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();
}
void TestR8()
{
"Demonstrating Requirement #8".title();
Write("\n Create a new immutable database");
List <int> result;
QueryEngine <int, string> query = new QueryEngine <int, string>(dbInt);
Func <int, bool> defineQuery = query.defineStringQuery("element");
query.processQuery(defineQuery, out result);
Write("\n Query for \"element\" in metadata first, return a list of key");
Write("\n Use the list of key to build immutable database");
immutableDB <int, DBElement <int, string> > immdb = new immutableDB <int, DBElement <int, string> >(dbInt, result);
Write("\n Show the immutable database");
immdb.ImmutableDB.showDB();
WriteLine();
}