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// Copyright (C) 2014 The Android Open Source Project
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package schema
import ""
// Object is an instance of a Class.
type Object struct {
Type *Class
Fields []interface{}
// Class implements binary.Object using the schema system to do the encoding and
// decoding of fields.
func (o *Object) Class() binary.Class {
return o.Type
// Base returns the value of the single, anonymous field of o. If o does not
// have a single anonymous field, then Base returns nil.
func (o *Object) Base() interface{} {
if len(o.Fields) != 1 {
return nil // Multiple fields
if ty := o.Type.Fields[0]; ty.Declared == "" {
return o.Fields[0]
return nil // Not anonymous
// Underlying traverses the single, anonymous fields nested in v, returning the
// deepest-nested value that is not an object or does not have a single,
// anonymous field.
// If v is not an Object or does not have a single, anonymous field then v is
// returned.
func Underlying(v interface{}) interface{} {
if o, ok := v.(*Object); ok {
if b := o.Base(); b != nil {
return Underlying(b)
return v