Method Generate

tensorflow/core/kernels/sparse_cross_op.cc:200–215

      : columns_(columns), num_buckets_(num_buckets), hash_key_(hash_key) {}

  int64 Generate(const int64 batch_index,
                 const std::vector<int>& permutation) const {
    // Do the fingerprint concatenation on uint64.
    uint64 hashed_output = hash_key_;
    for (size_t i = 0; i < permutation.size(); ++i) {
      uint64 hash_i = columns_[i]->Feature(batch_index, permutation[i]);
      hashed_output = FingerprintCat64(hashed_output, hash_i);
    }
    // The return value is int64 based on the number of buckets.
    if (num_buckets_ > 0) {
      return hashed_output % num_buckets_;
    } else {
      // To prevent negative output we take modulo to max int64.
      return hashed_output % std::numeric_limits<int64>::max();
    }
  }

 private:
  const std::vector<std::unique_ptr<ColumnInterface<int64>>>& columns_;