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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 scatours.currency.impl;
import java.util.HashMap;
import java.util.Map;
import org.oasisopen.sca.annotation.Service;
import scatours.currency.CurrencyConverter;
/**
* An implementation of the CurrencyConverter service
*/
@Service(CurrencyConverter.class)
public class CurrencyConverterImpl implements CurrencyConverter {
// currency index
private Map<String, Integer> currencyIndex = new HashMap<String, Integer>();
// exchange rates
private final float rates[][] = { {1.00f, 0.50f, 0.66f}, {2.00f, 1.00f, 1.33f}, {1.50f, 0.75f, 1.00f}};
public CurrencyConverterImpl() {
currencyIndex.put("USD", new Integer(0));
currencyIndex.put("GBP", new Integer(1));
currencyIndex.put("EUR", new Integer(2));
}
public float getExchangeRate(String fromCurrencyCode, String toCurrencyCode) {
return rates[currencyIndex.get(fromCurrencyCode).intValue()][currencyIndex.get(toCurrencyCode).intValue()];
}
public float convert(String fromCurrencyCode, String toCurrencyCode, float amount) {
return amount * getExchangeRate(fromCurrencyCode, toCurrencyCode);
}
}
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