BinaryPruningCrossover

BinaryPruningCrossover — logical pruning crossover operator for binary masks.

Given two parent topic masks (true = topic selected), produces two children:

• Selective child: bit = ParentA AND ParentB (intersection of selected topics).

• Inclusive child: bit = ParentA OR ParentB (union of selected topics).

Behavior:

• Each child has exactly N bits, where N = totalNumberOfBits().

• If a child mask is all-false, one random bit is flipped to true to ensure feasibility.

• Operates in place on BestSubsetSolution copies.

Robustness:

• jMetal may pass DefaultBinarySolution instances. This operator lifts them into BestSubsetSolution objects (bitset and objectives copied, labels synthesized).

Determinism:

• All randomness goes through jMetal’s JMetalRandom singleton for reproducibility.

Complexity:

• O(N) bitwise operations per crossover.

Parameters