BAEL-3091: The Prototype Pattern in Java (changed code based on valid comments from a reader)

linkrest/src/main/java/com/baeldung/cayenne/Department.java

@@ -0,0 +1,9 @@
+package com.baeldung.cayenne;
+
+import com.baeldung.cayenne.auto._Department;
+
+public class Department extends _Department {
+
+    private static final long serialVersionUID = 1L; 
+
+}

linkrest/src/main/java/com/baeldung/cayenne/Employee.java

@@ -0,0 +1,9 @@
+package com.baeldung.cayenne;
+
+import com.baeldung.cayenne.auto._Employee;
+
+public class Employee extends _Employee {
+
+    private static final long serialVersionUID = 1L; 
+
+}

linkrest/src/main/java/com/baeldung/cayenne/auto/_Department.java

@@ -0,0 +1,44 @@
+package com.baeldung.cayenne.auto;
+
+import java.util.List;
+
+import org.apache.cayenne.CayenneDataObject;
+import org.apache.cayenne.exp.Property;
+
+import com.baeldung.cayenne.Employee;
+
+/**
+ * Class _Department was generated by Cayenne.
+ * It is probably a good idea to avoid changing this class manually,
+ * since it may be overwritten next time code is regenerated.
+ * If you need to make any customizations, please use subclass.
+ */
+public abstract class _Department extends CayenneDataObject {
+
+    private static final long serialVersionUID = 1L; 
+
+    public static final String DEP_ID_PK_COLUMN = "dep_id";
+
+    public static final Property<String> NAME = Property.create("name", String.class);
+    public static final Property<List<Employee>> EMPLOYEES = Property.create("employees", List.class);
+
+    public void setName(String name) {
+        writeProperty("name", name);
+    }
+    public String getName() {
+        return (String)readProperty("name");
+    }
+
+    public void addToEmployees(Employee obj) {
+        addToManyTarget("employees", obj, true);
+    }
+    public void removeFromEmployees(Employee obj) {
+        removeToManyTarget("employees", obj, true);
+    }
+    @SuppressWarnings("unchecked")
+    public List<Employee> getEmployees() {
+        return (List<Employee>)readProperty("employees");
+    }
+
+
+}

linkrest/src/main/java/com/baeldung/cayenne/auto/_Employee.java

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+package com.baeldung.cayenne.auto;
+
+import org.apache.cayenne.CayenneDataObject;
+import org.apache.cayenne.exp.Property;
+
+import com.baeldung.cayenne.Department;
+
+/**
+ * Class _Employee was generated by Cayenne.
+ * It is probably a good idea to avoid changing this class manually,
+ * since it may be overwritten next time code is regenerated.
+ * If you need to make any customizations, please use subclass.
+ */
+public abstract class _Employee extends CayenneDataObject {
+
+    private static final long serialVersionUID = 1L; 
+
+    public static final String EMP_ID_PK_COLUMN = "emp_id";
+
+    public static final Property<String> NAME = Property.create("name", String.class);
+    public static final Property<Department> DEPARTMENT = Property.create("department", Department.class);
+
+    public void setName(String name) {
+        writeProperty("name", name);
+    }
+    public String getName() {
+        return (String)readProperty("name");
+    }
+
+    public void setDepartment(Department department) {
+        setToOneTarget("department", department, true);
+    }
+
+    public Department getDepartment() {
+        return (Department)readProperty("department");
+    }
+
+
+}