package com.ssh.shop.action;

import java.io.InputStream;

import java.lang.reflect.ParameterizedType;

import java.util.List;

import java.util.Map;

import javax.annotation.Resource;

import org.apache.struts2.interceptor.ApplicationAware;

import org.apache.struts2.interceptor.RequestAware;

import org.apache.struts2.interceptor.SessionAware;

import org.springframework.context.annotation.Scope;

import org.springframework.stereotype.Controller;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

//...

/**

 * 设置jsp中使用到的session、request、application

 * 其他action继承该类，可以使用这些对象，而不用再重复地自己创建

 *

 * 注意：在项目启动的时候，struts过滤器会自动把相应的内置对象，

 *     和内置对象对应的sessionMap、requestMap、applicateMap，

 *     存储到ActionContext和值栈中，

 *     实现的拦截器为servletConfig(org.apache.struts2.interceptor.ServletConfigInterceptor)

 *

 * Struts执行流程：创建action ---> 调用拦截器  ---> 拦截器访问成功后调用action的方法

 *

 * ServletConfigInterceptor源代码中有下面代码：（判断实现什么接口，就注入什么对象）

 *     if (action instanceof ApplicationAware) //如果action实现了ApplicationAware接口

            ((ApplicationAware) action).setApplication(context.getApplication());

    if (action instanceof SessionAware)

        ((SessionAware) action).setSession(context.getSession());

    if (action instanceof RequestAware)

        ((RequestAware) action).setRequest((Map) context.get("request"));

 *

 * 加入的ModelDriven泛型的使用方法

 * @author Administrator

 *

 */

@SuppressWarnings("unchecked")

@Controller

@Scope("prototype")

public class BaseAction<T> extends ActionSupport implements SessionAware,RequestAware,ApplicationAware,ModelDriven<T>{

    //批量删除的记录的id数组

    protected String ids;

    protected T model;

    protected Map<String, Object> session;

    protected Map<String, Object> request;

    protected Map<String, Object> applicate;

    /**

     * 存储数据给前台，可以为记录count和总记录数，用来分页

     */

    protected Map<String, Object> pageMap = null;

    /**

     * 流形式数据

     */

    protected InputStream inputStream;

        /**

     * Json格式数据

     */

    List<T> jsonList = null;

    @Resource  //spring属性注入

    protected CategoryService categoryService;

    @Resource

    protected AccountService accountService;

    @Resource

    protected ProductService productService;

    @Resource

    protected UploadUtil uploadUtil;

    //用户文件上传(使用方法见product/save.jsp中图片上传)

    protected FileUpload fileUpload;

    /**

         * 很重要

     * 获取T的具体类型

     * 实现ModelDriven接口，必须要写此方法：获取实例

     */

    @Override

    public T getModel() {

        ParameterizedType type = (ParameterizedType) this.getClass().getGenericSuperclass();

        Class clazz = (Class) type.getActualTypeArguments()[0];

        try {

            model = (T) clazz.newInstance();

        } catch (InstantiationException e) {

            e.printStackTrace();

        } catch (IllegalAccessException e) {

            e.printStackTrace();

        }

//        System.out.println("model:"+model);

        return model;

    }

    @Override

    public void setApplication(Map<String, Object> applicate) {

        this.applicate = applicate;

    }

    @Override

    public void setRequest(Map<String, Object> request) {

        this.request = request;

    }

    @Override

    public void setSession(Map<String, Object> session) {

        this.session = session;

    }

    public Map<String, Object> getPageMap() {

        return pageMap;

    }

    /**

     * 只写get方法，用于将获取的数据传输给前台

     * @return

     */

    public InputStream getInputStream() {

        return inputStream;

    }

    /**

     * 只写get方法，用于将获取的数据传输给前台

     * @return

     */

    public List<T> getJsonList() {

        return jsonList;

    }

    public FileUpload getFileUpload() {

        return fileUpload;

    }

    public void setFileUpload(FileUpload fileUpload) {

        this.fileUpload = fileUpload;

    }

}