/*
    *    Copyright 2009-2021 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.apache.ibatis.binding;
  
  import java.lang.reflect.Method;
  import java.lang.reflect.Proxy;
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  
  import org.apache.ibatis.binding.MapperProxy.MapperMethodInvoker;
  import org.apache.ibatis.session.SqlSession;
  
  /**
   * @author Lasse Voss
   */
  public class MapperProxyFactory<T> {
  
    private final Class<T> mapperInterface;
    private final Map<Method, MapperMethodInvoker> methodCache = new ConcurrentHashMap<>();
  
    public MapperProxyFactory(Class<T> mapperInterface) {
      this.mapperInterface = mapperInterface;
    }
  
    public Class<T> getMapperInterface() {
      return mapperInterface;
    }
  
    public Map<Method, MapperMethodInvoker> getMethodCache() {
      return methodCache;
    }
  
    @SuppressWarnings("unchecked")
    protected T newInstance(MapperProxy<T> mapperProxy) {
      return (T) Proxy.newProxyInstance(mapperInterface.getClassLoader(), new Class[] { mapperInterface }, mapperProxy);
    }
  
    public T newInstance(SqlSession sqlSession) {
      final MapperProxy<T> mapperProxy = new MapperProxy<>(sqlSession, mapperInterface, methodCache);
      return newInstance(mapperProxy);
    }
  
  }