Merged categories into one file

src/main/java/entities/Categories.java

@@ -0,0 +1,28 @@
+package entities;
+
+public class Categories {
+
+    public enum ExpenseCategory {
+        MISC;
+
+        public String getEffectiveName() {
+            return Categories.getEffectiveName(this.name());
+        }
+    }
+
+    public enum IncomeCategory {
+        MISC;
+
+        public String getEffectiveName() {
+            return Categories.getEffectiveName(this.name());
+        }
+    }
+
+    private static String getEffectiveName(String name) {
+        String[] arr = name.split("");
+        StringBuilder result = new StringBuilder(arr[0].toLowerCase());
+        for(int i = 1; i < name.length(); i++) result.append(arr[i]);
+        return result.toString();
+    }
+
+}

src/main/java/entities/Expense.java

@@ -1,12 +1,12 @@
 package entities;
 
-public class Expense extends MoneyTransaction {
+public class Expense implements IMoneyTransaction {
 
     private int userId;
     private int amount;
-    private ExpensesCategory category;
+    private Categories.ExpenseCategory category;
 
-    public Expense(int userId, int amount, ExpensesCategory category) {
+    public Expense(int userId, int amount, Categories.ExpenseCategory category) {
         this.userId = userId;
         this.amount = amount;
         this.category = category;
@@ -32,10 +32,10 @@ public class Expense extends MoneyTransaction {
 
     @Override
     public String getCategory() {
-        return category.toString();
+        return category.getEffectiveName();
     }
 
-    public void setCategory(ExpensesCategory category) {
+    public void setCategory(Categories.ExpenseCategory category) {
         this.category = category;
     }
 }

src/main/java/entities/ExpensesCategory.java

@@ -1,5 +0,0 @@
-package entities;
-
-public enum ExpensesCategory {
-    MISC;
-}

src/main/java/entities/IMoneyTransaction.java

@@ -0,0 +1,9 @@
+package entities;
+
+public interface IMoneyTransaction {
+
+    long getUserId();
+    int getAmount();
+    String getCategory();
+
+}

src/main/java/entities/Income.java

@@ -1,12 +1,12 @@
 package entities;
 
-public class Income extends MoneyTransaction {
+public class Income implements IMoneyTransaction {
 
     private long userId;
     private int amount;
-    private IncomeCategory category;
+    private Categories.IncomeCategory category;
 
-    public Income(long userId, int amount, IncomeCategory category) {
+    public Income(long userId, int amount, Categories.IncomeCategory category) {
         this.userId = userId;
         this.amount = amount;
         this.category = category;
@@ -24,7 +24,7 @@ public class Income extends MoneyTransaction {
 
     @Override
     public String getCategory() {
-        return category.toString();
+        return category.getEffectiveName();
     }
 
     public void setUserId(long userId) {
@@ -35,7 +35,7 @@ public class Income extends MoneyTransaction {
         this.amount = amount;
     }
 
-    public void setCategory(IncomeCategory category) {
+    public void setCategory(Categories.IncomeCategory category) {
         this.category = category;
     }
 }

src/main/java/entities/IncomeCategory.java

@@ -1,5 +0,0 @@
-package entities;
-
-public enum IncomeCategory {
-    MISC;
-}

src/main/java/entities/MoneyTransaction.java

@@ -1,9 +0,0 @@
-package entities;
-
-public abstract class MoneyTransaction {
-
-    public abstract long getUserId();
-    public abstract int getAmount();
-    public abstract String getCategory();
-
-}