java 深拷贝工具类 dozer

package com.wafersystems.mina.util;


import java.util.Collection;
import java.util.List;


import org.dozer.DozerBeanMapper;


import com.google.common.collect.Lists;


/**
 * 简单封装Dozer, 实现深度转换Bean<->Bean的Mapper.实现:
 * 
 * 1. 持有Mapper的单例. 
 * 2. 返回值类型转换.
 * 3. 批量转换Collection中的所有对象.
 * 4. 区分创建新的B对象与将对象A值复制到已存在的B对象两种函数.
 * 
 * @author wangyun
 */
public final class BeanMapperUtils {


private BeanMapperUtils() {
}


/**
* 持有Dozer单例, 避免重复创建DozerMapper消耗资源.
*/
private static DozerBeanMapper dozer = new DozerBeanMapper();


/**
* 基于Dozer转换对象的类型.
*/
public static T map(Object source, Class destinationClass) {
return dozer.map(source, destinationClass);
}


/**
* 基于Dozer转换Collection中对象的类型.
*/
public static List mapList(Collection sourceList, Class destinationClass) {
List destinationList = Lists.newArrayList();
for (Object sourceObject : sourceList) {
T destinationObject = dozer.map(sourceObject, destinationClass);
destinationList.add(destinationObject);
}
return destinationList;
}


/**
* 基于Dozer将对象A的值拷贝到对象B中.
*/
public static void copy(Object source, Object destinationObject) {
dozer.map(source, destinationObject);
}
}