implemented pecs

src/main/java/core/mate/academy/model/BulldozerProducer.java

@@ -0,0 +1,11 @@
+package core.mate.academy.model;
+
+import core.mate.academy.service.MachineProducer;
+import java.util.List;
+
+public class BulldozerProducer implements MachineProducer<Bulldozer> {
+ @Override
+ public List<Bulldozer> get() {
+ return List.of(new Bulldozer());
+ }
+}

src/main/java/core/mate/academy/model/ExcavatorProducer.java

@@ -0,0 +1,11 @@
+package core.mate.academy.model;
+
+import core.mate.academy.service.MachineProducer;
+import java.util.List;
+
+public class ExcavatorProducer implements MachineProducer<Excavator> {
+ @Override
+ public List<Excavator> get() {
+ return List.of(new Excavator());
+ }
+}

src/main/java/core/mate/academy/model/Truck.java

@@ -1,9 +1,11 @@
+
 package core.mate.academy.model;
 
 /**
  * Add some custom fields that could be only in Truck
  * Do not remove no-field constructor
  */
+
 public class Truck extends Machine {
  public Truck() {
  }

src/main/java/core/mate/academy/model/TruckProducer.java

@@ -0,0 +1,11 @@
+package core.mate.academy.model;
+
+import core.mate.academy.service.MachineProducer;
+import java.util.List;
+
+public class TruckProducer implements MachineProducer<Truck> {
+ @Override
+ public List<Truck> get() {
+ return List.of(new Truck());
+ }
+}

src/main/java/core/mate/academy/service/MachineProducer.java

@@ -2,10 +2,10 @@
 
 import java.util.List;
 
-public interface MachineProducer {
+public interface MachineProducer<T> {
  /**
  * In your implementations - create 2-3 models, add them to the list and return
  * @return - the list of models
  */
- List<Object> get();
+ List<T> get();
 }

src/main/java/core/mate/academy/service/MachineService.java

@@ -1,12 +1,13 @@
 package core.mate.academy.service;
 
+import core.mate.academy.model.Machine;
 import java.util.List;
 
 /**
  * Parameterize this service and add its implementation in a separate class.
  */
-public interface MachineService {
 
+public interface MachineService<T> {
  /**
  * Return the list of machines.
  * In the implementation of this method please use your MachineProducer implementations
@@ -16,7 +17,7 @@ public interface MachineService {
  * @param type - any class of Machine sub class. For example: Truck.class or Bulldozer.class
  * @return the list of machines
  */
- List<Object> getAll(Class type);
+ List<T> getAll(Class<? extends T> type);
 
  /**
  * Fill the machines list with passed value
@@ -26,13 +27,13 @@ public interface MachineService {
  * @param machines - list of machines to be filled with value
  * @param value - any object of machine sub class
  */
- void fill(List<Object> machines, Object value);
+ void fill(List<Object> machines, Machine value);
 
  /**
  * Call the method doWork() from each machine.
  * This method should be able to accept a list of bulldozers as well as list of trucks.
  *
  * @param machines - the list of machines
  */
- void startWorking(List<Object> machines);
+ void startWorking(List<? extends Machine> machines);
 }

src/main/java/core/mate/academy/service/MachineServiceImpl.java

@@ -1,7 +1,44 @@
 package core.mate.academy.service;
 
+import core.mate.academy.model.Bulldozer;
+import core.mate.academy.model.BulldozerProducer;
+import core.mate.academy.model.Excavator;
+import core.mate.academy.model.ExcavatorProducer;
+import core.mate.academy.model.Machine;
+import core.mate.academy.model.Truck;
+import core.mate.academy.model.TruckProducer;
+import java.util.ArrayList;
+import java.util.List;
+
 /**
  * Your implementation of MachineService.
  */
-public class MachineServiceImpl {
+public class MachineServiceImpl<T extends Machine> implements MachineService<T> {
+ @SuppressWarnings("unchecked")
+ @Override
+ public List<T> getAll(Class<? extends T> type) {
+ List<T> machines = new ArrayList<>();
+
+ if (Truck.class.isAssignableFrom(type)) {
+ machines.addAll((List<T>) new TruckProducer().get());
+ } else if (Bulldozer.class.isAssignableFrom(type)) {
+ machines.addAll((List<T>) new BulldozerProducer().get());
+ } else if (Excavator.class.isAssignableFrom(type)) {
+ machines.addAll((List<T>) new ExcavatorProducer().get());
+ }
+
+ return machines;
+ }
+
+ @Override
+ public void fill(List<Object> machines, Machine value) {
+ machines.replaceAll(ignored -> value);
+ }
+
+ @Override
+ public void startWorking(List<? extends Machine> machines) {
+ for (Machine machine : machines) {
+ machine.doWork();
+ }
+ }
 }