Added Marker Annotation example (thombergs#148)

syedaf · web-flow · commit c593aae6e11a · 2022-03-10T06:44:45.000+11:00
Added Marker Annotation example
diff --git a/core-java/annotation-processing/introduction-to-annotations/src/main/java/com/reflectoring/CSV.java b/core-java/annotation-processing/introduction-to-annotations/src/main/java/com/reflectoring/CSV.java
@@ -0,0 +1,11 @@
+package com.reflectoring;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface CSV {
+}
diff --git a/core-java/annotation-processing/introduction-to-annotations/src/main/java/com/reflectoring/TestMarkerAnnotation.java b/core-java/annotation-processing/introduction-to-annotations/src/main/java/com/reflectoring/TestMarkerAnnotation.java
@@ -0,0 +1,16 @@
+package com.reflectoring;
+
+public class TestMarkerAnnotation {
+
+    public static void main(String[] args) {
+
+        XYZClient client = new XYZClient();
+        Class clientClass = client.getClass();
+
+        if (clientClass.isAnnotationPresent(CSV.class)){
+            System.out.println("Write client data to CSV.");
+        } else {
+            System.out.println("Write client data to Excel file.");
+        }
+    }
+}
diff --git a/core-java/annotation-processing/introduction-to-annotations/src/main/java/com/reflectoring/XYZClient.java b/core-java/annotation-processing/introduction-to-annotations/src/main/java/com/reflectoring/XYZClient.java
@@ -0,0 +1,6 @@
+package com.reflectoring;
+
+@CSV
+public class XYZClient {
+
+}

-Original file line number
+Diff line change
@@ @@ -0,0 +1,6 @@ @@
 +package com.reflectoring;
++
 +@CSV
 +public class XYZClient {
++
 +}