ObjectId class
A globally unique identifier for objects.
Consists of 12 bytes, divided as follows:
- time (4 bytes)
- machine (3 bytes)
- pid (2 bytes)
- inc (3 bytes)
- Implemented types
Constructors
- ObjectId()
-
Creates a new object id.
factory
-
ObjectId.fromBytes(List<
int?> ? bytes) -
Creates a new instance from the given byte list.
factory
- ObjectId.fromDate(DateTime date)
-
Creates a new instance from the given date, with the rest of the ObjectId
zeroed out. Used for comparisons or sorting the ObjectId.
factory
- ObjectId.fromHexString(String? hexString)
-
Creates a new instance from a 24-byte hexadecimal string representation.
factory
Properties
- counter → int
-
The counter
no setter
- date → DateTime
-
The timestamp as a DateTime instance.
no setter
- hashCode → int
-
The hash code for this object.
no setteroverride
- machineId → int
-
The machine identifier.
no setter
- processId → int
-
The process identifier.
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- timestamp → int
-
The timestamp. (number of seconds since the Unix epoch).
no setter
Methods
-
compareTo(
ObjectId other) → int -
Compares this object to another object.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toBytes(
) → List< int?> - Converts to a byte list. Note that the numbers are stored in big-endian order.
-
toHexString(
) → String - Converts this instance into 24-byte hexadecimal string representation.
-
toString(
) → String -
A string representation of this object.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
override
Static Methods
-
isValid(
String? hexString) → bool -
Checks if a string could be an ObjectId. Throws an ArgumentError if
hexStringis null.