package net.sourceforge.finmodel.asset;
   
   import java.math.BigDecimal;
   import java.util.Calendar;
   import java.util.HashMap;
   import java.util.Map;
   
   import net.sourceforge.finmodel.asset.stock.StockLookup;
   
  public class Stock extends AssetImpl implements Asset {
  	public static final long serialVersionUID = 1L;
  	
  	private String ticker;
  	private String exchange;
  	private BigDecimal cost;
  	private BigDecimal divYield;
  	private BigDecimal growth;
  	
  	private static Map<String, Stock> allStocks = new HashMap<String, Stock>();
  	
  	private void init(String ticker) {
  		StockLookup lookup = new StockLookup( ticker );
  		this.ticker = ticker;
  		this.name = lookup.getName();
  		this.cost = lookup.getPrice();
  		exchange = lookup.getExchange();
  		divYield = lookup.getDividendYield();
  		growth = new BigDecimal("0.05");		
  		this.apr = growth.add(divYield);
  		if (!allStocks.containsKey(ticker)) {
  			allStocks.put(ticker, this);
  		}
  	}
  	
  	public Stock() {
  		super("Unknown", BigDecimal.ONE, BigDecimal.ZERO);
  	}
  	/** 
  	 * Creates a stock with a zero balance.
  	 * @param ticker
  	 */
  	public Stock(String ticker) {
  		super(ticker, BigDecimal.ONE, BigDecimal.ZERO);
  		init(ticker);
  	}
  	
  	protected void setDividendYield(BigDecimal divYield) {
  		this.divYield = divYield;
  	}
  	
  	public BigDecimal getDividendYield() {
  		return divYield;
  	}
  	
  	@Override
  	public BigDecimal getEstimatedValue( Calendar cal )
  	{
  		return cost;
  	}
  	
  	protected void setTicker(String ticker) {
  		this.ticker = ticker;
  	}
  	
  	public String getTicker() {
  		return ticker;
  	}
  
  	protected void setExchange(String exchange) {
  		this.exchange = exchange;
  	}
  	
  	public String getExchange() {
  		return exchange;
  	}
  
  	/**
  	 * @param divYield the divYield to set
  	 */
  	protected void setDivYield(BigDecimal divYield) {
  		this.divYield = divYield;
  	}
  
  	/**
  	 * @return the divYield
  	 */
  	protected BigDecimal getDivYield() {
  		return divYield;
  	}
  	
  	public static Stock getStock(String ticker) {
  		if (allStocks.containsKey(ticker)) {
  			return allStocks.get(ticker);
  		} else {
  			synchronized (allStocks) {
  				if (allStocks.containsKey(ticker)) {
  					return allStocks.get(ticker);
  				} else {
  					Stock rc = new Stock(ticker);
 					allStocks.put(ticker, rc);
 					return rc;
 				}
 			}
 		}
 	}
 }