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utils.go
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utils.go
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package main
import (
"fmt"
"path/filepath"
"strings"
"unicode"
"google.golang.org/protobuf/types/descriptorpb"
)
const (
javaOuterClassSuffix = "OuterClass"
)
func getProtoName(file *descriptorpb.FileDescriptorProto) string {
name := file.GetName()
ext := filepath.Ext(name)
if ext == ".proto" || ext == ".protodevel" {
name = name[0 : len(name)-len(ext)]
}
return name
}
func getJavaOuterClassName(file *descriptorpb.FileDescriptorProto) string {
name := file.Options.GetJavaOuterClassname()
if name != "" {
return name
}
name = camelCase(getProtoName(file))
outer := name + javaOuterClassSuffix
for _, desc := range file.MessageType {
if strings.Title(desc.GetName()) == name {
return outer
}
}
for _, desc := range file.Service {
if strings.Title(desc.GetName()) == name {
return outer
}
}
for _, desc := range file.GetEnumType() {
if strings.Title(desc.GetName()) == name {
return outer
}
}
return name
}
func getJavaOuterClassFile(file *descriptorpb.FileDescriptorProto) string {
className := getJavaOuterClassName(file)
pkg := getJavaPackage(file)
if pkg == "" {
return fmt.Sprintf("%s.java", className)
} else {
dir := strings.Replace(pkg, ".", "/", -1)
return fmt.Sprintf("%s/%s.java", dir, className)
}
}
func containsType(name string, file *descriptorpb.FileDescriptorProto) bool {
for _, t := range file.GetEnumType() {
if t.GetName() == name {
return true
}
}
for _, t := range file.GetMessageType() {
if t.GetName() == name {
return true
}
}
for _, t := range file.GetService() {
if t.GetName() == name {
return true
}
}
return false
}
func getJavaServiceClassName(file *descriptorpb.FileDescriptorProto, service *descriptorpb.ServiceDescriptorProto) string {
serviceName := camelCase(service.GetName())
return fmt.Sprintf("%s", serviceName)
}
func getJavaServiceClassFile(file *descriptorpb.FileDescriptorProto, service *descriptorpb.ServiceDescriptorProto) string {
serviceClass := getJavaServiceClassName(file, service)
pkg := getJavaPackage(file)
if pkg == "" {
return fmt.Sprintf("%s.java", serviceClass)
} else {
dir := strings.Replace(pkg, ".", "/", -1)
return fmt.Sprintf("%s/%s.java", dir, serviceClass)
}
}
func getJavaServiceClientClassName(file *descriptorpb.FileDescriptorProto, service *descriptorpb.ServiceDescriptorProto) string {
serviceName := camelCase(service.GetName())
name := fmt.Sprintf("%sClient", serviceName)
if containsType(name, file) {
name = fmt.Sprintf("%sTwirpClient", serviceName)
}
return name
}
func getJavaServiceClientClassFile(file *descriptorpb.FileDescriptorProto, service *descriptorpb.ServiceDescriptorProto) string {
serviceClass := getJavaServiceClientClassName(file, service)
return getJavaServiceClientClassFileByString(file, serviceClass)
}
func getJavaServiceClientClassFileByString(file *descriptorpb.FileDescriptorProto, serviceClass string) string {
pkg := getJavaPackage(file)
if pkg == "" {
return fmt.Sprintf("%s.java", serviceClass)
} else {
dir := strings.Replace(pkg, ".", "/", -1)
return fmt.Sprintf("%s/%s.java", dir, serviceClass)
}
}
func getJavaPackage(file *descriptorpb.FileDescriptorProto) string {
pkg := file.Options.GetJavaPackage()
if pkg != "" {
return pkg
}
return file.GetPackage()
}
func camelCase(str string) string {
parts := strings.Split(str, "_")
for i, part := range parts {
runes := []rune(part)
runes[0] = unicode.ToUpper(runes[0])
parts[i] = string(runes)
}
return strings.Join(parts, "")
}
func lowerCamelCase(str string) string {
cc := camelCase(str)
runes := []rune(cc)
runes[0] = unicode.ToLower(runes[0])
return string(runes)
}