Merge pull request #18 from vsgamb/GuiceProxyClass

Fix for Guice Wrapped Class

Author: bageshwar

pom.xml

@@ -107,7 +107,7 @@
     </build>
 
     <properties>
-        <revision>0.1.6</revision>
+        <revision>0.1.7</revision>
         <guava.version>19.0</guava.version>
         <guice.version>5.1.0</guice.version>
     </properties>

tef-impl/src/main/java/flipkart/tef/bizlogics/DataAdapterBizlogic.java

@@ -16,6 +16,7 @@
 
 package flipkart.tef.bizlogics;
 
+import com.google.inject.internal.BytecodeGen;
 import flipkart.tef.annotations.EmitData;
 import flipkart.tef.annotations.InjectData;
 import flipkart.tef.exception.TefExecutionException;
@@ -80,6 +81,13 @@ private Map<DataAdapterKey<?>, Field> buildCacheOfMutableFields() {
 
     @SuppressWarnings("rawtypes")
     public static String getEmittedDataName(Class<? extends DataAdapterBizlogic> clazz) {
+        // If method interceptor is applied via guice AOP , then guice creates an instance wrapped by EnhancerByGuice
+        // and then it hinders any annotation present on the superclass. So extracting superclass to find the annotations.
+        if (clazz.getName().contains(BytecodeGen.ENHANCER_BY_GUICE_MARKER)) {
+            // If clazz is a guice proxy clazz , then Its super class will always be of type Class<? extends DataAdapterBizlogic>
+            clazz = (Class<? extends DataAdapterBizlogic>) clazz.getSuperclass();
+        }
+
         EmitData emitData = clazz.getAnnotation(EmitData.class);
         if (emitData != null) {
             return emitData.name();

tef-impl/src/test/java/flipkart/tef/bizlogics/DataAdapterBizlogicTest.java

@@ -0,0 +1,105 @@
+/*
+ *Copyright [2024] [The Original Author]
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package flipkart.tef.bizlogics;
+
+import com.google.inject.AbstractModule;
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import com.google.inject.internal.BytecodeGen;
+import com.google.inject.matcher.Matchers;
+import flipkart.tef.annotations.EmitData;
+import org.aopalliance.intercept.MethodInterceptor;
+import org.aopalliance.intercept.MethodInvocation;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class DataAdapterBizlogicTest {
+
+    @EmitData(name = "testData")
+    static class TestDataAdapterBizlogic extends DataAdapterBizlogic<Object> {
+        @Override
+        public Object adapt(TefContext tefContext) {
+            return null;
+        }
+    }
+
+    static class TestDataAdapterBizlogic1 extends DataAdapterBizlogic<Object> {
+        @Override
+        public Object adapt(TefContext tefContext) {
+            return null;
+        }
+    }
+
+    @Test
+    public void testGetEmittedDataName() {
+        //setup
+        Class<? extends DataAdapterBizlogic> clazz = TestDataAdapterBizlogic.class;
+
+        //test
+        String emittedDataName = DataAdapterBizlogic.getEmittedDataName(clazz);
+
+        //validate
+        assertEquals("testData", emittedDataName);
+    }
+
+    @Test
+    public void testGetEmittedDataNameForAnnotationAbsence() {
+        //setup
+        Class<? extends DataAdapterBizlogic> clazz = TestDataAdapterBizlogic1.class;
+
+        //test
+        String emittedDataName = DataAdapterBizlogic.getEmittedDataName(clazz);
+
+        //validate
+        assertEquals("", emittedDataName);
+    }
+
+    @Test
+    public void testGetEmittedDataNameWithGuiceProxy() {
+        // setup
+        Injector injector = Guice.createInjector(new GuiceModule());
+        TestDataAdapterBizlogic dataAdapterBizlogic = injector.getInstance(TestDataAdapterBizlogic.class);
+
+        // test
+        String emittedDataName = DataAdapterBizlogic.getEmittedDataName(dataAdapterBizlogic.getClass());
+
+        // validate
+        assertTrue(dataAdapterBizlogic.getClass().getName().contains(BytecodeGen.ENHANCER_BY_GUICE_MARKER));
+        assertEquals("testData", emittedDataName);
+    }
+
+    class GuiceModule extends AbstractModule {
+        @Override
+        protected void configure() {
+            bindInterceptor(
+                    Matchers.subclassesOf(TestDataAdapterBizlogic.class),
+                    Matchers.any(),
+                    new CustomInterceptor()
+            );
+        }
+    }
+
+    public class CustomInterceptor implements MethodInterceptor {
+        @Override
+        public Object invoke(MethodInvocation invocation) throws Throwable {
+            // Proceed with the actual method invocation
+            return invocation.proceed();
+        }
+    }
+}