SearchFileVisitor

package com.javarush.task.task31.task3111;


import java.io.IOException;
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;
    private int maxSize;
    private List<Path> foundFiles = new ArrayList<>();

    private boolean needPartOfName = false;
    private boolean needPartOfContent = false;
    private boolean needMinSize = false;
    private boolean needMaxSize = false;


    public void setPartOfName(String partOfName) {
        this.partOfName = partOfName;
        this.needPartOfName = true;
    }
    public void setPartOfContent(String partOfContent) {
        this.partOfContent = partOfContent;
        this.needPartOfContent = true;
    }
    public void setMinSize(int minSize) {
        this.minSize = minSize;
        this.needMinSize = true;
    }
    public void setMaxSize(int maxSize) {
        this.maxSize = maxSize;
        this.needMaxSize = true;
    }

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

    @Override
    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {

        byte[] content = Files.readAllBytes(file); // размер файла: content.length

        if(needPartOfName && !(file.getFileName().toString().contains(partOfName))) {
            return FileVisitResult.CONTINUE;
        }

        if(needPartOfContent) {
            String s = new String(content);
            if (!s.contains(partOfContent)) {
                return FileVisitResult.CONTINUE;
            }
        }

        if (needMinSize && (content.length <= minSize)) {
            return FileVisitResult.CONTINUE;
        }

        if (needMaxSize && (content.length >= maxSize)) {
            return FileVisitResult.CONTINUE;
        }

        foundFiles.add(file);

        return super.visitFile(file, attrs);
    }
}