primitive

Documentation

Overview

Package primitive contains types similar to Go primitives for BSON types that do not have direct Go primitive representations.

Index

• Constants
• Variables
• func CompareTimestamp(tp, tp2 Timestamp) int
• func IsValidObjectID(s string) bool
• type A
• type Binary
  • func (bp Binary) Equal(bp2 Binary) bool
  • func (bp Binary) IsZero() bool
• type CodeWithScope
  • func (cws CodeWithScope) String() string
• type D
  • func (d D) Map() M
• type DBPointer
  • func (d DBPointer) Equal(d2 DBPointer) bool
  • func (d DBPointer) IsZero() bool
  • func (d DBPointer) String() string
• type DateTime
  • func NewDateTimeFromTime(t time.Time) DateTime
  • func (d DateTime) MarshalJSON() ([]byte, error)
  • func (d DateTime) Time() time.Time
  • func (d *DateTime) UnmarshalJSON(data []byte) error
• type Decimal128
  • func NewDecimal128(h, l uint64) Decimal128
  • func ParseDecimal128(s string) (Decimal128, error)
  • func ParseDecimal128FromBigInt(bi *big.Int, exp int) (Decimal128, bool)
  • func (d Decimal128) BigInt() (bi *big.Int, exp int, err error)
  • func (d Decimal128) GetBytes() (uint64, uint64)
  • func (d Decimal128) IsInf() int
  • func (d Decimal128) IsNaN() bool
  • func (d Decimal128) IsZero() bool
  • func (d Decimal128) MarshalJSON() ([]byte, error)
  • func (d Decimal128) String() string
  • func (d *Decimal128) UnmarshalJSON(b []byte) error
• type E
• type JavaScript
• type M
• type MaxKey
• type MinKey
• type Null
• type ObjectID
  • func NewObjectID() ObjectID
  • func NewObjectIDFromTimestamp(timestamp time.Time) ObjectID
  • func ObjectIDFromHex(s string) (ObjectID, error)
  • func (id ObjectID) Hex() string
  • func (id ObjectID) IsZero() bool
  • func (id ObjectID) MarshalJSON() ([]byte, error)
  • func (id ObjectID) String() string
  • func (id ObjectID) Timestamp() time.Time
  • func (id *ObjectID) UnmarshalJSON(b []byte) error
• type Regex
  • func (rp Regex) Equal(rp2 Regex) bool
  • func (rp Regex) IsZero() bool
  • func (rp Regex) String() string
• type Symbol
• type Timestamp
  • func (tp Timestamp) Equal(tp2 Timestamp) bool
  • func (tp Timestamp) IsZero() bool
• type Undefined

Constants

const (
	MaxDecimal128Exp = 6111
	MinDecimal128Exp = -6176
)

These constants are the maximum and minimum values for the exponent field in a decimal128 value.

Variables

var (
	ErrParseNaN    = errors.New("cannot parse NaN as a *big.Int")
	ErrParseInf    = errors.New("cannot parse Infinity as a *big.Int")
	ErrParseNegInf = errors.New("cannot parse -Infinity as a *big.Int")
)

These errors are returned when an invalid value is parsed as a big.Int.

var ErrInvalidHex = errors.New("the provided hex string is not a valid ObjectID")

ErrInvalidHex indicates that a hex string cannot be converted to an ObjectID.

Functions

func CompareTimestamp

func CompareTimestamp(tp, tp2 Timestamp) int

CompareTimestamp returns an integer comparing two Timestamps, where T is compared first, followed by I. Returns 0 if tp = tp2, 1 if tp > tp2, -1 if tp < tp2.

func IsValidObjectID

func IsValidObjectID(s string) bool

IsValidObjectID returns true if the provided hex string represents a valid ObjectID and false if not.

Types

type A

type A []interface{}

An A is an ordered representation of a BSON array.

Example usage:

bson.A{"bar", "world", 3.14159, bson.D{{"qux", 12345}}}

type Binary

type Binary struct {
	Subtype byte
	Data    []byte
}

Binary represents a BSON binary value.

func (Binary) Equal

func (bp Binary) Equal(bp2 Binary) bool

Equal compares bp to bp2 and returns true if they are equal.

func (Binary) IsZero

func (bp Binary) IsZero() bool

IsZero returns if bp is the empty Binary.

type CodeWithScope

type CodeWithScope struct {
	Code  JavaScript
	Scope interface{}
}

CodeWithScope represents a BSON JavaScript code with scope value.

func (CodeWithScope) String

func (cws CodeWithScope) String() string

type D

type D []E

D is an ordered representation of a BSON document. This type should be used when the order of the elements matters, such as MongoDB command documents. If the order of the elements does not matter, an M should be used instead.

Example usage:

bson.D{{"foo", "bar"}, {"hello", "world"}, {"pi", 3.14159}}

func (D) Map

func (d D) Map() M

Map creates a map from the elements of the D.

type DBPointer

type DBPointer struct {
	DB      string
	Pointer ObjectID
}

DBPointer represents a BSON dbpointer value.

func (DBPointer) Equal

func (d DBPointer) Equal(d2 DBPointer) bool

Equal compares d to d2 and returns true if they are equal.

func (DBPointer) IsZero

func (d DBPointer) IsZero() bool

IsZero returns if d is the empty DBPointer.

func (DBPointer) String

func (d DBPointer) String() string

type DateTime

type DateTime int64

DateTime represents the BSON datetime value.

func NewDateTimeFromTime

func NewDateTimeFromTime(t time.Time) DateTime

NewDateTimeFromTime creates a new DateTime from a Time.

func (DateTime) MarshalJSON

func (d DateTime) MarshalJSON() ([]byte, error)

MarshalJSON marshal to time type.

func (DateTime) Time

func (d DateTime) Time() time.Time

Time returns the date as a time type.

func (*DateTime) UnmarshalJSON

func (d *DateTime) UnmarshalJSON(data []byte) error

UnmarshalJSON creates a primitive.DateTime from a JSON string.

type Decimal128

type Decimal128 struct {
	// contains filtered or unexported fields
}

Decimal128 holds decimal128 BSON values.

func NewDecimal128

func NewDecimal128(h, l uint64) Decimal128

NewDecimal128 creates a Decimal128 using the provide high and low uint64s.

func ParseDecimal128

func ParseDecimal128(s string) (Decimal128, error)

ParseDecimal128 takes the given string and attempts to parse it into a valid Decimal128 value.

func ParseDecimal128FromBigInt

func ParseDecimal128FromBigInt(bi *big.Int, exp int) (Decimal128, bool)

ParseDecimal128FromBigInt attempts to parse the given significand and exponent into a valid Decimal128 value.

func (Decimal128) BigInt

func (d Decimal128) BigInt() (bi *big.Int, exp int, err error)

BigInt returns significand as big.Int and exponent, bi * 10 ^ exp.

func (Decimal128) GetBytes

func (d Decimal128) GetBytes() (uint64, uint64)

GetBytes returns the underlying bytes of the BSON decimal value as two uint64 values. The first contains the most first 8 bytes of the value and the second contains the latter.

func (Decimal128) IsInf

func (d Decimal128) IsInf() int

IsInf returns:

+1 d == Infinity
 0 other case
-1 d == -Infinity

func (Decimal128) IsNaN

func (d Decimal128) IsNaN() bool

IsNaN returns whether d is NaN.

func (Decimal128) IsZero

func (d Decimal128) IsZero() bool

IsZero returns true if d is the empty Decimal128.

func (Decimal128) MarshalJSON

func (d Decimal128) MarshalJSON() ([]byte, error)

MarshalJSON returns Decimal128 as a string.

func (Decimal128) String

func (d Decimal128) String() string

String returns a string representation of the decimal value.

func (*Decimal128) UnmarshalJSON

func (d *Decimal128) UnmarshalJSON(b []byte) error

UnmarshalJSON creates a primitive.Decimal128 from a JSON string, an extended JSON $numberDecimal value, or the string "null". If b is a JSON string or extended JSON value, d will have the value of that string, and if b is "null", d will be unchanged.

type E

type E struct {
	Key   string
	Value interface{}
}

E represents a BSON element for a D. It is usually used inside a D.

type JavaScript

type JavaScript string

JavaScript represents a BSON JavaScript code value.

type M

type M map[string]interface{}

M is an unordered representation of a BSON document. This type should be used when the order of the elements does not matter. This type is handled as a regular map[string]interface{} when encoding and decoding. Elements will be serialized in an undefined, random order. If the order of the elements matters, a D should be used instead.

Example usage:

bson.M{"foo": "bar", "hello": "world", "pi": 3.14159}

type MaxKey

type MaxKey struct{}

MaxKey represents the BSON maxkey value.

type MinKey

type MinKey struct{}

MinKey represents the BSON minkey value.

type Null

type Null struct{}

Null represents the BSON null value.

type ObjectID

type ObjectID [12]byte

ObjectID is the BSON ObjectID type.

var NilObjectID ObjectID

NilObjectID is the zero value for ObjectID.

func NewObjectID

func NewObjectID() ObjectID

NewObjectID generates a new ObjectID.

func NewObjectIDFromTimestamp

func NewObjectIDFromTimestamp(timestamp time.Time) ObjectID

NewObjectIDFromTimestamp generates a new ObjectID based on the given time.

func ObjectIDFromHex

func ObjectIDFromHex(s string) (ObjectID, error)

ObjectIDFromHex creates a new ObjectID from a hex string. It returns an error if the hex string is not a valid ObjectID.

func (ObjectID) Hex

func (id ObjectID) Hex() string

Hex returns the hex encoding of the ObjectID as a string.

func (ObjectID) IsZero

func (id ObjectID) IsZero() bool

IsZero returns true if id is the empty ObjectID.

func (ObjectID) MarshalJSON

func (id ObjectID) MarshalJSON() ([]byte, error)

MarshalJSON returns the ObjectID as a string

func (ObjectID) String

func (id ObjectID) String() string

func (ObjectID) Timestamp

func (id ObjectID) Timestamp() time.Time

Timestamp extracts the time part of the ObjectId.

func (*ObjectID) UnmarshalJSON

func (id *ObjectID) UnmarshalJSON(b []byte) error

UnmarshalJSON populates the byte slice with the ObjectID. If the byte slice is 24 bytes long, it will be populated with the hex representation of the ObjectID. If the byte slice is twelve bytes long, it will be populated with the BSON representation of the ObjectID. This method also accepts empty strings and decodes them as NilObjectID. For any other inputs, an error will be returned.

type Regex

type Regex struct {
	Pattern string
	Options string
}

Regex represents a BSON regex value.

func (Regex) Equal

func (rp Regex) Equal(rp2 Regex) bool

Equal compares rp to rp2 and returns true if they are equal.

func (Regex) IsZero

func (rp Regex) IsZero() bool

IsZero returns if rp is the empty Regex.

func (Regex) String

func (rp Regex) String() string

type Symbol

type Symbol string

Symbol represents a BSON symbol value.

type Timestamp

type Timestamp struct {
	T uint32
	I uint32
}

Timestamp represents a BSON timestamp value.

func (Timestamp) Equal

func (tp Timestamp) Equal(tp2 Timestamp) bool

Equal compares tp to tp2 and returns true if they are equal.

func (Timestamp) IsZero

func (tp Timestamp) IsZero() bool

IsZero returns if tp is the zero Timestamp.

type Undefined

type Undefined struct{}

Undefined represents the BSON undefined value type.