81 lines
1.6 KiB
Go
81 lines
1.6 KiB
Go
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package annotation
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import (
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"fmt"
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"reflect"
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"strings"
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"git.loafle.net/commons_go/di"
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)
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const (
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AnnotationStartChar = "("
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AnnotationEndChar = ")"
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AnnotationAttributeSpliter = ","
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AnnotationKeyValueSpliter = "="
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)
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type Annotation interface {
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}
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// @Inject(name? string)
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// @Resource(name? string)
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func ParseAnnotation(tag reflect.StructTag) (map[string]Annotation, error) {
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a := strings.Trim(tag.Get(di.AnnotationTag), " ")
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if "" == a {
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return nil, nil
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}
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rKVs := make(map[string]Annotation)
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inject, err := ParseInject(a)
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if nil != err {
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return nil, err
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}
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rKVs[InjectTag] = inject
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resource, err := ParseResource(a)
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if nil != err {
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return nil, err
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}
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rKVs[ResourceTag] = resource
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return rKVs, nil
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}
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func ParseAttribute(a string, startIndex int) (map[string]string, error) {
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if startIndex >= len(a) {
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return nil, nil
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}
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if AnnotationStartChar != string([]rune(a)[startIndex]) {
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return nil, nil
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}
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endIndex := strings.Index(a[startIndex+1:], AnnotationEndChar)
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if -1 == endIndex {
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return nil, fmt.Errorf("DI: Syntax error - annotation(%s) has '%s', but '%s' is not exist", a, AnnotationStartChar, AnnotationEndChar)
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}
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endIndex = endIndex + startIndex + 1
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body := a[startIndex+1 : endIndex]
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kvs := strings.Split(body, AnnotationAttributeSpliter)
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if 0 == len(kvs) {
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return nil, nil
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}
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rKVs := make(map[string]string)
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for i := 0; i < len(kvs); i++ {
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s := strings.Trim(kvs[i], " ")
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if "" == s {
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continue
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}
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kv := strings.Split(s, AnnotationKeyValueSpliter)
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k := strings.Trim(kv[0], " ")
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v := strings.Trim(kv[1], " ")
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rKVs[k] = v
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}
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return rKVs, nil
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}
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