/*
 * MIT License
 *
 * Copyright 2017-2018 Sabre GLBL Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.sabre.oss.conf4j.spring.internal.factory.cglib;

import com.sabre.oss.conf4j.internal.config.DynamicConfiguration;
import com.sabre.oss.conf4j.internal.factory.ConfigurationInstanceCreator;
import com.sabre.oss.conf4j.internal.model.ConfigurationModel;
import org.springframework.cglib.proxy.Callback;
import org.springframework.cglib.proxy.Enhancer;


public class CglibDynamicConfigurationInstanceCreator implements ConfigurationInstanceCreator {
    @Override
    public <T> T createInstance(ConfigurationModel configurationModel, ClassLoader classLoader) {
        Class<?> configurationType = configurationModel.getConfigurationType();

        Enhancer enhancer = new Enhancer();
        enhancer.setClassLoader(classLoader);
        enhancer.setNamingPolicy(Conf4jNamingPolicy.INSTANCE);
        enhancer.setInterceptDuringConstruction(false);
        if (configurationType.isInterface()) {
            enhancer.setInterfaces(new Class<?>[]{configurationType, DynamicConfiguration.class});
        } else {
            enhancer.setSuperclass(configurationType);
            enhancer.setInterfaces(new Class<?>[]{DynamicConfiguration.class});
        }
        enhancer.setCallbackFilter(new ProxyCallbackFilter(configurationModel));
        enhancer.setCallbacks(new Callback[]{
                new CglibDynamicConfigurationMethodInterceptor(configurationModel),
                new SerializableNoOp()
        });

        @SuppressWarnings("unchecked")
        T instance = (T) enhancer.create();
        return instance;
    }
}