Aula prática sobre refactoring

.gitignore

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+.idea/

src/Customer.java

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+import java.util.Enumeration;
+import java.util.Vector;
+
+public class Customer {
+    private String _name;
+    private Vector _rentals = new Vector();
+
+    public Customer(String name) {
+        _name = name;
+    }
+
+    public void addRental(Rental arg) {
+        _rentals.addElement(arg);
+    }
+
+    public String getName() {
+        return _name;
+    }
+
+    public Enumeration getRentals() {
+        return _rentals.elements();
+    }
+
+    public String statement() {
+        String result = "Rental Record for " + getName() + "\n";
+        Enumeration rentals = _rentals.elements();
+        while (rentals.hasMoreElements()) {
+            Rental each = (Rental) rentals.nextElement();
+            result += "\t" + each.getMovie().getTitle() + "\t" +
+                    String.valueOf(each.getCharge()) + "\n";
+        }
+        result += "Amount owed is " + String.valueOf(getTotalCharge()) + "\n";
+        result += "You earned " + String.valueOf(getTotalFrequentRenterPoints()) +
+                " frequent renter points";
+        return result;
+    }
+
+    public double getTotalCharge() {
+        double result = 0;
+        Enumeration rentals = _rentals.elements();
+        while (rentals.hasMoreElements()) {
+            Rental each = (Rental) rentals.nextElement();
+            result += each.getCharge();
+        }
+        return result;
+    }
+
+    public int getTotalFrequentRenterPoints() {
+        int result = 0;
+        Enumeration rentals = _rentals.elements();
+        while (rentals.hasMoreElements()) {
+            Rental each = (Rental) rentals.nextElement();
+            result += each.getFrequentRenterPoints();
+        }
+        return result;
+    }
+
+    public String htmlStatement() {
+        String result = "<H1>Rentals for <EM>" + getName() + "</EM></H1><P>\n";
+        Enumeration rentals = _rentals.elements();
+        while (rentals.hasMoreElements()) {
+            Rental each = (Rental) rentals.nextElement();
+            result += each.getMovie().getTitle() + ": " +
+                    String.valueOf(each.getCharge()) + "<BR>\n";
+        }
+        result += "<P>You owe <EM>" + String.valueOf(getTotalCharge()) + "</EM><P>\n";
+        result += "On this rental you earned <EM>" +
+                String.valueOf(getTotalFrequentRenterPoints()) +
+                "</EM> frequent renter points<P>";
+        return result;
+    }
+}

src/Movie.java

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+public class Movie {
+    public static final int CHILDRENS = 2;
+    public static final int REGULAR = 0;
+    public static final int NEW_RELEASE = 1;
+
+    private String _title;
+    private int _priceCode;
+
+    public Movie(String title, int priceCode) {
+        _title = title;
+        _priceCode = priceCode;
+    }
+
+    public String getTitle() {
+        return _title;
+    }
+
+    public int getPriceCode() {
+        return _priceCode;
+    }
+
+    public void setPriceCode(int arg) {
+        _priceCode = arg;
+    }
+
+    public double getCharge(int daysRented) {
+        double result = 0;
+        switch (_priceCode) {
+            case REGULAR:
+                result += 2;
+                if (daysRented > 2)
+                    result += (daysRented - 2) * 1.5;
+                break;
+            case NEW_RELEASE:
+                result += daysRented * 3;
+                break;
+            case CHILDRENS:
+                result += 1.5;
+                if (daysRented > 3)
+                    result += (daysRented - 3) * 1.5;
+                break;
+        }
+        return result;
+    }
+
+    public int getFrequentRenterPoints(int daysRented) {
+        if (_priceCode == NEW_RELEASE && daysRented > 1) {
+            return 2;
+        } else {
+            return 1;
+        }
+    }
+}

src/Rental.java

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+public class Rental {
+    private Movie _movie;
+    private int _daysRented;
+
+    public Rental(Movie movie, int daysRented) {
+        _movie = movie;
+        _daysRented = daysRented;
+    }
+
+    public int getDaysRented() {
+        return _daysRented;
+    }
+
+    public Movie getMovie() {
+        return _movie;
+    }
+
+    public double getCharge() {
+        return _movie.getCharge(_daysRented);
+    }
+
+    public int getFrequentRenterPoints() {
+        return _movie.getFrequentRenterPoints(_daysRented);
+    }
+}