Changed the way how tasks are created

Dockerfile

@@ -11,7 +11,7 @@ RUN mkdir -p $WEBPATH
 COPY src/ $WEBPATH
 WORKDIR $WEBPATH
 
-RUN javac *.java
+RUN javac *.java task/*.java
 
 EXPOSE 8000
 

README.md

@@ -37,27 +37,12 @@ import task.TaskImpl;
 
 public class TaskHello extends TaskImpl {
 
-    public TaskHello(String input) {
-        super(input);
-    }
-
     @Override
     public void execute() {
         result = "Hello " + input;
     }
 }
 ```
-* Change `singleton/TaskExecutor.java` by adding a new "case" in the switch-case context for your task.
-
-Example:
-```
-    ...
-    case "TaskHello":
-        task = new TaskHello(input);
-        break;
-    default:
-    ...
-```
 * When the project is compiled, up and running, the task can be called like:
 `curl -d TaskHello -d World http://localhost:8000/`
 

src/singleton/TaskExecutor.java

@@ -12,34 +12,23 @@ public enum TaskExecutor {
     //Singleton
     INSTANCE;
 
+    public static final String TASKS_PACKAGE = "task.";
+
     public String run(String parameters) {
-        Task task;
+        String taskName, input = "";
 
         List<String> list = Arrays.stream(parameters.split("&")).collect(Collectors.toList());
 
         long start = System.currentTimeMillis();
         if (list.size() != 2) {
-            task = new TaskIncorrectParams("");
+            taskName = "TaskIncorrectParams";
         } else {
-            String taskName = list.get(0);
-            String input = list.get(1);
-
-            switch (taskName) {
-                case "TaskBubbleSort":
-                    task = new TaskBubbleSort(input);
-                    break;
-                case "TaskFiboRecursive":
-                    task = new TaskFiboRecursive(input);
-                    break;
-                case "TaskBitcoin":
-                    task = new TaskBitcoin(input);
-                    break;
-                default:
-                    task = new TaskNotFound("");
-                    break;
+            taskName = list.get(0);
+            input = list.get(1);
         }
+        Task task = createTask(taskName);
+        task.setInput(input);
         task.execute();
-        }
 
         TasksList.INSTANCE.add(task);
         long end = System.currentTimeMillis();
@@ -48,4 +37,18 @@ public enum TaskExecutor {
 
         return task.getResult();
     }
+
+    private Task createTask(String className) {
+        Task task = null;
+        try {
+            task = (Task)Class.forName(TASKS_PACKAGE + className).newInstance();
+        } catch (Exception e) {
+            try {
+                task = (Task)Class.forName(TASKS_PACKAGE + "TaskNotFound").newInstance();
+            } catch (Exception e1) {
+                e1.printStackTrace();
+            }
+        }
+        return task;
+    }
 }

src/task/Task.java

@@ -4,6 +4,8 @@ public interface Task {
 
     String getInput();
 
+    void setInput(String input);
+
     void execute();
 
     void setExecutedTime(String executedTime);

src/task/TaskBitcoin.java

@@ -10,10 +10,6 @@ import java.util.List;
 
 public class TaskBitcoin extends TaskImpl {
 
-    public TaskBitcoin(String input) {
-        super(input);
-    }
-
     @Override
     public void execute() {
         try {

src/task/TaskBubbleSort.java

@@ -5,10 +5,6 @@ import java.util.StringJoiner;
 
 public class TaskBubbleSort extends TaskImpl {
 
-    public TaskBubbleSort(String input) {
-        super(input);
-    }
-
     @Override
     public void execute() {
         String[] stringArray = input.split(",");

src/task/TaskFiboRecursive.java

@@ -2,10 +2,6 @@ package task;
 
 public class TaskFiboRecursive extends TaskImpl {
 
-    public TaskFiboRecursive(String input) {
-        super(input);
-    }
-
     @Override
     public void execute() {
         try {

src/task/TaskImpl.java

@@ -6,15 +6,16 @@ public abstract class TaskImpl implements Task {
     protected String result;
     protected String executedTime;
 
-    public TaskImpl(String input) {
-        this.input = input;
-    }
-
     @Override
     public String getInput() {
         return input;
     }
 
+    @Override
+    public void setInput(String input) {
+        this.input = input;
+    }
+
     @Override
     public String getResult() {
         return "Result: " + result + "; Executed in: " + executedTime + "\n";

src/task/TaskIncorrectParams.java

@@ -2,10 +2,6 @@ package task;
 
 public final class TaskIncorrectParams extends TaskImpl {
 
-    public TaskIncorrectParams(String input) {
-        super(input);
-    }
-
     @Override
     public void execute() { }
 

src/task/TaskNotFound.java

@@ -2,10 +2,6 @@ package task;
 
 public final class TaskNotFound extends TaskImpl {
 
-    public TaskNotFound(String input) {
-        super(input);
-    }
-
     @Override
     public void execute() { }