How to use

queryFrom

method

in

javax.money.MonetaryQuery

@Override
public <R> R query(MonetaryQuery<R> query) {
  return query.queryFrom(this);
}

/**
 * Queries this monetary amount for a value.
 * <p>
 * This queries this amount using the specified query strategy object.
 * <p>
 * Implementations must ensure that no observable state is altered when this read-only method is
 * invoked.
 *
 * @param <R>   the type of the result
 * @param query the query to invoke, not null
 * @return the query result, null may be returned (defined by the query)
 */
default <R> R query(MonetaryQuery<R> query){
  return query.queryFrom(this);
}

@Override
public <R> R query(MonetaryQuery<R> query) {
  Objects.requireNonNull(query);
  try {
    return query.queryFrom(this);
  } catch (MonetaryException e) {
    throw e;
  } catch (Exception e) {
    throw new MonetaryException("Query failed: " + query, e);
  }
}

@Override
public <T> T query(MonetaryQuery<T> query) {
  Objects.requireNonNull(query);
  try {
    return query.queryFrom(this);
  } catch (MonetaryException | ArithmeticException e) {
    throw e;
  } catch (Exception e) {
    throw new MonetaryException("Query failed: " + query, e);
  }
}

@Override
public <R> R query(MonetaryQuery<R> query) {
  Objects.requireNonNull(query);
  try {
    return query.queryFrom(this);
  } catch (MonetaryException | ArithmeticException e) {
    throw e;
  } catch (Exception e) {
    throw new MonetaryException("Query failed: " + query, e);
  }
}

@Override
protected Object[] toConvertedColumns(MonetaryAmount value) {
  return new Object[] { value.getCurrency(), MonetaryQueries.extractMajorPart().queryFrom(value).longValue() };
}
 

@Override
protected Object[] toConvertedColumns(MonetaryAmount value) {
  return new Object[] { value.getCurrency(), MonetaryQueries.extractMajorPart().queryFrom(value).longValue() };
}
 

@Override
public Long toNonNullValue(MonetaryAmount value) {
  if (!currencyUnit.equals(value.getCurrency())) {
    throw new IllegalStateException("Expected currency " + currencyUnit.getCurrencyCode() + " but was " + value.getCurrency());
  }
  return MonetaryQueries.extractMajorPart().queryFrom(value).longValue();
}

@Override
public Long toNonNullValue(MonetaryAmount value) {
  if (!currencyUnit.equals(value.getCurrency())) {
    throw new IllegalStateException("Expected currency " + currencyUnit.getCurrencyCode() + " but was " + value.getCurrency());
  }
  return MonetaryQueries.extractMajorPart().queryFrom(value).longValue();
}