//----< write enumerable db elements out to Console >--------------
public static void showEnumerable <Key, Value, Data, T>(this DBEngine <Key, Value> db)
where Data : IEnumerable <T>
{
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.showEnumerableElement <Key, Data, T>());
}
}
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");
}
public static void showEnumerableElement(this DBElement <string, List <string> > enumElement)
{
Console.Write(enumElement.showEnumerableElement <string, List <string>, string>());
}
void TestR12()
{
try
{
"\nThe database is shown below:".title();
WriteLine("\n Key: Apple");
DBElement <string, List <string> > elem1 = new DBElement <string, List <string> >();
elem1.name = "Apple";
elem1.descr = "Type of fruit";
elem1.timeStamp = DateTime.Now;
elem1.children.AddRange(new List <string> {
"three"
});
elem1.payload = new List <string> {
"Seven"
};
elem1.category = new List <string> {
"fruit", "drink"
};
dbCategory.insert("Apple", elem1);
elem1.showEnumerableElement();
displayCategory(elem1.category);
WriteLine("\n Key: Banana");
DBElement <string, List <string> > elem2 = new DBElement <string, List <string> >();
elem2.name = "Banana";
elem2.descr = "Type of fruit";
elem2.timeStamp = DateTime.Now;
elem2.children.AddRange(new List <string> {
"two"
});
elem2.payload = new List <string> {
"Five", "Six"
};
elem2.category = new List <string> {
"fruit"
};
dbCategory.insert("Banana", elem2);
elem2.showEnumerableElement();
displayCategory(elem2.category);
WriteLine("\n Key: Blackberry");
DBElement <string, List <string> > elem3 = new DBElement <string, List <string> >();
elem3.name = "Blackberry";
elem3.descr = "Type of fruit or phone";
elem3.timeStamp = DateTime.Now;
elem3.children.AddRange(new List <string> {
"one"
});
elem3.payload = new List <string> {
"Eight"
};
elem3.category = new List <string> {
"fruit", "phone"
};
dbCategory.insert("Blackberry", elem3);
elem3.showEnumerableElement();
displayCategory(elem3.category);
dictCategory = new Dictionary <string, List <string> >();
dictCategory.Add("fruit", new List <string> {
"Apple", "Banana"
});
List <string> values = new List <string>();
dictCategory.TryGetValue("fruit", out values);
dynamic result = qEngine.getKeyForCategory(dbCategory, values);
"\nMatched keys for category 'fruit'".title();
displayStringKeys(result);
}
catch (Exception e) { WriteLine("\n" + e.Message + "\n"); }
}
