Deprecate/move CGLIB methods AopUtils=>ClassUtils

isCglibProxy* methods in AopUtils are useful in lower-level modules,
i.e. those that cannot depend on .aop.  Therefore copied these methods
to ClassUtils; deprecated the existing ones in AopUtils and now
delegating to the new location; switched all usage of
AopUtils#isCglibProxy* within the framework to use
ClassUtils#isCglibProxy* instead.

org.springframework.aop/src/main/java/org/springframework/aop/framework/Cglib2AopProxy.java

@@ -35,11 +35,11 @@ import net.sf.cglib.proxy.MethodInterceptor;
 import net.sf.cglib.proxy.MethodProxy;
 import net.sf.cglib.proxy.NoOp;
 import net.sf.cglib.transform.impl.UndeclaredThrowableStrategy;
+
 import org.aopalliance.aop.Advice;
 import org.aopalliance.intercept.MethodInvocation;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-
 import org.springframework.aop.Advisor;
 import org.springframework.aop.PointcutAdvisor;
 import org.springframework.aop.RawTargetAccess;
@@ -47,6 +47,7 @@ import org.springframework.aop.TargetSource;
 import org.springframework.aop.support.AopUtils;
 import org.springframework.core.SmartClassLoader;
 import org.springframework.util.Assert;
+import org.springframework.util.ClassUtils;
 import org.springframework.util.ObjectUtils;
 
 /**
@@ -155,7 +156,7 @@ final class Cglib2AopProxy implements AopProxy, Serializable {
 			Assert.state(rootClass != null, "Target class must be available for creating a CGLIB proxy");
 
 			Class proxySuperClass = rootClass;
-			if (AopUtils.isCglibProxyClass(rootClass)) {
+			if (ClassUtils.isCglibProxyClass(rootClass)) {
 				proxySuperClass = rootClass.getSuperclass();
 				Class[] additionalInterfaces = rootClass.getInterfaces();
 				for (Class additionalInterface : additionalInterfaces) {

org.springframework.aop/src/main/java/org/springframework/aop/support/AopUtils.java

@@ -63,7 +63,7 @@ public abstract class AopUtils {
 	 */
 	public static boolean isAopProxy(Object object) {
 		return (object instanceof SpringProxy &&
-				(Proxy.isProxyClass(object.getClass()) || isCglibProxyClass(object.getClass())));
+				(Proxy.isProxyClass(object.getClass()) || ClassUtils.isCglibProxyClass(object.getClass())));
 	}
 
 	/**
@@ -76,27 +76,34 @@ public abstract class AopUtils {
 	}
 
 	/**
-	 * Check whether the given object is a CGLIB proxy.
+	 * Check whether the given object is a CGLIB proxy. Goes beyond the implementation
+	 * in {@link ClassUtils#isCglibProxy(Object)} by checking also to see if the given
+	 * object is an instance of {@link SpringProxy}.
 	 * @param object the object to check
+	 * @see ClassUtils#isCglibProxy(Object)
 	 */
 	public static boolean isCglibProxy(Object object) {
-		return (object instanceof SpringProxy && isCglibProxyClass(object.getClass()));
+		return (object instanceof SpringProxy && ClassUtils.isCglibProxy(object));
 	}
 
 	/**
 	 * Check whether the specified class is a CGLIB-generated class.
 	 * @param clazz the class to check
+	 * @deprecated as of Spring 3.1 in favor of {@link ClassUtils#isCglibProxyClass(Class)}
 	 */
+	@Deprecated
 	public static boolean isCglibProxyClass(Class<?> clazz) {
-		return (clazz != null && isCglibProxyClassName(clazz.getName()));
+		return ClassUtils.isCglibProxyClass(clazz);
 	}
 
 	/**
 	 * Check whether the specified class name is a CGLIB-generated class.
 	 * @param className the class name to check
+	 * @deprecated as of Spring 3.1 in favor of {@link ClassUtils#isCglibProxyClassName(String)}
 	 */
+	@Deprecated
 	public static boolean isCglibProxyClassName(String className) {
-		return (className != null && className.contains(ClassUtils.CGLIB_CLASS_SEPARATOR));
+		return ClassUtils.isCglibProxyClassName(className);
 	}
 
 	/**

org.springframework.context/src/test/java/org/springframework/context/annotation/configuration/ImportedConfigurationClassEnhancementTests.java

@@ -21,7 +21,6 @@ import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 
 import org.junit.Test;
-import org.springframework.aop.support.AopUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.parsing.BeanDefinitionParsingException;
 import org.springframework.context.ApplicationContext;
@@ -29,6 +28,7 @@ import org.springframework.context.annotation.AnnotationConfigApplicationContext
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
+import org.springframework.util.ClassUtils;
 
 import test.beans.TestBean;
 
@@ -54,7 +54,7 @@ public class ImportedConfigurationClassEnhancementTests {
 		ApplicationContext ctx = new AnnotationConfigApplicationContext(configClasses);
 		Config config = ctx.getBean(Config.class);
 		assertTrue("autowired config class has not been enhanced",
-				AopUtils.isCglibProxyClass(config.autowiredConfig.getClass()));
+				ClassUtils.isCglibProxy(config.autowiredConfig));
 	}
 	
 	

org.springframework.context/src/test/java/org/springframework/context/annotation/configuration/Spr7167Tests.java

@@ -16,11 +16,11 @@
 
 package org.springframework.context.annotation.configuration;
 
-import static org.hamcrest.CoreMatchers.*;
-import static org.junit.Assert.*;
-import org.junit.Test;
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
 
-import org.springframework.aop.support.AopUtils;
+import org.junit.Test;
 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
@@ -29,6 +29,7 @@ import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.util.ClassUtils;
 
 public class Spr7167Tests {
 	@Test
@@ -40,7 +41,7 @@ public class Spr7167Tests {
 				equalTo("post processed by MyPostProcessor"));
 
 		MyConfig config = ctx.getBean(MyConfig.class);
-		assertTrue("Config class was not enhanced", AopUtils.isCglibProxyClass(config.getClass()));
+		assertTrue("Config class was not enhanced", ClassUtils.isCglibProxy(config));
 	}
 }
 

org.springframework.core/src/main/java/org/springframework/util/ClassUtils.java

@@ -1083,4 +1083,30 @@ public abstract class ClassUtils {
 		}
 	}
 
+	/**
+	 * Check whether the given object is a CGLIB proxy.
+	 * @param object the object to check
+	 * @see org.springframework.aop.support.AopUtils#isCglibProxy(Object)
+	 */
+	public static boolean isCglibProxy(Object object) {
+		return ClassUtils.isCglibProxyClass(object.getClass());
+	}
+
+	/**
+	 * Check whether the specified class is a CGLIB-generated class.
+	 * @param clazz the class to check
+	 */
+	public static boolean isCglibProxyClass(Class<?> clazz) {
+		return (clazz != null && isCglibProxyClassName(clazz.getName()));
+	}
+
+	/**
+	 * Check whether the specified class name is a CGLIB-generated class.
+	 * @param className the class name to check
+	 */
+	public static boolean isCglibProxyClassName(String className) {
+		return (className != null && className.contains(CGLIB_CLASS_SEPARATOR));
+	}
+
+
 }