storages.java

tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛tbuy1.1.5是在netbeans环境下用JSF技术编写的一个论坛

/*
 * 作者: 胡李青
 * qq: 31703299 
 * Copyright (c) 2007 huliqing
 * 主页 http://www.tbuy.biz/
 * 你可以免费使用该软件，未经许可请勿作用于任何商业目的,如有技术问题请与本人联系！
 */

package biz.tbuy.bbs.bean;

import biz.tbuy.bbs.AuthCheck;
import biz.tbuy.bbs.StorageAction;
import biz.tbuy.bbs.StorageModel;
import biz.tbuy.common.Constants;
import biz.tbuy.common.Utils;
import biz.tbuy.common.page.DataPage;
import biz.tbuy.common.page.PagedListDataModel;
import java.util.ArrayList;
import java.util.List;
import javax.faces.component.UIData;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;
import javax.faces.model.DataModel;

/**
 * @author huliqing
 * <p><b>qq：</b>31703299
 * <p><b>E-mail：</b><a href="mailto:[e-mail]">[e-mail]</a>
 * <p><b>Homepage：</b><a href="http://www.tbuy.biz/">http://www.tbuy.biz/</a>
 */
public class Storages extends BaseBean{
    private DataModel _storages;
    private int _pageSize = 12;
    private UIData _uiStorages;
    
    public Storages() {}
    
    public void setStorages(DataModel storages) {
        _storages = storages;
    }
    
    public DataModel getStorages() {
        if (_storages == null) {
            _storages = new LocalDataModel(_pageSize);
        }
        return _storages;
    }
    
    public void setPageSize(int pageSize) {
        _pageSize = pageSize;
    }
    
    public int getPageSize() {
        return _pageSize;
    }
    
    public void setUiStorages(UIData uiStorages) {
        _uiStorages = uiStorages;
    }
    
    public UIData getUiStorages() {
        return _uiStorages;
    }
    
    /** method ****************************************************************/
    /**
     * 根据所选择的StorageModel获得对应的主题id,并转到主题页面
     */
    public String toShow() {
        StorageModel storage = (StorageModel)_uiStorages.getRowData();
        FacesContext fc = getFacesContext();
        UIViewRoot view = fc.getApplication().
                getViewHandler().
                createView(fc, "/bbs/topic/" + storage.getByTopic() + ".faces");
        fc.setViewRoot(view);
        return Constants.OUT_SUCCESS;
    }

    /**
     * 删除选中的StorageModel, 该方法将彻底删除该收藏信息,与回收不同。
     * 1.检查用户是否已经登录
     * 2.检查删除收藏信息的权限
     * 3.开始删除
     */
    public String delete() {
        // 1
        if (!getVisitor().isLogin()) {
            Utils.addErrorMessage(getBundle(), "对不起，你还没有登录系统！");
            return Constants.OUT_FAILURE;
        }
        // 2
        AuthCheck aCheck = new AuthCheck();
        String userId = getVisitor().getUser().getId();
        StorageModel storage = (StorageModel)_uiStorages.getRowData();
        if (!aCheck.isPermitDeleteStorage(storage, userId)) {
            Utils.addErrorMessage(getBundle(), "对不起，权限不够，无法删除信息！");
            return Constants.OUT_FAILURE;
        }
        // 3
        if (StorageAction.deleteStorage(storage.getNum())) {
            Utils.addInfoMessage(getBundle(), "删除信息成功！");
            return Constants.OUT_SUCCESS;
        } else {
            Utils.addErrorMessage(getBundle(), "删除信息时遇到问题！");
            return Constants.OUT_FAILURE;
        }
    }
    
    /**
     * 同时删除多个StorageModel
     * 1.检查登录
     * 2.检查权限
     */
    public String deleteMany() {
        // 1
        if (!getVisitor().isLogin()) {
            Utils.addErrorMessage(getBundle(), "对不起，你还没有登录系统！");
            return Constants.OUT_FAILURE;
        }
        // 2
        DataModel dataList = (DataModel)_uiStorages.getValue();
        @SuppressWarnings("unchecked")
        List<StorageModel> storages = (List<StorageModel>)dataList.getWrappedData();
        List<StorageModel> storRevokes = new ArrayList<StorageModel>();
        for (StorageModel storage : storages) {
            if (storage.getBeRevoke()) {
                storRevokes.add(storage);
            }
        }
        if (storRevokes.isEmpty()) {
            return Constants.OUT_SUCCESS;
        }
        AuthCheck aCheck = new AuthCheck();
        String userId = getVisitor().getUser().getId();
        for (StorageModel storage : storRevokes) {
            if (!aCheck.isPermitDeleteStorage(storage, userId)) {
                Utils.addErrorMessage(getBundle(), "删除信息时，遇到权限不足的问题！");
                return Constants.OUT_FAILURE;
            }
        }
        // 3
        StorageAction.deleteStorages(storRevokes);
        Utils.addInfoMessage(getBundle(), "删除成功！");
        return Constants.OUT_SUCCESS;
    }
    
    /*** page about ***********************************************************/
    protected DataPage getDataPage(int startRow, int pageSize) {
        if (!getVisitor().isLogin()) {
            return null;
        }
        String userId = getVisitor().getUser().getId();
        int total = StorageAction.getTotalByUser(userId);
        List<StorageModel> dataList = StorageAction.getStoragesByUser(userId, startRow, pageSize);
        return new DataPage(total, startRow, dataList);
    }
    
    private class LocalDataModel extends PagedListDataModel {
        public  LocalDataModel(int pageSize) {
             super (pageSize);
        }
        public DataPage fetchPage(int startRow,int pageSize) {
             // call enclosing managed bean method to fetch the data 
             return getDataPage(startRow, pageSize);
        }
    }
}