Create Formatter for "slice" output

Author: jarc0der

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

@@ -0,0 +1,95 @@
+package com.google.hashcode.utils;
+
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+
+import com.google.hashcode.entity.Cell;
+import com.google.hashcode.entity.Ingredient;
+
+/**
+ * 
+ * @author Tuzhanskyi (jarc0der)
+ *
+ */
+
+public class Formatter {
+	private List<List<Cell>> cellList;
+	private final Comparator<Cell> comp = ((thisCell, thatCell) -> {
+		if(thisCell.x != thatCell.x){
+			return Integer.compare(thisCell.x, thatCell.x);
+		}else{
+			return Integer.compare(thisCell.y, thatCell.y);
+		}
+	});
+
+	public Formatter(List<List<Cell>> list) {
+		this.cellList = list;
+	}
+
+	public Formatter() {
+		this(hardInit());
+		// this.cellList = hardInit();
+	}
+
+	public void writeResultsToFile(String fileName) throws IOException {
+
+		try (BufferedWriter out = new BufferedWriter(new FileWriter(fileName))) {
+			out.write("" + cellList.size());
+			out.newLine();
+			for (List<Cell> slice : cellList) {
+				Cell maxCell = slice.stream().max(comp).get();
+				Cell minCell = slice.stream().min(comp).get();
+				
+				String coords = getCoordsLineForSlice(minCell, maxCell);
+				out.write(coords);
+				out.newLine();
+			}
+			
+			//check: autoflush?
+			out.flush();
+		}
+
+	}
+
+	private String getCoordsLineForSlice(Cell min, Cell max) {
+		StringBuilder sb = new StringBuilder();
+		sb.append(min.y).append(" " + min.x).append(" " + max.y).append(" " + max.x);
+		return sb.toString();
+	}
+
+	private static List<List<Cell>> hardInit() {
+		List<List<Cell>> resultList = new ArrayList<>();
+		List<Cell> slice0 = new ArrayList<>();
+		List<Cell> slice1 = new ArrayList<>();
+		List<Cell> slice2 = new ArrayList<>();
+
+		slice0.add(new Cell(0, 0, Ingredient.TOMATO));
+		slice0.add(new Cell(0, 1, Ingredient.TOMATO));
+		slice0.add(new Cell(0, 2, Ingredient.TOMATO));
+		slice0.add(new Cell(1, 0, Ingredient.TOMATO));
+		slice0.add(new Cell(1, 1, Ingredient.MUSHROOM));
+		slice0.add(new Cell(1, 2, Ingredient.TOMATO));
+
+		slice1.add(new Cell(2, 0, Ingredient.TOMATO));
+		slice1.add(new Cell(2, 1, Ingredient.MUSHROOM));
+		slice1.add(new Cell(2, 2, Ingredient.TOMATO));
+
+		slice2.add(new Cell(3, 0, Ingredient.TOMATO));
+		slice2.add(new Cell(3, 1, Ingredient.MUSHROOM));
+		slice2.add(new Cell(3, 2, Ingredient.TOMATO));
+		slice2.add(new Cell(4, 0, Ingredient.TOMATO));
+		slice2.add(new Cell(4, 1, Ingredient.TOMATO));
+		slice2.add(new Cell(4, 2, Ingredient.TOMATO));
+
+		resultList.add(slice0);
+		resultList.add(slice1);
+		resultList.add(slice2);
+
+		return resultList;
+	}
+}