The composite pattern_Week 8 solution

This exercise will test your knowledge of the composite pattern. SET-UP Import the Netbeans project folder named 'AJP-P8-2012-2013-STUDENT'. Open it up. You have been given a set of unit tests. Initially, there will be LOTS of syntax errors in these unit tests. This is expected. The errors will disappear as you write the required classes.
INSTRUCTIONS FOR BRONZE TASK You are working on a strategy game. In this game, users can create soldiers. Soldiers can be added to squads. Large squads can be built by combining two or more smaller squads. Using the composite pattern, implement a solution that allows soldiers and squads of soldiers to be treated identically. Bear the following notes in mind:
• You must create an interface called Deployable with a single method getStrength(). This method returns an int. • You must create a concrete implementation of Deployable called Soldier. When the getStrength() method of class Soldier is called, the method should return the value 1. • You must create a concrete implementation of Deployable called Squad. • The Squad class should declare an ArrayList • The Squad class should have an add() method that allows you to add a Deployable object to its ArrayList • The Squad class should have an remove() method that allows you to remove a Deployable object from its ArrayList • When the getStrength() method of the Squad class is called, the method should iterate through all the Deployable objects in the ArrayList, calling getStrength() on each member of the list, and returning the sum. • For example, if a Squad contains 4 Soldiers, the getStrength() method should return 4 when it is called. Make sure that your solution to the BRONZE task does not have any CheckStyle errors. You cannot pass this task if your code contains CheckStyle errors
INSTRUCTIONS FOR SILVER TASK In uk.ac.tees.username.silver, extend your solution to the BRONZE task in the following way: • Create a concrete implementation of Deployable called Grenadier. When the getStrength() method of this class is called, the method should return 3. • Create a concrete implementation of Deployable called MachineGunner. When the getStrength() method this class is called, the method should return 5.
• Change Deployable from an interface to an abstract class • Add a new method to Deployable called attack(). The full signature of this method should be
boolean attack(Deployable deployable)
This method is invoked when one Deployable object attacks another. The outcome of the attack is decided by comparing the strength attributes of the two objects. The object with the highest strength attribute wins. Ties are resolved in favour of the attacking party. For example, if a Grenadier (strength 3) attacks a Soldier (strength 1), the method should return true (successful attack). If a Grenadier (strength 3) attacks a MachineGunner (strength 5), the method should return false (failed attack). If Soldier x (strength 1) attacks Soldier y (strength 1), the method should return true (successful attack).
Make sure that your solution to the SILVER task does not have any CheckStyle errors. You cannot pass this task if your code contains CheckStyle errors
INSTRUCTIONS FOR GOLD TASK This task involves material that we have not covered in class and will require research. Furthermore, to spice up the medal race, I will be providing NO HELP with this task. All EasyFlap planes have storage lockers. These lockers can be filled with various items of in-flight equipment. In this exercise you will design and implement a java class that describes these lockers. This class will use generics. In the first step we will build a class library that describes the things we can put into a Locker. • You must create an abstract class called Gear. This class has two instance variables. The first is an int which stores the weight of the item in kg. The second is a char which stores a code identifying the type of the item – (b)edding, (f)ood, (m)edical or (s)anitary products. • Referring to InfoTest.java, develop an enum called Info. • Implement a concrete class called Blankets that extends Gear. This class should be initialised using values taken from the enum Info. • Implement a concrete class called Food that extends Gear. This class should be initialised using values taken from the enum Info. • Implement a concrete class called Medkit that extends Gear. This class should be initialised using values taken from the enum Info. • Implement a concrete class called Napkins that extends Gear. This class should be initialised using values taken from the enum Info. • Implement a concrete class called Oxygen that extends Gear. This class should be initialised using values taken from the enum Info. • Implement a concrete class called Pillows that extends Gear. This class should be initialised using values taken from the enum Info.
• Implement a concrete class called SicknessBag that extends Gear. This class should be initialised using values taken from the enum Info. When InfoTest and GearTest are passing, we can move on to the next stage. • You must create a class called Locker. • The Locker class should be parameterized with a generic type T, where T is the type of item the locker contains • The Locker class should have a generic method called add() that adds an item to the Locker. • The Locker class should declare an ArrayList of type T that stores anything which is successfully added to the Locker • Here are the rules to apply when adding items to a Locker ◦ You cannot mix food and bedding ◦ You cannot mix medicine and bedding ◦ You cannot mix medicine and food ◦ Sanitary products can be mixed with anything ◦ You cannot exceed 20kg per locker Make sure that your solution to the GOLD task does not have any CheckStyle errors. You cannot pass this task if your code contains CheckStyle errors