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);

 	}

 }