org.webframe.web.menu.MenuUtil Maven / Gradle / Ivy
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package org.webframe.web.menu;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import net.sf.json.JSONArray;
import net.sf.json.JsonConfig;
import net.sf.json.util.PropertyFilter;
import org.springframework.context.ApplicationContext;
import org.webframe.support.driver.ModulePluginUtils;
import org.webframe.web.util.WebFrameUtils;
/**
* 菜单工具类
*
* @author 黄国庆
* @since 2012-4-6 上午10:51:11
* @version
*/
public class MenuUtil {
/**
* 获取菜单json串；如果IMenuService实现类不存在，返回模块默认菜单
*
* @param id
* @param level
* @return
* @author 黄国庆 2012-4-6 上午10:59:35
*/
public static String getMenusJson(String id, int level) {
IMenuService menuService = getMenuService();
List menus = null;
if (menuService != null) {
menus = menuService.getMenus(id, level);
} else {
menus = getAllModulesDefaultMenu();
}
return convert(menus);
}
/**
* 从spring配置文件中获取IMenuService实现类
*
* @return
* @author 黄国庆 2012-4-6 下午12:34:01
*/
private static IMenuService getMenuService() {
ApplicationContext ac = WebFrameUtils.getApplicationContext();
if (ac == null) return null;
try {
Map menuMap = ac.getBeansOfType(IMenuService.class);
return getSubMenuService(menuMap);
} catch (Exception e) {
return null;
}
}
/**
* 获取所有模块的默认菜单集合
*
* @return
* @author 黄国庆 2012-4-6 下午12:33:36
*/
private static List getAllModulesDefaultMenu() {
Enumeration enumeration = ModulePluginUtils.getDrivers(IMenuSupport.class);
List all = new ArrayList();
while (enumeration.hasMoreElements()) {
IMenuSupport menuSupport = enumeration.nextElement();
all.addAll(menuSupport.getModuleMenus());
}
return all;
}
/**
* 转换集合为json串
*
* @param menus
* @return
* @author 黄国庆 2012-4-6 下午12:33:15
*/
private static String convert(List menus) {
if (menus == null) return "[]";
JsonConfig jsonConfig = new JsonConfig();
jsonConfig.setJsonPropertyFilter(new PropertyFilter() {
@Override
public boolean apply(Object source, String name, Object value) {
return !(name.equals("name") || name.equals("url") || name.equals("subMenus") || name.equals("parentId") || name.equals("id"));
}
});
JSONArray jsonArray = JSONArray.fromObject(menus, jsonConfig);
return jsonArray.toString();
}
/**
* 获取map集合中的超子类
*
* @param menuMap
* @return
* @author 黄国庆 2012-4-6 下午12:32:42
*/
static IMenuService getSubMenuService(Map menuMap) {
int length = menuMap.size();
if (length == 0) return null;
Iterator it = menuMap.values().iterator();
IMenuService sub = null;
while (it.hasNext()) {
if (length == 1) return it.next();
IMenuService temp = it.next();
Class clazz = null;
if (sub == null) {
clazz = IMenuService.class;
} else {
clazz = sub.getClass();
}
if (clazz.isAssignableFrom(temp.getClass())) {
sub = temp;
}
}
return sub;
}
}