/*******************************************************************************
* /***
* *
* * Copyright 2013 Netflix, Inc.
* *
* * 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 com.netflix.paas.config.base;
import java.lang.reflect.Method;
import java.util.Map;
import org.apache.commons.configuration.AbstractConfiguration;
import com.google.common.base.Supplier;
import com.netflix.config.ConfigurationManager;
import com.netflix.config.DynamicPropertyFactory;
import com.netflix.paas.config.ConfigurationFactory;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.InvocationHandler;
public class CglibArchaeusConfigurationFactory implements ConfigurationFactory {
@Override
public <T> T get(Class<T> configClass) throws Exception {
return get(configClass,
DynamicPropertyFactory.getInstance(),
ConfigurationManager.getConfigInstance());
}
@SuppressWarnings({ "unchecked", "static-access" })
public <T> T get(Class<T> configClass, DynamicPropertyFactory propertyFactory, AbstractConfiguration configuration) throws Exception {
final Map<String, Supplier<?>> methods = ConfigurationProxyUtils.getMethodSuppliers(configClass, propertyFactory, configuration);
if (configClass.isInterface()) {
final Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(configClass);
enhancer.setCallback(new InvocationHandler() {
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
Supplier<?> supplier = (Supplier<?>)methods.get(method.getName());
return supplier.get();
}
});
return (T) enhancer.create();
}
else {
final Enhancer enhancer = new Enhancer();
final Object obj = (T) enhancer.create(configClass,
new net.sf.cglib.proxy.InvocationHandler() {
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
Supplier<?> supplier = (Supplier<?>)methods.get(method.getName());
if (supplier == null) {
return method.invoke(proxy, args);
}
return supplier.get();
}
});
ConfigurationProxyUtils.assignFieldValues(obj, configClass, propertyFactory, configuration);
return (T)obj;
}
}
}