Create a program that finds a path across the desert grid using rats.
General behavior and specifications of program.
The program will consist of one static class: ControlDriver class, and five object producing classes: Desert class, Cell class, Hole class, RatStatus class, and Rat class. There will also be a static ObjectCreator class that I will provide.
The ObjectCreator class is a static class that will provide Desert, Rat, RatStatus, Cell, and Hole objects when requested. Return values from these requests are interface types. The purpose of this class is to hide the production of objects from the client classes. Client classes will only use interfaces to work with objects.
The ControlDriver class is a static class that will
contain the main() method, which is the entry point into the program
control the timing of the rat moves.It will control the timing of rat movement across the desert by telling the Desert object when a rat can move. ControlDriver will use a loop to notify the Desert to move a rat for each move.
only communicate with the Desert and RatStatus objects through their respective interfaces.
be responsible for initiating the creation of new Rat objects.It will call startRat():RatStatusInterface – Desert and receive back a RatStatus object that contains the unique ID and status for the new rat.
it will maintain a list of current rat IDs.
request the creation of the Desert objectIt will request the creation of a single Desert object by calling ObjectCreator.createNewDesert(), and work through the DesertInterface of the object in running rats through the desert grid.
The Desert will
implement the DesertInterface
create the 2-dimensional CellInterface array for the desert during the construction of a new Desert object.The Desert constructor will query the user for the size of the desert array.
The Desert will create a two-dimensional array to represent the desert. It will be of type CellInterface[][], and will hold Cell and Hole objects.Cell class implements CellInterface,
call ObjectCreator.ceateNewRat() to create a Rat object when prompted and return a unique ID tuple for that Rat object (RatStatus). Note this is not the reference to the Rat object (see Ratstatus class).
start the rat in location (0,0) of the Desert’s array by doing the following task.will hand over a Rat to a cell and remove the Rat’s reference from its own records.
be responsible for keeping track of the rat’s location and movement path(Note: You may delegate keeping track of the rat’s movement path to the Rat. We will discuss this during lecture.)
The Desert, when prompted by the ControlDriver, will:retrieve a Rat from a cell by asking the cell if it has a Rat with a given ID. It receives the Rat’s reference, and the cell will set its storage of that Rat’s reference to null.
prompt the rat for a move direction.
The Desert will calculate the rat’s next location using the move direction provided by the rat and the current location of the rat.
The Desert moves the Rat one cell in a straight line in the direction indicated by the rat.
upon completion of the move, the desert will report back to the ControlDriver with the Rat’s ID and stateThe state is: 0: when the rat is waiting to move, 1: when the Rat is gone(died or escaped), or -1: When the Rat finishes the Desert.
will work with the rat object indicated by the control driver, by calling methods from the rat, using the RatInterface. The rat is an object of the Rat class.
keep rats from falling off the edge. The rats will stay in the grid cell closest to the edge or not move if they are at the edge, but it will still count as a move.
display the final results
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