indexbean.java

HR系统模拟企业对内部职员的管理

/*$Id: IndexBean.java,v 1.1 2008/07/15 03:38:23 liqi Exp $
 *--------------------------------------
 * Apusic (Kingdee Middleware)
 *---------------------------------------
 * Copyright By Apusic ,All right Reserved
 * author   date   comment
 * chenhongxin  2008-4-14  Created
*/
package org.operamasks.example.ejb.hr.litebean.module;

import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.faces.application.Application;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;

import org.operamasks.example.ejb.hr.constants.ILocalStringsKey;
import org.operamasks.example.ejb.hr.constants.IUserConstants;
import org.operamasks.example.ejb.hr.entity.Module;
import org.operamasks.example.ejb.hr.entity.ModuleItem;
import org.operamasks.example.ejb.hr.entity.Role;
import org.operamasks.example.ejb.hr.entity.User;
import org.operamasks.example.ejb.hr.service.ServiceBean;
import org.operamasks.example.ejb.hr.util.TagPanelUtil;
import org.operamasks.example.ejb.hr.util.Util;
import org.operamasks.faces.annotation.Action;
import org.operamasks.faces.annotation.ActionListener;
import org.operamasks.faces.annotation.BeforeRender;
import org.operamasks.faces.annotation.Bind;
import org.operamasks.faces.annotation.ManagedBean;
import org.operamasks.faces.annotation.ManagedBeanScope;
import org.operamasks.faces.annotation.ManagedProperty;
import org.operamasks.faces.component.ajax.AjaxUpdater;
import org.operamasks.faces.component.widget.UIButton;
import org.operamasks.faces.component.widget.UISeparator;
import org.operamasks.faces.component.widget.UIToolBar;
import org.operamasks.faces.component.widget.menu.UICommandMenuItem;
import org.operamasks.faces.component.widget.menu.UIMenu;


/**
 * 主页面的托管Bean
 * @author chenhongxin
 */
@ManagedBean(name = "module.indexBean", scope = ManagedBeanScope.SESSION)
public class IndexBean extends BaseBean {
	private static final String HELP_PAGE_URL = "help.faces";
	private static final String HELP_ICON_URL = "../resources/images/help.png";
	private static final String REFRESH_ICOM_URL = "../resources/images/refresh.png";
	
	/**
	 * 注入服务提供Bean，该Bean提供各种的业务操作对象
	 */
	@ManagedProperty("#{serviceBean}")
	private ServiceBean service;

	/**
	 * 绑定页面上的ToolBar组件
	 */
	@Bind(id = "toolBar", attribute = "binding")
	private UIToolBar toolBar;

	/**
	 * 绑定菜单项的Updater
	 */
	@Bind(id = "menuUpdater", attribute = "binding")
	private AjaxUpdater menuUpdater;
	
	/**
	 * 绑定页面的js脚本回调
	 */
	@Bind(id="scripter", attribute="script")
	private String scripter;

	@BeforeRender
	protected void beforeRender(boolean isPostBack) {
		initBaseResource();
		if (!isPostBack) {
			ExternalContext eContext = FacesContext.getCurrentInstance().getExternalContext();
			Map<String, Object> session = eContext.getSessionMap();
			User user = (User)session.get(IUserConstants.USER_BEAN);
			Set<String> validateItems = getValidateModuleItemIdSet(user.getRole());
			
			FacesContext context = FacesContext.getCurrentInstance();
			Application application = context.getApplication();
			List<Module> modules = service.getModuleService().listModule();
			if (modules != null) {
				for (Module module : modules) {
					//创建菜单
					UIMenu menu = (UIMenu)application.createComponent(UIMenu.COMPONENT_TYPE);
					menu.setLabel(module.getName());
					menu.setImage(module.getIcon());

					List<ModuleItem> items = module.getModuleItems();
					if (items != null) {
						for (ModuleItem item : items) {
							//创建菜单下拉项
							UICommandMenuItem uiItem = (UICommandMenuItem)application.createComponent(UICommandMenuItem.COMPONENT_TYPE);
							uiItem.setLabel(item.getName());
							uiItem.setImage(Util.getBasePath() + item.getIcon());
							uiItem.setValue(item.getUrl());
							//添加事件监听
							uiItem.addActionListener(Util.createMethodExpressionActionListener(context, "#{module.indexBean.redirect}"));
							if(validateItems.contains(item.getId())) {//只有当前用户角色可见的模块项才添加到菜单
								menu.getChildren().add(uiItem);
							}
						}
					}

					toolBar.getChildren().add(menu);
					UISeparator separator = (UISeparator)application.createComponent(UISeparator.COMPONENT_TYPE);
					toolBar.getChildren().add(separator);
				}
				
				//创建帮助按钮
				UIButton helpBtn = (UIButton)application.createComponent(UIButton.COMPONENT_TYPE);
				helpBtn.setId("help");
				helpBtn.setLabel(getMessages().get(ILocalStringsKey.MENU_HELP_LABEL));
				helpBtn.setImage(HELP_ICON_URL);
				helpBtn.setValue(HELP_PAGE_URL);
				toolBar.getChildren().add(helpBtn);
				
				//创建刷新按钮
				UIButton refreshBtn = (UIButton)application.createComponent(UIButton.COMPONENT_TYPE);
				refreshBtn.setId("refresh");
				refreshBtn.setLabel(getMessages().get(ILocalStringsKey.MENU_REFRESH_LABEL));
				refreshBtn.setImage(REFRESH_ICOM_URL);
				toolBar.getChildren().add(refreshBtn);
				
				//使用AjaxUpdater动态刷型区域组件
				menuUpdater.reload();
			}
		}
	}
	
	/**
	 * 获取角色对应的合法访问模块的id集合
	 * @param role 进行判断的角色对象
	 * @return 角色对应的合法访问模块的id集合
	 */
	private Set<String> getValidateModuleItemIdSet(Role role) {
		List<ModuleItem> validateItems = role.getModuleItems();
		if(validateItems == null) return Collections.emptySet();
		Set<String> set = new HashSet<String>();
		for(ModuleItem item : validateItems) {
			set.add(item.getId());
		}
		return set;
	}
	
	/**
	 * 绑定帮助按钮点击事件
	 */
	@Action(id="help")
	public void help() {
		scripter = formatScript(getMessages().get(ILocalStringsKey.MENU_HELP_LABEL), 
								HELP_PAGE_URL, 
								HELP_ICON_URL);
	}
	
	/**
	 * 绑定刷新当前标签页的按钮点击事件
	 */
	@Action(id="refresh")
	public void refresh() {
		scripter = "refreshTag();";
	}

	/**
	 * 事件监听函数，用于执行菜单按钮点击后的页面切换的脚本回调
	 * @param e ActionEvent
	 */
	@ActionListener
	public void redirect(ActionEvent e) {
		if (e.getComponent() instanceof UICommandMenuItem) {
			UICommandMenuItem item = (UICommandMenuItem) e.getComponent();
			Object obj = item.getValue();
			String url = (obj instanceof String ? (String)obj : obj.toString());
			scripter = formatScript(item.getLabel(), url, item.getImage());
		}
	}
	
	/**
	 * 格式化调用添加标签页的js回调脚本
	 * @param title 标签页的名称
	 * @param url 标签页内容页面的url
	 * @param icon 标签页的小图标地址
	 * @return 格式化好的js回调脚本字符串
	 */
	private String formatScript(String title, String url, String icon) {
		return String.format("addTab('%s','%s','%s');", title, url, TagPanelUtil.getTabPanelIconCls(icon));
	}
}