Improve extract() method

[ntalbs]

ood-interview/file_search/filesearch/filesystem/File.java

Lines 27 to 41 in bce98e5

	switch (attributeName) {
	case SIZE -> {
	return size;
	}
	case OWNER -> {
	return owner;
	}
	case IS_DIRECTORY -> {
	return isDirectory;
	}
	case FILENAME -> {
	return filename;
	}
	}
	throw new IllegalArgumentException("invalid filter criteria type");

As -> is alread used in the switch block, it can be enhanced:

 return switch (attributeName) { 
     case SIZE -> size; 
     case OWNER -> owner; 
     case IS_DIRECTORY -> isDirectory; 
     case FILENAME -> filename; 
 }

This is better as you can skip the unnecessary throw at the end, as the switch branch is exhaustive.