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

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+import java.util.Iterator;
+import java.util.List;
+import java.util.LinkedList;
+
+/**
+ * Model the operation of a taxi company, operating different
+ * types of vehicle.
+ * 
+ * @author David J. Barnes and Michael Kölling
+ * @version 2016.02.29
+ */
+public class TaxiCompany  
+{
+    private List<Vehicle> vehicles;
+
+    /**
+     * Constructor for objects of class TaxiCompany
+     */
+    public TaxiCompany()
+    {
+        vehicles = new LinkedList<>();
+    }
+
+    /**
+     * Request a pickup for the given passenger.
+     * @param passenger The passenger requesting a pickup.
+     * @return Whether a free vehicle is available.
+     */
+    public boolean requestPickup(Passenger passenger)
+    {
+        Vehicle vehicle = scheduleVehicle();
+        if(vehicle != null) {
+            vehicle.setPickupLocation(passenger.getPickupLocation());
+            return true;
+        }
+        else {
+            return false;
+        }
+    }
+    
+    /**
+     * A vehicle has arrived at a pickup point.
+     * @param vehicle The vehicle at the pickup point.
+     */
+    public void arrivedAtPickup(Vehicle vehicle)
+    {
+    }
+    
+    /**
+     * A vehicle has arrived at a passenger's destination.
+     * @param vehicle The vehicle at the destination.
+     * @param passenger The passenger being dropped off.
+     */
+    public void arrivedAtDestination(Vehicle vehicle,
+                                     Passenger passenger)
+    {
+    }
+    
+    /**
+     * Find a free vehicle, if any.
+     * @return A free vehicle, or null if there is none.
+     */
+    private Vehicle scheduleVehicle()
+    {
+        Iterator<Vehicle> it = vehicles.iterator();
+        while(it.hasNext()) {
+            Vehicle vehicle = it.next();
+            if(vehicle.isFree()) {
+                return vehicle;
+            }
+        }
+        return null;
+    }
+}