JAVA装饰模式，封装父类，提供转换接口（三）_JAVA_编程开发_程序员俱乐部

http://numen06.iteye.com/blog/1428067
http://numen06.iteye.com/blog/1439763
上一篇文章已经将封装转换类，独立出来并作为一个类来进行。

在实际运用过程的中会遇到初始化的时候先后问题，所以将装换借口直接做成static只是作为工具类运用。

package com.wesley.framework.decoration;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.collections.MapUtils;

import com.wesley.framework.commen.ArrayUtil;
import com.wesley.framework.commen.ObjectUtil;
import com.wesley.framework.commen.reflect.ClassUtil;
import com.wesley.framework.commen.reflect.ReflectionUtils;

public class DecoratorFactory {

	@SuppressWarnings({ "unchecked"})
	public synchronized static <Model, Decor extends Decorator<Model>, SuperDec extends Decorator<?>> Decor exchange(
			SuperDec superDec, Class<Decor> clazz, String propertyName,
			String... params) {
		Decor decor = null;
		try {
			decor = ClassUtil.newInstance(clazz);
			Model model = (Model) ReflectionUtils.invokeGetterMethod(
					superDec.getModel(), propertyName);
			if (ObjectUtil.isEmpty(model)) {
				ReflectionUtils.invokeSetterMethod(superDec, propertyName,
						decor);
				return decor;
			}
			Map<String, String> map = ArrayUtil.toMap(params);
			if (!MapUtils.isEmpty(map))
				BeanUtils.populate(decor, map);
			decor.setModel(model);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return decor;
	}

	public synchronized static <Model, Decor extends Decorator<Model>> Decor exchange(
			Class<Decor> clazz, Model model, String... params) {
		Decor decor = null;
		try {
			if (ObjectUtil.isEmpty(model))
				return null;
			decor = ClassUtil.newInstance(clazz);
			Map<String, String> map = ArrayUtil.toMap(params);
			if (!MapUtils.isEmpty(map))
				BeanUtils.populate(decor, map);
			decor.setModel(model);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return decor;
	}

	@SuppressWarnings("unchecked")
	public static <Model, Decor extends Decorator<Model>> List<Decor> exchange(
			Decor dec, Collection<Model> models, String... params) {
		List<Decor> decorList = new ArrayList<Decor>();
		try {
			for (Model model : models) {
				decorList.add((Decor) DecoratorFactory.exchange(dec.getClass(),
						model, params));
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return decorList;
	}

	public static <Model, Decor extends Decorator<Model>> List<Decor> exchange(
			Class<Decor> clazz, Collection<Model> models, String... params) {
		List<Decor> decorList = new ArrayList<Decor>();
		try {
			for (Model model : models) {
				decorList.add(DecoratorFactory.exchange(clazz, model, params));
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return decorList;
	}

	public static <Model, Decor extends Decorator<Model>> Set<Model> exchange(
			Collection<Decor> decs, String... params) {
		Set<Model> decorList = new HashSet<Model>();
		try {
			for (Decor dec : decs) {
				Model model = dec.getModel();
				Map<String, String> map = ArrayUtil.toMap(params);
				if (!MapUtils.isEmpty(map))
					BeanUtils.populate(model, map);
				decorList.add(model);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return decorList;
	}

}

package com.wesley.framework.decoration;

import org.apache.struts2.json.annotations.JSON;

import com.wesley.framework.commen.reflect.GenericsUtils;

@SuppressWarnings("serial")
public abstract class DecoratorModel<Model> implements Decorator<Model> {

	private Model model;

	// protected DecoratorHelper<Model, ? extends Decorator<Model>> helper;

	/**
	 * 装饰器构造函数，如果没有自动创建一个实体
	 */
	@SuppressWarnings("unchecked")
	public DecoratorModel() {
		super();
		try {
			Class<Model> cls = GenericsUtils.getSuperClassGenricType(
					this.getClass(), 0);
			this.setModel(cls.newInstance());
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		}
	}

	/**
	 * @param model
	 *            将实体封装进入装饰器
	 */
	public DecoratorModel(Model model) {
		super();
		this.setModel(model);
	}

	@JSON(serialize = false)
	@Override
	public final Model getModel() {
		return this.model;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see com.wesley.framework.decoration.Decorator#setModel(java.lang.Object)
	 * 装饰器接口，将Model注入到装饰器中
	 */
	@Override
	public void setModel(Model model) {
		this.model = model;
		// helper = new DecoratorHelper<Model,Decorator<Model>>(
		// (Class<Decorator<Model>>) this.getClass());
	}

	// /*
	// * (non-Javadoc)
	// *
	// * @see
	// *
	// com.wesley.framework.decoration.Decoration#baseExchange(java.lang.Object)
	// *
	// * 反射必有参数构造函数，将实体包含在装饰器之中
	// */
	// @SuppressWarnings("unchecked")
	// @Override
	// public Decor baseExchange(Model model) {
	// Decor decor = null;
	// try {
	// decor = (Decor) this.getClass().getConstructor(model.getClass())
	// .newInstance(model);
	// } catch (InstantiationException e) {
	// e.printStackTrace();
	// } catch (IllegalAccessException e) {
	// e.printStackTrace();
	// } catch (IllegalArgumentException e) {
	// e.printStackTrace();
	// } catch (SecurityException e) {
	// e.printStackTrace();
	// } catch (InvocationTargetException e) {
	// e.printStackTrace();
	// } catch (NoSuchMethodException e) {
	// e.printStackTrace();
	// }
	// decor.setModel(model);
	// return decor;
	// }
	//
	// /*
	// * (non-Javadoc)
	// *
	// * @see
	// *
	// com.wesley.framework.decoration.Decoration#baseExchange(java.util.Collection
	// * 转换List等Collection接口数据
	// */
	// @Override
	// public List<Decor> baseExchange(Collection<Model> models) {
	// List<Decor> decorList = new ArrayList<Decor>();
	// for (Model model : models) {
	// decorList.add(this.baseExchange(model));
	// }
	// return decorList;
	// }

}