/*
 * Created on Apr 24, 2005
 */
package stockportfolio;

import java.util.Date;

/** Information about one block of stock.  
 * Concrete implementations should have a constructor with parameters
 * <br> stock
 * <br> Date dateBought
 * <br> double numShares, must be >0
 * <br> double pricePerShare, must be >0
 */
public interface IStockBlock {
    
    /** Tells the stock which was bought or sold.  This should be the
     * "normalized" stock name (see instructions).
     * 
     * @return a non-null String
     */
    String getStock();
    
    /** Tells the date the stock was purchased.
     * 
     * @return non-null date the stock was purchased
     */
    Date getTransactionDate();
    
    /** Tells the number of shares in this block
     * 
     * @return the number of shares, which is always >0.
     */
    double getShares();
        
    /** Tells the price per share of shares in this block
     * 
     * @return the price per share, which must be >0
     */
    double getPricePerShare();
    


}