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dynamic.go
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dynamic.go
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package values
import (
"fmt"
"regexp"
"github.com/influxdata/flux/semantic"
)
type Dynamic interface {
Value
Inner() Value
}
type dynamic struct {
inner Value
}
func (d dynamic) Inner() Value {
return d.inner
}
func (d dynamic) Type() semantic.MonoType {
return semantic.NewDynamicType()
}
func (d dynamic) IsNull() bool {
return d.inner.IsNull()
}
func (d dynamic) Str() string {
panic(UnexpectedKind(semantic.Dynamic, semantic.String))
}
func (d dynamic) Bytes() []byte {
panic(UnexpectedKind(semantic.Dynamic, semantic.Bytes))
}
func (d dynamic) Int() int64 {
panic(UnexpectedKind(semantic.Dynamic, semantic.Int))
}
func (d dynamic) UInt() uint64 {
panic(UnexpectedKind(semantic.Dynamic, semantic.UInt))
}
func (d dynamic) Float() float64 {
panic(UnexpectedKind(semantic.Dynamic, semantic.Float))
}
func (d dynamic) Bool() bool {
panic(UnexpectedKind(semantic.Dynamic, semantic.Bool))
}
func (d dynamic) Time() Time {
panic(UnexpectedKind(semantic.Dynamic, semantic.Time))
}
func (d dynamic) Duration() Duration {
panic(UnexpectedKind(semantic.Dynamic, semantic.Duration))
}
func (d dynamic) Regexp() *regexp.Regexp {
panic(UnexpectedKind(semantic.Dynamic, semantic.Regexp))
}
func (d dynamic) Array() Array {
panic(UnexpectedKind(semantic.Dynamic, semantic.Array))
}
func (d dynamic) Object() Object {
panic(UnexpectedKind(semantic.Dynamic, semantic.Object))
}
func (d dynamic) Function() Function {
panic(UnexpectedKind(semantic.Dynamic, semantic.Function))
}
func (d dynamic) Dict() Dictionary {
panic(UnexpectedKind(semantic.Dynamic, semantic.Dictionary))
}
func (d dynamic) Dynamic() Dynamic {
return d
}
func (d dynamic) Vector() Vector {
panic(UnexpectedKind(semantic.Dynamic, semantic.Vector))
}
func (d dynamic) Equal(v Value) bool {
dv, ok := v.(Dynamic)
if !ok {
return false
}
return d.inner.Equal(dv.Inner())
}
func (d dynamic) Retain() {
d.inner.Retain()
}
func (d dynamic) Release() {
d.inner.Release()
}
// NewDynamic will recursively wrap a Value in Dynamic.
// Note that any Value can be wrapped, but only a subset have user-facing
// means of extraction.
// If you want to produce a user-facing error for certain types, do so in the
// caller.
func NewDynamic(v Value) Dynamic {
// Both typed and untyled nulls should wrap plainly
if v.IsNull() && v.Type().Nature() != semantic.Dynamic {
return dynamic{inner: v}
}
switch n := v.Type().Nature(); n {
// N.b check to see if the incoming value is Dynamic before all else.
// We want to avoid re-wrapping, and in the case of nulls a check like
// `Dynamic.IsNull` will report `true` when the inner value is null.
case semantic.Dynamic:
return v.Dynamic()
case
// Basic types wrap plainly.
semantic.String,
semantic.Bytes,
semantic.Int,
semantic.UInt,
semantic.Float,
semantic.Bool,
semantic.Time,
semantic.Duration,
// Currently this set of types are not well-supported.
// For now, wrap them like basic types.
// Callers may not be able to access the inner types in these cases.
semantic.Regexp,
semantic.Dictionary,
semantic.Vector,
semantic.Stream,
semantic.Function:
return dynamic{inner: v}
// Composite types need to recurse.
case semantic.Array:
arr := v.Array()
elems := make([]Value, arr.Len())
arr.Range(func(i int, v Value) {
val := NewDynamic(v)
elems[i] = val
})
return dynamic{
inner: NewArrayWithBacking(
semantic.NewArrayType(semantic.NewDynamicType()),
elems,
),
}
case semantic.Object:
obj := v.Object()
o := make(map[string]Value, obj.Len())
obj.Range(func(k string, v Value) {
val := NewDynamic(v)
o[k] = val
})
return dynamic{inner: NewObjectWithValues(o)}
default:
panic(fmt.Errorf("unexpected nature %v", n))
}
}