From beb13babc92a40fa394d1a25b995006acd8ef16e Mon Sep 17 00:00:00 2001
From: haerong22 <haerong22@naver.com>
Date: Mon, 15 Nov 2021 23:49:03 +0900
Subject: [PATCH] spring core proxy : reflection

---
 .../proxy/jdkdynamic/ReflectionTest.java      | 78 +++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 spring-core/proxy/src/test/java/com/example/proxy/jdkdynamic/ReflectionTest.java

diff --git a/spring-core/proxy/src/test/java/com/example/proxy/jdkdynamic/ReflectionTest.java b/spring-core/proxy/src/test/java/com/example/proxy/jdkdynamic/ReflectionTest.java
new file mode 100644
index 00000000..c7ef5b9d
--- /dev/null
+++ b/spring-core/proxy/src/test/java/com/example/proxy/jdkdynamic/ReflectionTest.java
@@ -0,0 +1,78 @@
+package com.example.proxy.jdkdynamic;
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Method;
+
+@Slf4j
+public class ReflectionTest {
+
+    @Test
+    void reflection0() {
+        Hello target = new Hello();
+
+        //공통 로직1 시작
+        log.info("start");
+        String result1 = target.callA();
+        log.info("result={}", result1);
+        //공통 로직1 종료
+
+        //공통 로직2 시작
+        log.info("start");
+        String result2 = target.callB();
+        log.info("result={}", result2);
+        //공통 로직2 종료
+    }
+
+    @Test
+    void reflection1() throws Exception {
+        //클래스 정보
+        Class<?> classHello = Class.forName("com.example.proxy.jdkdynamic.ReflectionTest$Hello");
+
+        Hello target = new Hello();
+        //callA 메서드 정보
+        Method methodCallA = classHello.getMethod("callA");
+        Object result1 = methodCallA.invoke(target);
+        log.info("result1={}", result1);
+
+        //callB 메서드 정보
+        Method methodCallB = classHello.getMethod("callB");
+        Object result2 = methodCallB.invoke(target);
+        log.info("result2={}", result2);
+    }
+
+    @Test
+    void reflection2() throws Exception {
+        //클래스 정보
+        Class<?> classHello = Class.forName("com.example.proxy.jdkdynamic.ReflectionTest$Hello");
+
+        Hello target = new Hello();
+        //callA 메서드 정보
+        Method methodCallA = classHello.getMethod("callA");
+        dynamicCall(methodCallA, target);
+
+        //callB 메서드 정보
+        Method methodCallB = classHello.getMethod("callB");
+        dynamicCall(methodCallB, target);
+    }
+
+    private void dynamicCall(Method method, Object target) throws Exception {
+        log.info("start");
+        Object result = method.invoke(target);
+        log.info("result={}", result);
+    }
+
+    @Slf4j
+    static class Hello {
+        public String callA() {
+            log.info("callA");
+            return "A";
+        }
+
+        public String callB() {
+            log.info("callB");
+            return "B";
+        }
+    }
+}