DFSmethods. Add the Step entity. Add TODO instructions and new methods signatures.

Author: LyashenkoGS

src/main/java/com/google/hashcode/entity/Step.java

@@ -0,0 +1,14 @@
+package com.google.hashcode.entity;
+
+/**
+ * Step as an entity is a slice tha can be added to a particular slice inside a particular pizza, considering
+ * pizza's slice instructions
+ *
+ * @author Grigoriy Lyashenko (Grog).
+ */
+public class Step {
+
+    public Slice startPosition;
+
+    public Cell delta;
+}

src/main/java/com/google/hashcode/utils/DFSMethods.java

@@ -3,7 +3,7 @@
 import com.google.hashcode.entity.Cell;
 import com.google.hashcode.entity.Pizza;
 import com.google.hashcode.entity.Slice;
-import com.google.hashcode.entity.SliceInstruction;
+import com.google.hashcode.entity.Step;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -18,7 +18,6 @@ public abstract class DFSMethods {
     private DFSMethods() {
     }
 
-
     /**
      * Step as an entity is an amount of a pizza cells, that can be added to a slice of a pizza or a pizza cell.<br>
      * Step as an action is a process of:<br>
@@ -58,16 +57,25 @@ public static Optional<Slice> rightStep(Pizza pizza, Slice slice) {
     }
 
     /**
-     * Step as an action it's a process, when a slice adding to itself a subset of a pizza cells and remains rectangular.
-     * Step as an entity is a Slice tha can be added to a particular slice inside a particalur pizza
-     * considering slice instructions
+     * Step as an action it's a process, when a slice adding to itself a subset of a pizza cells and remains rectangular
+     * and valid.
      *
-     * @param pizza            given pizza
-     * @param slice            given slice in the pizza
-     * @param sliceInstruction restrictions for a steps
+     * @param pizza  given pizza
+     * @param output given slice in the pizza
      * @return available steps
      */
-    List<Slice> getAvailableSteps(Pizza pizza, Slice slice, SliceInstruction sliceInstruction) {
+    List<Step> getAvailableSteps(Pizza pizza, List<Slice> output) {
+        //TODO implement.For each slice find all available steps. We DON'T change the pizza on this stage
+        return new ArrayList<>();
+    }
+
+    Slice performStep(Pizza pizza, List<Step> steps) {
+        //TODO pick-ups a step with a minimal steps number, execute it(cut it from the pizza, and a slice)
+        return null;
+    }
+
+    List<Slice> cutAllStartPositions(Pizza pizza) {
+        //TODO pick-ups a step with a minimal steps number, execute it(cut it from the pizza, and a slice). The pizza is a mutable object
         return new ArrayList<>();
     }
 

src/main/java/com/google/hashcode/utils/IoUtils.java

@@ -87,6 +87,7 @@ public static String convertToHumanReadableTable(Cell[][] ingredients) {
             output.append("\n");
         }
         return output.toString();
+        //TODO reimplement for the pizza
     }
 
     /**