first", "second"
});
newerelem2.payload = new List <string> {
"a", "b", "c"
};
newerelem2.payload.Add("d");
newerelem2.payload.Add("e");
if (verbose)
{
Write("\n --- Test DBElement<string,List<string>> ---");
WriteLine();
newelem1.showEnumerableElement();
WriteLine();
newerelem1.showEnumerableElement();
WriteLine();
newerelem2.showEnumerableElement();
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(), newelem1);
newdb.insert(skeyGen(), newerelem1);
newdb.insert(skeyGen(), newerelem2);
newdb.showEnumerableDB();
Write("\n\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();
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();
"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>();
WriteLine();
Write("\n\n");
"testing removal".title();
db.show <int, DBElement <int, string>, string>();
DBElement <int, string> pay = new DBElement <int, string>();
db.remove(1, out pay);
Console.Write("\n\nRemoved element: {0}", pay.name);
WriteLine();
newdb.show <string, DBElement <string, List <string> >, List <string>, string>();
db.show <int, DBElement <int, string>, string>();
Write("\n\n");
}
private string pathnameLOS = ""; // they can be reused later.
static void Main(string[] args)
{
PersistEngine pe = new PersistEngine();
TEST_PERSISTENGINE pet = new TEST_PERSISTENGINE();
DBEngine <int, DBElement <int, string> > db = new DBEngine <int, DBElement <int, string> >();
DBEngine <string, DBElement <string, List <string> > > dbLOS = new DBEngine <string, DBElement <string, List <string> > >();
DBElement <int, string> elem = new DBElement <int, string>();
DBElement <string, List <string> > elemLOS = new DBElement <string, List <string> >();
//Adding DBElement<int, string>
elem.name = "name";
elem.descr = "descr";
elem.timeStamp = DateTime.Now;
elem.children.AddRange(new List <int>()
{
1, 2, 3
});
elem.payload = "hello";
db.insert(0, elem);
DBElement <int, string> elem1 = new DBElement <int, string>();
elem1.name = "name1";
elem1.descr = "descr1";
elem1.children.AddRange(new List <int>()
{
1, 2, 3
});
elem1.timeStamp = DateTime.Now;
elem1.payload = "hello1";
db.insert(1, elem1);
//Adding DBElement<string, List<string>>
elemLOS.name = "name2";
elemLOS.descr = "descr2";
elem.timeStamp = DateTime.Now;
elemLOS.payload = new List <string>()
{
"hello", "world"
};
dbLOS.insert("Two", elemLOS);
elemLOS = new DBElement <string, List <string> >();
elemLOS.name = "name3";
elemLOS.descr = "descr3";
elemLOS.timeStamp = DateTime.Now;
elemLOS.children.AddRange(new List <string>()
{
"One", "Two", "Three"
});
elemLOS.payload = new List <string>()
{
"fee", "foo", "bar"
};
dbLOS.insert("Three", elemLOS);
pe.XMLWrite(db, out pet.pathname);
pe.XMLWriteLOS(dbLOS, out pet.pathnameLOS);
WriteLine("\n{0}", XDocument.Load(pet.pathname).ToString());
WriteLine("\n{0}", XDocument.Load(pet.pathnameLOS).ToString());
pe.XMLRestore("../../xmlRestore.xml", db);
db.show <int, DBElement <int, string>, string>();
pe.XMLRestoreLOS("../../xmlRestoreLOS.xml", dbLOS);
dbLOS.show <string, DBElement <string, List <string> >, List <string>, string>();
}