package jicos.examples.pieceworkmatrixproduct;

final class Matrix implements java.io.Serializable
{
    int[][] m;

    public Matrix( int[][] m ) 
    {
        this.m = m;
    }
    
    public Matrix( int n )
    {
        int[][] m = new int[n][n];
        for( int i = 0; i < n; i++ )
        for( int j = 0; j < n; j++ )
        {
            m[i][j] = 0;
        }
        this.m = m;
    }
    
    void addSubMatrix( Matrix s, int row, int col, int rows, int cols)
    {
        for( int i = 0; i < rows; i++ )
        for( int j = 0; j < cols; j++ )
        {
            m[i + row][j + col] += s.m[i][j];
        }
    }
    
    static Matrix makeMatrix( int n )
    {
        int[][] matrix = new int[n][n];
        for ( int i = 0; i < n; i++)
        for ( int j = 0; j < n; j++)
        {
            matrix[i][j] = 1;
        }
        return new Matrix( matrix );
    }
    
    void print()
    {
        for( int i = 0; i < m.length; i++ )
        {
            System.out.print(" row " + i + ":");
            for( int j = 0; j < m[0].length; j++ )
            {
                System.out.print(" " + m[i][j]);
            }
            System.out.println(" ");
        }
    }
}