private static void readAll(File file, AttributeProvider provider, Map<String, Object> map) {
for (String attribute : provider.attributes(file)) {
Object value = provider.get(file, attribute);
// check for null to protect against race condition when an attribute present when
// attributes(file) was called is deleted before get() is called for that attribute
if (value != null) {
map.put(attribute, value);
}
}
}
