122 lines
2.9 KiB
Go
122 lines
2.9 KiB
Go
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package impl
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import (
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"fmt"
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"reflect"
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pref "google.golang.org/protobuf/reflect/protoreflect"
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)
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type mapConverter struct {
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goType reflect.Type // map[K]V
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keyConv, valConv Converter
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}
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func newMapConverter(t reflect.Type, fd pref.FieldDescriptor) *mapConverter {
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if t.Kind() != reflect.Map {
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panic(fmt.Sprintf("invalid Go type %v for field %v", t, fd.FullName()))
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}
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return &mapConverter{
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goType: t,
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keyConv: newSingularConverter(t.Key(), fd.MapKey()),
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valConv: newSingularConverter(t.Elem(), fd.MapValue()),
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}
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}
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func (c *mapConverter) PBValueOf(v reflect.Value) pref.Value {
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if v.Type() != c.goType {
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panic(fmt.Sprintf("invalid type: got %v, want %v", v.Type(), c.goType))
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}
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return pref.ValueOfMap(&mapReflect{v, c.keyConv, c.valConv})
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}
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func (c *mapConverter) GoValueOf(v pref.Value) reflect.Value {
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return v.Map().(*mapReflect).v
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}
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func (c *mapConverter) IsValidPB(v pref.Value) bool {
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mapv, ok := v.Interface().(*mapReflect)
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if !ok {
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return false
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}
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return mapv.v.Type() == c.goType
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}
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func (c *mapConverter) IsValidGo(v reflect.Value) bool {
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return v.IsValid() && v.Type() == c.goType
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}
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func (c *mapConverter) New() pref.Value {
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return c.PBValueOf(reflect.MakeMap(c.goType))
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}
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func (c *mapConverter) Zero() pref.Value {
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return c.PBValueOf(reflect.Zero(c.goType))
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}
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type mapReflect struct {
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v reflect.Value // map[K]V
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keyConv Converter
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valConv Converter
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}
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func (ms *mapReflect) Len() int {
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return ms.v.Len()
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}
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func (ms *mapReflect) Has(k pref.MapKey) bool {
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rk := ms.keyConv.GoValueOf(k.Value())
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rv := ms.v.MapIndex(rk)
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return rv.IsValid()
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}
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func (ms *mapReflect) Get(k pref.MapKey) pref.Value {
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rk := ms.keyConv.GoValueOf(k.Value())
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rv := ms.v.MapIndex(rk)
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if !rv.IsValid() {
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return pref.Value{}
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}
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return ms.valConv.PBValueOf(rv)
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}
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func (ms *mapReflect) Set(k pref.MapKey, v pref.Value) {
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rk := ms.keyConv.GoValueOf(k.Value())
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rv := ms.valConv.GoValueOf(v)
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ms.v.SetMapIndex(rk, rv)
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}
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func (ms *mapReflect) Clear(k pref.MapKey) {
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rk := ms.keyConv.GoValueOf(k.Value())
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ms.v.SetMapIndex(rk, reflect.Value{})
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}
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func (ms *mapReflect) Mutable(k pref.MapKey) pref.Value {
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if _, ok := ms.valConv.(*messageConverter); !ok {
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panic("invalid Mutable on map with non-message value type")
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}
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v := ms.Get(k)
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if !v.IsValid() {
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v = ms.NewValue()
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ms.Set(k, v)
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}
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return v
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}
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func (ms *mapReflect) Range(f func(pref.MapKey, pref.Value) bool) {
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iter := mapRange(ms.v)
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for iter.Next() {
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k := ms.keyConv.PBValueOf(iter.Key()).MapKey()
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v := ms.valConv.PBValueOf(iter.Value())
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if !f(k, v) {
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return
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}
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}
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}
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func (ms *mapReflect) NewValue() pref.Value {
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return ms.valConv.New()
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}
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func (ms *mapReflect) IsValid() bool {
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return !ms.v.IsNil()
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}
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func (ms *mapReflect) protoUnwrap() interface{} {
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return ms.v.Interface()
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}
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