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grammer.go
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grammer.go
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/*
Copyright IBM Corporation 2021.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package parser
import (
"encoding/json"
"io/ioutil"
)
// AnnotationGrammer ...
type AnnotationGrammer struct {
Definitions []struct {
Label string `json:"label"`
MandatoryFields []struct {
Name string `json:"name"`
Type string `json:"type"`
} `json:"mandatoryFields"`
AtleastoneFields []struct {
Name string `json:"name"`
Type string `json:"type"`
} `json:"atleastoneFields"`
OptionalFields []struct {
Name string `json:"name"`
Type string `json:"type"`
} `json:"optionalFields"`
StrictOrdering string `json:"strictOrdering,omitempty"`
KeyLessEntry string `json:"keyLessEntry,omitempty"`
} `json:"definition"`
}
//Grammer Model
// AnnotationDefintion ...
type AnnotationDefintion struct {
mandatoryfieldDefinitions map[string]ParseMethodDef
atleastOneMandatoryFieldDefinitions map[string]ParseMethodDef
optionalFieldDefinitions map[string]ParseMethodDef
keyLessAllowed bool
strictOrdering bool
label string
}
// Load user Defined annotations defintions from json file
func getAnnotationDefintions(filename string) AnnotationGrammer {
raw, err := ioutil.ReadFile(filename)
if err != nil {
panic(err)
}
var annotationGrammer AnnotationGrammer
json.Unmarshal(raw, &annotationGrammer)
return annotationGrammer
}
// Prepare ...
func Prepare(filenames ...string) {
if len(filenames) < 1 {
err := prepareAnnotationDefintions(getAnnotationDefintions("annotations.json"))
if err != nil {
panic(err)
}
} else {
for _, filename := range filenames {
err := prepareAnnotationDefintions(getAnnotationDefintions(filename))
if err != nil {
panic(err)
}
}
}
}