private FactorialLog()

in commons-rng-sampling/src/main/java/org/apache/commons/rng/sampling/distribution/InternalUtils.java [289:312]

• 19 lines of code
• 5 McCabe index (conditional complexity)

        private FactorialLog(int numValues,
                             double[] cache) {
            logFactorials = new double[numValues];

            final int endCopy;
            if (cache != null && cache.length > BEGIN_LOG_FACTORIALS) {
                // Copy available values.
                endCopy = Math.min(cache.length, numValues);
                System.arraycopy(cache, BEGIN_LOG_FACTORIALS, logFactorials, BEGIN_LOG_FACTORIALS,
                    endCopy - BEGIN_LOG_FACTORIALS);
            } else {
                // All values to be computed
                endCopy = BEGIN_LOG_FACTORIALS;
            }

            // Compute remaining values.
            for (int i = endCopy; i < numValues; i++) {
                if (i < LOG_FACTORIALS.length) {
                    logFactorials[i] = LOG_FACTORIALS[i];
                } else {
                    logFactorials[i] = logFactorials[i - 1] + Math.log(i);
                }
            }
        }