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")); }