JAVA装饰模式，封装父类，提供转换接口（二）

http://numen06.iteye.com/blog/1428067
上一篇文章提到了装饰类的父类，对于一些基本功能的封装。
在实际运用过程中，带的类型有两个太复杂， 不利于装饰类的扩展。
所以功能和装饰类区分，以便更好的扩展。

package com.wesley.framework.decoration;

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

public interface Decoration<Model, Decor extends Decorator<Model>> {

	public List<Decor> baseExchange(Collection<Model> models);

	public Decor baseExchange(Model model);

}

package com.wesley.framework.decoration;

public interface Decorator<T> extends java.io.Serializable {

	public void setModel(T model);

	public T getModel();
}

package com.wesley.framework.decoration;

import com.wesley.framework.commen.GenericsUtils;

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

	protected 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);
	}

	@Override
	public Model getModel() {
		return 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;
	// }

}

package com.wesley.framework.decoration;

import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class DecoratorHelper<Model, Decor extends Decorator<Model>> implements
		Decoration<Model, Decor> {

	private Class<Decor> clazz;

	public DecoratorHelper(Class<Decor> dec) {
		super();
		this.clazz = dec;
	}

	@SuppressWarnings("unchecked")
	public DecoratorHelper(Decor dec) {
		super();
		this.clazz = (Class<Decor>) dec.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
	 */
	@Override
	public Decor baseExchange(Model model) {
		Decor decor = null;
		try {
			decor = clazz.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;
	}
}