Peter Tulaga was found guilty of attempted murder by a panel of assessors during a trial in May.
The presiding judge also found him guilty of other charges, including having an illegal weapon and ammunition.
The 34-year-old victim was shot in the face by Tulaga.
She suffered serious facial injuries and has been receiving medical treatment in New Zealand since the incident in January.
The victim, in her statement read in court by one of her sisters, said she has suffered from blindness, has no sense of smell, and will no longer live in a normal life as a result of her injuries.
She asked the court for justice in order to send a message for the protection of other women.