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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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"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 protoreflect.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) protoreflect.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 protoreflect.ValueOfMap(&mapReflect{v, c.keyConv, c.valConv}) |
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} |
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func (c *mapConverter) GoValueOf(v protoreflect.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 protoreflect.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() protoreflect.Value { |
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return c.PBValueOf(reflect.MakeMap(c.goType)) |
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} |
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func (c *mapConverter) Zero() protoreflect.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 protoreflect.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 protoreflect.MapKey) protoreflect.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 protoreflect.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 protoreflect.MapKey, v protoreflect.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 protoreflect.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 protoreflect.MapKey) protoreflect.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(protoreflect.MapKey, protoreflect.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() protoreflect.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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} |