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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package com.tuscanyscatours.currencyconverter.impl;
import java.util.HashMap;
import java.util.Map;
import org.osoa.sca.annotations.Service;
import com.tuscanyscatours.currencyconverter.CurrencyConverter;
/**
* An implementation of the CurrencyConverter service
*/
@Service(interfaces = {CurrencyConverter.class})
public class CurrencyConverterImpl implements CurrencyConverter {
// currency index
private Map<String, Integer> currencyIndex = new HashMap<String, Integer>();
// exchange rates
private final double rates[][] = { {1.00, 0.50, 0.66}, {2.00, 1.00, 1.33}, {1.50, 0.75, 1.00}};
public CurrencyConverterImpl() {
currencyIndex.put("USD", new Integer(0));
currencyIndex.put("GBP", new Integer(1));
currencyIndex.put("EUR", new Integer(2));
}
public double getExchangeRate(String fromCurrencyCode, String toCurrencyCode) {
return rates[currencyIndex.get(fromCurrencyCode).intValue()][currencyIndex.get(toCurrencyCode).intValue()];
}
public double convert(String fromCurrencyCode, String toCurrencyCode, double amount) {
return amount * getExchangeRate(fromCurrencyCode, toCurrencyCode);
}
}
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