/*
* Copyright 2002-2015 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
*
* https://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.aop.framework;
import java.io.Serializable;
import java.lang.reflect.Proxy;
import org.springframework.aop.SpringProxy;
Default AopProxyFactory
implementation, creating either a CGLIB proxy or a JDK dynamic proxy. Creates a CGLIB proxy if one the following is true for a given AdvisedSupport
instance:
- the
optimize
flag is set - the
proxyTargetClass
flag is set - no proxy interfaces have been specified
In general, specify proxyTargetClass
to enforce a CGLIB proxy, or specify one or more interfaces to use a JDK dynamic proxy.
Author: Rod Johnson, Juergen Hoeller, Sebastien Deleuze See Also: Since: 12.03.2004
/**
* Default {@link AopProxyFactory} implementation, creating either a CGLIB proxy
* or a JDK dynamic proxy.
*
* <p>Creates a CGLIB proxy if one the following is true for a given
* {@link AdvisedSupport} instance:
* <ul>
* <li>the {@code optimize} flag is set
* <li>the {@code proxyTargetClass} flag is set
* <li>no proxy interfaces have been specified
* </ul>
*
* <p>In general, specify {@code proxyTargetClass} to enforce a CGLIB proxy,
* or specify one or more interfaces to use a JDK dynamic proxy.
*
* @author Rod Johnson
* @author Juergen Hoeller
* @author Sebastien Deleuze
* @since 12.03.2004
* @see AdvisedSupport#setOptimize
* @see AdvisedSupport#setProxyTargetClass
* @see AdvisedSupport#setInterfaces
*/
@SuppressWarnings("serial")
public class DefaultAopProxyFactory implements AopProxyFactory, Serializable {
Whether this environment lives within a native image. Exposed as a private static field rather than in a NativeImageDetector.inNativeImage()
static method due to https://github.com/oracle/graal/issues/2594. See Also:
/**
* Whether this environment lives within a native image.
* Exposed as a private static field rather than in a {@code NativeImageDetector.inNativeImage()} static method due to https://github.com/oracle/graal/issues/2594.
* @see <a href="https://github.com/oracle/graal/blob/master/sdk/src/org.graalvm.nativeimage/src/org/graalvm/nativeimage/ImageInfo.java">ImageInfo.java</a>
*/
private static final boolean IN_NATIVE_IMAGE = (System.getProperty("org.graalvm.nativeimage.imagecode") != null);
@Override
public AopProxy createAopProxy(AdvisedSupport config) throws AopConfigException {
if (!IN_NATIVE_IMAGE &&
(config.isOptimize() || config.isProxyTargetClass() || hasNoUserSuppliedProxyInterfaces(config))) {
Class<?> targetClass = config.getTargetClass();
if (targetClass == null) {
throw new AopConfigException("TargetSource cannot determine target class: " +
"Either an interface or a target is required for proxy creation.");
}
if (targetClass.isInterface() || Proxy.isProxyClass(targetClass)) {
return new JdkDynamicAopProxy(config);
}
return new ObjenesisCglibAopProxy(config);
}
else {
return new JdkDynamicAopProxy(config);
}
}
Determine whether the supplied AdvisedSupport
has only the SpringProxy
interface specified (or no proxy interfaces specified at all). /**
* Determine whether the supplied {@link AdvisedSupport} has only the
* {@link org.springframework.aop.SpringProxy} interface specified
* (or no proxy interfaces specified at all).
*/
private boolean hasNoUserSuppliedProxyInterfaces(AdvisedSupport config) {
Class<?>[] ifcs = config.getProxiedInterfaces();
return (ifcs.length == 0 || (ifcs.length == 1 && SpringProxy.class.isAssignableFrom(ifcs[0])));
}
}