Не проходит валидацию

package com.javarush.task.task31.task3111;

import java.io.*;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.ArrayList;
import java.util.List;

public class SearchFileVisitor extends SimpleFileVisitor<Path> {
    private String partOfName;
    private String partOfContent;
    private int minSize = -1;
    private int maxSize = -1;
    private List<Path> foundFiles = new ArrayList<>();

    @Override
    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
        if ((partOfName == null || file.getFileName().toString().contains(partOfName)) &&
                (minSize == -1 || file.toFile().length() > minSize) &&
                (maxSize == -1 || file.toFile().length() < maxSize) &&
                (partOfContent == null ||
                        new String(Files.readAllBytes(file)).contains(partOfContent))) {
                    foundFiles.add(file);
            }
        return FileVisitResult.CONTINUE;
    }

    public void setPartOfName(String partOfName) {
        this.partOfName = partOfName;
    }

    public void setPartOfContent(String partOfContent) {
        this.partOfContent = partOfContent;
    }

    public void setMinSize(int minSize) {
        this.minSize = minSize;
    }

    public void setMaxSize(int maxSize) {
        this.maxSize = maxSize;
    }

    public List<Path> getFoundFiles() {
        return foundFiles;
    }
}