Distinguish between different bridge method types

Add BridgeMethodResolver#isJava6VisibilityBridgeMethodPair to
distinguish between (a) bridge methods introduced in Java 6 to
compensate for inheriting public methods from non-public superclasses
and (b) bridge methods that have existed since Java 5 to accommodate
return type covariance and generic parameters.

In the former case, annotations should be looked up from the original
bridged method (SPR-7900).  In the latter, the annotation should be
looked up against the bridge method itself (SPR-8660).

As noted in the Javadoc for the new method, see
http://stas-blogspot.blogspot.com/2010/03/java-bridge-methods-explained.html
for a useful description of the various types of bridge methods, as
well as http://bugs.sun.com/view_bug.do?bug_id=6342411, the bug fixed in
Java 6 resulting in the introduction of 'visibility bridge methods'.

Issue: SPR-8660, SPR-7900

org.springframework.context/src/test/java/org/springframework/beans/factory/annotation/BridgeMethodAutowiringTests.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2002-2011 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.
+ * 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 org.springframework.beans.factory.annotation;
+
+import static org.junit.Assert.assertNotNull;
+
+import javax.inject.Inject;
+import javax.inject.Named;
+
+import org.junit.Test;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.stereotype.Component;
+
+public class BridgeMethodAutowiringTests {
+
+	@Test
+	public void SPR_8434() {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
+		ctx.register(UserServiceImpl.class, Foo.class);
+		ctx.refresh();
+		assertNotNull(ctx.getBean(UserServiceImpl.class).object);
+	}
+
+}
+
+
+abstract class GenericServiceImpl<D extends Object> {
+
+	public abstract void setObject(D object);
+
+}
+
+
+class UserServiceImpl extends GenericServiceImpl<Foo> {
+
+	protected Foo object;
+
+	@Inject
+	@Named("userObject")
+	public void setObject(Foo object) {
+		this.object = object;
+	}
+}
+
+@Component("userObject")
+class Foo { }
+