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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 calculator;
import org.oasisopen.sca.annotation.Reference;
/**
* An implementation of the Calculator service.
*/
public class CalculatorServiceImpl implements CalculatorService {
private AddService addService;
private SubtractService subtractService;
private MultiplyService multiplyService;
private DivideService divideService;
@Reference
public void setAddService(AddService addService) {
this.addService = addService;
}
@Reference
public void setSubtractService(SubtractService subtractService) {
this.subtractService = subtractService;
}
@Reference
public void setDivideService(DivideService divideService) {
this.divideService = divideService;
}
@Reference
public void setMultiplyService(MultiplyService multiplyService) {
this.multiplyService = multiplyService;
}
public String add(String n1, String n2) {
//System.out.println("ADD Operation ==> " + n1 + " + " + n2 + " = " + addService.add(Double.parseDouble(n1), Double.parseDouble(n2)));
return String.valueOf(addService.add(Double.parseDouble(n1), Double.parseDouble(n2)));
}
public String subtract(String n1, String n2) {
//System.out.println("SUBTRACT Operation ==> " + n1 + " + " + n2 + " = " + subtractService.subtract(Double.parseDouble(n1), Double.parseDouble(n2)));
return String.valueOf(subtractService.subtract(Double.parseDouble(n1), Double.parseDouble(n2)));
}
public String multiply(String n1, String n2) {
//System.out.println("MULTIPLY Operation ==> " + n1 + " + " + n2 + " = " + multiplyService.multiply(Double.parseDouble(n1), Double.parseDouble(n2)));
return String.valueOf(multiplyService.multiply(Double.parseDouble(n1), Double.parseDouble(n2)));
}
public String divide(String n1, String n2) {
//System.out.println("DIVIDE Operation ==> " + n1 + " + " + n2 + " = " + divideService.divide(Double.parseDouble(n1), Double.parseDouble(n2)));
return String.valueOf(divideService.divide(Double.parseDouble(n1), Double.parseDouble(n2)));
}
public String calculate(String formula) {
String[] operands = formula.split("[\\+\\-\\*\\:]");
if(formula.contains("+")) {
return add( operands[0], operands[1]);
} else if(formula.contains("-")) {
return subtract( operands[0], operands[1]);
} else if(formula.contains("*")) {
return multiply( operands[0], operands[1]);
} else if(formula.contains(":")) {
return divide( operands[0], operands[1]);
} else {
throw new IllegalArgumentException("Invalid formula: " + formula );
}
}
}
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