feat: add StringParser and reworking project structure

app/src/main/java/ru/project/DataSource.java

@@ -1,3 +0,0 @@
-public interface DataSource {
-    MyList<Student> fill(int size);
-}

app/src/main/java/ru/project/FileDataSource.java

@@ -1,16 +0,0 @@
-public class FileDataSource implements DataSource{
-    private String path;
-
-    public FileDataSource(String path) {
-        this.path = path;
-    }
-
-    public void setPath(String path) {
-        this.path = path;
-    }
-
-    @Override
-    public MyList<Student> fill(int size) {
-        return null;
-    }
-}

app/src/main/java/ru/project/Main.java

@@ -1,15 +0,0 @@
-//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
-// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
-public class Main {
-    public static void main(String[] args) {
-        //TIP Press <shortcut actionId="ShowIntentionActions"/> with your caret at the highlighted text
-        // to see how IntelliJ IDEA suggests fixing it.
-        System.out.printf("Hello and welcome!");
-
-        for (int i = 1; i <= 5; i++) {
-            //TIP Press <shortcut actionId="Debug"/> to start debugging your code. We have set one <icon src="AllIcons.Debugger.Db_set_breakpoint"/> breakpoint
-            // for you, but you can always add more by pressing <shortcut actionId="ToggleLineBreakpoint"/>.
-            System.out.println("i = " + i);
-        }
-    }
-}

app/src/main/java/ru/project/ManualDataSource.java

@@ -1,16 +0,0 @@
-import java.util.Scanner;
-
-public class ManualDataSource implements DataSource{
-    @Override
-    public MyList<Student> fill(int size) {
-        String strToParse;
-        Scanner scanner = new Scanner(System.in);
-        while(true){
-            strToParse = scanner.next();
-            if (strToParse.equals("0"))
-                break;
-        }
-        scanner.close();
-        return null;
-    }
-}

app/src/main/java/ru/project/MyList.java

@@ -1,2 +0,0 @@
-public class MyList <T>{
-}

app/src/main/java/ru/project/Student.java

@@ -1,11 +0,0 @@
-public class Student {
-    private final String groupNumber;
-    private final double averageGrade;
-    private final String recordBookNumber;
-
-    public Student(String groupNumber, double averageGrade, String recordBookNumber) {
-        this.groupNumber = groupNumber;
-        this.averageGrade = averageGrade;
-        this.recordBookNumber = recordBookNumber;
-    }
-}

app/src/main/java/ru/project/StudentBuilder.java

@@ -1,23 +0,0 @@
-public class StudentBuilder {
-    private String groupNumber;
-    private double averageGrade;
-    private String recordBookNumber;
-
-    public void setGroupNumber(String groupNumber) {
-        this.groupNumber = groupNumber;
-    }
-
-    public void setAverageGrade(double averageGrade) {
-        this.averageGrade = averageGrade;
-    }
-
-    public void setRecordBookNumber(String recordBookNumber) {
-        this.recordBookNumber = recordBookNumber;
-    }
-
-    public Student build(){
-        //TODO: Реализовать проверку на корректность введенных значений
-
-        return new Student(groupNumber,averageGrade, recordBookNumber);
-    }
-}

app/src/main/java/ru/project/datasource/DataSource.java

@@ -0,0 +1,9 @@
+package ru.project.datasource;
+
+import ru.project.student.Student;
+import ru.project.collection.MyList;
+
+
+public interface DataSource {
+    MyList<Student> fill(int size);
+}

app/src/main/java/ru/project/datasource/FileDataSource.java

@@ -7,34 +7,36 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.stream.Collector;
-import java.util.NoSuchElementException;
 import ru.project.student.Student;
 import ru.project.collection.MyList;
-import ru.project.collection.MyLinkedList;
 
 public class FileDataSource implements DataSource{
-    private final String fileName;
+    private String fileName;
 
     public FileDataSource(String fileName) {
         this.fileName = fileName;
     }
 
+    public void setFileName(String fileName) {
+        this.fileName = fileName;
+    }
+
     @Override
-    public MyList<Student> create() {
-        MyList<Student> resultList = new MyLinkedList<>();
-        try {
-            StudentCsvReader reader = new StudentCsvReader(fileName);
-            while reader.hasNext() {
-                result.append(reader.next());
-            }
-        }
-        catch (IllegalArgumentException e){
-            System.out.println(e.getMessage());
-            return null;
-        }
-        catch (NoSuchElementException e){
-            System.out.println("No such element");
+    public MyList<Student> fill(int size) {
+        Path path = Paths.get(fileName);
+        try(var lines = Files.lines(path)){
+            return lines.skip(1)
+                    .limit(size)
+                    .map(e -> StringParser.parseString(e))
+                    .filter(e -> !(e == null))
+                    .collect(Collector.of(MyList::new,
+                            MyList::add,
+                            (left, right) -> left.addAll(right)));
+        }catch(FileNotFoundException e){
+            System.out.println("File not found.");
             return null;
+        } catch (IOException e) {
+            throw new RuntimeException(e);
         }
     }
 }

app/src/main/java/ru/project/datasource/ManualDataSource.java

@@ -0,0 +1,29 @@
+package ru.project.datasource;
+
+import java.util.Scanner;
+import ru.project.student.Student;
+import ru.project.collection.MyList;
+
+public class ManualDataSource implements DataSource{
+    @Override
+    public MyList<Student> fill(int size) {
+        MyList<Student> result = new MyList<>();
+        String strToParse;
+        Student student;
+        Scanner scanner = new Scanner(System.in);
+        for (short i = 0; i < size; i++){
+            strToParse = scanner.next();
+            if (strToParse.equals("0"))
+                break;
+            student = StringParser.parseString(strToParse);
+            if (student == null){
+                System.out.println("Oops! Invalid input");
+            }
+            else{
+                result.add(student);
+            }
+        }
+        scanner.close();
+        return null;
+    }
+}

app/src/main/java/ru/project/datasource/RandomDataSource.java

@@ -1,3 +1,8 @@
+package ru.project.datasource;
+
+import ru.project.student.Student;
+import ru.project.collection.MyList;
+
 public class RandomDataSource implements  DataSource{
     @Override
     public MyList<Student> fill(int size) {

app/src/main/java/ru/project/datasource/StringParser.java

@@ -0,0 +1,20 @@
+package ru.project.datasource;
+
+import ru.project.student.Student;
+import ru.project.student.StudentBuilder;
+import ru.project.collection.MyList;
+
+public class StringParser {
+    public static Student parseString(String str){
+        String [] parts = str.split(";");
+        try{
+            return new StudentBuilder()
+                    .setGroupNumber(parts[0])
+                    .setAverageGrade(Double.valueOf(parts[1]))
+                    .setRecordBookNumber(parts[2])
+                    .build();
+        }catch(NumberFormatException e){
+            return null;
+        }
+    }
+}