PreparedFoldersMapFileSystem - Prepares folders as Map<String, Folder<File>>, where key is full folder name, and value is the folder with files.

public PreparedFoldersMapFileSystem(PreparedFolders<Map<String, List<File>>> prepFolders)

PreparedFolders<Map<String, List<File>>> prepFolders - Prepares folders as Map<String, List<File>>, where key is full folder name, and value is the list of folder files.

List<File> files = new ArrayList<>();
files.add("/home/file1.txt");
files.add("/home/file2.txt");
files.add("/home/root1.txt");
files.add("/home/root2.txt");
files.add("/home/root3.txt");
files.add("/home/folder1/file1.txt");
files.add("/home/folder1/file2.txt");
files.add("/home/folder2/file1.txt");

PreparedFolders<Map<String, Folder<File>>> prepFolders = new PreparedFoldersMapFileSystem(
         new PreparedFoldersMapFilesRaw(files)
);

Map<String, Folder<File>> mapFile = prepFolders.preparation();
mapFile.forEach((fullFolderName, prFolder) -> {
        System.out.println(fullFolderName);
        Folder<File> folder = prFolder.fullName();
        prFolder.files().forEach(file -> System.out.println("\t" + file.getName()));
    }
);