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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,233 @@ | ||
| package filter | ||
|
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||
| import ( | ||
| "reflect" | ||
| ) | ||
|
|
||
| var fieldCacheVar fieldCache | ||
|
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| func init() { | ||
| fieldCacheVar.maps = make(map[string]*field) | ||
| } | ||
|
|
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| type fieldCache struct { | ||
| maps map[string]*field | ||
| } | ||
| type field struct { | ||
| index int //该字段所处结构体的索引位置 | ||
| tag tag | ||
| selectFields []*field | ||
| } | ||
|
|
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| func newField(t tag, idx int) field { | ||
| return field{ | ||
| tag: t, | ||
| index: idx, | ||
| } | ||
| } | ||
|
|
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| func getCacheKey(pkgInfo string, scene string, isSelect bool) string { | ||
| mode := ".s" | ||
| if !isSelect { | ||
| mode = ".o" | ||
| } | ||
| return pkgInfo + "." + scene + mode | ||
| } | ||
| func (t *fieldNodeTree) parseAny2(key, scene string, valueOf reflect.Value, isSelect bool) { | ||
| typeOf := valueOf.Type() | ||
| TakePointerValue: //取指针的值 | ||
| switch typeOf.Kind() { | ||
| case reflect.Ptr: //如果是指针类型则取值重新判断类型 | ||
| valueOf = valueOf.Elem() | ||
| typeOf = typeOf.Elem() | ||
| goto TakePointerValue | ||
| case reflect.Interface: | ||
| if !valueOf.IsNil() { | ||
| valueOf = reflect.ValueOf(valueOf.Interface()) | ||
| typeOf = valueOf.Type() | ||
| goto TakePointerValue | ||
| } else { | ||
| parserNilInterface(t, key) | ||
| } | ||
| case reflect.Struct: | ||
| parserStructCache(typeOf, valueOf, t, scene, key, isSelect) | ||
| case reflect.Bool, | ||
| reflect.String, | ||
| reflect.Float64, reflect.Float32, | ||
| reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int, | ||
| reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint: | ||
| parserBaseType(valueOf, t, key) | ||
| case reflect.Map: | ||
| parserMap(valueOf, t, scene, isSelect) | ||
| case reflect.Slice, reflect.Array: | ||
| parserSliceOrArray(typeOf, valueOf, t, scene, key, isSelect) | ||
| } | ||
|
|
||
| } | ||
|
|
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| func parserStructCache(typeOf reflect.Type, valueOf reflect.Value, t *fieldNodeTree, scene string, key string, isSelect bool) { | ||
| if valueOf.CanConvert(timeTypes) { //是time.Time类型或者底层是time.Time类型 | ||
| t.Key = key | ||
| t.Val = valueOf.Interface() | ||
| return | ||
| } | ||
| if typeOf.NumField() == 0 { //如果是一个struct{}{}类型的字段或者是一个空的自定义结构体编码为{} | ||
| t.Key = key | ||
| t.Val = struct{}{} | ||
| return | ||
| } | ||
| pkgInfo := typeOf.PkgPath() + "." + typeOf.Name() | ||
|
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| cacheKey := getCacheKey(pkgInfo, scene, isSelect) | ||
| cacheField, ok := fieldCacheVar.maps[cacheKey] | ||
| if !ok { | ||
|
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| var parentField *field | ||
| if t.isRoot { | ||
| //fieldCacheVar.maps[cacheKey] = &field{} | ||
| parentField = new(field) | ||
| fieldCacheVar.maps[cacheKey] = parentField | ||
| } else { | ||
| parentField = t.fieldCache | ||
| } | ||
|
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| for i := 0; i < typeOf.NumField(); i++ { | ||
| var tagInfo tagInfo | ||
| tagInfo = getSelectTag(scene, pkgInfo, i, typeOf) | ||
| if !isSelect { | ||
| tagInfo = getOmitTag(scene, pkgInfo, i, typeOf) | ||
| } | ||
|
|
||
| if tagInfo.omit { | ||
| continue | ||
| } | ||
| tag := tagInfo.tag | ||
| if tag.IsOmitField || !tag.IsSelect { | ||
| continue | ||
| } | ||
| isAnonymous := typeOf.Field(i).Anonymous && tag.IsAnonymous ////什么时候才算真正的匿名字段？ Book中Article才算匿名结构体 | ||
| tag.IsAnonymous = isAnonymous | ||
| fieldCache := newField(tag, i) | ||
| fieldEl, ok1 := fieldCacheVar.maps[cacheKey] | ||
| if ok1 { | ||
| fieldEl.selectFields = append(fieldEl.selectFields, &fieldCache) | ||
| //fieldCacheVar.maps[cacheKey].selectFields = append(fieldCacheVar.maps[cacheKey].selectFields, &fieldCache) | ||
| } | ||
|
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| tree := &fieldNodeTree{ | ||
| Key: tag.UseFieldName, | ||
| ParentNode: t, | ||
| IsAnonymous: isAnonymous, | ||
| Tag: tag, | ||
| fieldCache: &fieldCache, | ||
| } | ||
| value := valueOf.Field(i) | ||
| if tag.Function != "" { | ||
| function := valueOf.MethodByName(tag.Function) | ||
| if !function.IsValid() { | ||
| if valueOf.CanAddr() { | ||
| function = valueOf.Addr().MethodByName(tag.Function) | ||
| } | ||
| } | ||
| if function.IsValid() { | ||
| values := function.Call([]reflect.Value{}) | ||
| if len(values) != 0 { | ||
| value = values[0] | ||
| } | ||
| } | ||
| } | ||
| if value.Kind() == reflect.Ptr { | ||
| TakeFieldValue: | ||
| if value.Kind() == reflect.Ptr { | ||
| if value.IsNil() { | ||
| if tag.Omitempty { | ||
| continue | ||
| } | ||
| tree.IsNil = true | ||
| t.AddChild(tree) | ||
| continue | ||
| } else { | ||
| value = value.Elem() | ||
| goto TakeFieldValue | ||
| } | ||
| } | ||
| } else { | ||
| if tag.Omitempty { | ||
| if value.IsZero() { //为零值忽略 | ||
| continue | ||
| } | ||
| } | ||
| } | ||
|
|
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| tree.parseAny2(tag.UseFieldName, scene, value, isSelect) | ||
|
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| if t.IsAnonymous { | ||
| t.AnonymousAddChild(tree) | ||
| } else { | ||
| t.AddChild(tree) | ||
| } | ||
| } | ||
| } else { //说明缓存取到 | ||
| for i := 0; i < len(cacheField.selectFields); i++ { | ||
| fieldInfo := cacheField.selectFields[i] | ||
| tag := fieldInfo.tag | ||
| tree := &fieldNodeTree{ | ||
| Key: tag.UseFieldName, | ||
| ParentNode: t, | ||
| IsAnonymous: tag.IsAnonymous, | ||
| Tag: tag, | ||
| fieldCache: fieldInfo, | ||
| } | ||
| value := valueOf.Field(fieldInfo.index) | ||
| if tag.Function != "" { | ||
| function := valueOf.MethodByName(tag.Function) | ||
| if !function.IsValid() { | ||
| if valueOf.CanAddr() { | ||
| function = valueOf.Addr().MethodByName(tag.Function) | ||
| } | ||
| } | ||
| if function.IsValid() { | ||
| values := function.Call([]reflect.Value{}) | ||
| if len(values) != 0 { | ||
| value = values[0] | ||
| } | ||
| } | ||
| } | ||
| if value.Kind() == reflect.Ptr { | ||
| TakeFieldValue1: | ||
| if value.Kind() == reflect.Ptr { | ||
| if value.IsNil() { | ||
| if tag.Omitempty { | ||
| continue | ||
| } | ||
| tree.IsNil = true | ||
| t.AddChild(tree) | ||
| continue | ||
| } else { | ||
| value = value.Elem() | ||
| goto TakeFieldValue1 | ||
| } | ||
| } | ||
| } else { | ||
| if tag.Omitempty { | ||
| if value.IsZero() { //为零值忽略 | ||
| continue | ||
| } | ||
| } | ||
| } | ||
|
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| tree.parseAny2(tag.UseFieldName, scene, value, isSelect) | ||
|
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| if t.IsAnonymous { | ||
| t.AnonymousAddChild(tree) | ||
| } else { | ||
| t.AddChild(tree) | ||
| } | ||
| } | ||
| } | ||
|
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| if t.Children == nil && !t.IsAnonymous { | ||
| t.Val = struct{}{} //这样表示返回{} | ||
| } | ||
|
|
||
| } |
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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