1 /**
2 * Copyright 2005-2012 The Kuali Foundation
3 *
4 * Licensed under the Educational Community License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.opensource.org/licenses/ecl2.php
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.kuali.ole;
17
18 /**
19 * Kuali Rice ArcheType Help
20 * <p/>
21 * This is an example of a service implementation.
22 * <p/>
23 * An implementation of the ProductService that uses addition.
24 */
25 public class AdditionProductServiceImpl implements ProductService {
26 @Override
27 public Integer product(Integer left, Integer right) {
28
29 if (left == null) {
30 throw new IllegalArgumentException("left is null");
31 }
32
33 if (right == null) {
34 throw new IllegalArgumentException("right is null");
35 }
36
37 final int absRight = Math.abs(right);
38
39 int sum = 0;
40 for (int i = 0; i < absRight; i++) {
41 sum += left;
42 }
43
44 return absRight != right.intValue() ? -sum : sum;
45 }
46 }