| /* |
| * 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 ); |
| } |
| } |
| |
| } |