spring-projects#278 - Fix entity characteristics in Customer in Eclipselink example.

We now calculate the equals(…) and hashCode() methods by looking at the indentifier only. Removed default constructor in favor of Lombok's @NoArgConstructor.

Author: odrotbohm

jpa/eclipselink/src/main/java/example/springdata/jpa/eclipselink/Customer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 the original author or authors.
+ * Copyright 2015-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,26 +15,26 @@
  */
 package example.springdata.jpa.eclipselink;
 
+import lombok.AccessLevel;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import lombok.RequiredArgsConstructor;
+
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
 
-import lombok.Data;
-import lombok.RequiredArgsConstructor;
-
 /**
  * @author Oliver Gierke
  */
 @Data
 @Entity
+@EqualsAndHashCode(of = "id")
 @RequiredArgsConstructor
+@NoArgsConstructor(force = true, access = AccessLevel.PRIVATE)
 public class Customer {
 
 	private @Id @GeneratedValue Long id;
 	private final String firstname, lastname;
-
-	Customer() {
-		this.firstname = null;
-		this.lastname = null;
-	}
 }