From 41ad30313ab2c454350b5accdee531dba80e7ea9 Mon Sep 17 00:00:00 2001
From: Raghav Jha <raghav.jha@inmobi.com>
Date: Tue, 6 Feb 2018 00:17:30 +0530
Subject: [PATCH] Evaluation Article

---
 .../baeldung/spring/di/DepartmentService.java | 10 ++++++
 ...loyeeControllerWithConstructorBasedDI.java | 19 ++++++++++
 .../EmployeeControllerWithSetterBasedDI.java  | 18 ++++++++++
 spring-core/src/main/resources/spring-di.xml  |  7 ++++
 .../spring/di/DepdencyInjectionUnitTest.java  | 35 +++++++++++++++++++
 5 files changed, 89 insertions(+)
 create mode 100644 spring-core/src/main/java/com/baeldung/spring/di/DepartmentService.java
 create mode 100644 spring-core/src/main/java/com/baeldung/spring/di/EmployeeControllerWithConstructorBasedDI.java
 create mode 100644 spring-core/src/main/java/com/baeldung/spring/di/EmployeeControllerWithSetterBasedDI.java
 create mode 100644 spring-core/src/main/resources/spring-di.xml
 create mode 100644 spring-core/src/test/java/com/baeldung/spring/di/DepdencyInjectionUnitTest.java

diff --git a/spring-core/src/main/java/com/baeldung/spring/di/DepartmentService.java b/spring-core/src/main/java/com/baeldung/spring/di/DepartmentService.java
new file mode 100644
index 0000000000..f087301f85
--- /dev/null
+++ b/spring-core/src/main/java/com/baeldung/spring/di/DepartmentService.java
@@ -0,0 +1,10 @@
+package com.baeldung.spring.di;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class DepartmentService {
+    public String getDepartment() {
+        return "Management";
+    }
+}
diff --git a/spring-core/src/main/java/com/baeldung/spring/di/EmployeeControllerWithConstructorBasedDI.java b/spring-core/src/main/java/com/baeldung/spring/di/EmployeeControllerWithConstructorBasedDI.java
new file mode 100644
index 0000000000..a0b07fb32c
--- /dev/null
+++ b/spring-core/src/main/java/com/baeldung/spring/di/EmployeeControllerWithConstructorBasedDI.java
@@ -0,0 +1,19 @@
+package com.baeldung.spring.di;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component("employeeControllerWithConstructorBasedDI")
+public class EmployeeControllerWithConstructorBasedDI {
+
+    private DepartmentService departmentService;
+
+    @Autowired
+    public EmployeeControllerWithConstructorBasedDI(DepartmentService departmentService) {
+        this.departmentService = departmentService;
+    }
+
+    public String getEmployeeDetails() {
+        return "Employee: A, Department: " + departmentService.getDepartment();
+    }
+}
diff --git a/spring-core/src/main/java/com/baeldung/spring/di/EmployeeControllerWithSetterBasedDI.java b/spring-core/src/main/java/com/baeldung/spring/di/EmployeeControllerWithSetterBasedDI.java
new file mode 100644
index 0000000000..bb3d05c2d4
--- /dev/null
+++ b/spring-core/src/main/java/com/baeldung/spring/di/EmployeeControllerWithSetterBasedDI.java
@@ -0,0 +1,18 @@
+package com.baeldung.spring.di;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component("employeeControllerWithSetterBasedDI")
+public class EmployeeControllerWithSetterBasedDI {
+    private DepartmentService departmentService;
+
+    @Autowired
+    public void setDepartmentService(DepartmentService departmentService) {
+        this.departmentService = departmentService;
+    }
+
+    public String getEmployeeDetails() {
+        return "Employee: A, Department: " + departmentService.getDepartment();
+    }
+}
diff --git a/spring-core/src/main/resources/spring-di.xml b/spring-core/src/main/resources/spring-di.xml
new file mode 100644
index 0000000000..174285a402
--- /dev/null
+++ b/spring-core/src/main/resources/spring-di.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xmlns:context="http://www.springframework.org/schema/context"
+       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
+<context:component-scan base-package="com.baeldung.spring.di"/>
+</beans>
\ No newline at end of file
diff --git a/spring-core/src/test/java/com/baeldung/spring/di/DepdencyInjectionUnitTest.java b/spring-core/src/test/java/com/baeldung/spring/di/DepdencyInjectionUnitTest.java
new file mode 100644
index 0000000000..7d1aed2dfa
--- /dev/null
+++ b/spring-core/src/test/java/com/baeldung/spring/di/DepdencyInjectionUnitTest.java
@@ -0,0 +1,35 @@
+package com.baeldung.spring.di;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import static org.junit.Assert.assertEquals;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+public class DepdencyInjectionUnitTest {
+
+    private ApplicationContext context;
+
+    @Before
+    public  void oneTimeSetup() {
+        context = new ClassPathXmlApplicationContext("spring-di.xml");
+    }
+
+    @Test
+    public void givenConstructorBasedDI_ThenDependencyValid() {
+        EmployeeControllerWithConstructorBasedDI employee = (EmployeeControllerWithConstructorBasedDI) context
+                                                            .getBean("employeeControllerWithConstructorBasedDI");
+        assertEquals("Employee: A, Department: Management", employee.getEmployeeDetails());
+    }
+
+    @Test
+    public void givenSetterBasedDI_ThenDependencyValid() {
+        EmployeeControllerWithSetterBasedDI employee = (EmployeeControllerWithSetterBasedDI) context
+                                                        .getBean("employeeControllerWithSetterBasedDI");
+        assertEquals("Employee: A, Department: Management", employee.getEmployeeDetails());
+    }
+}