BAEL-3326, "Optimizing JSON Schema for production use":

Added domain classes and JUnit tests.

json/src/main/java/com/baeldung/jsonoptimization/CustomerSlim.java

@@ -0,0 +1,74 @@
+package com.baeldung.jsonoptimization;
+
+import java.util.Objects;
+
+public class CustomerSlim {
+    private long id;
+    private String name;
+    private String address;
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(address, id, name);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof CustomerSlim)) {
+            return false;
+        }
+        CustomerSlim other = (CustomerSlim) obj;
+        return Objects.equals(address, other.address) && id == other.id && Objects.equals(name, other.name);
+    }
+
+    @Override
+    public String toString() {
+        return "CustomerSlim [id=" + id + ", name=" + name + ", address=" + address + "]";
+    }
+
+    public static CustomerSlim[] fromCustomers(Customer[] customers) {
+        CustomerSlim[] feedback = new CustomerSlim[customers.length];   
+            
+        for(int i = 0; i < customers.length; i++) {
+            Customer aCustomer = customers[i];
+            CustomerSlim newOne = new CustomerSlim();
+            
+            newOne.setId(aCustomer.getId());
+            newOne.setName(aCustomer.getFirstName() + " " + aCustomer.getLastName());
+            newOne.setAddress(aCustomer.getStreet() + ", " + aCustomer.getCity() + " " + aCustomer.getState() + " " + aCustomer.getPostalCode());
+            
+            feedback[i] = newOne;
+        }
+        
+        return feedback;
+    }
+
+
+}