开发中通常会碰到这种需求，比如一个“新建”菜单，只想要在项目的第一级或者指定文件夹才显示，这时就需要过滤菜单

　　　　1.　首先需要添加‘新建’菜单的扩展点

　　　　

对应的test类实现

public class ResourceTester extends PropertyTester {    public ResourceTester() {            }    @Override    public boolean test(Object receiver, String property, Object[] args,            Object expectedValue) {         if (property.equals("htmlFolder")) {            if("html".equals(expectedValue)){                if (WorkspaceUtil.isProject(receiver)) {                    boolean mainFolder = WorkspaceUtil.isMainFolder(receiver);                    boolean htmlFolder = WorkspaceUtil.isHtmlFolder(receiver);                     return mainFolder && htmlFolder;                }                                            }         return false;    }}