<hibernate-mapping>
  <class name="willow.ExchangeRate" table="exchange_rates">
    <id name="id">
      <generator class="native"/>
    </id>
    <property name="moduser"/>
    <property name="moddate" type="timestamp"/>
    <property name="date" type="timestamp"/>
    <many-to-one class="willow.Currency" column="currency" name="currency" not-found="ignore"/>
    <property name="value"/>
  </class>

  <class name="willow.Currency" table="currencies">
    <id name="id">
      <generator class="native"/>
    </id>
    <property name="moduser"/>
    <property name="moddate" type="timestamp"/>
    <property name="currency_id"/>
    <property name="name"/>
    <property name="symbol"/>
  </class>
</hibernate-mapping>

@ManyToOne
@JoinColumn(name="currency")
public Currency getCurrency() {
  return currency;
}