private void initHandler()

in auth/src/main/java/com/firebase/ui/auth/ui/email/EmailLinkCatcherActivity.java [48:83]
35 lines of code
11 McCabe index (conditional complexity)

    private void initHandler() {
        mHandler = new ViewModelProvider(this).get(EmailLinkSignInHandler.class);
        mHandler.init(getFlowParams());
        mHandler.getOperation().observe(this, new ResourceObserver<IdpResponse>(this) {
            @Override
            protected void onSuccess(@NonNull IdpResponse response) {
                finish(RESULT_OK, response.toIntent());
            }

            @Override
            protected void onFailure(@NonNull final Exception e) {
                if (e instanceof UserCancellationException) {
                    finish(RESULT_CANCELED, null);
                } else if (e instanceof FirebaseAuthAnonymousUpgradeException) {
                    IdpResponse res = ((FirebaseAuthAnonymousUpgradeException) e).getResponse();
                    finish(RESULT_CANCELED, new Intent().putExtra(ExtraConstants.IDP_RESPONSE, res));
                } else if (e instanceof FirebaseUiException) {
                    int errorCode = ((FirebaseUiException) e).getErrorCode();
                    if (errorCode == ErrorCodes.EMAIL_LINK_WRONG_DEVICE_ERROR
                            || errorCode == ErrorCodes.INVALID_EMAIL_LINK_ERROR
                            || errorCode == ErrorCodes.EMAIL_LINK_DIFFERENT_ANONYMOUS_USER_ERROR) {
                        buildAlertDialog(errorCode).show();
                    } else if (errorCode == ErrorCodes.EMAIL_LINK_PROMPT_FOR_EMAIL_ERROR
                            || errorCode == ErrorCodes.EMAIL_MISMATCH_ERROR) {
                        startErrorRecoveryFlow(RequestCodes.EMAIL_LINK_PROMPT_FOR_EMAIL_FLOW);
                    } else if (errorCode == ErrorCodes.EMAIL_LINK_CROSS_DEVICE_LINKING_ERROR) {
                        startErrorRecoveryFlow(RequestCodes.EMAIL_LINK_CROSS_DEVICE_LINKING_FLOW);
                    }
                } else if (e instanceof FirebaseAuthInvalidCredentialsException) {
                    startErrorRecoveryFlow(RequestCodes.EMAIL_LINK_PROMPT_FOR_EMAIL_FLOW);
                } else {
                    finish(RESULT_CANCELED, IdpResponse.getErrorIntent(e));
                }
            }
        });
    }