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utils.go
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/
utils.go
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// Copyright 2020 Antrea Authors
//
// 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 transform
import (
"encoding/json"
"io"
"reflect"
)
type unary func(interface{}, map[string]string) (interface{}, error)
type FuncType func(reader io.Reader, single bool) (interface{}, error)
func GenericFactory(objType, listType reflect.Type, objTransform, listTransform unary, opts map[string]string) FuncType {
return func(reader io.Reader, single bool) (interface{}, error) {
var refType reflect.Type
if single {
refType = objType
} else {
refType = listType
}
refVal := reflect.New(refType)
if err := json.NewDecoder(reader).Decode(refVal.Interface()); err != nil {
return nil, err
}
if single && objTransform != nil {
return objTransform(refVal.Interface(), opts)
} else if !single && listTransform != nil {
return listTransform(refVal.Interface(), opts)
}
return refVal.Interface(), nil
}
}