1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/task1/solution02/src/org/apidesign/apifest08/currency/MoneyImpl.java Sun Sep 28 14:12:38 2008 +0200
1.3 @@ -0,0 +1,87 @@
1.4 +package org.apidesign.apifest08.currency;
1.5 +
1.6 +import java.io.Serializable;
1.7 +import java.math.BigDecimal;
1.8 +import java.util.Currency;
1.9 +
1.10 +/**
1.11 + * Default implementation of {@link Money} interface. This class is immutable.
1.12 + * @author lukas
1.13 + *
1.14 + */
1.15 +public final class MoneyImpl implements Serializable, Money{
1.16 + private static final long serialVersionUID = -6091808475616516136L;
1.17 +
1.18 + private final BigDecimal amount;
1.19 +
1.20 + private final Currency currency;
1.21 +
1.22 + public MoneyImpl(BigDecimal amount, Currency currency) {
1.23 + if (amount==null) throw new NullPointerException("Amount is null");
1.24 + if (currency==null) throw new NullPointerException("Currency is null"+currency);
1.25 + this.amount = amount.setScale(2);
1.26 + this.currency = currency;
1.27 + }
1.28 +
1.29 + public MoneyImpl(long amount, Currency currency) {
1.30 + this(BigDecimal.valueOf(amount), currency);
1.31 + }
1.32 +
1.33 + public MoneyImpl(double amount, Currency currency) {
1.34 + this(BigDecimal.valueOf(amount), currency);
1.35 + }
1.36 +
1.37 + /* (non-Javadoc)
1.38 + * @see org.apidesign.apifest08.currency.Money#getAmount()
1.39 + */
1.40 + public BigDecimal getAmount() {
1.41 + return amount;
1.42 + }
1.43 +
1.44 + /* (non-Javadoc)
1.45 + * @see org.apidesign.apifest08.currency.Money#getCurrency()
1.46 + */
1.47 + public Currency getCurrency() {
1.48 + return currency;
1.49 + }
1.50 +
1.51 + @Override
1.52 + public int hashCode() {
1.53 + final int prime = 31;
1.54 + int result = 1;
1.55 + result = prime * result + ((amount == null) ? 0 : amount.hashCode());
1.56 + result = prime * result
1.57 + + ((currency == null) ? 0 : currency.hashCode());
1.58 + return result;
1.59 + }
1.60 +
1.61 + @Override
1.62 + public boolean equals(Object obj) {
1.63 + if (this == obj)
1.64 + return true;
1.65 + if (obj == null)
1.66 + return false;
1.67 + if (!(obj instanceof MoneyImpl))
1.68 + return false;
1.69 + MoneyImpl other = (MoneyImpl) obj;
1.70 + if (amount == null) {
1.71 + if (other.amount != null)
1.72 + return false;
1.73 + } else if (!amount.equals(other.amount))
1.74 + return false;
1.75 + if (currency == null) {
1.76 + if (other.currency != null)
1.77 + return false;
1.78 + } else if (!currency.equals(other.currency))
1.79 + return false;
1.80 + return true;
1.81 + }
1.82 +
1.83 + @Override
1.84 + public String toString() {
1.85 + return getClass().getName()+"["+currency+amount+"]";
1.86 + }
1.87 +
1.88 +
1.89 +
1.90 +}