japod@6: package org.apidesign.apifest08.currency;
japod@6: 
japod@6: import java.io.Serializable;
japod@6: import java.math.BigDecimal;
japod@6: import java.util.Currency;
japod@6: 
japod@6: /**
japod@6:  * Default implementation of {@link Money} interface. This class is immutable.
japod@6:  * @author lukas
japod@6:  *
japod@6:  */
japod@6: public final class MoneyImpl implements Serializable, Money{
japod@6: 	private static final long serialVersionUID = -6091808475616516136L;
japod@6: 
japod@6: 	private final BigDecimal amount;
japod@6: 	
japod@6: 	private final Currency currency;
japod@34: 	
japod@6: 	public MoneyImpl(BigDecimal amount, Currency currency) {
japod@6: 		if (amount==null) throw new NullPointerException("Amount is null");
japod@6: 		if (currency==null) throw new NullPointerException("Currency is null"+currency);
japod@16: 		this.amount = amount;
japod@6: 		this.currency = currency;
japod@6: 	}
japod@6: 	
japod@34: 	
japod@34: 	
japod@6: 	public MoneyImpl(long amount, Currency currency) {
japod@6: 		this(BigDecimal.valueOf(amount), currency);
japod@6: 	}
japod@6: 	
japod@6: 	public MoneyImpl(double amount, Currency currency) {
japod@6: 		this(BigDecimal.valueOf(amount), currency);
japod@6: 	}
japod@34: 	
japod@34: 	/**
japod@34: 	 * Factory method.
japod@34: 	 * @param amount
japod@34: 	 * @param currency
japod@34: 	 * @return
japod@34: 	 */
japod@34: 	public static final Money money(BigDecimal amount, Currency currency)
japod@34: 	{
japod@34: 		return new MoneyImpl(amount, currency);
japod@34: 	}
japod@34: 	/**
japod@34: 	 * Factory method.
japod@34: 	 * @param amount
japod@34: 	 * @param currency
japod@34: 	 * @return
japod@34: 	 */
japod@34: 	public static final Money money(long amount, Currency currency)
japod@34: 	{
japod@34: 		return new MoneyImpl(amount, currency);
japod@34: 	}
japod@34: 	/**
japod@34: 	 * Factory method.
japod@34: 	 * @param amount
japod@34: 	 * @param currency
japod@34: 	 * @return
japod@34: 	 */
japod@34: 	public static final Money money(double amount, Currency currency)
japod@34: 	{
japod@34: 		return new MoneyImpl(amount, currency);
japod@34: 	}
japod@6: 
japod@16: 	/**
japod@16: 	 * Returns amount.
japod@16: 	 * @return
japod@6: 	 */
japod@6: 	public BigDecimal getAmount() {
japod@6: 		return amount;
japod@6: 	}
japod@6: 	
japod@16: 	/**
japod@16: 	 * Returns currency.
japod@6: 	 */
japod@6: 	public Currency getCurrency() {
japod@6: 		return currency;
japod@6: 	}
japod@6: 
japod@6: 	@Override
japod@6: 	public int hashCode() {
japod@6: 		final int prime = 31;
japod@6: 		int result = 1;
japod@6: 		result = prime * result + ((amount == null) ? 0 : amount.hashCode());
japod@6: 		result = prime * result
japod@6: 				+ ((currency == null) ? 0 : currency.hashCode());
japod@6: 		return result;
japod@6: 	}
japod@6: 
japod@6: 	@Override
japod@6: 	public boolean equals(Object obj) {
japod@6: 		if (this == obj)
japod@6: 			return true;
japod@6: 		if (obj == null)
japod@6: 			return false;
japod@6: 		if (!(obj instanceof MoneyImpl))
japod@6: 			return false;
japod@6: 		MoneyImpl other = (MoneyImpl) obj;
japod@6: 		if (amount == null) {
japod@6: 			if (other.amount != null)
japod@6: 				return false;
japod@16: 		} else if (amount.compareTo(other.amount)!=0)
japod@6: 			return false;
japod@6: 		if (currency == null) {
japod@6: 			if (other.currency != null)
japod@6: 				return false;
japod@6: 		} else if (!currency.equals(other.currency))
japod@6: 			return false;
japod@6: 		return true;
japod@6: 	}
japod@6: 	
japod@6: 	@Override
japod@6: 	public String toString() {
japod@6: 		return getClass().getName()+"["+currency+amount+"]";
japod@6: 	}
japod@6: 
japod@6: 	
japod@6: 	
japod@6: }