package org.apidesign.apifest08.currency;

/**

 * Creates {@link Convertor} implementations.

 * @author lukas

 *

 */

public class ConvertorFactory {

	private ConvertorFactory()

	{

		//nothing

	}

	/**

	 * Creates {@link Convertor} that converts from sourceEquivalent.currency to destinationEquivalent.currency. 

	 * Exchange rate is set as equivalents. It means if you want to create USD to CZK convertor where USD1 = CZK17 

     * call createConvertor(new MoneyImpl(1, USD), new MoneyImpl(17, CZK)). Convertor created by this method 

     * rounds the result to two decimal places. Convertor created by this method is thread safe.

	 * @param sourceEquivalent

	 * @param destinationEquivalent

	 * @return

	 */

	public static final ExtendedConvertor createConvertor(Money sourceEquivalent, Money destinationEquivalent)

	{

		return mergeConvertors(

				new DefaultConvertor(sourceEquivalent, destinationEquivalent),

				new DefaultConvertor(destinationEquivalent ,sourceEquivalent)

		);

	}

	/**

	 * Merges convertors. The resulting convertor has ability to do all conversions that its underlying 

	 * convertors could do. No consistency validation is done, inconsistent input will result in a convertor with

	 * inconsistent behavior. Convertor created by this method is thread safe.

	 * @param convertors

	 * @return

	 */

	public static final ExtendedConvertor mergeConvertors(ExtendedConvertor... convertors)

	{

		return new CompositeConvertor(convertors);

	}

}