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x_json_marshal.go
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/
x_json_marshal.go
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package birch
import (
"time"
"github.com/tychoish/birch/bsontype"
"github.com/tychoish/birch/jsonx"
)
// MarshalJSON produces a JSON representation of the Document,
// preserving the order of the keys, and type information for types
// that have no JSON equivlent using MongoDB's extended JSON format
// where needed.
func (d *Document) MarshalJSON() ([]byte, error) { return d.toJSON().MarshalJSON() }
func (d *Document) toJSON() *jsonx.Document {
iter := d.Iterator()
out := jsonx.DC.Make(d.Len())
for iter.Next(iterCtx) {
elem := iter.Value()
out.Append(jsonx.EC.Value(elem.Key(), elem.Value().toJSON()))
}
if err := iter.Close(); err != nil {
panic(err)
}
return out
}
// MarshalJSON produces a JSON representation of an Array preserving
// the type information for the types that have no JSON equivalent
// using MongoDB's extended JSON format where needed.
func (a *Array) MarshalJSON() ([]byte, error) { return a.toJSON().MarshalJSON() }
func (a *Array) toJSON() *jsonx.Array {
iter := a.Iterator()
out := jsonx.AC.Make(a.Len())
for iter.Next(iterCtx) {
out.Append(iter.Value().toJSON())
}
if err := iter.Close(); err != nil {
panic(err)
}
return out
}
func (v *Value) MarshalJSON() ([]byte, error) { return v.toJSON().MarshalJSON() }
func (v *Value) toJSON() *jsonx.Value {
switch v.Type() {
case bsontype.Double:
return jsonx.VC.Float64(v.Double())
case bsontype.String:
return jsonx.VC.String(v.StringValue())
case bsontype.EmbeddedDocument:
return jsonx.VC.Object(v.MutableDocument().toJSON())
case bsontype.Array:
return jsonx.VC.Array(v.MutableArray().toJSON())
case bsontype.Binary:
t, d := v.Binary()
return jsonx.VC.ObjectFromElements(
jsonx.EC.ObjectFromElements("$binary",
jsonx.EC.String("base64", string(t)),
jsonx.EC.String("subType", string(d)),
),
)
case bsontype.Undefined:
return jsonx.VC.ObjectFromElements(jsonx.EC.Boolean("$undefined", true))
case bsontype.ObjectID:
return jsonx.VC.ObjectFromElements(jsonx.EC.String("$oid", v.ObjectID().Hex()))
case bsontype.Boolean:
return jsonx.VC.Boolean(v.Boolean())
case bsontype.DateTime:
return jsonx.VC.ObjectFromElements(jsonx.EC.String("$date", v.Time().Format(time.RFC3339)))
case bsontype.Null:
return jsonx.VC.Nil()
case bsontype.Regex:
pattern, opts := v.Regex()
return jsonx.VC.ObjectFromElements(
jsonx.EC.ObjectFromElements("$regularExpression",
jsonx.EC.String("pattern", pattern),
jsonx.EC.String("options", opts),
),
)
case bsontype.DBPointer:
ns, oid := v.DBPointer()
return jsonx.VC.ObjectFromElements(
jsonx.EC.ObjectFromElements("$dbPointer",
jsonx.EC.String("$ref", ns),
jsonx.EC.String("$id", oid.Hex()),
),
)
case bsontype.JavaScript:
return jsonx.VC.ObjectFromElements(jsonx.EC.String("$code", v.JavaScript()))
case bsontype.Symbol:
return jsonx.VC.ObjectFromElements(jsonx.EC.String("$symbol", v.Symbol()))
case bsontype.CodeWithScope:
code, scope := v.MutableJavaScriptWithScope()
return jsonx.VC.ObjectFromElements(
jsonx.EC.String("$code", code),
jsonx.EC.Object("$scope", scope.toJSON()),
)
case bsontype.Int32:
return jsonx.VC.Int32(v.Int32())
case bsontype.Timestamp:
t, i := v.Timestamp()
return jsonx.VC.ObjectFromElements(
jsonx.EC.ObjectFromElements("$timestamp",
jsonx.EC.Int64("t", int64(t)),
jsonx.EC.Int64("i", int64(i)),
),
)
case bsontype.Int64:
return jsonx.VC.Int64(v.Int64())
case bsontype.Decimal128:
return jsonx.VC.ObjectFromElements(jsonx.EC.String("$numberDecimal", v.Decimal128().String()))
case bsontype.MinKey:
return jsonx.VC.ObjectFromElements(jsonx.EC.Int("$minKey", 1))
case bsontype.MaxKey:
return jsonx.VC.ObjectFromElements(jsonx.EC.Int("$maxKey", 1))
default:
return nil
}
}