NewsDao.java

package edu.hebtu.movingcampus.biz;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.type.TypeReference;

import android.app.Activity;
import edu.hebtu.movingcampus.biz.base.BaseDao;
import edu.hebtu.movingcampus.config.Constants;
import edu.hebtu.movingcampus.config.Urls;
import edu.hebtu.movingcampus.entity.CategorysEntity;
import edu.hebtu.movingcampus.entity.NewsMore;
import edu.hebtu.movingcampus.entity.NewsShort;
import edu.hebtu.movingcampus.enums.NewsType;
import edu.hebtu.movingcampus.utils.RequestCacheUtil;
import edu.hebtu.movingcampus.utils.Utility;

public class NewsDao extends BaseDao {
	private List<CategorysEntity> tabs = new ArrayList<CategorysEntity>();

	public NewsDao(Activity activity) {

		super(activity);
	}

	/*
	 * 
	 * new list json mapper
	 */
	public ArrayList<NewsShort> mapperJson(boolean useCache, String type,
			String from, String size) {
		// 默认加载10条新闻
		if (size == null)
			size = "10";
		ArrayList<NewsShort> newsJson = null;
		try {
			String result;
			result = RequestCacheUtil.getRequestContentByGet(
					mActivity,
					String.format(Urls.NEWS_LIST, type, from, size)
							+ Utility.getScreenParams(mActivity),
					Constants.WebSourceType.Json,
					Constants.DBContentType.Content_list, useCache);
			newsJson = mObjectMapper.readValue(result,
					new TypeReference<ArrayList<NewsShort>>() {
					});
			if (newsJson == null) {
				return null;
			}
			return newsJson;

		} catch (JsonParseException e) {
			e.printStackTrace();
		} catch (JsonMappingException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;

	}

	/*
	 * more news json mapper
	 */
	public NewsMore mapperJson(String id) {
		NewsMore response;
		try {
			String result = RequestCacheUtil.getRequestContentByGet(
					mActivity,
					String.format(Urls.NEWS_MORE, id)
							+ Utility.getScreenParams(mActivity),
					Constants.WebSourceType.Json,
					Constants.DBContentType.Content_content, true);
			response = mObjectMapper.readValue(result,
					new TypeReference<NewsMore>() {
					});
			return response;
		} catch (JsonParseException e) {
			e.printStackTrace();
		} catch (JsonMappingException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}
	
	  /*
    *
    * news search, brief news json mapper
    */
   public ArrayList<NewsShort> mapperJson(boolean useCache, String key) {
           ArrayList<NewsShort> newsJson;
           try {
                   String result;
                   result = RequestCacheUtil.getRequestContentByGet(
                                   mActivity,
                                   String.format(Urls.NEWS_SEARCH, key)
                                                   + Utility.getScreenParams(mActivity),
                                   Constants.WebSourceType.Json,
                                   Constants.DBContentType.Content_list, useCache);
                   newsJson = mObjectMapper.readValue(result,
                                   new TypeReference<ArrayList<NewsShort>>() {
                                   });
                   if (newsJson == null) {
                           return null;
                   }
                   return newsJson;

           } catch (JsonParseException e) {
                   e.printStackTrace();
           } catch (JsonMappingException e) {
                   e.printStackTrace();
           } catch (IOException e) {
                   e.printStackTrace();
           } catch (Exception e) {
                   e.printStackTrace();
           }
           return null;
   }


	public List<CategorysEntity> getCategorys() {
		for(int i=1;i<NewsType.values().length;i++){
			CategorysEntity cate = new CategorysEntity();
			cate.setName(NewsType.values()[i].name());
			tabs.add(cate);
		}
		return tabs;
	}
}