AST Transformations

How to write less code

Hi, I'm Maciej

BOILERPLATE

LAZY, But...

MenuItemActivity.intent(this)
        .place(currentPlace)
        .item(selectedItem)
        .start();

HOW?

ANNOTATION PROCESSING API

BYTECODE WEAVING

AST TRANSFORMATIONS

LOMBOK + HRISEY

MAGIC?

 public final class LoginActivity extends Activity {

    @MagicViews
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login_activity);
        usernameField.setText(prefs.getUsername());
    }

    private void onSignInButtonClick() {
        String username = usernameField.getText().toString();
        String password = passwordField.getText().toString();
        // make API call
    }
}

TALK IS CHEAP,

SHOW ME THE CODE

GROOVY

and more coding...

Q || A

THANKS!

Now code only what is worth coding!

LINKS

• twitter: @mg6maciej
• github: mg6maciej
• simple-github-client
• Bytecode weaving
• Groovy on Android