299 lines
7.7 KiB
Go
299 lines
7.7 KiB
Go
// Package event ...
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//
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// Description : event ...
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 2023-02-01 14:30
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package event
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import (
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"git.zhangdeman.cn/zhangdeman/event/abstract"
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"git.zhangdeman.cn/zhangdeman/util"
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"reflect"
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"strings"
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"sync"
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)
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var (
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// ReflectTypeInstance 反射实例
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ReflectTypeInstance *ReflectType
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)
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func init() {
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ReflectTypeInstance = &ReflectType{
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lock: &sync.RWMutex{},
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cacheTable: make(map[string]*StructInfo),
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}
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}
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// ReflectType 反射数据类型
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 14:31 2023/2/1
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type ReflectType struct {
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// 数据锁
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lock *sync.RWMutex
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// 反射结果缓存
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cacheTable map[string]*StructInfo
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}
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// Do 反射获取数据类型
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 14:34 2023/2/1
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//
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// 为特定结构体生成全局唯一的标识, 并进行缓存, 加速反射结果获取
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func (rt *ReflectType) Do(dataFlag string, data interface{}) *StructInfo {
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rt.lock.Lock()
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defer rt.lock.Unlock()
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if cacheResult, exist := rt.cacheTable[dataFlag]; exist {
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// 缓存存在, 直接是有缓存结果
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return cacheResult
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}
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// 缓存不存在, 解析
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res := &StructInfo{
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Flag: dataFlag,
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IsStruct: false,
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IsStructPtr: false,
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StructFieldList: make([]*StructField, 0),
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}
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isPtr := false
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reflectType := reflect.TypeOf(data)
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if reflectType.Kind() == reflect.Ptr {
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isPtr = true
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reflectType = reflectType.Elem()
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}
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if reflectType.Kind() != reflect.Struct {
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// 非结构体，无需反射
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rt.cacheTable[dataFlag] = res
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return res
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}
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res.IsStruct = true
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res.IsStructPtr = isPtr
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for idx := 0; idx < reflectType.NumField(); idx++ {
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field := &StructField{
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Idx: idx,
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Name: reflectType.Field(idx).Name,
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JsonTag: reflectType.Field(idx).Tag.Get(JsonTag),
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EventTag: reflectType.Field(idx).Tag.Get(OutEventTag),
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MappingRuleList: make([]MappingRuleItem, 0),
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}
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rt.fillFieldType(field, reflectType.Field(idx).Type)
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rt.fillMappingRule(field, reflectType.Field(idx).Tag.Get(MappingTag))
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res.StructFieldList = append(res.StructFieldList, field)
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}
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rt.cacheTable[dataFlag] = res
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return res
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}
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// fillFieldType 填充字段类型
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 20:46 2023/2/1
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func (rt *ReflectType) fillFieldType(field *StructField, dataType reflect.Type) {
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switch dataType.Kind() {
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case reflect.Float32:
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fallthrough
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case reflect.Float64:
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field.Type = reflect.Float64
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case reflect.String:
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field.Type = reflect.String
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case reflect.Struct:
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field.Type = reflect.Struct
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case reflect.Ptr:
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field.IsPtr = true
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// 指针再次判断基础类型
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field.Type = dataType.Elem().Kind()
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default:
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if strings.Contains(dataType.String(), "int") {
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field.Type = reflect.Int64
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} else {
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field.Type = reflect.Interface
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}
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}
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}
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// fillTagInfo 填充标签信息
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 17:11 2023/2/1
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func (rt *ReflectType) fillTagInfo(field *StructField) {
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if len(field.JsonTag) == 0 {
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field.JsonTag = field.Name
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}
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// jsonTag 去掉 omitempty
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jsonTagValArr := strings.Split(field.JsonTag, ",")
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for _, item := range jsonTagValArr {
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if len(item) > 0 && item != OmitemptyTag {
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field.JsonTag = item
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break
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}
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}
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// 没有设置event tag,则和 json tag保持一致
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if len(field.EventTag) == 0 {
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field.EventTag = field.JsonTag
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}
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}
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// fillMappingRule 解析参数映射规则
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 17:14 2023/2/1
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//
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// mapping:"user_id:param#user_id|header#id"
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func (rt *ReflectType) fillMappingRule(field *StructField, inputMappingVal string) {
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if len(inputMappingVal) == 0 {
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// 没有指定规则, 有默认规则
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for _, location := range mappingLocationList {
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field.MappingRuleList = append(field.MappingRuleList, MappingRuleItem{
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Location: location,
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Field: field.JsonTag,
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})
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}
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return
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}
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mappingArr := strings.Split(inputMappingVal, ",")
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for _, item := range mappingArr {
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item = strings.TrimSpace(item)
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// 要赋值的字段名
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itemArr := strings.Split(item, ":")
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if len(itemArr) != 2 {
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// 配置格式错误, 跳过
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continue
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}
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mapRuleArr := strings.Split(strings.TrimSpace(itemArr[1]), "|")
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for _, itemMapRule := range mapRuleArr {
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itemMapRule = strings.TrimLeft(itemMapRule, "#")
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itemMapRuleArr := strings.Split(itemMapRule, "#")
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// 注意 : # 为特殊分隔符, 如配置成 mapping:"project_id:#source_project_id#xxx_project_id" 实际等价于 mapping:"project_id:#source_project_id" 多余配置自动跳过
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if len(itemMapRuleArr[0]) < 2 {
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// 没有指定位置，默认all, 即配置格式: mapping:"project_id:#source_project_id"
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itemMapRuleArr[0] = MappingLocationAll
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itemMapRuleArr = []string{MappingLocationAll, itemMapRuleArr[0]}
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}
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switch itemMapRuleArr[0] {
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// 从header读取
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case MappingLocationHeader:
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field.MappingRuleList = append(field.MappingRuleList, MappingRuleItem{
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Location: MappingLocationHeader,
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Field: itemMapRuleArr[1],
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})
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// 从请求参数读取
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case MappingLocationParam:
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field.MappingRuleList = append(field.MappingRuleList, MappingRuleItem{
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Location: MappingLocationParam,
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Field: itemMapRuleArr[1],
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})
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// 从响应数据读取
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case MappingLocationResponse:
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field.MappingRuleList = append(field.MappingRuleList, MappingRuleItem{
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Location: MappingLocationResponse,
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Field: itemMapRuleArr[1],
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})
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// 从扩展数据读取
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case MappingLocationExtension:
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field.MappingRuleList = append(field.MappingRuleList, MappingRuleItem{
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Location: MappingLocationExtension,
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Field: itemMapRuleArr[1],
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})
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// 全部读取一遍
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case MappingLocationAll:
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fallthrough
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default:
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for _, itemLocation := range mappingLocationList {
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field.MappingRuleList = append(field.MappingRuleList, MappingRuleItem{
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Location: itemLocation,
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Field: itemMapRuleArr[1],
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})
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}
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}
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}
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}
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}
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// ReflectValue 反射值的实例
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 10:53 2023/2/2
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type ReflectValue struct {
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}
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// Do 通过反射机制，对data进行数据填充，此逻辑要求 data 必须是结构体或者结构体指针
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 11:52 2023/2/2
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func (rv *ReflectValue) Do(dataFlag string, data interface{}, preSendHandler abstract.IPreSendHandler) {
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structInfo := ReflectTypeInstance.Do(dataFlag, data)
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if !structInfo.IsStruct {
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return
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}
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reflectValue := reflect.ValueOf(data)
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if structInfo.IsStructPtr {
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reflectValue = reflectValue.Elem()
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}
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for _, fieldInfo := range structInfo.StructFieldList {
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if !rv.isZeroInputFieldValue(reflectValue, fieldInfo) {
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// 不是零值, 无需处理
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continue
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}
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// 是零值, 填充默认值
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}
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}
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// isZeroInputFieldValue 判断对应的字段是否为对应类型默认的零值
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//
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// Author : go_developer@163.com<白茶清欢>
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//
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// Date : 12:04 2023/2/2
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func (rv *ReflectValue) isZeroInputFieldValue(reflectValue reflect.Value, fieldInfo *StructField) bool {
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inputVal := reflectValue.Field(fieldInfo.Idx).Interface()
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switch fieldInfo.Type {
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case reflect.Float64:
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var f float64
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if err := util.ConvertAssign(&f, inputVal); nil == err {
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if f != 0 {
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return false
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}
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return true
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}
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case reflect.String:
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var s string
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if err := util.ConvertAssign(&s, inputVal); nil == err {
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if len(s) > 0 {
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return false
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}
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return true
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}
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case reflect.Int64:
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var i int64
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if err := util.ConvertAssign(&i, inputVal); nil == err {
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if i != 0 {
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return false
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}
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return true
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}
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case reflect.Interface:
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if inputVal == nil {
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return true
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}
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return false
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default:
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// 默认不处理
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return false
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}
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return false
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}
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