~~~ /** * Copyright 2009-2019 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; //处理Mapper方法映射 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; } //管理MapperProxy的实例化 @SuppressWarnings("unchecked") protected T newInstance(MapperProxy<T> mapperProxy) { return (T) Proxy.newProxyInstance(mapperInterface.getClassLoader(), new Class[] { mapperInterface }, mapperProxy); } //管理MapperProxy （Mapper代理）的实例化 public T newInstance(SqlSession sqlSession) { final MapperProxy<T> mapperProxy = new MapperProxy<>(sqlSession, mapperInterface, methodCache); return newInstance(mapperProxy); } } ~~~