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)
{
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 = "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>();
QueryEngine <int, string> QETest = new QueryEngine <int, string>(db);
WriteLine();
Write("\n --- Query element which key=2");
QueryEngine <int, string> query = new QueryEngine <int, string>(db);
DBElement <int, string> elem;
bool valQuery = query.KeyQuery(2, out elem);
if (valQuery)
{
Write("\n This element exist");
}
Write(elem.showElement <int, string>());
WriteLine();
Write("\n --- Test queries for children of a specified key ---");
Write("\n --- Query for children of element which key=3 ---");
List <int> children;
bool childQuery = query.queryChildren(3, out children);
if (childQuery)
{
Write("\n This element has child");
}
foreach (var child in children)
{
Write("\n Key of child: {0}", child.ToString());
}
WriteLine();
Write("\n --- Test all keys that contain a specified string in their metadata section---");
Write("\n --- query for \"star war\" in metadata, return keys ---");
Func <int, bool> stringTest = QETest.defineStringQuery("star war");
List <int> keyCollection;
bool stringQuery = QETest.processQuery(stringTest, out keyCollection);
foreach (var k in keyCollection)
{
Write("\n Key: {0}", k.ToString());
}
WriteLine();
WriteLine("\n --- Test query according to a specified time-date interval ---");
DateTime time1 = new DateTime(2015, 10, 1, 0, 0, 0);
DateTime time2 = new DateTime(2015, 10, 2, 11, 0, 0);
List <int> timeCollection;
Func <int, bool> timeTest = QETest.defineTimeQuery(time1, time2);
bool timeResult = QETest.processQuery(timeTest, out timeCollection);
foreach (var k in timeCollection)
{
WriteLine("key in specific time interval: {0}", k.ToString());
}
WriteLine();
WriteLine("--- When time is not provided ---");
DateTime time3 = new DateTime();
timeTest = QETest.defineTimeQuery(time1, time3);
bool timeQuery2 = QETest.processQuery(timeTest, out timeCollection);
foreach (var k in timeCollection)
{
WriteLine("key in specific time interval: {0}", k.ToString());
}
WriteLine();
}