BlockPartitioner.java

package Salsa.Core;

public final class BlockPartitioner {
    public static Block[][] Partition(int rowCount, int columnCount, int numRowBlocks, int numColumnBlocks) {
        return Partition(0, 0, rowCount, columnCount, numRowBlocks, numColumnBlocks);
    }

    public static Block[][] Partition(int rowStartIndex, int columnStartIndex, int rowCount, int columnCount, int numRowBlocks, int numColumnBlocks) {
        Range[] rowRanges = RangePartitioner.Partition(rowStartIndex, rowCount, numRowBlocks);
        Range[] colRanges = RangePartitioner.Partition(columnStartIndex, columnCount, numColumnBlocks);
        Block[][] result = new Block[numRowBlocks][];

        for (int i = 0; i < rowRanges.length; i++) {
            result[i] = new Block[numColumnBlocks];

            for (int j = 0; j < colRanges.length; j++) {
                result[i][j] = new Block(rowRanges[i], colRanges[j]);
            }
        }

        return result;
    }

    public static Block[][] PartitionByLength(int rowCount, int columnCount, int maxRowPartitionLength, int maxColumnPartitionLength) {
        return PartitionByLength(0, 0, rowCount, columnCount, maxRowPartitionLength, maxColumnPartitionLength);
    }

    public static Block[][] PartitionByLength(int rowStartIndex, int columnStartIndex, int rowCount, int columnCount, int maxRowPartitionLength, int maxColumnPartitionLength) {
        Range[] rowRanges = RangePartitioner.PartitionByLength(rowStartIndex, rowCount, maxRowPartitionLength);
        Range[] colRanges = RangePartitioner.PartitionByLength(columnStartIndex, columnCount, maxColumnPartitionLength);
        Block[][] result = new Block[rowRanges.length][];

        for (int i = 0; i < rowRanges.length; i++) {
            result[i] = new Block[colRanges.length];

            for (int j = 0; j < colRanges.length; j++) {
                result[i][j] = new Block(rowRanges[i], colRanges[j]);
            }
        }

        return result;
    }
}