package br.com.caelum.cj05;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

public class MagicRequest extends HttpServletRequestWrapper {
	private Object action;

	public MagicRequest( HttpServletRequest request, Object action) {
		super(request);
		this.action = action;
	}
	
	@Override
	public Object getAttribute(String key) {
		if (action != null) {
			for (Method method : action.getClass().getMethods()) {
				if (method.getName().equalsIgnoreCase("get" + key))
					try {
						return method.invoke(action, null);
					} catch (IllegalArgumentException e) {
						e.printStackTrace();
					} catch (IllegalAccessException e) {
						e.printStackTrace();
					} catch (InvocationTargetException e) {
						e.printStackTrace();
					}
			}
		}
		return super.getAttribute(key);
	}
}