style(code): unify formatting across io and search components

app/src/main/java/ru/project/io/StudentCsvReader.java

@@ -13,76 +13,89 @@ import org.apache.commons.csv.CSVParser;
 import org.apache.commons.csv.CSVRecord;
 import ru.project.student.Student;
 import ru.project.student.StudentBuilder;
-  public class StudentCsvReader implements Iterator<Student>, AutoCloseable {
+
+public class StudentCsvReader implements Iterator<Student>, AutoCloseable {
   private static final String GROUP_NUMBER = "groupNumber";
   private static final String AVERAGE_GRADE = "averageGrade";
   private static final String RECORD_BOOK_NUMBER = "recordBookNumber";
   private final CSVParser parser;
   private final Iterator<CSVRecord> records;
-  private int lineOfFile=0;
-    public StudentCsvReader(Path path) {
-      if (!path.isAbsolute()) {
-        throw new IllegalArgumentException("File path must be absolute");
-      }
-      try {
-        CSVFormat format = CSVFormat.DEFAULT.builder()
-                .setHeader()
-                .setSkipHeaderRecord(true)
-                .get();
-        this.parser = CSVParser.parse(path, StandardCharsets.UTF_8, format);
-        validateHeader(parser.getHeaderMap());
-        this.records = parser.iterator();
-      } catch (IOException e) {
-        throw new UncheckedIOException(e);
-      }
+  private int lineOfFile = 0;
+
+  public StudentCsvReader(Path path) {
+    if (!path.isAbsolute()) {
+      throw new IllegalArgumentException("File path must be absolute");
     }
-    @Override
-    public boolean hasNext() {
-      return records.hasNext();
-    }
-    @Override
-    public Student next() {
-      if (!records.hasNext()) {
-        throw new NoSuchElementException("No more records at line " + (lineOfFile + 1));
-      }
-      lineOfFile++;
-      CSVRecord record = records.next();
-      if (record.size() != 3) {
-        throw new IllegalArgumentException(
-                "Problem at line " + lineOfFile + ". Expected 3 columns, but got " + record.size());
-      }
-      String groupNumber = record.get(GROUP_NUMBER);
-      String averageGradeStr = record.get(AVERAGE_GRADE);
-      String recordBookNumberStr = record.get(RECORD_BOOK_NUMBER);
-      double averageGrade;
-      int recordBookNumber;
-      try {
-        averageGrade = Double.parseDouble(averageGradeStr);
-      } catch (NumberFormatException e) {
-        throw new IllegalArgumentException(
-                "Problem at line " + lineOfFile + ": cannot parse averageGrade '" + averageGradeStr + "' as double", e);
-      }
-      try {
-        recordBookNumber = Integer.parseInt(recordBookNumberStr);
-      } catch (NumberFormatException e) {
-        throw new IllegalArgumentException(
-                "Problem at line " + lineOfFile + ": cannot parse recordBookNumber '" + recordBookNumberStr + "' as int", e);
-      }
-      return new StudentBuilder()
-              .setGroupNumber(groupNumber)
-              .setAverageGrade(averageGrade)
-              .setRecordBookNumber(recordBookNumber)
-              .build();
-    }
-    @Override
-    public void close() throws IOException {
-      parser.close();
-    }
-    private static void validateHeader(Map<String, Integer> headerMap) {
-      String[] expected = {GROUP_NUMBER, AVERAGE_GRADE, RECORD_BOOK_NUMBER};
-      if (headerMap.size() != expected.length
-              || !headerMap.keySet().containsAll(Arrays.asList(expected))) {
-        throw new IllegalArgumentException("Invalid CSV header");
-      }
+    try {
+      CSVFormat format = CSVFormat.DEFAULT.builder().setHeader().setSkipHeaderRecord(true).get();
+      this.parser = CSVParser.parse(path, StandardCharsets.UTF_8, format);
+      validateHeader(parser.getHeaderMap());
+      this.records = parser.iterator();
+    } catch (IOException e) {
+      throw new UncheckedIOException(e);
     }
   }
+
+  @Override
+  public boolean hasNext() {
+    return records.hasNext();
+  }
+
+  @Override
+  public Student next() {
+    if (!records.hasNext()) {
+      throw new NoSuchElementException("No more records at line " + (lineOfFile + 1));
+    }
+    lineOfFile++;
+    CSVRecord record = records.next();
+    if (record.size() != 3) {
+      throw new IllegalArgumentException(
+          "Problem at line " + lineOfFile + ". Expected 3 columns, but got " + record.size());
+    }
+    String groupNumber = record.get(GROUP_NUMBER);
+    String averageGradeStr = record.get(AVERAGE_GRADE);
+    String recordBookNumberStr = record.get(RECORD_BOOK_NUMBER);
+    double averageGrade;
+    int recordBookNumber;
+    try {
+      averageGrade = Double.parseDouble(averageGradeStr);
+    } catch (NumberFormatException e) {
+      throw new IllegalArgumentException(
+          "Problem at line "
+              + lineOfFile
+              + ": cannot parse averageGrade '"
+              + averageGradeStr
+              + "' as double",
+          e);
+    }
+    try {
+      recordBookNumber = Integer.parseInt(recordBookNumberStr);
+    } catch (NumberFormatException e) {
+      throw new IllegalArgumentException(
+          "Problem at line "
+              + lineOfFile
+              + ": cannot parse recordBookNumber '"
+              + recordBookNumberStr
+              + "' as int",
+          e);
+    }
+    return new StudentBuilder()
+        .setGroupNumber(groupNumber)
+        .setAverageGrade(averageGrade)
+        .setRecordBookNumber(recordBookNumber)
+        .build();
+  }
+
+  @Override
+  public void close() throws IOException {
+    parser.close();
+  }
+
+  private static void validateHeader(Map<String, Integer> headerMap) {
+    String[] expected = {GROUP_NUMBER, AVERAGE_GRADE, RECORD_BOOK_NUMBER};
+    if (headerMap.size() != expected.length
+        || !headerMap.keySet().containsAll(Arrays.asList(expected))) {
+      throw new IllegalArgumentException("Invalid CSV header");
+    }
+  }
+}

app/src/main/java/ru/project/search/AverageGradeRangeCriteria.java

@@ -3,20 +3,20 @@ package ru.project.search;
 import ru.project.student.Student;
 
 public class AverageGradeRangeCriteria implements StudentSearchCriteria {
-    private final double min;
-    private final double max;
+  private final double min;
+  private final double max;
 
-    public AverageGradeRangeCriteria(double min, double max) {
-        if (min > max) {
-            throw new IllegalArgumentException("Min grade must be <= max grade");
-        }
-        this.min = min;
-        this.max = max;
+  public AverageGradeRangeCriteria(double min, double max) {
+    if (min > max) {
+      throw new IllegalArgumentException("Min grade must be <= max grade");
     }
+    this.min = min;
+    this.max = max;
+  }
 
-    @Override
-    public boolean matches(Student student) {
-        double grade = student.getAverageGrade();
-        return grade >= min && grade <= max;
-    }
+  @Override
+  public boolean matches(Student student) {
+    double grade = student.getAverageGrade();
+    return grade >= min && grade <= max;
+  }
 }

app/src/main/java/ru/project/search/CompositeStudentSearchCriteria.java

@@ -1,51 +1,51 @@
 package ru.project.search;
 
-import ru.project.student.Student;
 import java.util.ArrayList;
 import java.util.List;
+import ru.project.student.Student;
 
 public class CompositeStudentSearchCriteria implements StudentSearchCriteria {
-    private final SearchOperation operation;
-    private final List<StudentSearchCriteria> criteriaList = new ArrayList<>();
+  private final SearchOperation operation;
+  private final List<StudentSearchCriteria> criteriaList = new ArrayList<>();
 
-    public CompositeStudentSearchCriteria(SearchOperation operation) {
-        if (operation == null) {
-            throw new IllegalArgumentException("Operation must not be null");
-        }
-        this.operation = operation;
+  public CompositeStudentSearchCriteria(SearchOperation operation) {
+    if (operation == null) {
+      throw new IllegalArgumentException("Operation must not be null");
+    }
+    this.operation = operation;
+  }
+
+  public void add(StudentSearchCriteria criteria) {
+    if (criteria == null) {
+      throw new IllegalArgumentException("Criteria must not be null");
+    }
+    criteriaList.add(criteria);
+  }
+
+  public void remove(StudentSearchCriteria criteria) {
+    criteriaList.remove(criteria);
+  }
+
+  @Override
+  public boolean matches(Student student) {
+    if (criteriaList.isEmpty()) {
+      return operation == SearchOperation.INTERSECTION;
     }
 
-    public void add(StudentSearchCriteria criteria) {
-        if (criteria == null) {
-            throw new IllegalArgumentException("Criteria must not be null");
+    if (operation == SearchOperation.UNION) {
+      for (StudentSearchCriteria c : criteriaList) {
+        if (c.matches(student)) {
+          return true;
         }
-        criteriaList.add(criteria);
-    }
-
-    public void remove(StudentSearchCriteria criteria) {
-        criteriaList.remove(criteria);
-    }
-
-    @Override
-    public boolean matches(Student student) {
-        if (criteriaList.isEmpty()) {
-            return operation == SearchOperation.INTERSECTION;
-        }
-
-        if (operation == SearchOperation.UNION) {
-            for (StudentSearchCriteria c : criteriaList) {
-                if (c.matches(student)) {
-                    return true;
-                }
-            }
-            return false;
-        } else {
-            for (StudentSearchCriteria c : criteriaList) {
-                if (!c.matches(student)) {
-                    return false;
-                }
-            }
-            return true;
+      }
+      return false;
+    } else {
+      for (StudentSearchCriteria c : criteriaList) {
+        if (!c.matches(student)) {
+          return false;
         }
+      }
+      return true;
     }
+  }
 }

app/src/main/java/ru/project/search/GroupNumberRangeCriteria.java

@@ -3,23 +3,23 @@ package ru.project.search;
 import ru.project.student.Student;
 
 public class GroupNumberRangeCriteria implements StudentSearchCriteria {
-    private final String min;
-    private final String max;
+  private final String min;
+  private final String max;
 
-    public GroupNumberRangeCriteria(String min, String max) {
-        if (min == null || max == null) {
-            throw new IllegalArgumentException("Min and max must not be null");
-        }
-        if (min.compareTo(max) > 0) {
-            throw new IllegalArgumentException("Min group must be <= max group");
-        }
-        this.min = min;
-        this.max = max;
+  public GroupNumberRangeCriteria(String min, String max) {
+    if (min == null || max == null) {
+      throw new IllegalArgumentException("Min and max must not be null");
     }
+    if (min.compareTo(max) > 0) {
+      throw new IllegalArgumentException("Min group must be <= max group");
+    }
+    this.min = min;
+    this.max = max;
+  }
 
-    @Override
-    public boolean matches(Student student) {
-        String group = student.getGroupNumber();
-        return group.compareTo(min) >= 0 && group.compareTo(max) <= 0;
-    }
+  @Override
+  public boolean matches(Student student) {
+    String group = student.getGroupNumber();
+    return group.compareTo(min) >= 0 && group.compareTo(max) <= 0;
+  }
 }

app/src/main/java/ru/project/search/RecordBookNumberRangeCriteria.java

@@ -3,20 +3,20 @@ package ru.project.search;
 import ru.project.student.Student;
 
 public class RecordBookNumberRangeCriteria implements StudentSearchCriteria {
-    private final int min;
-    private final int max;
+  private final int min;
+  private final int max;
 
-    public RecordBookNumberRangeCriteria(int min, int max) {
-        if (min > max) {
-            throw new IllegalArgumentException("Min record number must be <= max");
-        }
-        this.min = min;
-        this.max = max;
+  public RecordBookNumberRangeCriteria(int min, int max) {
+    if (min > max) {
+      throw new IllegalArgumentException("Min record number must be <= max");
     }
+    this.min = min;
+    this.max = max;
+  }
 
-    @Override
-    public boolean matches(Student student) {
-        int number = student.getRecordBookNumber();
-        return number >= min && number <= max;
-    }
+  @Override
+  public boolean matches(Student student) {
+    int number = student.getRecordBookNumber();
+    return number >= min && number <= max;
+  }
 }

app/src/main/java/ru/project/search/SearchOperation.java

@@ -1,6 +1,6 @@
 package ru.project.search;
 
 public enum SearchOperation {
-    UNION,
-    INTERSECTION
+  UNION,
+  INTERSECTION
 }

app/src/main/java/ru/project/search/StudentSearchCriteria.java

@@ -3,5 +3,5 @@ package ru.project.search;
 import ru.project.student.Student;
 
 public interface StudentSearchCriteria {
-    boolean matches(Student student);
+  boolean matches(Student student);
 }

app/src/test/java/ru/project/io/StudentCsvReaderTest.java

@@ -1,4 +1,7 @@
 package ru.project.io;
+
+import static org.junit.jupiter.api.Assertions.*;
+
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
@@ -8,111 +11,106 @@ import java.util.Spliterators;
 import java.util.stream.StreamSupport;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.io.TempDir;
-import ru.project.student.Student;
 import ru.project.collection.MyList;
 import ru.project.collectors.MyCollectors;
-import static org.junit.jupiter.api.Assertions.*;
+import ru.project.student.Student;
+
 class StudentCsvReaderTest {
-    @TempDir
-    Path tempDir;
-    @Test
-    void shouldTestreadValidCsvIntoMyList() throws IOException {
-        Path csv = tempDir.resolve("students.csv");
-        String content = String.join("\n",
-                "groupNumber,averageGrade,recordBookNumber",
-                "M10,4.5,12345",
-                "B05,3.8,12346"
-        );
-        Files.writeString(csv, content, StandardCharsets.UTF_8);
-        try (var reader = new StudentCsvReader(csv.toAbsolutePath())) {
-            var studentStream = StreamSupport.stream(
-                    Spliterators.spliteratorUnknownSize(reader, 0),
-                    false
-            );
-            MyList<Student> students = studentStream
-                    .collect(MyCollectors.toMyList());
-            assertEquals(2, students.size());
-            assertEquals("M10", students.get(0).getGroupNumber());
-            assertEquals(4.5, students.get(0).getAverageGrade(), 0.0);
-            assertEquals(12345, students.get(0).getRecordBookNumber());
-            assertEquals("B05", students.get(1).getGroupNumber());
-            assertEquals(3.8, students.get(1).getAverageGrade(), 0.0);
-            assertEquals(12346, students.get(1).getRecordBookNumber());
-        }
-    }
-    @Test
-    void shouldTestinvalidHeaderThrowsException() throws IOException {
-        Path csv = tempDir.resolve("bad-header.csv");
-        String content = """
-                badGroup,badGrade,badBook
-                M101,4.5,12345
-                """;
-        Files.writeString(csv, content, StandardCharsets.UTF_8);
-        IllegalArgumentException ex = assertThrows(
-                IllegalArgumentException.class,
-                () -> new StudentCsvReader(csv.toAbsolutePath())
-        );
-        assertTrue(ex.getMessage().contains("Invalid CSV header"));
-    }
-    @Test
-    void shouldTestwrongColumnCountThrowsException() throws IOException {
-        Path csv = tempDir.resolve("wrong-columns.csv");
-        String content = """
-                groupNumber,averageGrade,recordBookNumber
-                M101,4.5
-                """;
-        Files.writeString(csv, content, StandardCharsets.UTF_8);
-        try (var reader = new StudentCsvReader(csv.toAbsolutePath())) {
-            assertTrue(reader.hasNext());
+  @TempDir Path tempDir;
 
-            IllegalArgumentException ex = assertThrows(
-                    IllegalArgumentException.class,
-                    reader::next
-            );
-            assertTrue(ex.getMessage().contains("Expected 3 columns"));
-        }
+  @Test
+  void shouldTestreadValidCsvIntoMyList() throws IOException {
+    Path csv = tempDir.resolve("students.csv");
+    String content =
+        String.join(
+            "\n", "groupNumber,averageGrade,recordBookNumber", "M10,4.5,12345", "B05,3.8,12346");
+    Files.writeString(csv, content, StandardCharsets.UTF_8);
+    try (var reader = new StudentCsvReader(csv.toAbsolutePath())) {
+      var studentStream =
+          StreamSupport.stream(Spliterators.spliteratorUnknownSize(reader, 0), false);
+      MyList<Student> students = studentStream.collect(MyCollectors.toMyList());
+      assertEquals(2, students.size());
+      assertEquals("M10", students.get(0).getGroupNumber());
+      assertEquals(4.5, students.get(0).getAverageGrade(), 0.0);
+      assertEquals(12345, students.get(0).getRecordBookNumber());
+      assertEquals("B05", students.get(1).getGroupNumber());
+      assertEquals(3.8, students.get(1).getAverageGrade(), 0.0);
+      assertEquals(12346, students.get(1).getRecordBookNumber());
     }
-    @Test
-    void shouldTestparseErrorThrowsExceptionWithDetails() throws IOException {
-        Path csv = tempDir.resolve("parse-error.csv");
-        String content = """
-                groupNumber,averageGrade,recordBookNumber
-                M101,not-a-number,12345
-                """;
-        Files.writeString(csv, content, StandardCharsets.UTF_8);
-        try (var reader = new StudentCsvReader(csv.toAbsolutePath())) {
-            assertTrue(reader.hasNext());
+  }
 
-            IllegalArgumentException ex = assertThrows(
-                    IllegalArgumentException.class,
-                    reader::next
-            );
-            assertTrue(ex.getMessage().contains("cannot parse averageGrade"));
-        }
-    }
-    @Test
-    void shouldTestemptyDataAfterHeaderThrowsNoSuchElement() throws IOException {
-        Path csv = tempDir.resolve("empty-data.csv");
-        String content = """
-                groupNumber,averageGrade,recordBookNumber
-                """;
-        Files.writeString(csv, content, StandardCharsets.UTF_8);
+  @Test
+  void shouldTestinvalidHeaderThrowsException() throws IOException {
+    Path csv = tempDir.resolve("bad-header.csv");
+    String content =
+        """
+        badGroup,badGrade,badBook
+        M101,4.5,12345
+        """;
+    Files.writeString(csv, content, StandardCharsets.UTF_8);
+    IllegalArgumentException ex =
+        assertThrows(
+            IllegalArgumentException.class, () -> new StudentCsvReader(csv.toAbsolutePath()));
+    assertTrue(ex.getMessage().contains("Invalid CSV header"));
+  }
 
-        // ИСПРАВЛЕНО: добавлен try-with-resources
-        try (var reader = new StudentCsvReader(csv.toAbsolutePath())) {
-            assertFalse(reader.hasNext());
+  @Test
+  void shouldTestwrongColumnCountThrowsException() throws IOException {
+    Path csv = tempDir.resolve("wrong-columns.csv");
+    String content =
+        """
+        groupNumber,averageGrade,recordBookNumber
+        M101,4.5
+        """;
+    Files.writeString(csv, content, StandardCharsets.UTF_8);
+    try (var reader = new StudentCsvReader(csv.toAbsolutePath())) {
+      assertTrue(reader.hasNext());
 
-            assertThrows(NoSuchElementException.class, reader::next);
-        }
+      IllegalArgumentException ex = assertThrows(IllegalArgumentException.class, reader::next);
+      assertTrue(ex.getMessage().contains("Expected 3 columns"));
     }
-    @Test
-    void shouldTestrelativePathThrowsException() {
-        Path relative = Path.of("relative-path.csv");
+  }
 
-        IllegalArgumentException ex = assertThrows(
-                IllegalArgumentException.class,
-                () -> new StudentCsvReader(relative)
-        );
-        assertTrue(ex.getMessage().contains("absolute"));
+  @Test
+  void shouldTestparseErrorThrowsExceptionWithDetails() throws IOException {
+    Path csv = tempDir.resolve("parse-error.csv");
+    String content =
+        """
+        groupNumber,averageGrade,recordBookNumber
+        M101,not-a-number,12345
+        """;
+    Files.writeString(csv, content, StandardCharsets.UTF_8);
+    try (var reader = new StudentCsvReader(csv.toAbsolutePath())) {
+      assertTrue(reader.hasNext());
+
+      IllegalArgumentException ex = assertThrows(IllegalArgumentException.class, reader::next);
+      assertTrue(ex.getMessage().contains("cannot parse averageGrade"));
     }
+  }
+
+  @Test
+  void shouldTestemptyDataAfterHeaderThrowsNoSuchElement() throws IOException {
+    Path csv = tempDir.resolve("empty-data.csv");
+    String content =
+        """
+        groupNumber,averageGrade,recordBookNumber
+        """;
+    Files.writeString(csv, content, StandardCharsets.UTF_8);
+
+    // ИСПРАВЛЕНО: добавлен try-with-resources
+    try (var reader = new StudentCsvReader(csv.toAbsolutePath())) {
+      assertFalse(reader.hasNext());
+
+      assertThrows(NoSuchElementException.class, reader::next);
     }
+  }
+
+  @Test
+  void shouldTestrelativePathThrowsException() {
+    Path relative = Path.of("relative-path.csv");
+
+    IllegalArgumentException ex =
+        assertThrows(IllegalArgumentException.class, () -> new StudentCsvReader(relative));
+    assertTrue(ex.getMessage().contains("absolute"));
+  }
+}