get camel name out of protocol buffer field

I have a protocol buffer message like this:

    message Person {

    optional string last_name = 1; 
    optional string first_name = 2;

    }

The java generated class looks like this:

 public static final class Person extends
      com.google.protobuf.GeneratedMessage {
    // Use Person.newBuilder() to construct.
    ...... constructor stuffs

    // optional string first_name = 1;
    public static final int FIRST_NAME_FIELD_NUMBER = 1;
    private boolean hasFirstName;
    private java.lang.String firstName_ = "";
    public boole开发者_运维知识库an hasFirstName() { return hasFirstName; }
    public java.lang.String getFirstName() { return firstName_; }

    // optional string last_name = 2;
    public static final int LAST_NAME_FIELD_NUMBER = 2;
    private boolean hasLastName;
    private java.lang.String lastName_ = "";
    public boolean hasLastName() { return hasLastName; }
    public java.lang.String getLastName() { return lastName_; }
  ............
}

When java object is generated it uses camel field name as lastName, firstName through method call getLastName() and getFirstName(). Is there a way to get the camel field name out? I don't want to get the original field name name : last_name, first_name and convert it again to camel field name every time that I want to do getter and setter on my java object.

Copying in an answer (hence wiki, as not my answer) from Kenton Varda on the protobuf list:

No, the camel-case name is not stored anywhere. You will need to construct it yourself. If performance is a concern, just cache the results in a Map.