Mybatis源码-CglibProxyFactory(cglib工厂类)

最新推荐文章于 2024-06-11 15:23:51 发布

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最新推荐文章于 2024-06-11 15:23:51 发布 · 621 阅读

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文章标签：

#cglib #CglibProxyFactory #延迟加载 #loader #proxy

Cglib 代理工厂类，为了实现延迟加载属性

1、源码（Cglib代理工厂类）

import java.lang.reflect.Method;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import net.sf.cglib.proxy.Callback;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

import org.apache.ibatis.executor.loader.AbstractEnhancedDeserializationProxy;
import org.apache.ibatis.executor.loader.AbstractSerialStateHolder;
import org.apache.ibatis.executor.loader.ProxyFactory;
import org.apache.ibatis.executor.loader.ResultLoaderMap;
import org.apache.ibatis.executor.loader.WriteReplaceInterface;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.logging.Log;
import org.apache.ibatis.logging.LogFactory;
import org.apache.ibatis.reflection.ExceptionUtil;
import org.apache.ibatis.reflection.factory.ObjectFactory;
import org.apache.ibatis.reflection.property.PropertyCopier;
import org.apache.ibatis.reflection.property.PropertyNamer;
import org.apache.ibatis.session.Configuration;

/**
 * cglib代理工厂类，实现延迟加载属性
 * @author Clinton Begin
 */
public class CglibProxyFactory implements ProxyFactory {
   
   

  /**
   * finalize方法
   */
  private static final String FINALIZE_METHOD = "finalize";
  /**
   * writeReplace方法
   */
  private static final String WRITE_REPLACE_METHOD = "writeReplace";

  /**
   * 加载Enhancer，这个是Cglib的入口
   */
  public CglibProxyFactory() {
   
   
    try {
   
   
      Resources.classForName("net.sf.cglib.proxy.Enhancer");
    } catch (Throwable e) {
   
   
      throw new IllegalStateException("Cannot enable lazy loading because CGLIB is not available. Add CGLIB to your classpath.", e);
    }
  }

  /**
   * 创建代理对象
   * @param target 目标对象
   * @param lazyLoader 延迟加载器
   * @param configuration 配置类
   * @param objectFactory 对象工厂
   * @param constructorArgTypes 构造函数类型[]
   * @param constructorArgs  构造函数的值[]
   * @return
   */
  @Override
  public Object createProxy(Object target, ResultLoaderMap lazyLoader, Configuration configuration, ObjectFactory objectFactory, List<Class<?>> constructorArgTypes, List<Object> constructorArgs) {