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package encoding
import (
"reflect"
"time"
)
var (
// type constants
stringType = reflect.TypeOf("")
timeType = reflect.TypeOf(new(time.Time)).Elem()
marshalerType = reflect.TypeOf(new(Marshaler)).Elem()
unmarshalerType = reflect.TypeOf(new(Unmarshaler)).Elem()
emptyInterfaceType = reflect.TypeOf((*interface{})(nil)).Elem()
mapInterfaceType = reflect.TypeOf((map[string]interface{})(nil))
)
// Marshaler is the interface implemented by objects that
// can marshal themselves into a valid RQL pseudo-type.
type Marshaler interface {
MarshalRQL() (interface{}, error)
}
// Unmarshaler is the interface implemented by objects
// that can unmarshal a pseudo-type object of themselves.
type Unmarshaler interface {
UnmarshalRQL(interface{}) error
}
func init() {
encoderCache.m = make(map[reflect.Type]encoderFunc)
decoderCache.m = make(map[decoderCacheKey]decoderFunc)
}
// IgnoreType causes the encoder to ignore a type when encoding
func IgnoreType(t reflect.Type) {
encoderCache.Lock()
encoderCache.m[t] = doNothingEncoder
encoderCache.Unlock()
}
func SetTypeEncoding(
t reflect.Type,
encode func(value interface{}) (interface{}, error),
decode func(encoded interface{}, value reflect.Value) error,
) {
encoderCache.Lock()
encoderCache.m[t] = func(v reflect.Value) (interface{}, error) {
return encode(v.Interface())
}
encoderCache.Unlock()
dec := func(dv reflect.Value, sv reflect.Value) error {
return decode(sv.Interface(), dv)
}
decoderCache.Lock()
// decode as pointer
decoderCache.m[decoderCacheKey{dt: t, st: emptyInterfaceType}] = dec
// decode as value
decoderCache.m[decoderCacheKey{dt: t, st: mapInterfaceType}] = dec
if t.Kind() == reflect.Ptr {
decoderCache.m[decoderCacheKey{dt: t.Elem(), st: emptyInterfaceType}] = dec
decoderCache.m[decoderCacheKey{dt: t.Elem(), st: mapInterfaceType}] = dec
}
decoderCache.Unlock()
}
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