Refactoring in Piece and Pawn

app/src/main/java/com/example/paktalin/agilejava_exercises/pieces/Bishop.java

 package com.example.paktalin.agilejava_exercises.pieces;
 
-import com.example.paktalin.agilejava_exercises.Position;
-
 /**
  * Created by Paktalin on 01/06/2018.
  */
 
 public class Bishop extends Piece {
+
     public Bishop(Piece.Color color) {
         strength = 3;
         representation = 'b';

app/src/main/java/com/example/paktalin/agilejava_exercises/pieces/Knight.java

 package com.example.paktalin.agilejava_exercises.pieces;
 
-import com.example.paktalin.agilejava_exercises.Position;
-
 /**
  * Created by Paktalin on 01/06/2018.
  */

app/src/main/java/com/example/paktalin/agilejava_exercises/pieces/Pawn.java

 package com.example.paktalin.agilejava_exercises.pieces;
 
-import com.example.paktalin.agilejava_exercises.Position;
-
 import java.util.List;
 
 /**
@@ -27,8 +25,16 @@ public class Pawn extends Piece {
     }
 
     private static boolean pawnsOnSameColumn(Piece currentPiece, Piece piece) {
-        return piece.getPosition().getColumn() == currentPiece.getPosition().getColumn() &&
-                piece.getPosition().getRow() != currentPiece.getPosition().getRow() &&
-                piece.getClass() == currentPiece.getClass();
+        return sameColumn(currentPiece, piece) &&
+                sameRow(currentPiece, piece) &&
+                piece.getClass() == Pawn.class;
+    }
+
+    private static boolean sameColumn(Piece piece1, Piece piece2) {
+        return piece2.getPosition().getColumn() == piece1.getPosition().getColumn();
+    }
+
+    private static boolean sameRow(Piece piece1, Piece piece2) {
+        return piece2.getPosition().getRow() == piece1.getPosition().getRow();
     }
 }

app/src/main/java/com/example/paktalin/agilejava_exercises/pieces/Piece.java

@@ -17,22 +17,25 @@ public abstract class Piece implements Comparable<Piece> {
 
     public enum Color {White, Black}
     Color color;
+    private Position position;
 
     double strength;
-    private Position position;
     MoveStrategy moveStrategy;
     char representation;
 
     Piece() {}
 
-    public void setPosition(Position position) {
-        this.position = position;
+    @Override
+    public int compareTo(@NonNull Piece that) {
+        if (this.getStrength() > that.getStrength())
+            return -1;
+        if (this.getStrength() < that.getStrength())
+            return 1;
+        return 0;
     }
 
-    public char getRepresentation() {
-        if (isBlack())
-            return Character.toUpperCase(representation);
-        return representation;
+    public void setPosition(Position position) {
+        this.position = position;
     }
 
     public void setStrength(List<Piece> pieces) {}
@@ -41,39 +44,37 @@ public abstract class Piece implements Comparable<Piece> {
         this.strength = strength;
     }
 
-    @Override
-    public int compareTo(@NonNull Piece that) {
-        if (this.getStrength() > that.getStrength())
-            return -1;
-        if (this.getStrength() < that.getStrength())
-            return 1;
-        return 0;
-    }
-
-    public boolean isMovable(Position from, Position to){
-        return moveStrategy.isMovable(from, to);
+    public char getRepresentation() {
+        if (isBlack())
+            return Character.toUpperCase(representation);
+        return representation;
     }
 
     public double getStrength() {
-        return this.strength;
+        return strength;
     }
+
     public Color getColor() {
         return color;
     }
+
     public Position getPosition() {
         return position;
     }
 
-    boolean isColor(Color color) {
-        return this.color == color;
-    }
     public boolean isWhite() {
-        return isColor(Color.White);
+        return this.color == Color.White;
     }
+
     public boolean isBlack() {
-        return isColor(Color.Black);
+        return this.color == Color.Black;
     }
+
     public boolean isAtPosition(Position position) {
         return this.position.equals(position);
     }
+
+    public boolean isMovable(Position from, Position to){
+        return moveStrategy.isMovable(from, to);
+    }
 }
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