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/*
* Copyright 2013-2014 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.security.oauth2.common.util;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import org.springframework.beans.factory.ObjectFactory;
/**
*
* @deprecated See the OAuth 2.0 Migration Guide for Spring Security 5.
*
* @author Dave Syer
*
*/
@Deprecated
public class ProxyCreator {
@SuppressWarnings("unchecked")
public static T getProxy(Class type, ObjectFactory factory) {
return (T) Proxy.newProxyInstance(ProxyCreator.class.getClassLoader(), new Class[] { type },
new LazyInvocationHandler(factory));
}
private static class LazyInvocationHandler implements InvocationHandler {
private T target;
private ObjectFactory factory;
public LazyInvocationHandler(ObjectFactory factory) {
this.factory = factory;
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
// Invocation on interface coming in...
if (method.getName().equals("equals")) {
return (proxy == args[0]);
}
else if (method.getName().equals("hashCode")) {
return System.identityHashCode(proxy);
}
try {
return method.invoke(getTarget(method), args);
}
catch (InvocationTargetException ex) {
throw ex.getTargetException();
}
}
private Object getTarget(Method method) {
if (target == null) {
target = factory.getObject();
}
return target;
}
}
}