java-arch-6.java

public class SomeClass {
  
  XmlParser xmlParser;

  public SomeClass(XmlParser xmlParser) {
    this.xmlParser = xmlParser;
  }

  public List<Book> findSpecificBookInFile(String bookName, String filePath) {
      List<Book> fromFile = xmlParser.parseBooks(fileName);

      return fromFile.stream()
                .filter(book -> bookName.equals(book.title()))
                .findFirst()
                .orElse(Book.NULL);
  }
}