khenaidoo | 106c61a | 2021-08-11 18:05:46 -0400 | [diff] [blame] | 1 | // Copyright 2018 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package impl |
| 6 | |
| 7 | import ( |
| 8 | "fmt" |
| 9 | "reflect" |
| 10 | |
| 11 | pref "google.golang.org/protobuf/reflect/protoreflect" |
| 12 | ) |
| 13 | |
| 14 | type mapConverter struct { |
| 15 | goType reflect.Type // map[K]V |
| 16 | keyConv, valConv Converter |
| 17 | } |
| 18 | |
| 19 | func newMapConverter(t reflect.Type, fd pref.FieldDescriptor) *mapConverter { |
| 20 | if t.Kind() != reflect.Map { |
| 21 | panic(fmt.Sprintf("invalid Go type %v for field %v", t, fd.FullName())) |
| 22 | } |
| 23 | return &mapConverter{ |
| 24 | goType: t, |
| 25 | keyConv: newSingularConverter(t.Key(), fd.MapKey()), |
| 26 | valConv: newSingularConverter(t.Elem(), fd.MapValue()), |
| 27 | } |
| 28 | } |
| 29 | |
| 30 | func (c *mapConverter) PBValueOf(v reflect.Value) pref.Value { |
| 31 | if v.Type() != c.goType { |
| 32 | panic(fmt.Sprintf("invalid type: got %v, want %v", v.Type(), c.goType)) |
| 33 | } |
| 34 | return pref.ValueOfMap(&mapReflect{v, c.keyConv, c.valConv}) |
| 35 | } |
| 36 | |
| 37 | func (c *mapConverter) GoValueOf(v pref.Value) reflect.Value { |
| 38 | return v.Map().(*mapReflect).v |
| 39 | } |
| 40 | |
| 41 | func (c *mapConverter) IsValidPB(v pref.Value) bool { |
| 42 | mapv, ok := v.Interface().(*mapReflect) |
| 43 | if !ok { |
| 44 | return false |
| 45 | } |
| 46 | return mapv.v.Type() == c.goType |
| 47 | } |
| 48 | |
| 49 | func (c *mapConverter) IsValidGo(v reflect.Value) bool { |
| 50 | return v.IsValid() && v.Type() == c.goType |
| 51 | } |
| 52 | |
| 53 | func (c *mapConverter) New() pref.Value { |
| 54 | return c.PBValueOf(reflect.MakeMap(c.goType)) |
| 55 | } |
| 56 | |
| 57 | func (c *mapConverter) Zero() pref.Value { |
| 58 | return c.PBValueOf(reflect.Zero(c.goType)) |
| 59 | } |
| 60 | |
| 61 | type mapReflect struct { |
| 62 | v reflect.Value // map[K]V |
| 63 | keyConv Converter |
| 64 | valConv Converter |
| 65 | } |
| 66 | |
| 67 | func (ms *mapReflect) Len() int { |
| 68 | return ms.v.Len() |
| 69 | } |
| 70 | func (ms *mapReflect) Has(k pref.MapKey) bool { |
| 71 | rk := ms.keyConv.GoValueOf(k.Value()) |
| 72 | rv := ms.v.MapIndex(rk) |
| 73 | return rv.IsValid() |
| 74 | } |
| 75 | func (ms *mapReflect) Get(k pref.MapKey) pref.Value { |
| 76 | rk := ms.keyConv.GoValueOf(k.Value()) |
| 77 | rv := ms.v.MapIndex(rk) |
| 78 | if !rv.IsValid() { |
| 79 | return pref.Value{} |
| 80 | } |
| 81 | return ms.valConv.PBValueOf(rv) |
| 82 | } |
| 83 | func (ms *mapReflect) Set(k pref.MapKey, v pref.Value) { |
| 84 | rk := ms.keyConv.GoValueOf(k.Value()) |
| 85 | rv := ms.valConv.GoValueOf(v) |
| 86 | ms.v.SetMapIndex(rk, rv) |
| 87 | } |
| 88 | func (ms *mapReflect) Clear(k pref.MapKey) { |
| 89 | rk := ms.keyConv.GoValueOf(k.Value()) |
| 90 | ms.v.SetMapIndex(rk, reflect.Value{}) |
| 91 | } |
| 92 | func (ms *mapReflect) Mutable(k pref.MapKey) pref.Value { |
| 93 | if _, ok := ms.valConv.(*messageConverter); !ok { |
| 94 | panic("invalid Mutable on map with non-message value type") |
| 95 | } |
| 96 | v := ms.Get(k) |
| 97 | if !v.IsValid() { |
| 98 | v = ms.NewValue() |
| 99 | ms.Set(k, v) |
| 100 | } |
| 101 | return v |
| 102 | } |
| 103 | func (ms *mapReflect) Range(f func(pref.MapKey, pref.Value) bool) { |
| 104 | iter := mapRange(ms.v) |
| 105 | for iter.Next() { |
| 106 | k := ms.keyConv.PBValueOf(iter.Key()).MapKey() |
| 107 | v := ms.valConv.PBValueOf(iter.Value()) |
| 108 | if !f(k, v) { |
| 109 | return |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | func (ms *mapReflect) NewValue() pref.Value { |
| 114 | return ms.valConv.New() |
| 115 | } |
| 116 | func (ms *mapReflect) IsValid() bool { |
| 117 | return !ms.v.IsNil() |
| 118 | } |
| 119 | func (ms *mapReflect) protoUnwrap() interface{} { |
| 120 | return ms.v.Interface() |
| 121 | } |