001/** 002 * Copyright (c) 2012, 2014, Credit Suisse (Anatole Tresch), Werner Keil and others by the @author tag. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 005 * use this file except in compliance with the License. You may obtain a copy of 006 * the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 012 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 013 * License for the specific language governing permissions and limitations under 014 * the License. 015 */ 016package org.javamoney.moneta.spi; 017 018import javax.money.CurrencyUnit; 019import javax.money.MonetaryAmount; 020import javax.money.convert.ConversionContext; 021import javax.money.convert.ConversionQuery; 022import javax.money.convert.ConversionQueryBuilder; 023import javax.money.convert.CurrencyConversion; 024import javax.money.convert.ExchangeRate; 025import javax.money.convert.ExchangeRateProvider; 026 027/** 028 * This class defines a {@link CurrencyConversion} that is converting to a 029 * specific target {@link CurrencyUnit}. Each instance of this class is bound to 030 * a specific {@link ExchangeRateProvider}, a term {@link CurrencyUnit} and a 031 * target timestamp. 032 * 033 * @author Anatole Tresch 034 */ 035public class LazyBoundCurrencyConversion extends AbstractCurrencyConversion implements CurrencyConversion { 036 037 private final ExchangeRateProvider rateProvider; 038 039 private final ConversionQuery conversionQuery; 040 041 public LazyBoundCurrencyConversion(ConversionQuery conversionQuery, ExchangeRateProvider rateProvider, 042 ConversionContext conversionContext) { 043 044 super(conversionQuery.getCurrency(), conversionContext); 045 this.conversionQuery = conversionQuery; 046 this.rateProvider = rateProvider; 047 } 048 049 /** 050 * Get the exchange rate type that this provider instance is providing data 051 * for. 052 * 053 * @return the exchange rate type if this instance. 054 */ 055 @Override 056 public ExchangeRate getExchangeRate(MonetaryAmount amount) { 057 return this.rateProvider.getExchangeRate(ConversionQueryBuilder 058 .of(conversionQuery).setBaseCurrency(amount.getCurrency()) 059 .build()); 060 // return this.rateProvider.getExchangeRate(amount.getCurrency(), 061 // getCurrency()); 062 } 063 064 @Override 065 public ExchangeRateProvider getExchangeRateProvider() { 066 return this.rateProvider; 067 } 068 069 /* 070 * (non-Javadoc) 071 * 072 * @see 073 * org.javamoney.moneta.conversion.AbstractCurrencyConversion#with(javax 074 * .money.convert.ConversionContext) 075 */ 076 @Override 077 public CurrencyConversion with(ConversionContext conversionContext) { 078 return new LazyBoundCurrencyConversion(conversionQuery, rateProvider, 079 conversionContext); 080 } 081 082 /* 083 * (non-Javadoc) 084 * 085 * @see java.lang.Object#toString() 086 */ 087 @Override 088 public String toString() { 089 return "CurrencyConversion [MonetaryAmount -> MonetaryAmount; provider=" + rateProvider + ", context=" + 090 getContext() + ", termCurrency=" + getCurrency() + ']'; 091 } 092 093}