  We present the exact solution of the three-dimensional Duffin--Kemmer--Petiau
oscillator for both spin 0 and spin 1 cases, with the presence of minimal
uncertainty in momentum in anti--de Sitter model. We use the representation of
vector spherical harmonics and the Nikiforov--Uvarov method to determine
exactly the energy eigenvalues and the eigenfunctions in all cases. Our study
of the energy spectrum allows us to define a new interpretation of natural and
unnatural parity states of the vector particle and we show the crucial role
played by the spin--orbit coupling in this differentiation between the
parities.
