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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 mortgage;
import org.osoa.sca.annotations.Service;
/**
* An implementation of the Calculator service.
*/
@Service(MortgageCalculator.class)
public class MortgageCalculatorImpl implements MortgageCalculator {
public double getMonthlyPayment(double principal, int years, float interestRate) {
double monthlyRate = interestRate / 12.0 / 100.0;
double p = Math.pow(1 + monthlyRate, years * 12);
double q = p / (p - 1);
double monthlyPayment = principal * monthlyRate * q;
System.out.println("Monthly payment for a " + years + "-year loan of $" + principal + ": " + monthlyPayment);
return monthlyPayment;
}
}
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