ProtoTypeMap.java 文件源码

private static String getJavaOuterClassname(
        DescriptorProtos.FileDescriptorProto fileDescriptor,
        DescriptorProtos.FileOptions fileOptions) {

    if (fileOptions.hasJavaOuterClassname()) {
        return fileOptions.getJavaOuterClassname();
    }

    // If the outer class name is not explicitly defined, then we take the proto filename, strip its extension,
    // and convert it from snake case to camel case.
    String filename = fileDescriptor.getName().substring(0, fileDescriptor.getName().length() - ".proto".length());
    filename = CaseFormat.LOWER_UNDERSCORE.to(CaseFormat.UPPER_CAMEL, filename);
    return appendOuterClassSuffix(filename, fileDescriptor);
}