Lucene.Net.Facet.Taxonomy.WriterCache.CompactLabelToOrdinal.Grow C# (CSharp) Method

        private void Grow()
        {
            HashArray temp = this.hashArrays[this.hashArrays.Length - 1];

            for (int i = this.hashArrays.Length - 1; i > 0; i--)
            {
                this.hashArrays[i] = this.hashArrays[i - 1];
            }

            this.capacity *= 2;
            this.hashArrays[0] = new HashArray(this.capacity);

            for (int i = 1; i < this.hashArrays.Length; i++)
            {
                int[] sourceOffsetArray = this.hashArrays[i].offsets;
                int[] sourceCidsArray = this.hashArrays[i].cids;

                for (int k = 0; k < sourceOffsetArray.Length; k++)
                {

                    for (int j = 0; j < i && sourceOffsetArray[k] != 0; j++)
                    {
                        int[] targetOffsetArray = this.hashArrays[j].offsets;
                        int[] targetCidsArray = this.hashArrays[j].cids;

                        int newIndex = IndexFor(StringHashCode(this.labelRepository, sourceOffsetArray[k]), targetOffsetArray.Length);
                        if (targetOffsetArray[newIndex] == 0)
                        {
                            targetOffsetArray[newIndex] = sourceOffsetArray[k];
                            targetCidsArray[newIndex] = sourceCidsArray[k];
                            sourceOffsetArray[k] = 0;
                        }
                    }
                }
            }

            for (int i = 0; i < temp.offsets.Length; i++)
            {
                int offset = temp.offsets[i];
                if (offset > 0)
                {
                    int hash = StringHashCode(this.labelRepository, offset);
                    AddLabelOffset(hash, temp.cids[i], offset);
                }
            }

            CollisionMap oldCollisionMap = this.collisionMap;
            this.collisionMap = new CollisionMap(oldCollisionMap.Capacity, this.labelRepository);
            this.threshold = (int)(this.capacity * this.loadFactor);

            var it = oldCollisionMap.GetEnumerator();

            while (it.MoveNext())
            {
                var e = it.Current;
                AddLabelOffset(StringHashCode(this.labelRepository, e.offset), e.cid, e.offset);
            }
        }