To restrict access to parts of a Web application, we use access filters. What does not describe access filters and how they work in our application framework?
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To restrict access to parts of a Web application, we use access filters. What does not describe access filters and how they work in our application framework?
a) Filters are classes declared as attributes
b) Filters are run after accessing the filtered class/method
c) Filters can be applied as attributes on classes and methods
d) Filters are discovered at the time of routing by using ReflectionClass objects.
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- 1. Explain why the operation handleMessagefromServer() appears in both ObservableClient and AdaptableClient classes. Are they concrete or abstract? 2. If we want the system give a signal to the client when a message from the server is received, what should the program do? Indicate what methods will be used to implement your idea. 3. Indicate the advantages of using the Observable pattern and Adapterpattern in this design.Is there a different way of doing this problem? Question: Create a class AccessPoint with the following attributes: x - a double representing the x coordinate y - a double representing the y coordinate range - an integer representing the coverage radius status - On or Off Add constructors. The default constructor should create an access point object at position (0.0, 0.0), coverage radius 0, and Off. Add accessor and mutator functions: getX, getY, getRange, getStatus, setX, setY, setRange and setStatus. Also, add a set function that sets the location coordinates and the range. Add the following member functions: move and coverageArea. Add a function overlap that checks if two access points overlap their coverage and returns true if they overlap. Add a function signalStrength that returns the wireless signal strength as a percentage. The signal strength decreases as one moves away from the access point location. Test your class by writing a main function that creates five access…Books can come in various formats, like paper books, audio books, ebooks, etc. Create a generic classBook that has as common attributes the title, the year of publication, and the author. The constructor of thisclass should instantiate all three attributes. Override the toString method of class Book that returns a stringthat contains the values of its attributes. Create a subclass PrintBook that extends Book with attributesPublisher and ISBN. Create another subclass AudioBook which has the book’s size (in MB), its playlength and the playback artist’s name as attributes. Both PrintBook and AudioBook classes override thetoString method inherited from Book. Write a Java application to demonstrate the usage of this hierarchy.
- a- Prepare a MS. Word document that contain a UML represent a class ofyour choice, the class should satisfy the following properties:- Consists at least three private attributes.- Two constructors one with no arguments and one with arguments.- Getter and setter methods for all attributes.- Override the equals method.- implement the Comparable interface.- Override the toString methods to return a string which representsall object’s information.b- Implement the above class using java and NetBeans IDE.c- Create class called Test with main method to do the following:- Create ArrayList object.- Create the 4 objects of the above class, the information should readfrom input console.- Add the objects in the ArrayList object.- Display the information of all objects in the array list. I want different class than beforea- Prepare a MS. Word document that contain a UML represent a class ofyour choice, the class should satisfy the following properties:- Consists at least three private attributes.- Two constructors one with no arguments and one with arguments.- Getter and setter methods for all attributes.- Override the equals method.- implement the Comparable interface.- Override the toString methods to return a string which representsall object’s information.b- Implement the above class using java and NetBeans IDE.c- Create class called Test with main method to do the following:- Create ArrayList object.- Create the 4 objects of the above class, the information should readfrom input console.- Add the objects in the ArrayList object.- Display the information of all objects in the array list.Create a Cycle class, with subclasses Unicycle, Bicycle and Tricycle. Demonstrate that an instance of each type can be upcast to Cycle via a ride( ) method. Using the above Cycle hierarchy, add a balance( ) method to Unicycle and Bicycle, but not to Tricycle. Create instances of all three types and upcast them to an array of Cycle. Try to call balance( ) on each element of the array and observe the results. Downcast and call balance( ) and observe what happens.
- Disease Covid-19 has symptoms, a unique id, and covid_19_status e.g. Symptomatic or Asyptomatic.Covid-19 can infect patients. A patients could have a patient-id, name, sneezing, coughing and fever and It has a method of checkPatient takes values of sneezing coughing and fever and display the result whether the patient is covid +ve or –ve according to the input values given by the user. Identity the classes (Attributes, function) in the above scenario? Can you code these classes and display the result If the input if 1 for all symptoms then display on console that patient is covid positive. Otherwise display a message it is covid negative?Implement LinkedListclass for this problema.Create an Employeeclass which will have details like EmployeeNo, EmployeeName and Address. You should pass value for EmployeeNo, EmployeeName and Addressthrough constructor.b.Create a method addInput( ) which will add employee details to LinkedList.c.Create method display( ) which should display all data from LinkedList using forward and reverse order using Iterator and ListIterator interfaces.d.Note:addInput( ) and display( ) should not be member functions of Employeeclass/** * A constructor that takes an existing user as well as a new userID. * It should create a new user with the newID given (which has the * same requirements as above), and the same tweets as the old user * that is being passed in. Information about the number of followers * or list of users the old user is following should not be copied. * All other instance variables should be initialized appropriately. * It may be a good idea to call the other constructor here. * * @param old the existing TwitterUser whose tweets we are copying * @param newID the ID of the new user to be created */ publicTwitterUser(TwitterUserold,StringnewID){
- 1. Which design pattern lets you define a new operation without changing the classes of the elements on which it operates? A) Visitor B) Command C) Decorator D) Chain of Responsibility 2. Which design pattern decouples the object that invokes the operation from the one that knows how to perform it? A) Command B) Strategy C) Visitor D) State 3. Which pattern to use when more than one object can handle a request and the handler is unknown? A) Chain of Responsibility B) State C) Visitor D) Command 4. The Tic-Tack-Toe is a classical Artificial Intelligence problem for which many algorithms have been proposed to solve it over the years. You were asked to provide a software component where the user can choose one algorithm at a time and try it. Which design pattern you will use? A) Strategy B) Visitor C) Chain of Responsibility D) CommandThis is the question - Create an abstract NewspaperSubscription class with fields for the subscriber name, address, and rate. Include get and set methods for the name field and get methods for the address and subscription rate; the setAddress() method is abstract. Create two subclasses named PhysicalNewspaperSubscription and OnlineNewspaperSubscription. The parameter for the setAddress() method of the PhysicalNewspaperSubscription class must contain at least one digit; otherwise, an error message is displayed and the subscription rate is set to 0. If the address is valid, the subscription rate is assigned $15. The parameter for the setAddress() method of the OnlineNewspaperSubscription class must contain an at sign (@) or an error message is displayed. If the address is valid, the subscription rate is assigned $9. Code I was given - public class DemoSubscriptions { public static void main(String args[]) { PhysicalNewspaperSubscription pnsGood = new…Create an abstract NewspaperSubscription class with fields for the subscriber name, address, and rate. Include get and set methods for the name field and get methods for the address and subscription rate; the setAddress() method is abstract. Create two subclasses named PhysicalNewspaperSubscription and OnlineNewspaperSubscription. The parameter for the setAddress() method of the PhysicalNewspaperSubscription class must contain at least one digit; otherwise, an error message is displayed and the subscription rate is set to 0. If the address is valid, the subscription rate is assigned $15. The parameter for the setAddress() method of the OnlineNewspaperSubscription class must contain an at sign (@) or an error message is displayed. If the address is valid, the subscription rate is assigned $9. Finally, write an application that declares several objects of both subscription subtypes and displays their data fields