package mikera.matrixx.impl;

import mikera.matrixx.AMatrix;
import mikera.vectorz.AVector;
import mikera.vectorz.Op;
import mikera.vectorz.Vector;
import mikera.vectorz.Vectorz;
import mikera.vectorz.impl.Vector0;
import mikera.vectorz.util.ErrorMessages;

/**
 * Abstract base class for matrices that use a collection of Vectors 
 * as storage for the matrix rows.
 * 
 * @author Mike
 */
public abstract class AVectorMatrix extends ARectangularMatrix implements IFastRows {
	private static final long serialVersionUID = -6838429336358726743L;

	protected AVectorMatrix(int rows, int cols) {
		super(rows, cols);
	}
	
	/* ================================
	 * Abstract interface
	 */
	
	/**
	 * Replaces a row in this matrix. The row must be of a type allowed by the matrix.
	 * 
	 * Detaches the current row: this will invalidate views over the matrix that include the original row.
	 * @param i
	 * @param row
	 */
	@Override
	public abstract void replaceRow(int i, AVector row);
	
	/**
	 * Gets a row of the matrix. 
	 * 
	 * Guaranteed to be an existing vector view by all descendants of AVectorMatrix.
	 */
	@Override
	public abstract T getRow(int row);
	
	@Override
	public final T getRowView(int i) {
		return getRow(i);
	}

	@Override
	public double get(int row, int column) {
		return getRow(row).get(column);
	}
	
	@Override
	public double unsafeGet(int row, int column) {
		return getRow(row).unsafeGet(column);
	}
	
	@Override
	public boolean isFullyMutable() {
		int rc=rowCount();
		for (int i=0; i