public override int Transform([NotNull] GlobalContext globalContext, Ignore Ignore,
[NotNull] TransformOptions transformOptions, [NotNull][ItemNotNull] IEnumerable <Dependency> dependencies,
[NotNull] List <Dependency> transformedDependencies)
{
// Only items are changed (Order is added)
transformedDependencies.AddRange(dependencies);
// Algorithm:
// LOOP
// Find the item with the least outgoing edges (measured relative to outgoing and ingoing ones)
// Put it into result list; and move edges to it from consideration
// UNTIL list of items is empty
MatrixDictionary <Item, int> aggregatedCounts =
MatrixDictionary.CreateCounts(dependencies.Where(d => !Equals(d.UsingItem, d.UsedItem)), transformOptions.OrderBy, globalContext.CurrentGraph);
for (int i = 0; aggregatedCounts.ColumnKeys.Any(); i++)
{
var itemsToSortValues =
aggregatedCounts.ColumnKeys.Select(
k => new {
Item = k,
Value = transformOptions.GetSortValue(aggregatedCounts.GetRowSum(k), aggregatedCounts.GetColumnSum(k))
});
decimal minToRatio = itemsToSortValues.Min(ir => ir.Value);
Item minItem = itemsToSortValues.First(ir => ir.Value == minToRatio).Item;
aggregatedCounts.RemoveColumn(minItem);
minItem.IncrementMarker(transformOptions.OrderMarkerPrefix + i.ToString("D4"));
}
return(Program.OK_RESULT);
}
private static void Mark(MatrixDictionary <Item, int> aggregatedCounts,
Func <MatrixDictionary <Item, int>, IEnumerable <Item> > getKeys,
Func <Item, int> sum, bool ignoreSelfCyclesInSourcesAndSinks, bool recursive, string markerToAdd)
{
bool itemRemoved;
do
{
itemRemoved = false;
foreach (var i in getKeys(aggregatedCounts).ToArray())
{
if (sum(i) == (ignoreSelfCyclesInSourcesAndSinks ? aggregatedCounts.Get(i, i) : 0))
{
aggregatedCounts.RemoveRow(i);
aggregatedCounts.RemoveColumn(i);
i.IncrementMarker(markerToAdd);
itemRemoved = true;
}
}
} while (recursive && itemRemoved);
}
public void TestMatrixDictionary()
{
var d = new MatrixDictionary <string, int>((s, i) => s + i, (s, i) => s - i);
// | A B C D #
// ---------------------#----
// A | 15 100 0 . # 115
// B | 3 20 101 . # 124
// C | 7 5 30 . # 42
// D | . 2 300 . # 302
// =========================
// | 25 127 431 0 #
d.Add("A", "A", 15);
d.Add("A", "B", 100);
d.Add("A", "C", 0);
d.Add("B", "A", 3);
d.Add("B", "B", 20);
d.Add("B", "C", 101);
d.Add("C", "A", 7);
d.Add("C", "B", 5);
d.Add("C", "C", 30);
d.Add("D", "B", 2);
d.Add("D", "C", 300);
Assert.AreEqual(115, d.GetRowSum("A"));
Assert.AreEqual(124, d.GetRowSum("B"));
Assert.AreEqual(42, d.GetRowSum("C"));
Assert.AreEqual(302, d.GetRowSum("D"));
Assert.AreEqual(25, d.GetColumnSum("A"));
Assert.AreEqual(127, d.GetColumnSum("B"));
Assert.AreEqual(431, d.GetColumnSum("C"));
Assert.AreEqual(0, d.GetColumnSum("D"));
CollectionAssert.IsSubsetOf(new[] { "A", "B", "C", "D" }, d.RowKeys.ToList());
CollectionAssert.IsSubsetOf(new[] { "A", "B", "C" }, d.ColumnKeys.ToList());
for (int i = 0; i < 2; i++)
{
Assert.IsTrue(d.RemoveRow("B"));
// | A B C D #
// ---------------------#----
// A | 15 100 0 . # 115
// B | - - - . # -
// C | 7 5 30 . # 42
// D | . 2 300 . # 302
// =========================
// | 22 107 330 0 #
Assert.AreEqual(115, d.GetRowSum("A"));
Assert.AreEqual(0, d.GetRowSum("B"));
Assert.AreEqual(42, d.GetRowSum("C"));
Assert.AreEqual(302, d.GetRowSum("D"));
Assert.AreEqual(22, d.GetColumnSum("A"));
Assert.AreEqual(107, d.GetColumnSum("B"));
Assert.AreEqual(330, d.GetColumnSum("C"));
Assert.AreEqual(0, d.GetColumnSum("D"));
CollectionAssert.IsSubsetOf(new[] { "A", "C", "D" }, d.RowKeys.ToList());
CollectionAssert.IsSubsetOf(new[] { "A", "B", "C" }, d.ColumnKeys.ToList());
}
Assert.IsTrue(d.RemoveRow("B"));
Assert.IsFalse(d.RemoveRow("B"));
for (int i = 0; i < 2; i++)
{
Assert.IsTrue(d.RemoveColumn("A"));
// | A B C D #
// ---------------------#----
// A | = 100 0 . # 100
// B | - - - . # -
// C | = 5 30 . # 35
// D | . 2 300 . # 302
// =========================
// | 0 107 330 0 #
Assert.AreEqual(100, d.GetRowSum("A"));
Assert.AreEqual(0, d.GetRowSum("B"));
Assert.AreEqual(35, d.GetRowSum("C"));
Assert.AreEqual(302, d.GetRowSum("D"));
Assert.AreEqual(0, d.GetColumnSum("A"));
Assert.AreEqual(107, d.GetColumnSum("B"));
Assert.AreEqual(330, d.GetColumnSum("C"));
Assert.AreEqual(0, d.GetColumnSum("D"));
CollectionAssert.IsSubsetOf(new[] { "A", "C", "D" }, d.RowKeys.ToList());
CollectionAssert.IsSubsetOf(new[] { "B", "C" }, d.ColumnKeys.ToList());
}
Assert.IsTrue(d.RemoveColumn("A"));
Assert.IsFalse(d.RemoveColumn("A"));
}
