Use static strings or enumerations where possible

[thinkingserious]

Issue Summary

For the content types, please use static strings or enumerations so that it will look like:
Content content = new Content(Content.TYPE_HTML, "I'm replacing the body tag");

The same thing here:
request.endpoint = "mail/send";

[marcosbarbero]

Hi @thinkingserious, I just made a fork of the master branch and something looks weird.
All the classes got the package com.sendgrid but none of them are under this package, they are under com.sendgrid.helpers.mail.*. Is it something that should be fixed as well?

[thinkingserious]

Yes please, thanks!

[marcosbarbero]

Could you please provide some more info about the last part on the issue?

request.endpoint = "mail/send";

Where is it placed? I didn't found any reference.

[marcosbarbero]

As I can see the Request object is placed in another sendgrid project named java-http-client so this last piece must be in that project instead of here. Am I right?

[thinkingserious]

@marcosbarbero,

You are correct.

[marcosbarbero]

@thinkingserious I made a PR #148 and it's failing, I appreciate if you can help me.

[thinkingserious]

@marcosbarbero,

I'll take a look, thanks!