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/**
 *    Copyright 2013-2017 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
 *
 *       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 org.mybatis.cdi;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import javax.enterprise.context.spi.CreationalContext;

import org.apache.ibatis.session.SqlSessionFactory;

/**
 *
 * @author Frank D. Martinez [mnesarco]
 */
public class SerializableMapperProxy implements InvocationHandler, Serializable {

  private static final long serialVersionUID = 1L;

  private transient Object mapper;

  private final MyBatisBean bean;

  private final CreationalContext creationalContext;

  public SerializableMapperProxy(MyBatisBean bean, CreationalContext creationalContext) {
    this.bean = bean;
    this.creationalContext = creationalContext;
    this.mapper = getMapper();
  }

  @Override
  public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
    try {
      return method.invoke(this.mapper, args);
    } catch (InvocationTargetException e) {
      throw e.getTargetException();
    }
  }

  private Object getMapper() {
    SqlSessionFactory factory = CDIUtils.findSqlSessionFactory(this.bean.sqlSessionFactoryName, this.bean.qualifiers, this.creationalContext);
    return CDIUtils.getRegistry(this.creationalContext).getManager(factory).getMapper(this.bean.type);
  }

  private void readObject(ObjectInputStream is) throws ClassNotFoundException, IOException {
    is.defaultReadObject();
    this.mapper = getMapper();
  }

  private void writeObject(ObjectOutputStream os) throws IOException {
    os.defaultWriteObject();
  }

}