AopUtils.getMostSpecificMethod exposes dynamic proxy class methods

Includes efficient canApply check for IntroductionAwareMethodMatcher.

Issue: SPR-16757

spring-tx/src/test/java/org/springframework/transaction/annotation/AnnotationTransactionInterceptorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -167,10 +167,13 @@ public class AnnotationTransactionInterceptorTests {
 
 		proxy.doSomething();
 		assertGetTransactionAndCommitCount(4);
+
+		proxy.doSomethingDefault();
+		assertGetTransactionAndCommitCount(5);
 	}
 
 	@Test
-	public void crossClassInterfaceMethodLevelOnJdkProxy() throws Exception {
+	public void crossClassInterfaceMethodLevelOnJdkProxy() {
 		ProxyFactory proxyFactory = new ProxyFactory();
 		proxyFactory.setTarget(new SomeServiceImpl());
 		proxyFactory.addInterface(SomeService.class);
@@ -189,7 +192,7 @@ public class AnnotationTransactionInterceptorTests {
 	}
 
 	@Test
-	public void crossClassInterfaceOnJdkProxy() throws Exception {
+	public void crossClassInterfaceOnJdkProxy() {
 		ProxyFactory proxyFactory = new ProxyFactory();
 		proxyFactory.setTarget(new OtherServiceImpl());
 		proxyFactory.addInterface(OtherService.class);
@@ -201,6 +204,64 @@ public class AnnotationTransactionInterceptorTests {
 		assertGetTransactionAndCommitCount(1);
 	}
 
+	@Test
+	public void withInterfaceOnTargetJdkProxy() {
+		ProxyFactory targetFactory = new ProxyFactory();
+		targetFactory.setTarget(new TestWithInterfaceImpl());
+		targetFactory.addInterface(TestWithInterface.class);
+
+		ProxyFactory proxyFactory = new ProxyFactory();
+		proxyFactory.setTarget(targetFactory.getProxy());
+		proxyFactory.addInterface(TestWithInterface.class);
+		proxyFactory.addAdvice(this.ti);
+
+		TestWithInterface proxy = (TestWithInterface) proxyFactory.getProxy();
+
+		proxy.doSomething();
+		assertGetTransactionAndCommitCount(1);
+
+		proxy.doSomethingElse();
+		assertGetTransactionAndCommitCount(2);
+
+		proxy.doSomethingElse();
+		assertGetTransactionAndCommitCount(3);
+
+		proxy.doSomething();
+		assertGetTransactionAndCommitCount(4);
+
+		proxy.doSomethingDefault();
+		assertGetTransactionAndCommitCount(5);
+	}
+
+	@Test
+	public void withInterfaceOnTargetCglibProxy() {
+		ProxyFactory targetFactory = new ProxyFactory();
+		targetFactory.setTarget(new TestWithInterfaceImpl());
+		targetFactory.setProxyTargetClass(true);
+
+		ProxyFactory proxyFactory = new ProxyFactory();
+		proxyFactory.setTarget(targetFactory.getProxy());
+		proxyFactory.addInterface(TestWithInterface.class);
+		proxyFactory.addAdvice(this.ti);
+
+		TestWithInterface proxy = (TestWithInterface) proxyFactory.getProxy();
+
+		proxy.doSomething();
+		assertGetTransactionAndCommitCount(1);
+
+		proxy.doSomethingElse();
+		assertGetTransactionAndCommitCount(2);
+
+		proxy.doSomethingElse();
+		assertGetTransactionAndCommitCount(3);
+
+		proxy.doSomething();
+		assertGetTransactionAndCommitCount(4);
+
+		proxy.doSomethingDefault();
+		assertGetTransactionAndCommitCount(5);
+	}
+
 	private void assertGetTransactionAndCommitCount(int expectedCount) {
 		assertEquals(expectedCount, this.ptm.begun);
 		assertEquals(expectedCount, this.ptm.commits);
@@ -309,13 +370,22 @@ public class AnnotationTransactionInterceptorTests {
 	}
 
 
-	@Transactional
-	public static interface TestWithInterface {
+	public interface BaseInterface {
 
-		public void doSomething();
+		void doSomething();
+	}
+
+
+	@Transactional
+	public interface TestWithInterface extends BaseInterface {
 
 		@Transactional(readOnly = true)
-		public void doSomethingElse();
+		void doSomethingElse();
+
+		default void doSomethingDefault() {
+			assertTrue(TransactionSynchronizationManager.isActualTransactionActive());
+			assertFalse(TransactionSynchronizationManager.isCurrentTransactionReadOnly());
+		}
 	}
 
 
@@ -335,7 +405,7 @@ public class AnnotationTransactionInterceptorTests {
 	}
 
 
-	public static interface SomeService {
+	public interface SomeService {
 
 		void foo();