package org.apidesign.apifest08.currency;

import java.util.*;

/**

 * Exception thrown in cases that a CurrencyConverter is unable ensure requested accuracy of conversion.

 * Such situation may occur in cases that the client is not on-line, or the exchange rates are older than

 * requested etc. This exception is defined as RuntimeException to enable simple usage in simple applications,

 * but enable other applications to be informed about possible problems and prevent them from using

 * inaccurate data.

 */

public final class CurrencyConversionException extends RuntimeException {

	private final Currency from;

	private final Currency to;

	CurrencyConversionException(Currency from, Currency to) {

		this(from, to, (Throwable) null);

	}

	CurrencyConversionException(Currency from, Currency to, Throwable throwable) {

		this(from, to, String.format("Failed to convert curency from %1$s to %2$s", from, to), throwable);

	}

	CurrencyConversionException(Currency from, Currency to, String message) {

		this(from, to, message, null);

	}

	CurrencyConversionException(Currency from, Currency to, String message, Throwable throwable) {

		super(message, throwable);

		this.from = from;

		this.to = to;

	}

	public Currency getFromCurrency() {

		return from;

	}

	public Currency getToCurrency() {

		return to;

	}

}