India — going ‘ballistic’?

Reports coming from India suggest that on May 15 it successfully tested a locally-designed supersonic anti-ballistic missile. Considering the no-first use nuclear doctrine that India follows and Pakistan does not, the lack of an anti-ballistic missile technology was a gap in Indian security. But has that gap been filled now by the test-firing of the missile? If not, how long will it take for India to build up an anti-missile defence shield? What are the implications and strategic effects of this renewed Indian interest in the development, induction and expansion of missile systems in its armed forces? And how is Pakistan likely to respond to this Indian development?