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232 lines
6.4 KiB
Go
232 lines
6.4 KiB
Go
// Copyright (C) MongoDB, Inc. 2017-present.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may
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// not use this file except in compliance with the License. You may obtain
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// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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// Package primitive contains types similar to Go primitives for BSON types that do not have direct
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// Go primitive representations.
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package primitive // import "go.mongodb.org/mongo-driver/bson/primitive"
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"time"
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)
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// Binary represents a BSON binary value.
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type Binary struct {
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Subtype byte
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Data []byte
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}
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// Equal compares bp to bp2 and returns true if they are equal.
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func (bp Binary) Equal(bp2 Binary) bool {
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if bp.Subtype != bp2.Subtype {
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return false
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}
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return bytes.Equal(bp.Data, bp2.Data)
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}
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// IsZero returns if bp is the empty Binary.
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func (bp Binary) IsZero() bool {
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return bp.Subtype == 0 && len(bp.Data) == 0
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}
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// Undefined represents the BSON undefined value type.
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type Undefined struct{}
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// DateTime represents the BSON datetime value.
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type DateTime int64
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var _ json.Marshaler = DateTime(0)
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var _ json.Unmarshaler = (*DateTime)(nil)
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// MarshalJSON marshal to time type.
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func (d DateTime) MarshalJSON() ([]byte, error) {
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return json.Marshal(d.Time().UTC())
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}
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// UnmarshalJSON creates a primitive.DateTime from a JSON string.
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func (d *DateTime) UnmarshalJSON(data []byte) error {
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// Ignore "null" to keep parity with the time.Time type and the standard library. Decoding "null" into a non-pointer
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// DateTime field will leave the field unchanged. For pointer values, the encoding/json will set the pointer to nil
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// and will not defer to the UnmarshalJSON hook.
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if string(data) == "null" {
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return nil
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}
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var tempTime time.Time
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if err := json.Unmarshal(data, &tempTime); err != nil {
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return err
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}
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*d = NewDateTimeFromTime(tempTime)
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return nil
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}
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// Time returns the date as a time type.
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func (d DateTime) Time() time.Time {
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return time.Unix(int64(d)/1000, int64(d)%1000*1000000)
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}
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// NewDateTimeFromTime creates a new DateTime from a Time.
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func NewDateTimeFromTime(t time.Time) DateTime {
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return DateTime(t.Unix()*1e3 + int64(t.Nanosecond())/1e6)
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}
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// Null represents the BSON null value.
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type Null struct{}
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// Regex represents a BSON regex value.
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type Regex struct {
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Pattern string
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Options string
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}
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func (rp Regex) String() string {
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return fmt.Sprintf(`{"pattern": "%s", "options": "%s"}`, rp.Pattern, rp.Options)
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}
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// Equal compares rp to rp2 and returns true if they are equal.
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func (rp Regex) Equal(rp2 Regex) bool {
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return rp.Pattern == rp2.Pattern && rp.Options == rp2.Options
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}
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// IsZero returns if rp is the empty Regex.
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func (rp Regex) IsZero() bool {
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return rp.Pattern == "" && rp.Options == ""
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}
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// DBPointer represents a BSON dbpointer value.
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type DBPointer struct {
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DB string
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Pointer ObjectID
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}
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func (d DBPointer) String() string {
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return fmt.Sprintf(`{"db": "%s", "pointer": "%s"}`, d.DB, d.Pointer)
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}
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// Equal compares d to d2 and returns true if they are equal.
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func (d DBPointer) Equal(d2 DBPointer) bool {
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return d == d2
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}
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// IsZero returns if d is the empty DBPointer.
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func (d DBPointer) IsZero() bool {
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return d.DB == "" && d.Pointer.IsZero()
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}
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// JavaScript represents a BSON JavaScript code value.
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type JavaScript string
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// Symbol represents a BSON symbol value.
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type Symbol string
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// CodeWithScope represents a BSON JavaScript code with scope value.
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type CodeWithScope struct {
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Code JavaScript
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Scope interface{}
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}
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func (cws CodeWithScope) String() string {
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return fmt.Sprintf(`{"code": "%s", "scope": %v}`, cws.Code, cws.Scope)
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}
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// Timestamp represents a BSON timestamp value.
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type Timestamp struct {
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T uint32
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I uint32
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}
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// After reports whether the time instant tp is after tp2.
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func (tp Timestamp) After(tp2 Timestamp) bool {
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return tp.T > tp2.T || (tp.T == tp2.T && tp.I > tp2.I)
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}
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// Before reports whether the time instant tp is before tp2.
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func (tp Timestamp) Before(tp2 Timestamp) bool {
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return tp.T < tp2.T || (tp.T == tp2.T && tp.I < tp2.I)
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}
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// Equal compares tp to tp2 and returns true if they are equal.
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func (tp Timestamp) Equal(tp2 Timestamp) bool {
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return tp.T == tp2.T && tp.I == tp2.I
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}
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// IsZero returns if tp is the zero Timestamp.
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func (tp Timestamp) IsZero() bool {
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return tp.T == 0 && tp.I == 0
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}
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// Compare compares the time instant tp with tp2. If tp is before tp2, it returns -1; if tp is after
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// tp2, it returns +1; if they're the same, it returns 0.
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func (tp Timestamp) Compare(tp2 Timestamp) int {
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switch {
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case tp.Equal(tp2):
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return 0
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case tp.Before(tp2):
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return -1
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default:
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return +1
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}
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}
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// CompareTimestamp compares the time instant tp with tp2. If tp is before tp2, it returns -1; if tp is after
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// tp2, it returns +1; if they're the same, it returns 0.
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//
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// Deprecated: Use Timestamp.Compare instead.
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func CompareTimestamp(tp, tp2 Timestamp) int {
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return tp.Compare(tp2)
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}
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// MinKey represents the BSON minkey value.
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type MinKey struct{}
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// MaxKey represents the BSON maxkey value.
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type MaxKey struct{}
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// D is an ordered representation of a BSON document. This type should be used when the order of the elements matters,
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// such as MongoDB command documents. If the order of the elements does not matter, an M should be used instead.
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//
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// Example usage:
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//
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// bson.D{{"foo", "bar"}, {"hello", "world"}, {"pi", 3.14159}}
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type D []E
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// Map creates a map from the elements of the D.
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//
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// Deprecated: Converting directly from a D to an M will not be supported in Go Driver 2.0. Instead,
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// users should marshal the D to BSON using bson.Marshal and unmarshal it to M using bson.Unmarshal.
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func (d D) Map() M {
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m := make(M, len(d))
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for _, e := range d {
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m[e.Key] = e.Value
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}
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return m
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}
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// E represents a BSON element for a D. It is usually used inside a D.
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type E struct {
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Key string
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Value interface{}
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}
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// M is an unordered representation of a BSON document. This type should be used when the order of the elements does not
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// matter. This type is handled as a regular map[string]interface{} when encoding and decoding. Elements will be
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// serialized in an undefined, random order. If the order of the elements matters, a D should be used instead.
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//
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// Example usage:
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//
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// bson.M{"foo": "bar", "hello": "world", "pi": 3.14159}
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type M map[string]interface{}
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// An A is an ordered representation of a BSON array.
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//
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// Example usage:
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//
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// bson.A{"bar", "world", 3.14159, bson.D{{"qux", 12345}}}
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type A []interface{}
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