问面试Q-设计文件系统-回顾

EN

  interface BaseFileSystem
{
    /*Basic file/folder attributes are:
      1. File/Folder Size
      2. File/Folder Date created
      3. File/Folder Date Modified
      4. File/Folder permissions - Read, write and execute
      5. File/Folder Owner - Owner of the file who defines permissions for other users
      6. File/Folder Visibility - Hidden or Visible
      7. File/Folder Name 

      Hence each one of the above attributes would have public <return type> get() and public void set<AttributeName>(<variable datatype>) */
}

public class File implements BaseFileSystem
{
       /*The `File` class should implement all of the methods from interface `BaseFilesystem`.
         In addition, it must also implement following specific methods that can only be associated with physical files*/

        public String getFileExtension(){….}

        public void setFileExtension(String value) {….}

        public String[] getAssociatedPrograms(){ …..}

        public void executable(){ …. };
}

public class Folder implements BaseFileSystem
{

      /*The `Folder` class should implement all of the methods from interface `BaseFileSystem`. In addition, it must also implement following specific methods that can only be associated with the physical 'folders'*/

        public BaseFileSystem[] getSubFoldersAndFiles(){ …. }

        public void addSubFolderAndFiles(BaseFileSystem fileObj) { …. }

        public void executable(){throw new UnsupportedOperationException();}
}