Created
June 8, 2018 03:19
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Timestamp in ObjectId of MongoDB
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| public abstract class EdpMongoUtil { | |
| /** | |
| * @param objectId ObjectId of MongoDB | |
| * @return time of java.time.Instant | |
| */ | |
| public static Instant timeFromObjectId(String objectId) { | |
| return Instant.ofEpochMilli(Integer.parseInt(objectId.substring(0, 8), 16) * 1000); | |
| } | |
| /** | |
| * @param time time of java.time.Instant | |
| * @return ObjectId of MongoDB | |
| */ | |
| public static String objectIdFromTime(Instant time) { | |
| return Integer.toString((int) (time.toEpochMilli() / 1000L), 16) + "0000000000000000"; | |
| } | |
| } |
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