Splitwise design

splitwise/Balance.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package splitwise;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ *
+ * @author rajeshkumar.yadav
+ */
+public class Balance {
+
+    Map<Integer, Double> pay;
+    Map<Integer, Double> getBack;
+
+    public Balance() {
+        pay = new HashMap<Integer, Double>();
+        getBack = new HashMap<Integer, Double>();
+    }
+
+    public Map<Integer, Double> getPay() {
+        return pay;
+    }
+
+    public void setPay(Map<Integer, Double> pay) {
+        this.pay = pay;
+    }
+
+    public Map<Integer, Double> getGetBack() {
+        return getBack;
+    }
+
+    public void setGetBack(Map<Integer, Double> getBack) {
+        this.getBack = getBack;
+    }
+
+}

splitwise/Equal.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package splitwise;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+/**
+ *
+ * @author rajeshkumar.yadav
+ */
+
+public class Equal extends ExpenseType{
+
+    public Equal(int amount) {
+        super(amount);
+    }
+
+    public void split(List<User> l1){
+
+        User PaidByUSer = l1.get(0);
+        double divamount = getAmount()/l1.size();
+        l1.remove(0);
+        List<Double> amount = new ArrayList<>();
+        for(int i=0; i<l1.size(); i++)
+            amount.add(divamount);
+
+        Exact ex = new Exact();
+        ex.split(l1, amount, PaidByUSer);
+
+    }
+
+
+
+}

splitwise/Exact.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package splitwise;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ *
+ * @author rajeshkumar.yadav
+ */
+public class Exact extends ExpenseType{
+
+    public Exact() {
+        super(0);
+    }
+
+    public void split(List<User> l1, List<Double> l2, User paidByUser){
+
+        Balance paidByUserBalance  = paidByUser.getBalance();
+        int paidByUserId = paidByUser.getUseId();
+
+        for(int i=0; i<l1.size(); i++)
+        {
+            Balance b = l1.get(i).getBalance();
+            Map<Integer, Double> m = b.getPay();
+
+            if(m.get(paidByUserId) != null)
+            {
+                m.put(paidByUserId, m.get(paidByUserId) + l2.get(i));
+            }else
+            {
+                m.put(paidByUserId, l2.get(i));
+            }
+
+            Map<Integer, Double> paidByUserGetBackMap = paidByUserBalance.getGetBack();
+
+            if(paidByUserGetBackMap.get(l1.get(i).getUseId()) != null)
+            {
+                paidByUserGetBackMap.put(l1.get(i).getUseId(), paidByUserGetBackMap.get(l1.get(i).getUseId()) + l2.get(i));
+
+            }else
+            {
+                paidByUserGetBackMap.put(l1.get(i).getUseId(), l2.get(i));
+            }
+
+        }
+    }
+}

splitwise/ExpenseType.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package splitwise;
+
+import java.util.List;
+
+/**
+ *
+ * @author rajeshkumar.yadav
+ */
+public class ExpenseType {
+
+    private int amount;
+    public void split(List<User> l1, List<Double> l2, User paidByUser){
+
+    }
+    public void split(List<User> l1, List<Integer> l2){
+    }
+    public void split(List<User> l1){
+    }
+
+    public ExpenseType(int amount) {
+        this.amount = amount;
+    }
+
+     public int getAmount() {
+        return amount;
+    }
+
+    public void setAmount(int amount) {
+        this.amount = amount;
+    }
+}

splitwise/Percentage.java

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+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package splitwise;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ *
+ * @author rajeshkumar.yadav
+ */
+public class Percentage extends ExpenseType{
+
+    public Percentage(int amount) {
+        super(amount);
+    }
+
+    public void split(List<User> l1, List<Integer> l2){
+
+        int sum = 0;
+        for(int i=0; i<l2.size(); i++)
+        {
+            sum = sum + l2.get(i);
+        }
+        if(sum != 100)
+        {
+            System.err.println("Not a proper percentage division ");
+            return;
+        }
+
+        List<Double> list1 = new ArrayList<Double>();
+        for(int i=0; i<l2.size(); i++)
+        {
+            double d = (getAmount() * l2.get(i)) / 100;
+            list1.add(d);
+        }
+
+        User paidByUser = l1.get(0);
+        l1.remove(0);
+        Exact ex = new Exact();
+        ex.split(l1, list1, paidByUser);
+    }
+
+
+}