first commit

Semester 1/Programming 1/Java/examples/projects/chapter16/taxi-company-outline/PassengerSource.java

@@ -0,0 +1,44 @@
+/**
+ * Simulate passengers requesting rides from a taxi company.
+ * Passengers should be generated at random intervals.
+ * 
+ * @author David J. Barnes and Michael Kölling
+ * @version 2016.02.29
+ */
+public class PassengerSource
+{
+    private TaxiCompany company;
+
+    /**
+     * Constructor for objects of class PassengerSource.
+     * @param company The company to be used. Must not be null.
+     * @throws NullPointerException if company is null.
+     */
+    public PassengerSource(TaxiCompany company)
+    {
+        if(company == null) {
+            throw new NullPointerException("company");
+        }
+        this.company = company;
+    }
+
+    /**
+     * Have the source generate a new passenger and
+     * request a pickup from the company.
+     * @return true If the request succeeds, false otherwise.
+     */
+    public boolean requestPickup()
+    {
+        Passenger passenger = createPassenger();
+        return company.requestPickup(passenger);
+    }
+
+    /**
+     * Create a new passenger.
+     * @return The created passenger.
+     */
+    private Passenger createPassenger()
+    {
+        return new Passenger(new Location(), new Location());
+    }
+}