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models.go
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models.go
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// Copyright (c) 2018 Cisco and/or its affiliates.
//
// 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 models
import (
"fmt"
"path"
"github.com/gogo/protobuf/proto"
)
// Key is a shorthand for the GetKey for avoid error checking.
func Key(x proto.Message) string {
key, err := GetKey(x)
if err != nil {
panic(err)
}
return key
}
// Name is a shorthand for the GetName for avoid error checking.
func Name(x proto.Message) string {
name, err := GetName(x)
if err != nil {
panic(err)
}
return name
}
// Path is a shorthand for the GetPath for avoid error checking.
func Path(x proto.Message) string {
path, err := GetPath(x)
if err != nil {
panic(err)
}
return path
}
// Model returns registered model for the given proto message.
func Model(x proto.Message) registeredModel {
model, err := GetModel(x)
if err != nil {
panic(err)
}
return model
}
// GetKey returns complete key for gived model,
// including key prefix defined by model specification.
// It returns error if given model is not registered.
func GetKey(x proto.Message) (string, error) {
model, err := GetModel(x)
if err != nil {
return "", err
}
name, err := model.name(x)
if err != nil {
return "", err
}
key := path.Join(model.keyPrefix, name)
return key, nil
}
// GetName
func GetName(x proto.Message) (string, error) {
model, err := GetModel(x)
if err != nil {
return "", err
}
name, err := model.name(x)
if err != nil {
return "", err
}
return name, nil
}
// GetKeyPrefix returns key prefix for gived model.
// It returns error if given model is not registered.
func GetPath(x proto.Message) (string, error) {
model, err := GetModel(x)
if err != nil {
return "", err
}
return model.Path(), nil
}
// GetModel returns registered model for the given proto message.
func GetModel(x proto.Message) (registeredModel, error) {
protoName := proto.MessageName(x)
model, found := registeredModels[protoName]
if !found {
return registeredModel{}, fmt.Errorf("no model registered for %s", protoName)
}
return *model, nil
}