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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  }