/**
* Enrolls a finger and returns the associated fp-data.
*
* @param env the Java Environment pointer.
* @param obj the jobject of the type jlibfprint/JlibFprint.
* @return the jlibfprint/JlibFprint$fp_print_data with the data just given by the scanner.
* @throws an enroll_exception is raised is something gone wrong.
*/
JNIEXPORT jobject JNICALL Java_jlibfprint_JlibFprint_enroll_1finger(JNIEnv* env, jobject ref)
{
const jclass fpClass = env->FindClass("jlibfprint/JlibFprint$fp_print_data");
const jclass eeClass = env->FindClass("jlibfprint/JlibFprint$EnrollException");
/* Starts the library */
if (fp_init()) // Se differente da 0 => Exception
{
jobject enrollException = env->AllocObject(eeClass);
jfieldID eeExcp_id = env->GetFieldID(eeClass, "enroll_exception", "I");
env->SetIntField(enrollException, eeExcp_id, UNABLE_TO_LOAD_LIBFPRINT);
env->Throw((jthrowable)enrollException);
return NULL;
}
fp_dev *device;
fp_print_data* pdp;
/* Gets the pointer to the device */
if (!get_device_id(env, ref, &device))
{
jobject enrollException = env->AllocObject(eeClass);
jfieldID eeExcp_id = env->GetFieldID(eeClass, "enroll_exception", "I");
env->SetIntField(enrollException, eeExcp_id, DEVICE_NOT_FOUND);
env->Throw((jthrowable)enrollException);
return NULL;
}
/* Enrolls the finger */
int ef = fp_enroll_finger(device, &pdp);
/* Create a new obj to store the data */
jobject obj = env->AllocObject(fpClass);
/* Raises an exception if the enrollment was not completed */
if (ef != FP_ENROLL_COMPLETE)
{
jobject enrollException = env->AllocObject(eeClass);
jfieldID eeExcp_id = env->GetFieldID(eeClass, "enroll_exception", "I");
env->SetIntField(enrollException, eeExcp_id, ef);
env->Throw((jthrowable)enrollException);
}
else
{
/* Fills the object with the enrollment data */
cfp2jfp(env, obj, pdp);
memset(pdp, 0, sizeof(fp_print_data));
fp_print_data_free(pdp);
}
fp_dev_close(device);
fp_exit();
return obj;
}
struct fp_print_data *enroll(struct fp_dev *dev) {
struct fp_print_data *enrolled_print = NULL;
int r;
printf("You will need to successfully scan your finger %d times to "
"complete the process.\n", fp_dev_get_nr_enroll_stages(dev));
do {
sleep(1);
printf("\nScan your finger now.\n");
r = fp_enroll_finger(dev, &enrolled_print);
if (r < 0) {
printf("Enroll failed with error %d\n", r);
return NULL;
}
switch (r) {
case FP_ENROLL_COMPLETE:
printf("Enroll complete!\n");
break;
case FP_ENROLL_FAIL:
printf("Enroll failed, something wen't wrong :(\n");
return NULL;
case FP_ENROLL_PASS:
printf("Enroll stage passed. Yay!\n");
break;
case FP_ENROLL_RETRY:
printf("Didn't quite catch that. Please try again.\n");
break;
case FP_ENROLL_RETRY_TOO_SHORT:
printf("Your swipe was too short, please try again.\n");
break;
case FP_ENROLL_RETRY_CENTER_FINGER:
printf("Didn't catch that, please center your finger on the "
"sensor and try again.\n");
break;
case FP_ENROLL_RETRY_REMOVE_FINGER:
printf("Scan failed, please remove your finger and then try "
"again.\n");
break;
}
} while (r != FP_ENROLL_COMPLETE);
if (!enrolled_print) {
fprintf(stderr, "Enroll complete but no print?\n");
return NULL;
}
printf("Enrollment completed!\n\n");
return enrolled_print;
}